PKG-DS-6
December 1998
PKG-DS-6
Commercial Self-Contained
Air Conditioners
Remote Air-Cooled
Condensers
20 Through 80 Ton - 60 Hz
Self-Contained Signature Series
Affordable Self-Contained Value from Trane
Trane’s advanced technology brings unmatched reliability, high
performance and affordable cost
Waterside economizer
(cleanable option shown)
Sight glasses with
ports for viewing
while unit is running
Hinged and removable control
panel door for easy access
Unit mounted
microprocessor control
2-inch flat filter
box inside unit
casing
Energy saving single fan
with inlet guide vanes or
variable frequency drives
Internally trapped
drain for low cost
installation
Waterside valve
package option to
enhance system
efficiency
Trane 3-D® Scroll Compressor
for reliability, effiency and
quiet operation
Two-bolt connection on cleanable
condenser for quick, easy
maintenance
2
Contents
3
Features and Benefits
4
Application Considerations
7
Selection Procedure
12
Model Number Description
14
General Data
16
Performance Data
Airside Pressure Drops
Waterside Pressure Drops
Water-Cooled Units
Air-Cooled Units
Steam Coils
20
20
26
28
56
64
Electrical Data
65
Dimensional Data
66
Service Clearances
72
Weights
74
Controls
76
Options
82
Mechanical Specifications
86
Features
and
Benefits
Why Consider Self-Contained
Floor-by-Floor Systems?
Improved Cash Management
• Factory installed options and testing:
Reduces field labor and installation risk
and improves system reliability
• Requires less sophisticated
maintenance than built-up systems
Tenant Satisfaction
• Complete HVAC system on each floor
minimizes tenant inconvenience during
routine maintenance
• Tenants can control system after hours
to increase productivity and minimize
expense
Low First Cost
• Factory packaged controls and piping
reduce field labor, installation time and
cost
• Installed tonnage can be reduced by 20
percent taking advantage of building
diversity and VAV flexibility
• Flexible air discharge arrangement to
match most building configurations
Lower Installed Cost
• Single point power connection
• Single point water connection
• Factory commissioned and tested
controls
• Factory installed options
• Internally trapped drain connection
Economical Operation
• Free cooling year-round with waterside
or airside economizer
• Floor-by-floor system results in energy
savings since only air conditioners on
floors requiring cooling need to operate
• Annual system energy consumption
comparable to central chilled water
system but with significant energy
consumption reduction during partial
occupancy and after-hours
• Simple heating alternatives include
perimeter radiation and fan powered
VAV
• Integrated water valve control for
energy savings by pump unloading
Assured Acoustical Performance
• Flexible, horizontal discharge plenum
provides smooth airflow, reducing static
pressure losses for optimum acoustical
performance
• Multiple compressor design reduces
acoustical levels. Scroll compressor
design smooths gas flow for quieter
operation
©American Standard Inc. 1998
IAQ Features
• Sloped drain pan
• Stainless steel sloped drain pan
(Optional)
• Internally trapped drain connection
• Double wall construction option
• Matt-faced fiberglass insulation
• High efficiency throwaway filters
• Easily cleanable evaporator,
condensers and waterside
economizers
• Filter access door for easy removal
Enhanced Serviceability
• Self-supporting removable panels
• Quick access service panel fasteners
• Eye level control/service center
• Refrigerant line sight glasses in view
during operation
Integrated Self-Contained Systems:
Profitable, Simple
Integrated Comfort™ System (ICS)
Trane’s Integrated Comfort™ system
improves job profit and increases job
control by combining Trane selfcontained units and a Tracer® building
management system. This integrated
system provides total building comfort
and control. The primary motivation for
building owners/managers in making
the purchasing decision of an HVAC
controls system is no longer just saving
energy; it is having the ability to
automate their facilities and the
convenience of interface to control
systems.
Simplifying The Comfort System
At Trane, we think new technology and
innovation should bring you more
capabilities, more flexibility and at the
same time be able to give you
equipment and systems that are easier
to use, easier to install, commission and
service. The self-contained Integrated
Comfort system saves you time and
money by simplifying system design
and system installation. When used with
Trane’s DDC/VAV boxes (VariTrane®),
system balancing almost goes away
because each VAV box is commissioned
and tested before it leaves the factory.
All the status information and editing
data from the self-contained units, VAV
boxes, lighting and other auxiliary
equipment are available from Tracer for
control, monitoring and service support
of your facility. Tracer, a family of
building automation products from
4
Trane, is designed with robust,
application specific software packages
to minimize custom programming
requirements and enable system setup
and control through simple editing of
parameters in the standard applications
software. Should you select an
Integrated Comfort system for your
facility, the accountability for equipment,
automation and controls is Trane’s!
Typical points available through Tracer
ICS:
• Compressor on/off status
• Ventilation status
• Condenser water flow status
• Percent FLA supply fan
• Heat status
• Heat hours and starts
• Each compressor operating hours
• Each compressor starts
• Supply fan operating hours
• Supply fan starts
• Percent RLA of each compressor
• Supply air pressure
• Supply air temperature
• Suction temperature of each circuit
• Entering condenser water temperature
• Leaving condenser water temperature
• Supply air temperature reset signal
• Morning warmup sensor temperature
• Entering air temperature
• Entering economizer water
temperature
• Zone temperature
Features
and
Benefits
Standard Features
• 20 through 80 ton industrial/commercial
water-cooled self-contained units
• 20 through 60 ton industrial/commercial
air-cooled self-contained units
• Fully integrated, factory-installed/
commissioned microelectronic controls
• Improved Trane 3-D scroll
compressors
• CV or VAV control
• Low ambient compressor lockout
control input
• Coil frost protection on all units
• Morning warmup operation on all units
with heating options
• Emergency stop input
• Occupied/unoccupied switching
• Timed override activation
• Refrigeration circuits that are
®
completely factory piped and tested
(water-cooled)
• Factory piped and tested, mechanically
cleanable water-cooled condensers
• Two-bolt removable condenser
waterboxes for quick and easy cleaning
• Sloped drain pans ensure complete
condensate removal for IAQ
• Internally trapped drain connection with
cleanout
• Internally isolated centrifugal supply fan
• 14-gauge galvanized steel framework
with easily removable painted exterior
panels of 18-gauge galvanized steel
• UL listing on standard options
• Fan belts and grease lines are easily
accessible
• Access panels and clearance provided
to clean both evaporator and waterside
economizer coil fins
Optional Features
• Fully integrated, factory-installed/
commissioned variable frequency drive
control with or without optional bypass
• Fully integrated, factory-installed/
commissioned inlet guide vanes on FC
supply fan
• Waterside economizer with factory
installed piping and controls
• Waterside modulating condensing
pressure control valves on units without
a waterside economizer
• Removable cast iron headers on
cleanable waterside economizer
• Flexible horizontal discharge with or
without factory cut holes
• Heating Options: hot water, steam and
electric
• Refrigerant suction discharge line
service (shut-off) valves
5
• Phenolic coated unit, and/or evaporator
coils
• Double wall construction
• Stainless steel sloped drain pan
• Medium efficiency throwaway filters
• Through-the-door non-fused disconnect
switch
Field Installed Accessories
• Airside economizer control with or
without mixing box
• Programmable sensors with or without
night set back - CV and VAV
• ICS zone sensors used with Tracer
system for zone control
• Ultra low leak dampers for 0-100
®
percent modulating fresh air
economizer
FC Fans With Inlet Guide Vanes
Trane’s forward-curved fans with inlet
guide vanes pre-rotate the air in the
direction of the fan wheel. This
decreases static pressure and
horsepower, essentially the unloading
characteristics of a Trane FC fan with
inlet guide vanes result in superior part
load performance.
Variable Frequency Drives (VFD)
Variable frequency drives are factory
installed, wired and tested to provide
supply fan motor speed modulation.
VFD’s, as compared to inlet guide vanes,
are quieter, more efficient, and in some
areas are eligible for utility rebates. The
VFD’s are available with and without a
bypass option. Bypass control will
simply provide full nominal airflow
when manually placed in the bypass
mode in the unlikely event of drive
failure.
Features
and
Benefits
• Trane 3-D® Scroll Compressor
Simple Design with 70% Fewer Parts
Fewer parts than an equal capacity
reciprocating compressor means
significant reliability and efficiency
benefits. The single orbiting scroll
eliminates the need for pistons,
connecting rods, wrist pins and valves.
Fewer parts lead to increased reliability.
Fewer moving parts, less rotating mass
and less internal friction means greater
efficiency than reciprocating
compressors.
Patented 3-D Scroll Compliance
Trane 3-D scroll compliance provides
important reliability and efficiency
benefits. 3-D compliance allows the
orbiting scrolls to touch in all three
dimensions, forming a completely
enclosed compression chamber which
leads to increased efficiency. In addition,
3-D compliance means the orbiting
scrolls only touch with enough force to
create a seal so there is no wear
between the scroll plates. The fixed and
orbiting scrolls are made of high
strength cast iron which results in less
thermal distortion, less leakage and
higher efficiencies. The most
outstanding feature of the scroll
compressor 3-D compliance is that
slugging will not cause failure. In a
reciprocating compressor, however,
liquid or dirt can cause serious damage.
Low Torque Variation
The 3-D scroll compressor has a very
smooth compression cycle with torque
variations that are only 30 percent of
that produced by a reciprocating
compressor. This means the scroll
compressor imposes very little stress
on the motor for greater reliability. Low
torque variation means reduced noise
and vibration.
Suction Gas Cooled Motor
Compressor motor efficiency and
reliability are further optimized with this
design. Cool suction gas keeps the
motor cooler for longer life and better
efficiency.
Proven Design Through Testing and
Research
With over twenty years of development
and testing, Trane 3-D scroll
compressors have undergone more
than 400,000 hours of laboratory testing
and field operation. This work combined
with over 25 patents makes Trane the
worldwide leader in air conditioning
scroll compressor technology.
One of two matched scroll plates — the
distinguishing feature of the scroll
compressor.
The Chart above illustrates low torque
variation of 3-D Scroll compressors as
compared to a reciprocating
compressor.
6
Application
Considerations
Self-Contained Acoustical
Recommendations
Successful acoustical results are
dependent on many system design
factors.
The following are general
recommendations; for more
information, or if there is concern about
a particular installation, contact a
professional acoustical consultant for
assistance.
Location and Orientation of the
Mechanical Equipment Room
Locate the equipment room adjacent to
stairwells, utility rooms, electrical
closets and rest rooms if possible
(Figure AC-1). This minimizes the
acoustic effects and risk of
workmanship or installation errors. The
discharge and return air ductwork
should be placed over these less
acoustically sensitive areas. Vertical or
horizontal fresh air shafts can be used.
Consult code requirements for fresh air
and smoke purge constraints.
Return Air Ductwork
The return air should be ducted into the
mechanical equipment room. It does not
have to be ducted to the unit unless
dictated by local code. However, this
duct should have an elbow inside the
equipment room. The ductwork should
extend from the elbow inside the
equipment room far enough to block the
“line of sight” to the exterior of the
equipment room. The recommended
minimum length of ductwork exterior to
the equipment room is 15 feet. This duct
should be lined with two-inch, threepound density insulation. Multiple small
return ducts tend to yield better
acoustical performance to the occupied
space.
Supply Air Ductwork
The supply air duct should be insulated
with two-inch, three-pound density
insulation. This lining should extend at
least 15 feet out from the equipment
room wall. The aspect ratio of the duct
should be as small as possible. Large
flat panels transmit sound and should be
minimized. In addition, potential “oil
canning” of the duct due to flow
turbulence will be minimized with small
aspect ratios.
Figure AC-1 — Equipment Room Location and
Orientation
7
A flexible horizontal discharge option
helps avoid complicated ductwork
transitions. Ductwork turning vanes
typically improve pressure drop but
degrade acoustical performance.
Recommended Maximum Air Velocities
The maximum recommended velocity
for the discharge air duct is 2,000 fpm.
The maximum recommended velocity
for the return air duct is 1,000 fpm. Limit
air velocities below these operating
points to minimize the risk of flow
turbulence that causes regenerated
noise. The use of round supply duct and
static regain allows maximum
discharge air velocities up to 4,000 to
5,000 fpm. Round supply duct also
provides substantial attenuation of low
frequency noise. However, the potential
for flow regenerated noise increases
dramatically. Therefore, the quality of
installation of the ductwork greatly
affects the acoustic results of the
installed system.
Application
Considerations
Equipment Room Construction Options
The preferred equipment room wall
construction is concrete block. If this is
not feasible then a double stud offset
wall is suggested (Figure AC-2). This
removes physical contact that would
transmit sound through the equipment
room wall to the occupied space. The
space between the studs should be
interwoven with fiberglass insulation.
Two layers of sheetrock should be used
on each side of the wall.
Figure AC-2 — Double Stud Offset Wall with Interwoven Insulation
Workmanship details are critical to
acoustical performance. All wall and
floor penetrations by the ductwork,
water piping and equipment room
access doors should be sealed with a
flexible material such as caulk and/or
gasketing to stop noise and air leaks.
The equipment room door should be
located away from acoustically
sensitive areas like conference rooms.
The door should swing out of the
equipment room, if possible, so that the
low pressure in the equipment room
pulls the door in to help maintain a tight
seal.
Equipment Options
The factory installed flexible horizontal
discharge allows multiple factory
designed and tested outlet options. This
minimizes the risk of acoustic and/or
pressure drop problems by avoiding
complex transitions close to the fan
discharge.
Static Pressure Versus Acoustics
Design the system to minimize the total
static pressure required from the selfcontained unit fan. Typically a decrease
in static pressure of only 0.5 inches can
reduce NC level by approximately 2 or
3 in the occupied space.
Free Cooling Opportunities and
Alternatives
Free cooling is available with either
airside or waterside economizers. The
advantages and disadvantages of each
type are listed as follows:
Waterside Economizer
The waterside economizer substantially
reduces the compressor energy
requirements. The waterside
economizer uses the cooling water
before it enters the condensers. The
waterside economizer does not require
additional equipment room space since
the coils are contained within the overall
unit dimensions.
The disadvantages include higher
airside pressure drop and a higher head
on condenser water pumps.
The coils may be mechanically
cleanable (optional) for ease in
maintenance versus expensive and
difficult chemical cleaning methods.
Airside Economizer
The airside economizer substantially
reduces compressor, cooling tower, and
condenser water pump energy
requirements. Fresh air is used for free
cooling. It also reduces tower makeup
water needs and related water
treatment.
The disadvantages include the need for
building barometric control, additional
air shafts, and locating the mechanical
room and self-contained unit toward an
exterior wall to minimize ductwork
requirements. The airside economizer
will require additional mechanical room
space.
Isolation Recommendations
Unit
The Trane unit is internally isolated so
that external isolation may not be
required. The incremental cost of
isolation is small in comparison to the
consequences of installed isolation
problems. Therefore, when in doubt,
external isolation should be used.
Ductwork
Design duct connections to the unit
using a flexible material. Consult local
codes for the material of the flexible
duct if a fire hazard could exist.
8
Piping Connections
Rubber isolator connectors are
recommended for condenser piping to
prevent vibration transmission to or
from the building plumbing. The Trane
unit is internally isolated and may not
require this additional expense.
However, do not forget to design proper
system vibration isolation to prevent
vibration transmission from the building
plumbing to the unit. Also be sure that
the drain line is properly isolated.
Condenser Water Piping
Location and Arrangement
Provide at least 24 inches of clearance
between the piping and the unit for
service. Place the risers away from the
side of the unit if possible. Be sure to
allow sufficient space for valves and
unions between the piping and the selfcontained unit. Condenser piping should
be laid out in reverse returns to help
balance the system. This is
accomplished by equalizing the length of
supply and return pipes. Multistory
buildings may use a direct return
system with balancing valves at each
floor. All heat exchangers and most
cooling tower piping should be installed
below the sump operating water level in
order to prevent overflow when unit
and/or the system is shut down.
Application
Considerations
Recommended Pump Location
Pump location is preferred downstream
of the cooling tower and upstream of
the self-contained unit. This provides
smoother and more stable unit
operation.
Figure AC-3 —Typical Piping Arrangement for Direct Return System
When the tower and pump are both
roof mounted, be sure to provide the
necessary net positive suction head
pressure to prevent cavitation. The
tower can be raised or the pump can be
submerged in a sump to provide the
positive suction. A standby pump is
recommended to avoid a complete
system shutdown in the event of an
on-line pump failure.
Several partial capacity pumps or
variable speed pumps may be used.
Review the economics of these
alternate pumping options.
Strainers and Water Treatment
Water strainers located at the inlet to
each unit are a recommended must.
Be sure to specify a water basket
strainer to avoid incorrect application
of a stream strainer. Untreated or
poorly treated water may result in
equipment damage. Consult a water
treatment specialist for treatment
recommendations.
Isolation Valves
Install isolation valves at each unit
before the strainer and after the
condenser. This allows periodic
servicing of the unit or strainer while
allowing other units in the system to
remain in operation.
Pressure Gauges
Install pressure gauges on the inlet and
outlet of the self-contained unit. It is
recommended that the gauge’s scale is
selected so that the design operating
point of the self-contained unit is
approximately mid-scale.
Thermometers
Thermometers are recommended on
the inlet and outlet of the condenser
water lines to each unit for system
analysis. The recommended
temperature range for the
thermometer is 40 to 140 F.
A 2 F temperature increment is
recommended.
Drains
The unit condensate drain is internally
trapped to offset the pressure
differential that exists when the fan is
operating. The low point of the floor of
the mechanical equipment room should
have a trapped drain for collection of
water from cleaning operations.
9
Application
Considerations
Condensing Pressure Control
(Water-Cooled condensers)
In many cases, a condensing pressure
control valve is required for cold
condensing water applications below 54
F (12.2 C) but above 35 F (1.7 C). Any
unit with water side valves configured
for variable flow has the ability of
modulating water flow to maintain a
user defined condensing temperature. It
should be noted that in order to utilize
this feature, the building water system
must be capable of operating at
reduced water flow rates through the
self-contained units. It is imperative that
variable volume pumps or an external
bypass is installed in the water
distribution system.
Waterside Economizer Flow Control
Units equipped with waterside
economizer control valves can be set up
for variable or constant water flow.
Constant water flow setup is intended
for use on water systems that are not
capable of unloading water supply to
the unit. The economizer and condenser
valves will operate in complement to
one another to provide continuous
water flow.
Variable water flow setup is intended for
use with water flow systems that can
take advantage of pump unloading for
the purpose of energy savings. Since
water flow will be restricted during noncooling operation, part load
economizing, or condensing
temperature control, it is imperative that
variable volume pumps or an external
bypass is installed in the water
distribution system.
Unit Operating Limits
Airflow
The minimum recommended airflow for
proper VAV system staging and
temperature control is approximately
35 percent of nominal design airflow.
Use appropriate minimum settings on
the VAV boxes to ensure that the selfcontained unit is not operating in a surge
condition. Continuous operation in a
surge condition can cause a fan failure.
Check with your local Trane sales office
for confirmation of acceptability of low
airflow operating conditions.
Fixed pitch sheaves are used on the
Trane unit. Air balancing adjustments
are accomplished by obtaining alternate
fixed pitch sheaves selections available
from the local Trane sales office.
Water Flow
Use 3 gpm/ton for optimum unit
capacity and efficiency. However, 2.5 or
2 gpm/ton may yield significant
pumping energy and piping cost
reductions. These reduced water flows
may have only a one or two percent
impact on the self-contained unit
capacity and efficiency. Specific water
flow ranges are included in the data
tables in this catalog.
Probe and Sensor Wiring
Requirements
Static Pressure Probe
Locate the static pressure probe about
two-thirds to three-fourths of the way
down the longest duct run. Stay
approximately 10 duct diameters
downstream and 2 duct diameters
upstream of any major interferences,
turns or changes in duct diameter.
Pneumatic tubing lengths between the
sensor and regulator should not exceed
250 feet for 1/4-inch OD or 500 feet for
3
/8 -inch OD tubing.
Choose a static pressure setpoint at the
lowest level that meets customer/code
requirements for air quantity and
quality. A lower static pressure setpoint
reduces fan energy requirements and
improves acoustic performance.
Wiring Requirements for Optional
Sensors
Wiring requirements for the zone
temperature remote reset, supply air
reset, and morning warmup optional
temperature sensors are all NEMA
class II. This is economical low voltage
(30 volts maximum) wiring.
Figure AC-3 —Waterside economizer piping
10
Application
Considerations
CCRB Air-Cooled Condenser
Unit Location
Unobstructed flow of condenser air is
essential to maintaining capacity and
operating efficiency. When determining
unit placement, careful consideration
must be given to assure a sufficient flow
of air across the condenser coils. Two
detrimental conditions must be avoided:
warm air recirculation and coil
starvation.
Both warm air recirculation and coil
starvation cause reductions in unit
efficiency and capacity because of the
higher head pressure associated with
them. In more severe cases, nuisance
unit shutdowns will result from
excessive head pressures.
Clearance
Vertical condenser air discharge must
be unobstructed. While it is difficult to
predict the degree of warm air
recirculation, a unit installed with a
ceiling or other obstruction above it may
experience a decrease in capacity and
the maximum ambient operation will be
reduced. Nuisance high head pressure
trip-outs may also occur.
The inlet to the coil must also be
unobstructed. A unit installed closer
than the minimum recommended
distance to a wall or other vertical riser
may experience a combination of coil
starvation and warm air recirculation,
resulting in unit capacity and efficiency
reductions, as well as possible
excessive head pressures. The
recommended lateral distances are
listed in the Dimensional Data section.
11
Ambient Limitations
Standard ambient control allows
operation down to 45 F (7.2 C) with
cycling of condenser fans. Units with the
low ambient option are capable of
starting and operating in ambient
temperatures down to 0 F (-17.8 C).
Optional low ambient units use a
condenser fan damper arrangement
that controls condenser capacity by
modulating in response to saturated
condenser temperature.
Maximum cataloged ambient
temperature operation of a standard
condenser is 115 F (46.1 C). Operation
at design ambient above 115 F can
result in excessive head pressures. For
operation above 115 F, contact the local
Trane sales office.
Selection
Procedure
Following is an example selection for a
standard applied water-cooled selfcontained at particular operating
conditions. All final selections should be
made using TOPSS™ (Trane Official
Product Selection System).
Unit Capacities
1
Determine entering air temperature dry
bulb and wet bulb and entering water
temperature.
2
Refer to Tables PD-4 through PD-43 to
find gross total capacity and gross
sensible capacity and gpm of the unit
that best meets capacity requirements.
3
Apply the cfm correction factors from
the capacity correction factor Table
PD-1 (page 20) to determine gross total
and gross sensible capacities at desired
cfm.
4
Multiply condenser water delta T by
the total capacity cfm correction factor
to determine new condenser water
delta T.
5
Using design cfm, determine static air
pressure drops for accessories from the
air pressure drop Charts PD-1 through
PD-16. Add accessory static pressure
drops to external supply and return
static air pressure drops. Use the total
air pressure drop to determine rpm and
brake horsepower requirements from
the appropriate fan curve. NOTE: The
fan curves include refrigerant coil and
internal cabinet static loses.
6
Calculate supply fan motor heat by
using the following equation:
Fan motor heat (MBh) = 2.8 x fan motor
brake horsepower
7
Determine net total capacity and net
sensible capacity by subtracting fan
motor heat from gross total capacity
and gross sensible capacity.
8
Refer to Trane psychometric chart to
determine leaving air temperatures.
Waterside Economizer Capacity
1
After determining that the unit will meet
the required capacity with the
mechanical cooling, then the waterside
economizer capacity can be determined
by referring to the appropriate two-row
(low capacity) or four-row (high
capacity) waterside economizer
capacity tables listed for each unit size.
2
Determine entering air temperature dry
bulb and wet bulb and condenser water
flow (gpm) and entering water
temperature to the waterside
economizer coil.
3
Refer to the appropriate waterside
economizer table to find gross total
capacity and gross sensible capacity
and the leaving water temperature.
4
Apply the cfm correction factor for the
waterside economizer from the
appropriate table to determine the
gross total and sensible capacities at
desired cfm.
5
Multiply the condenser water delta T by
the total capacity cfm correction factor
to determine the new delta T.
6
Calculate supply fan motor heat by
using the following equation:
Fan motor heat (MBh) = 2.8 x fan motor
brake horsepower
7
Determine net total capacity and net
sensible capacity by subtracting fan
motor heat from gross total capacity
and gross sensible capacity.
8
Refer to Trane psychometric chart to
determine leaving air temperatures.
12
Selection Example
Design Conditions
Total gross capacity required =
420 MBh = 35.2 Tons
Total sensible capacity required =
315 MBh
Entering air temperature = 80/67
Entering water temperature = 85
Leaving water temperature = 95
Airflow = 14840 cfm at 2.5-inch
duct static pressure
Unit to include:
Inlet guide vanes
Waterside economizer
Medium velocity throwaway filters
Unit Selection
Tentatively select a 35 ton unit
Model SCWD 35.
Refer to Table PD-19 (page 39) to obtain
gross total and sensible unit capacities,
and gpm at the design conditions:
Total capacity = 419 MBh
Sensible capacity = 309 MBh
Water flow = 105 gpm
Since the design cfm is greater than the
nominal cfm, the capacities and
condenser water delta T must be
adjusted to reflect the higher cfm:
design cfm 14840 +6% from nom. cfm
nominal
14000
cfm
Selection
Procedure
Refer to Table PD-1 (page 18) to obtain
the capacity correction factors for +6%
of nominal cfm:
Cooling capacity multiplier = 1.009
Sensible capacity multiplier = 1.027
Multiply the capacities by the correction
factors:
419 MBh x 1.009 = 422.8 MBh
309 MBh x 1.027 = 317.3 MBh
The SCWD 35 meets the total and
sensible design requirements.
Multiply the delta T of 9.7 F, by the
cooling capacity correction factor of
1.009 to obtain new delta T of 9.79 and
add this to the entering water
temperature to obtain the actual leaving
water temperature 94.79 F.
Determine static air pressure drops
through the accessories at the design
cfm from Chart PD-3 (page 21):
4-row waterside economizer = 0.37 in.
Medium velocity filters = 0.28 in.
add this to the 2.5 inch duct static
pressure for a total external static
pressure of 3.15 inches.
Refer to the fan curve with inlet guide
vanes on Chart PD-36 (page 39) to
determine approximate brake
horsepower and fan rpm:
Fan brake horsepower = 16 bhp
Fan rpm = 1020 rpm
13
Determine net capacities by subtracting
fan motor heat from gross capacities:
2.8 x 16 bhp = 44.8 MBh
Net total capacity = 422.8 MBh 44.8 MBh = 378.0 MBh
Net sensible capacity = 317.3 MBh 44.8 MBh = 272.5 MBh
Determine waterside economizer
capacity by referring to Table PD-17
(page 38). Use entering air of 80/67 and
entering water temperature of 55 deg F
at 105 gpm. The table provides a gross
total capacity of 282.1 MBh and gross
sensible capacity of 277.2 MBh and
60.4 deg F leaving water temperature
at nominal cfm.
Determine gross capacities at design
cfm by applying the cfm correction
factors from waterside economizer
from Table PD-1 (page 21). Use the
following correction factors:
282.1 MBh x 1.009 = 284.6 MBh
277.2 MBh x 1.027 = 284.7 MBh
Apply the cooling correction factor to
the water delta T to determine the new
delta T of 5.45 F.
Determine net capacities by subtracting
fan motor heat for net total capacity of
239.8 MBh and net sensible capacities
of 239.9 MBh.
Model
Number
Description
S C W D 020 4 2 PO A B 2 10
065
B A 1 0 1 0 A A C F A 1 1 0 U
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
Digit 1 - Unit Model
S = Self Contained
Digit 2 - Unit Type
C = Commercial
I = Industrial
Digit 3 - Condenser Medium
W = Water-Cooled
R = Air-Cooled
Digit 4 - Development Sequence
D=D
Digit 5, 6, 7 - Unit Nominal Capacity
20 = 20 Tons (Water or Air)
22 = 22 Tons (Water Only)
25 = 25 Tons (Water or Air)
29 = 29 Tons (Water or Air)
30 = 30 Tons (Air Only)
32 = 32 Tons (Water Only)
35 = 35 Tons (Water or Air)
38 = 38 Tons (Water Only)
40 = 40 Tons (Air Only)
42 = 42 Tons (Water Only)
46 = 46 Tons (Water Only)
50 = 50 Tons (Air Only)
52 = 52 Tons (Water Only)
58 = 58 Tons (Water Only)
60 = 60 Tons (Air Only)
65 = 65 Tons (Water Only)
72 = 72 Tons (Water Only)
80 = 80 Tons (Water Only)
Digit 8 - Unit Voltage
6 = 200 Volt/60 Hz/3 ph
3 = 230 Volt/60 Hz/3 ph
4 = 460 Volt/60 Hz/3 ph
5 = 575 Volt/60 Hz/3 ph
Digit 9 - Air Volume/Temp Control
1 = IGV and Supply Air Temp Ctrl
2 = Inverter and Supply Air Temp Ctrl
3 = Inverter w/ Bypass and Supply
Air Temp Ctrl
4 = Constant Volume w/ Zone Temp Cool
5 =Constant Volume w/ Zone Temp
Heat/Cool
6 = Constant Volume w/ Supply Air
Temp Ctrl
Digit 10, 11 - Design Sequence
PO = “P” Design
Digit 12 - Unit Construction
A = Vertical Discharge
B = Vertical Discharge with Double Wall
Digit 13 - Plenum Type (Ship Separate)
A = 45” Plenum w/ Factory Cut Holes
B = Std Plenum w/ Factory Cut Holes
C = Low Plenum w/ Factory Cut Holes
D = 45” Plenum w/ Field Cut Holes
E = Std Plenum w/ Field Cut Holes
F = Low Plenum w/ Field Cut Holes
0 = None
Digit 14 - Motor Type
1 = High Eff. ODP Motor
2 = ODP Motor
3 = Totally Enclosed Motor
4 = Mill and Chem spec motor
5 = Super High Eff. Motor
Digit 15, 16 - Motor HP
05 = 5 HP Motor
07 = 7.5 HP Motor
10 = 10 HP Motor
15 = 15 HP Motor
20 = 20 HP Motor
25 = 25 HP Motor
30 = 30 HP Motor
40 = 40 HP Motor
50 = 50 HP Motor (460V Only)
Digit 17, 18, 19 - Fan RPM
040 = 400 rpm
045 = 450 rpm
050 = 500 rpm
055 = 550 rpm
060 = 600 rpm
065 = 650 rpm
070 = 700 rpm
075 = 750 rpm
080 = 800 rpm
085 = 850 rpm
090 = 900 rpm
095 = 950 rpm
100 = 1000 rpm
105 = 1050 rpm
110 = 1100 rpm
115 = 1150 rpm
120 = 1200 rpm
125 = 1250 rpm
130 = 1300 rpm
135 = 1350 rpm
140 = 1400 rpm
14
145 = 1450 rpm
150 = 1500 rpm
Digit 20 - Filter Type
A = Construction Throwaway
B = Medium Efficiency Throwaway
D = Construction Throwaway w/Dirty
Filter Switch
E = Medium Efficiency Throwaway w/
Dirty Filter Sensor
Digit 21 - Heating Coil
A = Steam Coil (Left Hand)
H = Hot Water Coil (Left Hand)
E = Electric Heat (1 Stage)
0 = None
Digit 22 - Unit Finish
1 = Paint - Executive Beige
2 = Phenolic Coating
3 = Phenolic Coating w/ Finish Coat
0 = None
Digit 23- Unit Isolators
A = Spring
B = Isolator Pads
0 = None
Digit 24 - Unit Connection
1 = Disconnect Switch
2 = Terminal Block
Digit 25 - Coil Options
A = Phenolic Coat w/Silver Solder
0 = None
Digit 26 - Drain Pan Type
A = Galvanized Sloped
B = Stainless Steel Sloped
Digit 27 - Economizer Type
A = Airside w/Controls
B = Airside Control Interface
W = Waterside Mechanical Clean Full
Capacity (4-row)
L = Waterside Mechanical Clean Low
Capacity (2-row)
C = Waterside Chemical Clean Full
Capacity(4-row)
G = Waterside Chemical Clean Low
Capacity (2-row)
0 = None
Model
Number
Description
Digit 28 - Waterside Valves
1 = Modulating Energy Saving
2 = Modulating Standard Econ.
3 = Condenser Pressure Control
0 = None
Digit 29 - Water Piping
A = Left Hand Piping w/Flow Switch
B = Left Hand Piping
C = Left Hand w/ Flow Switch and
Silver Solder
D = Left Hand w/o Flow Switch and
Silver Solder
0 = None
Digit 30 - Condenser Tube Type
A = Standard Condenser Tubes
B = 90/10 CuNi Condenser Tubes
0 = Without Condensers
(Air-cooled Only)
Digit 31 - Compressor Service Valves
1 = With Service Valves
0 = Without Service Valves
Digit 32 - System Control
1 = Timeclock
2 = Night Heat Morning Warmup
3 = Programmable Night Heat Morning
Warmup
4 = Generic Relay Package
5 = Timeclock w/ ICS
6 = Night Heat Morning Warmup w/ ICS
7 = Programmable Night Heat Morning
Warmup w/ICS
8 = Generic Relay Package w/ICS
0 = None
Digit 33 - Control Options
1 = Mixed Air Temperature Protection
2 = Supply Air Temperature Adjustment
3 =Mixed Air Temperature/Supply Air
Temperature Adjustment
0 = None
Digit 34 - Agency
U = UL Agency Listed
0 = None
C
1
C
2
R
3
B
4
Digit 1 - Unit Model
C = Condenser
Digit 2 - Unit Type
C = Commercial
I = Industrial
Digit 3 - Condenser Medium
R = Air Cooled Condenser
Digit 4 - Development Sequence
B=B
Digit 5, 6, 7 - Nominal Capacity
020 = 20 Tons
029 = 29 Tons
032 = 32 Tons
035 = 35 Tons
040 = 40 Tons
050 = 50 Tons
060 = 60 Tons
020
567
4
8
A
9
BO
10 11
1
12
Digit 8 - Unit Voltage
3 = 230Volt/60 Hz/3 ph
4 = 460 Volt/60 Hz/3 ph
5 = 575 Volt/60 Hz/3 ph
7 = 200 Volt/60 Hz/3 ph
Digit 9 - Low Ambient Option
0 = Without Low Ambient Option
A = Low Ambient Control Dampers
Digit 10, 11 - Design Sequence
BO = “B” Design Sequence
Digit 12 - Unit Finish
1 = Paint (Executive Beige)
2 = Phenolic Coating
3 = Phenolic Coating with
Finish Coat
4 = Unpainted Unit
15
A
13
0
14
0
15
T
16
Digit 13 - Coil Options
A = Non-Coated Aluminum
C = Phenolic Coated Aluminum
Digit 14 - Unit Isolators
0 = Without Isolators
A = Spring Isolators
B = Isolator Pads
Digit 15 - Panels
0 = Without Louvered Panels
1 = Louvered Panels
Digit 16 - Agency
0 = None
T = UL Agency Listed
General
Data
SCWD
20-38 Tons
Table GD-1 — SCWD Water-Cooled Self-Contained - 20-38 Tons
Unit Size
20
Compressor Data
Quantity
2
Nominal Ton/Comp
10
Circuits
2
Evaporator Coil Data
Rows
2
Sq. Ft.
21.81
Sq. m
2.03
FPF
144
Condenser Data
Minimum GPM w/o Econ
36
Minimum liters / sec. w/o Econ
2.27
Minimum GPM w/ Econ
41
Minimum liters / sec. w/ Econ
2.59
Maximum GPM
80
Maximum liters / sec.
5.05
Evaporator Fan Data
Quantity
1
Size (Dia. - inches)
16.5"
Size (Dia. - mm)
419.1
Minimum HP
5
Minimum kW
3.73
Maximum HP
20
Maximum kW
14.91
Minimum Design CFM
6325
Minimum Design liter / sec.
2985
Maximum Design CFM
8500
Maximum Design liter / sec.
4012
General Data
Gross EER
13.1
Refrigerant Charge - lbs. R-22
Circuit A
24
Circuit B
24
Circuit C
Circuit D
Refrigererant Charge - kg R-22
Circuit A
10.9
Circuit B
10.9
Circuit C
Circuit D
Capacity Steps - %
100/53/0
Filter Data
Quantity
8
Size (inches)
20x18x2
Size (mm)
508 X 457 X 51
Quantity
4
Size (inches)
20x20x2
Size (mm)
508 X 508 X 51
22
25
29
32
35
38
2
10
2
2
10
2
1/1
15/10
2
1/1
15/10
2
3
10
3
3
10
3
2
21.81
2.03
144
3
21.81
2.03
144
2
29.98
2.79
144
4
29.98
2.79
144
3
31.35
2.91
120
4
31.35
2.91
144
36
2.27
41
2.59
80
5.05
36
2.27
41
2.59
80
5.05
46
2.9
60
3.79
102
6.44
46
2.9
60
3.79
102
6.44
54
3.41
65
4.1
119
7.51
54
3.41
65
4.1
119
7.51
1
16.5"
419.1
5
3.73
20
14.91
6325
2985
9350
4413
1
16.5"
419.1
5
3.73
20
14.91
6500
3068
10625
5014
1
18.25"
463.6
5
3.73
25
18.64
8700
4106
12325
5817
1
18.25"
463.6
5
3.73
25
18.64
8700
4106
13600
6418
1
20"
508
5
3.73
25
18.64
9100
4295
14875
7020
1
20"
508
5
3.73
25
18.64
9880
4663
16150
7622
12.8
12.2
13.1
12.7
13.0
13.1
24
24
-
24
24
-
28
24
-
30
25
-
24
24
24
-
25
25
25
-
10.9
10.9
100/53/0
10.9
10.9
100/53/0
12.7
10.9
100/62/39/0
13.6
11.3
10.9
100/59/39/0
10.9
10.9
11.3
100/65/31/0
11.3
11.3
100/65/30/0
8
20x18x2
508 X 457 X 51
4
20x20x2
508 X 508 X 51
8
20x18x2
508 X 457 X 51
4
20x20x2
508 X 508 X 51
8
20x18x2
508 X 457 X 51
4
20x20x2
508 X 508 X 51
8
20x18x2
508 X 457 X 51
4
20x20x2
508 X 508 X 51
8
20x18x2
508 X 457 X 51
4
20x20x2
508 X 508 X 51
8
20x18x2
508 X 457 X 51
4
20x20x2
508 X 508 X 51
Notes:
1. Compressors are Trane 3D® scroll.
2. EER is rated in accordance to the ARI Standard 360-86 for large unitary equipment up to 20 tons. Based on 80/67 F (26.7/19.4 C) to the evaporator coil, nominal airflow and 85-95 F
(29.4/35 C) condenser water.
3. All units operate with R-22. Units ships with full operating charge.
4. Maximum cfm limits are set to prevent moisture carryover on the evaporator coil.
5. Minimum cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.
6. Filter sizes are for units without hot water or steam heating coils
16
General
Data
SCWD
42-80 Tons
Table GD-2 — SCWD Water-Cooled Self-Contained - 42-80 Tons
Unit Size
42
Compressor Data
Quantity
2/1
Nominal Ton/Comp
10/15
Circuits
3
Evaporator Coil Data
Rows
3
Sq. Ft.
38.57
Sq. m
3.58
FPF
144
Condenser Data
Minimum GPM w/o Econ
64
Minimum liters / sec. w/o Econ
4.04
Minimum GPM w/ Econ
64
Minimum liters / sec. w/ Econ
4.04
Maximum GPM
142
Maximum liters / sec.
8.96
Evaporator Fan Data
Quantity
1
Size (Dia. - inches)
25"
Size (Dia. - mm)
635
Minimum HP
7.5
Minimum kW
5.59
Maximum HP
30
Maximum kW
22.37
Minimum Design CFM
11200
Minimum Design liter / sec.
5286
Maximum Design CFM
17850
Maximum Design liter / sec.
8424
General Data
Gross EER
13.3
Refrigererant Charge - lbs. R-22
Circuit A
28
Circuit B
24
Circuit C
24
Circuit D
Refrigerant Charge - kg R-22
Circuit A
12.7
Circuit B
10.9
Circuit C
10.9
Circuit D
Capacity Steps - %
100/71/43/26/0
Filter Data
Quantity
4
Size (inches)
16x20x2
Size (mm)
406 X 508 X 51
Quantity
8
Size (inches)
16x25x2
Size (mm)
406 X 635 X 51
Quantity
2
Size
20x20x2
Size (mm)
508 X 508 X 51
Quantity
4
Size
20x25x2
Size (mm)
508 X 635 X 51
46
52
58
65
72
80
2/1
10/15
3
3
15
3
3
15
3
3/1
15/10
4
3/1
15/10
4
4
15
4
4
38.57
3.58
144
2
49.09
4.56
144
4
49.09
4.56
144
3
49.09
4.56
144
4
49.09
4.56
144
6
49.09
4.56
144
64
4.04
64
4.04
142
8.96
84
5.3
84
5.3
186
11.73
84
5.3
84
5.3
186
11.73
102
6.43
102
6.43
226
14.26
102
6.43
102
6.43
226
14.26
112
7.07
112
7.07
248
15.65
1
25"
635
7.5
5.59
30
22.37
11960
5645
19550
9227
1
25"
635
10
7.46
50
37.29
14250
6725
22100
10430
1
25"
635
10
7.46
50
37.29
15080
7117
24650
11634
1
27.5"
698.5
10
7.46
50
37.29
16900
7976
27625
13038
1
27.5"
698.5
10
7.46
50
37.29
18700
8825
29800
14064
1
27.5"
698.5
10
7.46
50
37.29
20800
9817
29800
14064
13.2
12.0
12.4
11.9
11.5
11.4
30
25
25
-
28
28
28
-
30
30
30
-
28
28
28
24
30
30
30
25
32
32
32
32
13.6
11.3
11.3
100/70/41/30/0
12.7
12.7
12.7
100/65/32/0
13.6
13.6
13.6
100/65/30/0
12.7
12.7
12.7
10.9
100/71/44/24/0
13.6
13.6
13.6
11.3
100/71/43/23/0
14.5
14.5
14.5
14.5
100/73/46/20/0
4
16x20x2
406 X 508 X 51
8
16x25x2
406 X 635 X 51
2
20x20x2
508 X 508 X 51
4
20x25x2
508 X 635 X 51
4
16x20x2
406 X 508 X 51
8
16x25x2
406 X 635 X 51
2
20x20x2
508 X 508 X 51
4
20x25x2
508 X 635 X 51
4
16x20x2
406 X 508 X 51
8
16x25x2
406 X 635 X 51
2
20x20x2
508 X 508 X 51
4
20x25x2
508 X 635 X 51
4
16x20x2
406 X 508 X 51
8
16x25x2
406 X 635 X 51
2
20x20x2
508 X 508 X 51
4
20x25x2
508 X 635 X 51
4
16x20x2
406 X 508 X 51
8
16x25x2
406 X 635 X 51
2
20x20x2
508 X 508 X 51
4
20x25x2
508 X 635 X 51
4
16x20x2
406 X 508 X 51
8
16x25x2
406 X 635 X 51
2
20x20x2
508 X 508 X 51
4
20x25x2
508 X 635 X 51
Notes:
1. Compressors are Trane 3D® scroll.
2. EER is rated in accordance to the ARI Standard 360-86 for large unitary equipment up to 20 tons. Based on 80/67 F (26.7/19.4 C) to the evaporator coil, nominal airflow and 85-95 F
(29.4/35 C) condenser water.
3. All units operate with R-22. Units ships with full operating charge.
4. Maximum cfm limits are set to prevent moisture carryover on the evaporator coil.
5. Minimum cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.
6. Filter sizes are for units without hot water or steam heating coils
17
General
Data
Table GD-3 — SCRD Air-Cooled Self-Contained
Unit Size
20
Compressor Data
Quantity
2
Nominal Ton/Comp
10
Circuits
2
Evaporator Coil Data
Rows
3
Sq. Ft.
21.81
Sq. m
2.03
FPF
144
Evaporator Fan Data
Quantity
1
Size (Dia. - inches)
16.5"
Size (Dia. - mm)
419.1
Minimum HP
5
Minimum kW
3.73
Maximum HP
20
Maximum kW
14.91
Minimum Design CFM
6500
Minimum Design liters / sec.
3068
Maximum Design CFM
10625
Maximum Design liters / sec.
5014
General Data
Gross EER
10.6
Refrigerant Charge - lbs. R-22
57.2
Refrigerant Charge - kg R-22
25.9
Capacity Steps - %
100/53/0
Filter Data
Quantity
8
Size (inches)
20x18x2
Size (mm)
508x457x51
Quantity
4
Size (inches)
20x20x2
Size (mm)
508x508x51
Quantity
Size (inches)
Size (mm)
Quantity
Size
Size (mm)
CCRB Unit Match
20
SCRD
25
29
30
35
40
50
60
1/1
15/10
2
1/1
15/10
2
3
10
2
3
10
2
2/1
10/15
2
3
15
2
4
15
2
2
29.98
2.79
144
4
29.98
2.79
144
3
31.35
2.91
120
4
31.35
2.91
144
4
38.57
3.58
144
4
49.09
4.56
144
6
49.09
4.56
144
1
18.25"
463.6
5
3.73
25
18.64
8700
4106
12325
5817
1
18.25"
463.6
5
3.73
25
18.64
8700
4106
13600
6418
1
20"
508
5
3.73
25
18.64
9100
4295
14875
7020
1
20"
508
5
3.73
25
18.64
9880
4663
16150
7622
1
25"
635
7.5
5.59
40
22.37
11960
5645
19550
9227
1
25"
635
10
7.46
40
37.29
15080
7117
24650
11634
1
27.5"
698.5
10
7.46
50
37.29
20800
9817
29800
14064
10.7
66.7
30.3
100/62/39/0
xx
72
32.7
100/59/39/0
10.7
57
25.9
100/65/31/0
10.6
57.2
25.9
100/65/30/0
10.9
66.7
30.3
100/70/41/30/0
10.7
72
32.7
100/65/30/0
10.3
72
32.7
100/73/46/20/0
8
20x18x2
508x457x51
4
20x20x2
508x508x51
8
20x18x2
508x457x51
4
20x20x2
508x508x51
8
20x18x2
508x457x51
4
20x20x2
508x508x51
8
20x18x2
508x457x51
4
20x20x2
508x508x51
29
35
508x635x51
35
4
16x20x2
406x508x51
8
16x25x2
406x635x51
2
20x20x2
508x508x51
4
20x25x2
508x635x51
50
4
16x20x2
406x508x51
8
16x25x2
406x635x51
2
20x20x2
508x508x51
4
20x25x2
29
4
16x20x2
406x508x51
8
16x25x2
406x635x51
2
20x20x2
508x508x51
4
20x25x2
508x635x51
40
60
Notes:
1. Compressors are Trane 3D® scroll.
2. EER is rated in accordance to the ARI Standard 360-86 for large unitary equipment up to 20 tons. Based on 80/67 F (26.7/19.4 C) to the evaporator coil, nominal airflow, and 95 F ambient.
3. All units operate with R-22. Units ships with a dry nitrogen holding charge.
4. Maximum cfm limits are set to prevent moisture carryover on the evaporator coil.
5. Minimum cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.
6. Filter sizes are for units without hot water or steam heating coils
18
General
Data
Table GD-4 — CCRB Remote Air-Cooled Condenser
Unit Size
20
Gross Heat Rejection (MBH)
493
Gross Heat Rejection (kW)
144.5
Condenser Fan Data
Number/Type
4/Prop
Size (inches)
26
Size (mm)
660.4
Fan Drive
Direct
No. of Motors/HP ea.
4/1
Nominal CFM
18,800
Nominal (liters / sec)
8873
Condenser Coil Data
Circuit 1 Size (in.)
1/46x71
Circuit 1 Size (mm)
1/1168x1803
Circuit 2 No./Size (in.)
1/46x71
Circuit 2 No./Size (mm)
1/1168x1803
Face Area (sq. ft.)
45.4
Face Area (sq.m)
4.2
Rows/fpf
4/144
General Data
No. of Refrigerant Circuits
2
Operating Charge - lbs. R-22
36/36
Operating Charge - kg R-22
16.3/16.3
Cond. Storage Cap. - lbs. R-22
44/44
Cond. Storage Cap. - kg R-22
20/20
Ambient Temperature Operating Range
Standard Ambient (F)
50-115
Standard Ambient (C)
10 - 46.1
Low Ambient Option (F)
0-115
Low Ambient Option (C)
-17.8 - 46.1
CCRB and
SCWD/SCRD
Heating Coil
29
538
157.7
35
640
187.6
40
725
212.5
50
1040
304.8
60
1122
328.8
4/Prop
26
660.4
Direct
4/1
21,200
10005
6/Prop
26
660.4
Direct
6/1
35,600
16801
6/Prop
26
660.4
Direct
6/1
39,800
18784
8/Prop
26
660.4
Direct
8/1
46,200
21804
8/Prop
26
660.4
Direct
8/1
56,400
26618
1/64x71
1/1626x1803
1/46x71
1/1168x1803
54.2
5
4/144
2/46x71
2/1168x1803
1/46x71
1/1168x1803
68
6.3
4/144
2/46x71
2/1168x1803
1/64x71
1/1626x1803
76.9
7.1
4/144
2/64x71
2/1626x1803
1/64x71
1/1626x1803
94.7
8.8
4/144
2/64x71
2/1626x1803
2/64x71
2/1626x1803
126.2
11.7
4/144
2
36/58
26.3/16.3
44/61
20/27.7
2
72/36
32.7/16.3
44/88
20/39.9
2
94/36
42.6/16.3
105/44
47.6/20
2
115/58
52.2/26.3
122/61
55.3/27.7
2
115/125
52.2/56.7
122/132
55.3/59.9
50-115
10 - 46.1
0-115
-17.8 - 46.1
50-115
10 - 46.1
0-115
-17.8 - 46.1
50-115
10 - 46.1
0-115
-17.8 - 46.1
50-115
10 - 46.1
0-115
-17.8 - 46.1
50-115
10 - 46.1
0-115
-17.8 - 46.1
Notes:
1. Gross Heat Rejection is at a 20 F (-6.7 C) ITD (Initial Temperature Difference) between condensing temperature and ambient air entering condenser (includes the effect of subcooling).
2. Operating charge is for entire unit, including 100 feet of interconnecting piping.
3. At conditions of 95 F (35 C), condenser is 95 percent full.
Table GD-5 — Heating Coil for Self-Contained
Unit Size
Steam Coil
Coil Type
Rows Rows
No./Size (inches)
No./Size (mm)
FPF
Hot Water Coil
Coil Type
Rows
No./Size (inches)
No./Size (mm)
FPF
Filter Data
Quantity
Size (inches)
Size (mm)
Quantity
Size (inches)
Size (mm)
Quantity
Size (inches)
Size (mm)
Quantity
Size (inches)
Size (mm)
Table GD-6 — SCRD/SCWD Refrigerant Circuits
SCWD 20 - 38
SCWD 42 - 80
SCRD 20 - 35
SCRD 40 - 60
NS
1
(2) 24x58
(2) 609.6x1473.2
42
NS
1
(2) 30x81
(2) 762x2057.4
42
NS
1
(2) 24x58
(2) 609.6x1473.2
42
NS
1
(2) 30x81
(2) 762x2057.4
42
WC
1
(2) 24x58
(2) 609.6x1473.2
80
WC
1
(2) 30x81
(2) 762x2057.4
80
WC
1
(2) 24x58
(2) 609.6x1473.2
80
WC
1
(2) 30x81
(2) 762x2057.4
80
4
20x18x2
508x457x51
8
20x20x2
508x508x51
4
16x20x2
406x508x51
8
16x25x2
406x635x51
2
20x20x2
508x508x51
4
20x25x2
508x635x51
4
20x18x2
508x457x51
8
20x20x2
508x508x51
4
16x20x2
406x508x51
8
16x25x2
406x635x51
2
20x20x2
508x508x51
4
20x25x2
508x635x51
Notes:
1. Hot water coils have Prima-Flo® fins without turbulators and steam heating coils have Sigma-Flo® fins without
turbulators.
2. For coil capacities , use TOPSS™ (Trane Official Product Selection System).
3. Full capacity coils consist of two coils stacked and piped in parallel.
19
A
B
C
D
20/22/25 Ton
10T
10T
20/32 Ton
15T
10T
35/38 Ton
10T
10T
10T
42/46 Ton
15T
10T
10T
52/58 Ton
15T
15T
15T
60/72 Ton
15T
15T
15T
10T
80 Ton
15T
15T
15T
15T
Note: This table depicts compressor location in unit,
plan view from left corner
Performance
Data
Table PD-1 — CFM Capacity Correction Table
DX Cooling
Waterside
Economizer
Cfm Compared
To Rated
Quanitity
-20%
-10%
Std
+3%
+6%
-20%
-10%
Std
+3%
+6%
Cooling
Capacity
Multiplier
0.970
0.985
1.000
1.005
1.009
0.970
0.985
1.000
1.005
1.009
Chart PD-2 — Airside Pressure Drop 20 - 38 Ton Airside Economizer
Chart PD-3 — Airside Pressure Drop 42 - 80 Ton Airside Economizer
20
Sensible
Capacity
Multiplier
0.910
0.955
1.000
1.014
1.027
0.910
0.955
1.000
1.014
1.027
Performance
Data
Airside
Pressure
Drop
Chart PD-4 — Airside Pressure Drop
SCWD 20, SCWD 22, SCWD 25, SCRD 20
Chart PD-5 — Airside Pressure Drop
SCWD 29, SCWD 32, SCRD 25, SCRD 29
Chart PD-6 — Airside Pressure Drop
SCWD 35, SCWD 38, SCRD 30, SCRD 35
Chart PD-7 — Airside Pressure Drop
SCWD 42, SCWD 46, SCRD 40
Notes:
1. Dashed line on construction filter curves indicates cfm where face velocity exceeds manufacturer’s recommended maximum of 300 fpm. After startup, construction filters must be
replaced with medium velocity or high velocity filters.
2. Air pressure drop through electric heat is 0.5 inches WC.
3. Refer to Page 24 and 25 for pressure drop through flexible horizontal discharge.
4. Refer to Page 23 for pressure drop through steam heating coils.
5. Airside pressure drops must be added to the unit external static pressure for proper fan horsepower determination.
21
Performance
Data
Chart PD-8 — Airside Pressure Drop
SCWD 52, SCWD 58, SCRD 50
Airside
Pressure
Drop
Chart PD-9 — Airside Pressure Drop
SCWD 65
Chart PD-11 — Airside Pressure Drop
SCWD 80, SCRD 60
Chart PD-10 — Airside Pressure Drop
SCWD 72
Notes:
1. Dashed line on construction filter curves indicates cfm where face velocity exceeds manufacturer’s recommended maximum of 300 fpm. After startup, construction filters must be replaced
with medium velocity or high velocity filters.
2. Air pressure drop through electric heat is 0.5 inches WC.
3. Refer to Page 24 and 25 for pressure drop through flexible horizontal discharge.
4. Refer to Page 23 for pressure drop through steam heating coils.
5. Airside pressure drops must be added to the unit external static pressure for proper fan horsepower determination.
22
Performance
Data
Airside
Pressure Drop
Heating Coils
Chart PD-12 — 20 to 80-Ton Units Steam Coil Box Airside Pressure Drop
For NS Coils
Note:
1. Airside pressure drops must be added to the unit external static pressure for
proper fan horsepower determination.
23
Performance
Data
Flexible
Horizontal
Discharge
Chart PD-13 — 20 to 38 Ton Unit Flexible Horizontal
Discharge Standard Height,
Airside Pressure Drop
Chart PD-14 — 42 to 80 Ton Unit Flexible Horizontal
Discharge Standard Height,
Airside Pressure Drop
Chart PD-15 — 20 to 38 Ton Unit Flexible Horizontal
Discharge Low Height,
Airside Pressure Drop
Chart PD-16 — 42 to 80 Ton Unit Flexible Horizontal
Discharge Low Height,
Airside Pressure Drop
Note: “Primary” refers to the side where the static pressure drop was measured. This
value must be added to the unit external static pressure for proper fan horsepower
determination.
24
Performance
Data
Flexible
Horizontal
Discharge
Chart PD-17 — 20 to 38-Tons 45-Inch Flexible Horizontal Discharge
Chart PD-18 — 42 to 80-Tons 45-Inch Flexible Horizontal Discharge
Note:
Air pressure drops must be added to the unit external static pressure for proper fan
horsepower determination.
25
Performance
Data
Waterside
Pressure
Drop
Chart PD-19 — Waterside Pressure Drop
SCWD 20, SCWD 22, SCWD 25
Chart PD-20 — Waterside Pressure Drop
SCWD 29, SCWD 32
Chart PD-21 — Waterside Pressure Drop
SCWD 35, SCWD 38
Chart PD-22 — Waterside Pressure Drop
SCWD 42, SCWD 46
Note: Each curve provides total water pressure drop through the entire unit including all accessories and internal valves and piping. Do not add curves together.
26
Performance
Data
Waterside
Pressure
Drop
Chart PD-23 — Waterside Pressure Drop
SCWD 52, SCWD 58
Chart PD-24 — Waterside Pressure Drop
SCWD 65
Chart PD-25 — Waterside Pressure Drop
SCWD 72
Chart PD-26 — Waterside Pressure Drop
SCWD 80
Note: Each curve provides total water pressure drop through the entire unit including all accessories and internal valves and piping. Do not add curves together.
27
Performance
Data
20 Ton
Water Cooled
Table PD-2 — SCWD 20 - Economizer Full Capacity - 8,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
Total
MBh
210.3
220.8
228.8
265.7
284.6
299.0
339.2
364.8
383.9
230.9
239.2
245.2
271.3
288.1
300.9
338.5
363.9
383.0
262.5
270.4
275.9
283.5
298.0
309.0
340.7
364.4
382.6
45 F
Sensible
MBh
189.3
193.7
197.1
160.4
167.9
173.7
133.9
143.3
150.5
226.2
234.5
240.6
204.6
211.3
216.5
176.3
185.8
193.1
262.5
270.4
275.9
251.3
257.1
261.6
219.3
228.2
235.1
Entering Water Temp
LWT
F
53.4
52.4
51.5
55.6
54.5
53.5
58.6
57.2
56.0
54.2
53.0
52.0
55.9
54.6
53.6
58.5
57.1
55.9
55.5
54.0
52.9
56.3
54.9
53.8
58.6
57.1
55.9
Total
MBh
132.5
136.2
138.9
155.2
164.4
171.8
221.4
238.3
251.4
165.6
170.2
173.5
171.1
178.2
183.7
222.0
238.0
250.6
198.6
204.1
208.0
199.2
204.8
208.8
230.6
244.2
255.1
55 F
Sensible
MBh
132.5
136.2
138.9
119.1
122.4
125.0
92.8
98.5
103.0
165.6
170.2
173.5
166.8
169.4
171.4
135.4
140.8
145.1
198.6
204.1
208.0
199.2
204.8
208.8
180.5
185.1
188.8
LWT
F
60.3
59.5
59.0
61.2
60.5
59.9
63.9
62.9
62.2
61.6
60.7
60.0
61.8
60.9
60.2
63.9
62.9
62.2
62.9
61.8
60.9
63.0
61.8
61.0
64.2
63.1
62.3
55 F
Sensible
MBh
92.8
96.1
98.4
88.3
90.3
92.0
64.5
68.0
70.7
116.1
120.1
123.0
111.3
115.7
119.1
98.8
102.2
104.8
139.3
144.1
147.6
139.6
144.4
147.9
134.6
137.4
139.7
LWT
F
58.7
58.2
57.8
59.1
58.6
58.2
60.9
60.2
59.7
59.6
59.0
58.5
59.7
59.0
58.5
60.8
60.2
59.7
60.6
59.8
59.2
60.6
59.8
59.2
61.0
60.3
59.8
Table PD-3 — SCWD 20 - Economizer Low Capacity - 8,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
50
60
70
28
Total
MBh
140.0
147.0
152.4
175.6
188.4
198.0
224.3
241.1
253.7
160.2
166.4
170.7
177.8
189.3
198.1
223.8
240.5
253.1
183.2
190.2
195.1
188.1
197.7
205.0
223.6
240.0
252.6
45 F
Sensible
MBh
135.3
144.0
146.2
114.8
119.7
123.3
90.6
96.5
101.0
160.2
166.4
170.7
149.8
154.2
157.5
124.8
130.7
135.2
183.2
190.2
195.1
187.8
191.4
194.3
158.9
164.7
169.2
Entering Water Temp
LWT
F
50.6
49.9
49.4
52.0
51.3
50.7
54.0
53.0
52.2
51.4
50.5
49.9
52.1
51.3
50.7
54.0
53.0
52.2
52.3
51.3
50.6
52.5
51.6
50.9
53.9
53.0
52.2
Total
MBh
92.8
96.1
98.4
102.0
107.8
112.6
146.7
157.3
165.5
116.1
120.1
123.0
116.4
120.8
124.2
146.2
156.8
165.0
139.3
144.1
147.6
139.6
144.4
147.9
151.1
159.8
166.7
20 Ton
Water Cooled
Performance
Data
Table PD-4 — SCWD 20 Gross Cooling Capacity - 8,000 cfm, 60 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
244
266
289
244
266
289
247
265
288
Sensible
MBh
185
150
114
218
183
147
246
216
180
LWT
84.7
85.5
86.3
84.7
85.5
86.3
84.8
85.5
86.3
Total
MBh
235
256
278
235
256
278
239
256
278
Sensible
MBh
181
146
110
214
179
143
239
211
176
95 F
LWT
94.7
95.4
96.2
94.7
95.4
96.1
94.8
95.4
96.1
Total
MBh
225
246
267
226
245
267
231
245
267
Sensible
MBh
176
141
106
209
174
139
231
207
171
LWT
104.6
105.3
106.0
104.6
105.3
106.0
104.8
105.3
106.0
Chart PD-25 — Fan Performance for CV or with VFD
Chart PD-26 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
29
Performance
Data
22 Ton
Water Cooled
Table PD-5 — SCWD 22 - Economizer Full Capacity - 8,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
Total
MBh
226.8
237.6
245.9
286.3
305.8
320.8
365.5
391.8
411.9
249.7
258.1
264.5
292.3
309.6
322.9
364.6
390.8
410.9
284.2
292.5
298.4
305.7
320.5
332.0
366.9
391.3
410.3
45 F
Sensible
MBh
205.7
210.2
213.8
173.7
181.4
187.5
144.5
154.1
161.6
244.6
253.0
259.4
222.0
228.8
234.2
190.8
200.5
208.1
284.2
292.5
298.4
273.1
279.0
283.6
237.7
246.8
254.0
Entering Water Temp
LWT
F
53.2
52.2
51.4
55.4
54.3
53.3
58.3
56.9
55.7
54.1
52.8
51.9
55.6
54.4
53.4
58.3
56.8
55.7
55.3
53.9
52.7
56.1
54.7
53.6
58.3
56.9
55.7
Total
MBh
143.3
147.3
150.2
167.0
176.4
184.2
238.0
255.6
269.5
179.1
184.0
187.6
184.5
191.8
197.6
238.6
255.2
268.6
214.8
220.7
225.0
215.5
221.4
225.8
247.9
262.1
273.5
55 F
Sensible
MBh
143.3
147.3
150.2
129.3
132.6
135.4
100.2
106.1
110.8
179.1
184.0
187.6
181.5
184.1
186.2
146.7
152.2
156.8
214.8
220.7
225.0
215.5
221.4
225.8
195.9
200.7
204.6
LWT
F
60.2
59.5
58.9
61.1
60.3
59.8
63.7
62.7
62.0
61.5
60.6
59.9
61.7
60.8
60.1
63.7
62.7
62.0
62.8
61.7
60.8
62.8
61.7
60.9
64.0
62.9
62.1
55 F
Sensible
MBh
99.6
102.9
105.4
95.1
97.1
98.9
69.2
72.6
75.4
124.5
128.6
131.7
119.3
123.7
127.1
106.2
109.7
112.4
149.5
154.4
158.1
149.7
154.7
158.4
145.1
147.9
150.2
LWT
F
58.6
58.1
57.7
59.0
58.5
58.1
60.7
60.1
59.6
59.5
58.9
58.4
59.5
58.9
58.4
60.7
60.1
59.6
60.4
59.7
59.1
60.4
59.7
59.1
60.9
60.2
59.6
Table PD-6 — SCWD 22 - Economizer Low Capacity - 8,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
55
66
77
30
Total
MBh
150.1
157.1
162.5
188.1
200.9
210.7
240.1
256.9
269.8
172.2
178.4
182.9
190.4
201.9
210.8
239.6
256.4
269.2
196.8
203.9
209.0
201.6
211.1
218.5
239.3
255.8
268.6
45 F
Sensible
MBh
145.0
155.1
157.3
123.5
128.4
132.1
97.1
103.0
107.6
172.2
178.4
182.9
161.4
165.8
169.2
134.1
140.0
144.6
196.8
203.9
209.0
195.7
206.2
209.0
171.1
177.0
181.5
Entering Water Temp
LWT
F
50.5
49.8
49.2
51.8
51.1
50.5
53.7
52.8
52.0
51.3
50.4
49.7
51.9
51.1
50.5
53.7
52.8
52.0
52.2
51.2
50.4
52.3
51.4
50.7
53.7
52.8
52.0
Total
MBh
99.6
102.9
105.4
108.9
114.8
119.7
156.6
167.3
175.9
124.5
128.6
131.7
124.8
129.2
132.7
156.1
166.8
175.3
149.5
154.4
158.1
149.7
154.7
158.4
161.4
170.1
177.3
22 Ton
Water Cooled
Performance
Data
Table PD-7 — SCWD 22 Gross Cooling Capacity - 8,800 cfm, 66 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
257
280
305
257
280
304
262
280
304
Sensible
MBh
197
159
120
233
194
156
261
230
191
LWT
84.3
85.0
85.8
84.3
85.0
85.8
84.4
85.0
85.8
Total
MBh
248
270
294
248
270
294
254
270
293
Sensible
MBh
193
155
116
228
190
152
254
226
187
95 F
LWT
94.3
94.9
95.7
94.3
94.9
95.7
94.4
94.9
95.7
Total
MBh
238
259
282
238
259
282
246
259
282
Sensible
MBh
188
150
112
223
186
147
246
221
183
LWT
104.2
104.9
105.6
104.2
104.9
105.6
104.4
104.8
105.6
Chart PD-27 — Fan Performance for CV or with VFD
Chart PD-28 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
31
25 Ton
Water Cooled
Performance
Data
Table PD-8 — SCWD 25 - Economizer Full Capacity - 10,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
Total
MBh
250.7
261.4
265.2
316.1
335.6
342.5
404.1
429.9
439.1
276.9
285.3
288.2
322.6
339.8
345.9
403.2
428.9
438.1
315.6
324.1
326.9
337.7
352.4
357.6
404.8
429.2
438.0
45 F
Sensible
MBh
229.6
234.1
235.7
193.1
200.8
203.6
160.2
169.5
172.9
271.1
279.5
282.4
247.4
254.2
256.6
212.1
221.6
225.0
315.6
324.1
326.9
304.9
310.7
312.8
264.6
273.6
276.9
Entering Water Temp
LWT
F
53.0
52.0
51.6
55.0
53.9
53.6
57.8
56.5
56.0
53.8
52.6
52.2
55.2
54.1
53.6
57.8
56.4
56.0
55.0
53.6
53.2
55.7
54.4
53.9
57.9
56.4
55.9
Total
MBh
159.0
163.2
164.6
183.8
193.5
197.0
262.3
280.2
286.5
198.7
203.9
205.6
203.9
211.3
213.9
262.8
279.7
285.8
238.3
244.6
246.6
239.1
245.3
247.4
273.0
287.4
292.5
55 F
Sensible
MBh
159.0
163.2
164.6
144.0
147.5
148.7
110.9
116.9
119.0
198.7
203.9
205.6
202.9
205.6
206.5
163.2
168.8
170.9
238.3
244.6
246.6
239.1
245.3
247.4
218.6
223.4
225.1
LWT
F
60.0
59.4
59.1
60.8
60.2
59.9
63.3
62.5
62.2
61.3
60.4
60.1
61.5
60.6
60.3
63.3
62.5
62.1
62.6
61.5
61.2
62.6
61.5
61.2
63.7
62.7
62.3
55 F
Sensible
MBh
109.2
112.6
113.7
104.8
106.8
107.6
75.8
79.2
80.4
136.5
140.7
142.2
136.8
134.8
136.4
116.9
120.4
121.6
163.9
168.9
170.6
164.2
169.2
170.9
160.0
162.8
163.8
LWT
F
58.5
58.0
57.8
58.8
58.3
58.2
60.4
59.8
59.6
59.3
58.8
58.6
59.3
58.8
58.6
60.4
59.8
59.6
60.2
59.5
59.3
60.2
59.5
59.3
60.6
59.9
59.7
Table PD-9 — SCWD 25 - Economizer Low Capacity - 10,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
63
75
80
32
Total
MBh
164.5
171.1
173.5
205.7
218.1
222.4
262.5
278.7
284.5
189.1
195.2
197.2
208.1
219.1
223.1
262.0
278.1
283.9
216.2
223.0
225.4
220.7
229.7
233.0
261.5
277.6
283.2
45 F
Sensible
MBh
158.7
170.9
171.9
136.0
140.7
142.3
106.4
112.1
114.1
189.1
195.2
197.2
178.0
182.2
183.7
147.5
153.2
155.2
216.2
223.0
225.4
214.1
227.2
228.4
188.6
194.2
196.2
Entering Water Temp
LWT
F
50.2
49.6
49.3
51.5
50.8
50.6
53.3
52.4
52.1
51.0
50.2
49.9
51.6
50.8
50.6
53.3
52.4
52.1
51.9
50.9
50.6
52.0
51.1
50.8
53.3
52.4
52.1
Total
MBh
109.2
112.6
113.7
118.7
124.5
126.7
170.7
181.4
185.2
136.5
140.7
142.2
136.8
141.1
142.6
170.2
180.8
184.6
163.9
168.9
170.6
164.2
169.2
170.9
175.9
184.5
187.7
Performance
Data
25 Ton
Water Cooled
Table PD-10 — SCWD 25 Gross Cooling Capacity - 10,000 cfm,75 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
281
306
332
284
306
332
298
306
332
Sensible
MBh
234
184
133
278
231
180
298
278
228
LWT
83.9
84.5
85.3
83.9
84.5
85.3
84.3
84.6
85.2
Total
MBh
270
294
319
274
294
319
288
295
319
Sensible
MBh
229
179
129
272
227
176
288
272
223
95 F
LWT
93.8
94.4
95.1
93.8
94.4
95.1
94.3
94.4
95.1
Total
MBh
259
281
305
263
281
305
278
283
305
Sensible
MBh
224
174
124
263
221
171
278
267
218
LWT
103.6
104.3
105.0
103.8
104.3
104.9
104.2
104.3
104.9
Chart PD-29 — Fan Performance for CV or with VFD
Chart PD-30 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
33
29 Ton
Water Cooled
Performance
Data
Table PD-11 — SCWD 29 - Economizer Full Capacity - 11,600 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
Total
MBh
302.2
316.4
327.9
382.0
407.4
428.3
488.3
522.1
549.9
332.2
343.2
352.0
389.9
412.4
431.0
487.3
520.9
548.6
377.9
388.6
396.6
407.5
426.8
442.8
489.7
521.5
547.9
45 F
Sensible
MBh
272.9
278.8
283.8
231.0
241.1
249.5
192.9
205.3
215.7
325.4
336.5
345.3
294.8
303.8
311.3
254.1
266.7
277.2
377.9
388.6
396.6
362.3
370.0
376.5
316.0
327.9
337.9
Entering Water Temp
LWT
F
53.3
52.3
51.4
55.5
54.4
53.4
58.4
57.0
55.8
54.1
52.9
51.9
55.7
54.5
53.5
58.4
57.0
55.8
55.4
53.9
52.8
56.2
54.8
53.7
58.4
57.0
55.7
Total
MBh
190.6
195.7
199.7
222.7
235.2
245.9
318.0
340.8
360.0
238.2
244.5
249.4
245.9
255.3
263.4
318.8
340.3
358.8
285.7
293.2
299.0
286.6
294.2
300.1
331.0
349.3
365.1
55 F
Sensible
MBh
190.6
195.7
199.7
171.6
176.0
179.8
133.5
141.2
147.7
238.2
244.5
249.4
240.6
244.0
246.9
195.0
202.2
208.5
285.7
293.2
299.0
286.6
294.2
300.1
260.1
266.3
271.7
LWT
F
60.2
59.5
58.9
61.1
60.4
59.8
63.7
62.8
62.1
61.5
60.6
59.9
61.7
60.9
60.2
63.7
62.8
62.0
62.8
61.7
60.9
62.9
61.8
60.9
64.1
63.0
62.2
55 F
Sensible
MBh
133.0
137.3
140.7
126.7
129.3
131.8
92.5
97.0
100.9
166.2
171.6
175.9
159.4
165.1
170.0
141.7
146.2
150.0
199.5
205.9
211.0
199.9
206.3
211.5
193.2
196.9
200.2
LWT
F
58.6
58.2
57.8
59.0
58.5
58.1
60.7
60.1
59.6
59.6
58.9
58.4
59.6
59.0
58.5
60.7
60.1
59.6
60.5
59.7
59.1
60.5
59.7
59.1
60.9
60.2
59.7
Table PD-12 — SCWD 29 - Economizer Low Capacity - 11,600 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
73
87
102
34
Total
MBh
200.6
209.8
217.4
251.7
268.6
282.3
321.4
343.5
361.6
229.7
237.9
244.1
254.7
269.9
282.5
320.7
342.8
360.8
262.7
271.9
279.0
269.4
282.0
292.4
320.3
342.1
360.0
45 F
Sensible
MBh
193.8
206.5
209.6
164.8
171.2
176.4
129.8
137.7
144.1
229.7
237.9
244.1
215.0
220.8
225.6
179.0
186.8
193.2
262.7
271.9
279.0
261.6
274.4
278.4
228.1
235.8
242.2
Entering Water Temp
LWT
F
50.5
49.8
49.3
51.9
51.2
50.5
53.8
52.9
52.1
51.3
50.5
49.8
52.0
51.2
50.5
53.8
52.9
52.1
52.2
51.3
50.5
52.4
51.5
50.7
53.8
52.9
52.1
Total
MBh
133.0
137.3
140.7
145.8
153.5
160.5
209.9
223.9
235.8
166.2
171.6
175.9
166.6
172.4
177.4
209.2
223.2
235.0
199.5
205.9
211.0
199.9
206.3
211.5
216.1
227.6
237.6
29 Ton
Water Cooled
Performance
Data
Table PD-13— SCWD 29 Gross Cooling Capacity - 11,600 cfm, 87 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
335
365
397
336
365
396
347
365
396
Sensible
MBh
266
211
157
315
262
208
347
312
258
LWT
84.2
84.9
85.6
84.2
84.9
85.6
84.4
84.9
85.6
Total
MBh
323
352
383
325
352
381
337
351
381
Sensible
MBh
259
206
152
309
256
202
337
306
253
95 F
LWT
94.1
94.8
95.5
94.1
94.8
95.5
94.4
94.8
95.5
Total
MBh
309
337
366
311
337
366
325
337
366
Sensible
MBh
254
201
146
301
251
196
325
300
246
LWT
104.0
104.7
105.4
104.0
104.6
105.4
104.3
104.7
105.3
Chart PD-31 — Fan Performance for CV or with VFD
Chart PD-32 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
35
Performance
Data
32 Ton
Water Cooled
Table PD-14 — SCWD 32 - Economizer Full Capacity - 12,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
Total
MBh
325.8
340.9
345.5
410.8
438.2
446.8
524.5
561.3
572.8
359.2
371.0
374.6
419.5
443.6
451.2
523.3
560.0
571.4
409.2
420.9
424.4
439.0
459.6
466.1
526.4
560.6
571.4
45 F
Sensible
MBh
296.8
303.2
305.1
250.1
260.9
264.3
207.6
221.1
225.3
351.8
363.6
367.2
320.1
329.6
332.6
274.5
288.2
292.5
409.2
420.9
424.4
394.1
402.3
404.9
342.5
355.2
359.3
Entering Water Temp
LWT
F
53.1
52.1
51.8
55.3
54.1
53.8
58.1
56.7
56.2
54.0
52.7
52.3
55.5
54.2
53.8
58.1
56.7
56.2
55.2
53.8
53.3
56.0
54.6
54.1
58.2
56.7
56.2
Total
MBh
206.2
212.0
213.7
239.5
252.7
257.1
341.3
366.1
374.0
257.7
264.8
266.9
265.0
275.3
278.6
342.0
365.5
373.1
309.1
317.6
320.1
310.1
318.6
321.2
355.4
375.4
381.8
55 F
Sensible
MBh
206.2
212.0
213.7
186.4
191.1
192.7
144.0
152.2
154.9
257.7
264.8
266.9
262.1
265.8
267.0
211.3
219.1
221.7
309.1
317.6
320.1
310.1
318.6
321.2
282.6
289.3
291.5
LWT
F
60.2
59.4
59.2
61.0
60.3
60.0
63.5
62.6
62.3
61.4
60.5
60.2
61.6
60.7
60.5
63.6
62.6
62.3
62.7
61.6
61.3
62.8
61.6
61.3
63.9
62.8
62.5
55 F
Sensible
MBh
142.6
147.3
148.7
136.5
139.3
140.3
99.0
103.8
105.3
178.3
184.1
185.9
178.6
176.7
178.6
152.4
157.2
158.7
214.0
220.9
223.0
214.4
221.3
223.5
208.3
212.2
213.5
LWT
F
58.6
58.1
57.9
58.9
58.4
58.3
60.6
60.0
59.8
59.5
58.8
58.6
59.5
58.8
58.7
60.6
60.0
59.8
60.3
59.6
59.4
60.4
59.6
59.4
60.8
60.1
59.8
Table PD-15 — SCWD 32 - Economizer Low Capacity - 12,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
80
96
102
36
Total
MBh
214.8
224.4
227.4
268.8
286.5
292.0
343.2
366.3
373.5
246.7
255.3
257.8
272.1
287.9
292.9
342.5
365.5
372.7
282.0
291.8
294.7
288.3
301.4
305.5
342.0
364.8
371.9
45 F
Sensible
MBh
207.4
222.7
223.9
177.2
183.8
185.9
138.9
147.1
149.6
246.7
255.3
257.8
231.7
237.7
239.6
192.3
200.4
202.9
282.0
291.8
294.7
279.8
296.0
297.6
245.6
253.6
256.1
Entering Water Temp
LWT
F
50.4
49.7
49.5
51.7
51.0
50.7
53.6
52.6
52.3
51.2
50.3
50.1
51.8
51.0
50.7
53.6
52.6
52.3
52.0
51.1
50.8
52.2
51.3
51.0
53.5
52.6
52.3
Total
MBh
142.6
147.3
148.7
155.5
163.6
166.4
223.5
238.5
243.3
178.3
184.1
185.9
178.6
184.7
186.7
222.8
237.7
242.5
214.0
220.9
223.0
214.4
221.3
223.5
230.4
242.5
246.5
32 Ton
Water Cooled
Performance
Data
Table PD-16 — SCWD 32 Gross Cooling Capacity - 12,800 cfm, 96 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
367
398
432
374
398
431
393
401
431
Sensible
MBh
317
246
175
372
313
241
393
377
308
LWT
83.9
84.6
85.3
84.1
84.6
85.3
84.5
84.7
85.3
Total
MBh
352
382
415
361
382
415
380
386
414
Sensible
MBh
310
240
169
360
307
236
380
370
302
95 F
LWT
93.8
94.5
95.2
94.0
94.5
95.2
94.4
94.6
95.2
Total
MBh
337
365
397
348
365
397
367
369
395
Sensible
MBh
303
233
163
348
300
229
367
361
296
LWT
103.7
104.3
105.0
103.9
104.3
105.0
104.3
104.4
105.0
Chart PD-33 — Fan Performance for CV or with VFD
Chart PD-34 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
37
Performance
Data
35 Ton
Water Cooled
Table PD-17 — SCWD 35 - Economizer Full Capacity - 14,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
Total
MBh
335.2
349.5
358.9
425.7
451.9
469.1
544.6
579.2
602.1
370.3
381.4
388.6
432.4
455.5
470.9
543.4
577.9
600.6
422.4
433.8
440.9
451.5
471.1
484.1
544.2
577.1
599.3
45 F
Sensible
MBh
309.5
315.4
319.4
260.8
271.0
277.9
216.1
228.9
237.4
362.2
373.3
380.5
333.5
342.6
348.7
286.3
299.0
307.6
422.4
433.8
440.9
410.9
418.7
423.9
357.0
369.2
377.5
Entering Water Temp
LWT
F
52.6
51.7
51.0
54.7
53.6
52.9
57.4
56.0
55.1
53.4
52.3
51.5
54.8
53.7
52.9
57.3
56.0
55.1
54.6
53.3
52.4
55.3
54.0
53.1
57.4
56.0
55.1
Total
MBh
212.8
218.4
221.9
246.3
259.2
268.1
354.1
377.7
393.3
265.9
272.9
277.3
272.4
282.1
288.7
353.7
376.4
391.9
319.0
327.3
332.5
319.9
328.3
333.5
365.6
384.6
397.7
55 F
Sensible
MBh
212.8
218.4
221.9
194.3
198.8
202.0
149.9
157.7
162.9
265.9
272.9
277.3
263.1
277.2
279.6
220.4
228.0
233.1
319.0
327.3
332.5
319.9
328.3
333.5
294.8
301.2
305.6
LWT
F
59.8
59.2
58.7
60.6
59.9
59.5
63.0
62.2
61.6
61.0
60.2
59.7
61.2
60.4
59.9
63.0
62.2
61.6
62.2
61.2
60.6
62.3
61.3
60.6
63.3
62.3
61.7
55 F
Sensible
MBh
143.3
147.5
150.3
137.4
140.1
142.0
100.5
105.0
107.9
179.2
184.4
187.8
179.5
176.3
179.9
154.2
158.6
161.5
215.0
221.3
225.3
215.4
221.7
225.7
209.6
213.2
215.8
LWT
F
58.3
57.8
57.5
58.6
58.1
57.9
60.2
59.6
59.2
59.1
58.5
58.2
59.1
58.5
58.2
60.2
59.6
59.2
59.9
59.2
58.8
59.9
59.2
58.8
60.3
59.6
59.2
Table PD-18 — SCWD 35 - Economizer Low Capacity - 14,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
88
105
119
38
Total
MBh
216.3
224.9
230.7
274.3
290.2
300.7
350.3
371.3
385.1
248.2
255.9
260.8
275.7
290.3
300.2
349.6
370.5
384.3
283.7
292.5
298.0
290.3
302.1
310.0
348.9
369.7
383.5
45 F
Sensible
MBh
208.3
223.6
225.9
179.6
185.6
189.6
141.5
148.9
153.9
248.2
255.9
260.8
233.7
239.2
243.0
195.1
202.4
207.4
283.7
292.5
298.0
281.2
297.2
300.2
248.6
255.9
260.8
Entering Water Temp
LWT
F
49.9
49.3
48.9
51.2
50.5
50.1
53.0
52.1
51.5
50.6
49.9
49.4
51.3
50.5
50.0
52.9
52.1
51.5
51.4
50.6
50.0
51.6
50.8
50.2
52.9
52.0
51.4
Total
MBh
143.3
147.5
150.3
157.0
164.7
170.1
228.0
241.7
250.9
179.2
184.4
187.8
179.5
184.9
188.6
227.3
241.0
250.1
215.0
221.3
225.3
215.4
221.7
225.7
232.4
243.8
251.6
35 Ton
Water Cooled
Performance
Data
Table PD-19 — SCWD 35 Gross Cooling Capacity - 14,000 cfm, 105 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
401
436
474
402
436
473
419
435
473
Sensible
MBh
320
254
188
381
316
250
419
377
311
LWT
84.1
84.8
85.5
84.1
84.8
85.5
84.4
84.8
85.5
Total
MBh
386
420
456
388
419
455
406
419
455
Sensible
MBh
313
247
182
373
309
243
406
370
304
95 F
LWT
94.0
94.7
95.4
94.0
94.7
95.4
94.4
94.7
95.4
Total
MBh
369
402
437
373
402
436
392
402
436
Sensible
MBh
306
240
175
365
302
236
392
363
297
LWT
103.9
104.6
105.3
104.0
104.6
105.3
104.4
104.6
105.2
Chart PD-35 — Fan Performance for CV or with VFD
Chart PD-36 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
39
Performance
Data
38 Ton
Water Cooled
Table PD-20 — SCWD 38 - Economizer Full Capacity - 15,200 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
Total
MBh
355.5
370.6
374.1
450.7
478.7
485.0
576.2
613.4
621.8
394.0
405.8
408.5
457.8
482.4
488.0
574.9
612.0
620.3
449.7
462.2
464.8
478.6
499.4
504.2
575.8
611.1
619.2
45 F
Sensible
MBh
330.9
337.2
338.7
277.7
288.7
291.2
229.0
242.7
245.8
385.2
397.1
399.7
356.0
365.7
367.9
304.5
318.2
321.3
449.7
462.2
464.8
439.4
447.7
449.6
380.7
393.6
396.6
Entering Water Temp
LWT
F
52.5
51.5
51.3
54.5
53.4
53.2
57.1
55.8
55.4
53.3
52.1
51.9
54.6
53.5
53.2
57.1
55.7
55.4
54.5
53.1
52.8
55.1
53.8
53.5
57.1
55.7
55.4
Total
MBh
226.5
232.7
234.0
260.8
274.4
277.6
374.4
399.7
405.4
283.0
290.7
292.4
289.1
299.5
301.8
374.0
398.4
404.0
339.5
348.7
350.7
340.5
349.7
351.7
386.7
407.1
411.8
55 F
Sensible
MBh
226.5
232.7
234.0
207.6
212.4
213.5
159.1
167.5
169.4
283.0
290.7
292.4
279.0
296.9
297.8
235.0
243.1
245.0
339.5
348.7
350.7
340.5
349.7
351.7
315.1
321.9
323.5
LWT
F
59.8
59.1
58.9
60.5
59.8
59.7
62.9
62.0
61.8
61.0
60.1
59.9
61.1
60.3
60.1
62.9
62.0
61.8
62.1
61.1
60.9
62.2
61.1
60.9
63.1
62.1
61.9
55 F
Sensible
MBh
151.4
155.9
156.9
145.8
148.5
149.2
106.0
110.7
111.8
189.2
194.9
196.1
189.5
185.9
187.2
163.2
167.9
168.9
227.1
233.8
235.3
227.5
234.2
235.7
222.3
226.2
227.1
LWT
F
58.2
57.7
57.6
58.5
58.0
57.9
60.0
59.5
59.3
59.0
58.4
58.3
59.0
58.4
58.3
60.0
59.4
59.3
59.8
59.1
59.0
59.8
59.1
59.0
60.1
59.5
59.4
Table PD-21 — SCWD 38 - Economizer Low Capacity - 15,200 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
95
114
119
40
Total
MBh
228.0
237.0
239.0
288.5
305.2
308.9
368.4
390.3
395.3
262.3
270.4
272.2
290.0
305.3
308.8
367.6
389.5
394.5
299.8
309.1
311.1
305.9
318.2
321.0
366.9
388.7
393.6
45 F
Sensible
MBh
219.3
228.2
238.1
190.0
196.3
197.7
149.1
156.8
158.6
262.3
270.4
272.2
247.8
253.5
254.8
206.3
213.9
215.7
299.8
309.1
311.1
296.1
315.4
316.5
263.3
270.9
272.7
Entering Water Temp
LWT
F
49.8
49.2
49.0
51.1
50.4
50.2
52.8
51.8
51.6
50.5
49.7
49.6
51.1
50.4
50.2
52.7
51.8
51.6
51.3
50.4
50.2
51.4
50.6
50.4
52.7
51.8
51.6
Total
MBh
151.4
155.9
156.9
165.1
173.1
175.0
239.5
254.0
257.3
189.2
194.9
196.1
189.5
195.2
196.5
238.7
253.2
256.4
227.1
233.8
235.3
227.5
234.2
235.7
244.3
256.2
259.0
38 Ton
Water Cooled
Performance
Data
Table PD-22 — SCWD 38 Gross Cooling Capacity - 15,200 cfm, 114 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
434
471
511
441
470
510
465
473
510
Sensible
MBh
373
290
206
441
369
285
465
444
363
LWT
83.9
84.6
85.3
84.1
84.6
85.3
84.5
84.7
85.3
Total
MBh
416
452
490
426
452
490
450
455
489
Sensible
MBh
365
283
199
426
361
277
450
435
355
95 F
LWT
93.8
94.5
95.2
94.0
94.5
95.2
94.4
94.5
95.2
Total
MBh
398
432
469
410
432
468
433
436
468
Sensible
MBh
357
275
192
410
353
270
433
425
348
LWT
103.7
104.3
105.0
103.9
104.3
105.0
104.4
104.4
105.0
Chart PD-37 — Fan Performance for CV or with VFD
Chart PD-38 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
41
42 Ton
Water Cooled
Performance
Data
Table PD-23 — SCWD 42 - Economizer Full Capacity - 16,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
Total
MBh
438.5
457.1
468.6
556.7
591.2
612.2
711.9
757.8
786.0
480.2
494.6
503.3
566.9
597.1
615.8
710.3
756.0
784.0
545.5
559.4
567.3
590.8
616.6
632.5
712.7
756.0
782.8
45 F
Sensible
MBh
393.8
401.7
406.6
335.0
348.7
357.2
281.0
297.9
308.5
470.5
484.9
493.6
426.2
438.3
445.8
368.9
386.0
396.7
545.5
559.4
567.3
522.7
533.0
539.5
457.3
473.6
483.8
Entering Water Temp
LWT
F
53.4
52.3
51.6
55.6
54.4
53.6
58.6
57.0
56.1
54.1
52.9
52.1
55.8
54.5
53.7
58.5
57.0
56.0
55.4
53.9
53.0
56.3
54.8
53.9
58.6
57.0
56.0
Total
MBh
274.5
281.4
285.4
322.8
339.9
350.8
462.2
494.2
513.6
343.0
351.6
356.5
354.9
367.9
375.9
462.7
493.0
511.9
411.4
421.6
427.4
412.7
423.0
428.9
479.1
504.7
520.7
55 F
Sensible
MBh
274.5
281.4
285.4
247.5
253.6
257.5
193.6
204.4
211.0
343.0
351.6
356.5
346.2
350.9
353.8
281.8
291.9
298.3
411.4
421.6
427.4
412.7
423.0
428.9
374.9
383.5
388.9
LWT
F
60.2
59.5
59.0
61.1
60.4
59.9
63.8
62.8
62.2
61.5
60.6
60.0
61.8
60.8
60.3
63.8
62.8
62.2
62.8
61.7
61.0
62.9
61.7
61.0
64.1
63.0
62.3
55 F
Sensible
MBh
191.1
196.7
200.0
181.4
184.9
187.3
133.9
140.0
143.8
238.9
245.9
250.0
346.2
236.8
241.5
203.7
209.7
213.5
286.7
295.0
299.9
287.3
295.6
300.5
276.2
281.3
284.5
LWT
F
58.6
58.1
57.8
59.0
58.5
58.2
60.8
60.2
59.7
59.6
58.9
58.5
61.8
58.9
58.6
60.8
60.1
59.7
60.5
59.7
59.2
60.5
59.7
59.2
61.0
60.2
59.8
Table PD-24 — SCWD 42 - Economizer Low Capacity - 16,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
105
126
142
42
Total
MBh
291.1
302.7
310.0
368.9
390.4
403.6
471.3
499.6
517.1
331.6
341.5
347.4
566.9
391.2
403.5
470.3
498.5
515.9
379.0
390.3
397.0
390.9
406.8
416.8
469.3
497.4
514.8
45 F
Sensible
MBh
290.3
295.0
298.0
238.2
246.4
251.5
189.6
199.7
206.0
331.6
341.5
347.4
426.2
316.4
321.1
259.3
269.3
275.6
379.0
390.3
397.0
385.8
392.0
395.8
328.9
338.8
345.1
Entering Water Temp
LWT
F
50.5
49.8
49.4
52.0
51.2
50.7
54.0
52.9
52.3
51.3
50.4
49.9
55.8
51.2
50.7
54.0
52.9
52.3
52.2
51.2
50.6
52.4
51.5
50.9
53.9
52.9
52.3
Total
MBh
191.1
196.7
200.0
211.6
221.9
228.7
306.1
325.0
336.6
238.9
245.9
250.0
354.9
247.4
252.1
305.1
323.9
335.5
286.7
295.0
299.9
287.3
295.6
300.5
313.2
328.7
338.5
Performance
Data
42 Ton
Water Cooled
Table PD-25 — SCWD 42 Gross Cooling Capacity - 16,800 cfm, 126 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
488
530
576
493
530
576
513
532
575
Sensible
MBh
403
317
231
473
397
311
512
476
391
LWT
84.1
84.9
85.6
84.3
84.9
85.6
84.6
84.9
85.6
Total
MBh
469
510
554
476
510
554
496
512
553
Sensible
MBh
394
309
223
460
389
303
496
467
383
95 F
LWT
94.1
94.7
95.5
94.2
94.7
95.5
94.5
94.8
95.5
Total
MBh
449
488
531
458
488
530
479
491
530
Sensible
MBh
385
300
215
445
380
295
479
456
375
LWT
104.0
104.6
105.3
104.1
104.6
105.3
104.5
104.6
105.3
Chart PD-39 — Fan Performance for CV or with VFD
Chart PD-40 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
43
46 Ton
Water Cooled
Performance
Data
Table PD-26 — SCWD 46 - Economizer Full Capacity - 18,400 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Water Flow
gpm
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
Total
MBh
469.0
488.5
491.5
594.6
630.9
636.3
760.7
808.6
815.8
515.3
530.5
532.7
605.5
637.2
642.0
759.0
806.6
813.8
586.3
601.2
603.4
631.8
658.8
662.8
761.0
806.5
813.3
45 F
Sensible
MBh
425.0
433.3
434.5
360.1
374.4
376.6
300.9
318.4
321.1
504.7
519.8
522.0
459.2
471.8
473.7
396.1
413.9
416.6
586.3
601.2
603.4
564.1
574.9
576.6
492.1
509.1
511.6
Entering Water Temp
LWT
F
53.2
52.1
51.9
55.3
54.1
54.0
58.2
56.7
56.5
54.0
52.7
52.5
55.5
54.2
54.0
58.2
56.7
56.5
55.2
53.7
53.5
56.0
54.5
54.3
58.2
56.7
56.5
Total
MBh
295.0
302.5
303.5
344.7
362.5
365.3
493.5
526.8
531.8
368.6
377.9
379.2
380.0
393.5
395.6
493.9
525.5
530.3
442.1
453.1
454.7
443.5
454.6
456.2
511.5
538.2
542.2
55 F
Sensible
MBh
295.0
302.5
303.5
266.9
273.2
274.2
207.5
218.7
220.3
368.6
377.9
379.2
374.4
379.2
380.0
303.3
313.9
315.5
442.1
453.1
454.7
443.5
454.6
456.2
404.5
413.4
414.8
LWT
F
60.1
59.4
59.3
61.0
60.3
60.1
63.6
62.6
62.5
61.4
60.5
60.3
61.6
60.7
60.6
63.6
62.6
62.5
62.7
61.6
61.4
62.7
61.6
61.4
63.9
62.8
62.6
55 F
Sensible
MBh
203.6
209.4
210.3
194.0
197.6
198.2
142.3
148.6
149.6
254.4
261.7
262.8
243.6
251.4
252.5
217.5
223.7
224.7
305.3
314.0
315.3
305.9
314.6
315.9
295.6
300.7
301.5
LWT
F
58.5
58.0
58.0
58.9
58.4
58.3
60.6
60.0
59.9
59.4
58.8
58.7
59.4
58.8
58.7
60.6
60.0
59.9
60.3
59.6
59.4
60.3
59.6
59.4
60.8
60.0
59.9
Table PD-27 — SCWD 46 - Economizer Low Capacity - 18,400 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Water Flow
gpm
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
115
138
142
44
Total
MBh
309.1
321.0
322.8
390.9
413.0
416.4
499.2
528.4
532.8
353.2
363.6
365.1
394.0
413.9
417.0
498.1
527.3
531.6
403.6
415.5
417.2
414.9
431.2
433.7
497.1
526.1
530.5
45 F
Sensible
MBh
298.4
315.6
316.3
254.1
262.5
263.8
201.2
211.6
213.1
353.2
363.6
365.1
330.3
337.9
339.1
276.3
286.6
288.1
403.6
415.5
417.2
413.1
419.4
420.3
351.2
361.4
363.0
Entering Water Temp
LWT
F
50.4
49.7
49.5
51.8
51.0
50.9
53.7
52.7
52.5
51.1
50.3
50.1
51.9
51.0
50.9
53.7
52.6
52.5
52.0
51.0
50.9
52.2
51.2
51.1
53.6
52.6
52.5
Total
MBh
203.6
209.4
210.3
224.1
234.6
236.3
324.1
343.5
346.4
254.4
261.7
262.8
255.0
262.9
264.1
323.0
342.3
345.2
305.3
314.0
315.3
305.9
314.6
315.9
331.7
347.6
350.0
46 Ton
Water Cooled
Performance
Data
Table PD-28 — SCWD 46 Gross Cooling Capacity - 18,400 cfm, 138 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
517
561
609
530
562
609
556
567
609
Sensible
MBh
449
348
248
520
444
343
556
533
437
LWT
83.8
84.4
85.1
84.0
84.4
85.1
84.4
84.5
85.1
Total
MBh
498
540
586
511
539
586
538
546
585
Sensible
MBh
439
340
239
505
435
334
538
521
428
95 F
LWT
93.6
94.3
95.0
93.9
94.3
95.0
94.3
94.4
95.0
Total
MBh
476
516
561
491
516
560
518
524
559
Sensible
MBh
429
331
231
488
425
325
518
505
420
LWT
103.5
104.1
104.8
103.8
104.1
104.8
104.2
104.3
104.5
Chart PD-41 — Fan Performance for CV or with VFD
Chart PD-42— Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
45
Performance
Data
52 Ton
Water Cooled
Table PD-29 — SCWD 52 - Economizer Full Capacity - 20,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
Total
MBh
546.6
570.0
588.4
694.3
737.5
771.2
887.8
945.5
990.6
598.2
616.2
630.1
707.0
744.9
774.8
885.8
943.2
988.1
679.1
696.3
708.9
736.6
769.0
794.5
888.9
943.3
986.2
45 F
Sensible
MBh
489.7
499.6
507.5
417.0
434.2
447.8
350.3
371.6
388.5
586.1
604.1
618.1
530.2
545.4
557.5
459.3
480.9
498.1
679.1
696.3
708.9
649.9
662.9
673.3
569.1
589.5
606.0
Entering Water Temp
LWT
F
53.4
52.3
51.5
55.7
54.5
53.5
58.7
57.1
55.9
54.2
52.9
51.9
55.9
54.5
53.5
58.6
57.1
55.9
55.4
53.9
52.8
56.3
54.9
53.7
58.7
57.1
55.8
Total
MBh
341.8
350.4
356.6
402.7
424.2
441.7
576.6
616.7
647.8
427.0
437.6
445.4
442.3
458.6
471.5
577.3
615.2
645.6
512.1
524.8
534.0
513.8
526.6
535.8
597.7
629.7
655.5
55 F
Sensible
MBh
341.8
350.4
356.6
307.8
315.4
321.7
241.3
254.8
265.4
427.0
437.6
445.4
430.2
436.1
440.8
350.6
363.4
373.7
512.1
524.8
534.0
513.8
526.6
535.8
466.2
477.0
485.8
LWT
F
60.3
59.5
58.9
61.2
60.4
59.9
63.9
62.9
62.1
61.6
60.6
59.9
61.8
60.9
60.2
63.9
62.9
62.1
62.9
61.7
60.9
62.9
61.8
60.9
64.2
63.1
62.2
55 F
Sensible
MBh
238.6
245.6
250.9
226.1
230.6
234.5
167.2
174.9
181.1
298.2
306.9
313.5
286.4
295.9
303.6
254.0
261.7
267.8
357.9
368.3
376.1
358.6
369.0
376.9
344.3
350.7
355.9
LWT
F
58.7
58.1
57.8
59.1
58.6
58.2
60.9
60.2
59.7
59.6
58.9
58.4
59.6
59.0
58.5
60.9
60.2
59.7
60.5
59.7
59.1
60.5
59.7
59.1
61.0
60.3
59.7
Table PD-30 — SCWD 52 - Economizer Low Capacity - 20,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
130
156
182
46
Total
MBh
363.7
378.3
390.1
461.2
488.3
509.6
589.2
625.0
653.2
413.9
426.4
435.8
464.9
489.3
509.2
588.0
623.6
651.7
473.1
487.2
497.9
488.4
508.5
524.8
586.7
622.2
650.2
45 F
Sensible
MBh
361.8
367.7
372.6
297.3
307.6
315.8
236.9
249.6
259.8
413.9
426.4
435.8
385.4
394.7
402.3
323.6
336.3
346.4
473.1
487.2
497.9
480.9
488.6
494.9
410.2
422.8
432.9
Entering Water Temp
LWT
F
50.6
49.9
49.3
52.1
51.3
50.6
54.1
53.0
52.2
51.4
50.5
49.8
52.2
51.3
50.6
54.0
53.0
52.2
52.3
51.2
50.5
52.5
51.5
50.8
54.0
53.0
52.1
Total
MBh
238.6
245.6
250.9
264.6
277.6
288.6
382.8
406.6
425.4
298.2
306.9
313.5
299.4
309.0
316.7
381.6
405.2
423.9
357.9
368.3
376.1
358.6
369.0
376.9
391.6
411.1
427.1
52 Ton
Water Cooled
Performance
Data
Table PD-31 — SCWD 52 Gross Cooling Capacity - 20,800 cfm, 156 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
596
650
707
598
649
706
616
649
705
Sensible
MBh
471
376
280
559
465
369
616
554
458
LWT
84.1
84.8
85.5
84.1
84.8
85.5
84.3
84.8
85.5
Total
MBh
575
626
681
577
626
680
598
625
680
Sensible
MBh
461
366
271
548
455
360
598
544
448
95 F
LWT
94.0
94.7
95.4
94.0
94.7
95.4
94.3
94.7
95.4
Total
MBh
551
601
654
555
600
653
579
601
653
Sensible
MBh
450
356
261
535
445
350
579
533
438
LWT
103.9
104.6
105.3
104.0
104.6
105.3
104.3
104.6
105.3
Chart PD-43 — Fan Performance for CV or with VFD
Chart PD-44 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
47
Performance
Data
58 Ton
Water Cooled
Table PD-32 — SCWD 58 - Economizer Full Capacity - 23,200 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
Total
MBh
592.9
617.6
626.2
751.8
797.7
813.5
961.6
1022.3
1043.5
651.2
670.3
676.9
765.5
805.6
819.6
959.5
1019.8
1040.9
740.7
759.6
765.8
798.6
832.8
844.7
962.1
1019.7
1039.8
45 F
Sensible
MBh
536.8
547.2
550.8
454.9
473.1
479.4
380.3
402.5
410.3
637.7
656.9
663.4
580.0
595.9
601.5
500.5
523.0
531.0
740.7
759.6
765.8
712.4
726.1
730.9
621.6
643.1
650.7
Entering Water Temp
LWT
F
53.2
52.1
51.7
55.4
54.2
53.7
58.3
56.8
56.2
54.0
52.7
52.3
55.6
54.3
53.8
58.2
56.7
56.2
55.2
53.7
53.2
56.0
54.6
54.1
58.3
56.7
56.2
Total
MBh
372.8
382.2
385.2
435.8
458.4
466.5
623.9
666.1
680.7
465.7
477.4
481.2
480.3
497.4
503.4
624.4
664.5
678.6
558.6
572.5
577.0
560.3
574.3
578.9
646.7
680.5
692.4
55 F
Sensible
MBh
372.8
382.2
385.2
337.1
345.1
348.0
262.3
276.4
281.3
465.7
477.4
481.2
472.7
478.9
481.0
383.1
396.5
401.3
558.6
572.5
577.0
560.3
574.3
578.9
510.8
522.2
526.2
LWT
F
60.1
59.4
59.1
61.0
60.3
60.0
63.6
62.7
62.3
61.4
60.5
60.2
61.6
60.7
60.4
63.6
62.6
62.3
62.7
61.6
61.2
62.7
61.6
61.2
63.9
62.8
62.4
55 F
Sensible
MBh
257.4
264.8
267.3
245.2
249.8
251.5
180.0
188.0
190.8
321.8
331.0
334.1
308.1
318.0
321.4
275.0
282.9
285.6
386.1
397.1
400.8
386.8
397.9
401.6
373.6
380.2
382.5
LWT
F
58.6
58.0
57.9
58.9
58.4
58.2
60.7
60.0
59.8
59.4
58.8
58.6
59.4
58.8
58.6
60.6
60.0
59.8
60.3
59.6
59.3
60.3
59.6
59.3
60.8
60.1
59.8
Table PD-33 — SCWD 58 - Economizer Low Capacity - 23,200 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
145
174
186
48
Total
MBh
391.0
406.1
411.4
494.5
522.7
532.4
631.6
668.7
681.6
446.6
459.8
464.3
498.5
523.8
532.8
630.3
667.3
680.1
510.4
525.4
530.5
524.8
545.5
552.8
628.9
665.8
678.6
45 F
Sensible
MBh
377.5
398.9
401.1
321.3
331.9
335.7
254.6
267.7
272.3
446.6
459.8
464.3
417.6
427.2
430.6
349.4
362.4
367.0
510.4
525.4
530.5
522.1
530.1
532.9
444.0
457.0
461.5
Entering Water Temp
LWT
F
50.4
49.7
49.4
51.8
51.0
50.7
53.7
52.7
52.3
51.2
50.3
50.0
51.9
51.0
50.7
53.7
52.7
52.3
52.0
51.0
50.7
52.2
51.3
50.9
53.7
52.7
52.3
Total
MBh
257.4
264.8
267.3
283.6
296.9
301.9
410.1
434.7
443.2
321.8
331.0
334.1
322.6
332.5
336.0
408.7
433.2
441.8
386.1
397.1
400.8
386.8
397.9
401.6
419.7
439.8
447.0
Performance
Data
58 Ton
Water Cooled
Table PD-34 — SCWD 58 Gross Cooling Capacity - 23,200 cfm, 174 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
663
720
782
675
720
781
712
725
781
Sensible
MBh
571
444
316
674
564
436
712
679
555
LWT
83.9
84.6
85.3
84.1
84.6
85.3
84.5
84.6
85.3
Total
MBh
637
692
751
653
692
751
689
698
750
Sensible
MBh
559
433
306
653
553
425
689
666
545
95 F
LWT
93.8
94.4
95.2
94.0
94.4
95.2
94.4
94.5
95.1
Total
MBh
610
662
719
629
662
719
665
669
718
Sensible
MBh
547
421
294
629
541
414
665
652
533
LWT
103.7
104.3
105.0
103.9
104.3
105.0
104.3
104.4
105.0
Chart PD-45 — Fan Performance for CV or with VFD
Chart PD-46 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
49
Performance
Data
65 Ton
Water Cooled
Table PD-35 — SCWD 65 - Economizer Full Capacity - 26,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
Total
MBh
644.4
670.0
689.7
815.9
863.7
899.9
1043.3
1106.7
1155.0
710.6
730.5
745.5
830.6
872.3
904.5
1041.0
1104.0
1152.2
809.6
829.9
844.4
867.7
903.1
930.4
1043.6
1103.6
1149.9
45 F
Sensible
MBh
590.0
600.7
609.0
497.6
516.4
530.8
413.8
436.7
454.5
695.5
715.4
730.4
636.1
652.6
665.4
546.6
569.9
588.1
809.6
829.9
844.4
783.1
797.2
808.2
680.9
703.1
720.5
Entering Water Temp
LWT
F
52.9
51.9
51.1
55.0
53.9
53.0
57.8
56.4
55.2
53.7
52.5
51.6
55.2
53.9
53.0
57.8
56.3
55.2
54.9
53.5
52.5
55.6
54.3
53.2
57.8
56.3
55.2
Total
MBh
407.4
417.5
424.7
472.6
495.9
514.5
676.7
720.4
753.5
509.0
521.6
530.5
522.6
540.3
553.9
676.9
718.5
750.9
610.6
625.5
636.1
612.4
627.4
638.2
701.3
736.1
763.4
55 F
Sensible
MBh
407.4
417.5
424.7
370.1
378.4
385.0
285.8
300.4
311.5
509.0
521.6
530.5
520.8
527.1
532.0
419.8
433.6
444.5
610.6
625.5
636.1
612.4
627.4
638.2
561.3
573.0
582.1
LWT
F
60.0
59.3
58.8
60.8
60.1
59.6
63.3
62.4
61.7
61.2
60.3
59.7
61.4
60.5
59.9
63.3
62.4
61.6
62.5
61.4
60.6
62.5
61.4
60.6
63.6
62.5
61.8
55 F
Sensible
MBh
278.1
285.8
291.4
266.3
271.0
274.9
194.2
202.3
208.5
347.6
357.2
364.2
348.2
342.1
349.7
298.1
306.1
312.3
417.1
428.5
436.9
417.9
429.3
437.7
406.1
412.7
417.9
LWT
F
58.4
57.9
57.6
58.7
58.3
57.9
60.4
59.8
59.3
59.3
58.7
58.2
59.3
58.7
58.2
60.4
59.8
59.3
60.1
59.4
58.9
60.1
59.4
58.9
60.5
59.8
59.3
Table PD-36 — SCWD 65 - Economizer Low Capacity - 26,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
163
195
226
50
Total
MBh
420.9
436.1
448.0
531.1
559.7
581.7
678.2
715.9
744.8
482.5
496.2
506.4
535.3
561.0
581.3
676.7
714.3
743.2
551.5
567.1
578.6
564.7
585.6
602.0
675.3
712.8
741.5
45 F
Sensible
MBh
405.9
433.3
438.2
347.9
358.7
367.0
274.0
287.3
297.6
482.5
496.2
506.4
453.2
463.0
470.7
377.8
391.0
401.3
551.5
567.1
578.6
547.6
575.9
582.2
481.4
494.6
504.8
Entering Water Temp
LWT
F
50.2
49.5
49.0
51.5
50.7
50.1
53.3
52.3
51.6
50.9
50.1
49.5
51.6
50.8
50.1
53.3
52.3
51.6
51.8
50.8
50.1
51.9
51.0
50.3
53.3
52.3
51.6
Total
MBh
278.1
285.8
291.4
304.3
317.8
329.0
440.0
464.9
484.1
347.6
357.2
364.2
348.2
358.2
365.8
438.6
463.4
482.5
417.1
428.5
436.9
417.9
429.3
437.7
450.5
470.8
486.9
Performance
Data
65 Ton
Water Cooled
Table PD-37 — SCWD 65 Gross Cooling Capacity - 26,000 cfm, 196 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
75 F
Total
MBh
744
809
879
749
809
878
780
809
877
Sensible
MBh
609
480
351
726
601
471
780
721
592
Water
Flow
gpm
84.1
84.8
85.5
84.1
84.8
85.5
84.5
84.8
85.5
Entering Water Temp
85 F
Water
Total
Sensible
Flow
MBh
MBh
gpm
715
597
93.9
779
468
94.6
845
338
95.4
722
711
94.0
778
589
94.6
844
459
95.4
756
756
94.4
779
708
94.6
844
579
95.4
95 F
Total
MBh
686
746
810
694
746
810
730
747
808
Sensible
MBh
583
455
326
692
576
447
730
695
567
Water
Flow
gpm
103.8
104.5
105.2
104.0
104.5
105.2
104.4
104.5
105.2
Chart PD-47 — Fan Performance for CV or with VFD
Chart PD-48 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
51
72 Ton
Water Cooled
Performance
Data
Table PD-38 — SCWD 72 - Economizer Full Capacity - 28,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
Total
MBh
692.2
719.4
725.9
874.7
925.8
937.7
1117.6
1185.9
1201.8
766.5
787.8
792.8
890.5
934.9
945.5
1114.9
1183.0
1198.9
874.4
896.7
901.7
931.6
969.2
978.2
1118.3
1182.3
1197.5
45 F
Sensible
MBh
640.9
652.3
655.0
537.8
557.8
562.5
443.9
469.3
475.0
749.8
771.1
776.1
689.6
707.0
711.2
589.6
614.7
620.6
874.4
896.7
901.7
850.8
865.7
869.3
737.1
760.6
766.2
Entering Water Temp
LWT
F
52.7
51.7
51.4
54.7
53.6
53.3
57.4
56.0
55.6
53.5
52.3
52.0
54.9
53.7
53.4
57.4
56.0
55.6
54.7
53.3
53.0
55.4
54.0
53.7
57.4
55.9
55.6
Total
MBh
440.0
451.1
453.6
506.6
531.1
537.2
724.9
771.3
782.2
549.8
563.5
566.6
562.1
580.8
585.3
724.9
769.1
779.7
659.4
675.8
679.5
661.3
677.8
681.6
751.4
788.3
797.1
55 F
Sensible
MBh
440.0
451.1
453.6
401.7
410.4
412.5
307.7
323.1
326.7
549.8
563.5
566.6
542.9
573.8
575.4
454.5
469.2
472.7
659.4
675.8
679.5
661.3
677.8
681.6
609.6
621.9
624.8
LWT
F
59.9
59.2
59.0
60.6
59.9
59.8
63.1
62.1
61.9
61.1
60.2
60.0
61.2
60.4
60.2
63.1
62.1
61.9
62.3
61.3
61.0
62.3
61.3
61.0
63.3
62.3
62.1
55 F
Sensible
MBh
297.1
305.3
307.1
286.1
291.0
292.2
207.2
215.6
217.5
371.4
381.5
383.9
372.0
364.5
366.9
319.7
328.0
330.0
445.6
457.8
460.6
446.4
458.6
461.4
436.6
443.4
445.1
LWT
F
58.3
57.8
57.7
58.6
58.1
58.0
60.2
59.6
59.4
59.1
58.5
58.4
59.1
58.5
58.4
60.2
59.5
59.4
60.0
59.2
59.1
60.0
59.2
59.1
60.3
59.6
59.5
Table PD-39 — SCWD 72 - Economizer Low Capacity - 28,000 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
180
216
226
52
Total
MBh
448.3
464.1
467.9
564.0
593.9
601.0
720.0
759.4
768.7
515.6
530.2
533.5
568.5
595.3
601.8
718.5
757.7
767.0
589.3
605.9
609.7
601.1
622.8
628.0
716.9
756.1
765.4
45 F
Sensible
MBh
431.7
447.5
467.4
372.5
383.7
386.4
291.7
305.5
308.8
515.6
530.2
533.5
486.6
496.7
499.1
404.1
417.8
421.1
589.3
605.9
609.7
582.4
619.2
621.2
516.2
529.9
533.2
Entering Water Temp
LWT
F
50.0
49.3
49.1
51.3
50.5
50.3
53.0
52.0
51.8
50.7
49.9
49.7
51.3
50.5
50.3
53.0
52.0
51.8
51.5
50.6
50.4
51.7
50.8
50.6
53.0
52.0
51.8
Total
MBh
297.1
305.3
307.1
323.1
337.1
340.6
466.8
492.8
499.0
371.4
381.5
383.9
372.0
382.2
384.7
465.3
491.2
497.3
445.6
457.8
460.6
446.4
458.6
461.4
478.3
499.3
504.4
Performance
Data
72 Ton
Water Cooled
Table PD-40 — SCWD 72 Gross Cooling Capacity - 28,800 cfm, 216 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
799
868
941
814
868
941
859
874
940
Sensible
MBh
690
536
381
812
681
526
859
819
670
LWT
83.7
84.3
85.0
83.8
84.3
85.0
84.2
84.4
85.0
Total
MBh
768
834
905
787
833
904
832
841
904
Sensible
MBh
675
522
368
788
668
514
832
803
658
95 F
LWT
93.6
94.2
94.9
93.7
94.2
94.8
94.2
94.3
94.8
Total
MBh
735
798
866
758
798
866
802
807
865
Sensible
MBh
660
509
355
758
653
500
802
786
644
LWT
103.4
104.0
104.7
103.7
104.0
104.7
104.1
104.1
104.7
Chart PD-49 — Fan Performance for CV or with VFD
Chart PD-50 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
53
Performance
Data
80 Ton
Water Cooled
Table PD-41 — SCWD 80 - Economizer Full Capacity - 29,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
Total
MBh
719.8
746.6
751.3
915.9
966.0
974.5
1171.5
1238.3
1249.7
794.7
815.5
819.0
929.2
973.1
980.7
1168.7
1235.3
1246.6
906.2
927.8
931.3
969.0
1006.1
1012.5
1170.1
1233.4
1244.3
45 F
Sensible
MBh
663.3
674.5
676.5
559.9
579.6
583.0
464.7
489.6
493.8
777.5
798.2
801.7
715.3
732.5
735.5
614.9
639.5
643.7
906.2
927.8
931.3
880.5
895.3
897.8
766.1
789.5
793.5
Entering Water Temp
LWT
F
52.2
51.2
51.1
54.2
53.1
52.9
56.7
55.3
55.1
52.9
51.8
51.6
54.3
53.1
52.9
56.7
55.3
55.1
54.1
52.7
52.5
54.7
53.4
53.2
56.7
55.3
55.0
Total
MBh
456.0
466.7
468.4
527.8
552.8
557.1
760.6
805.9
813.6
569.7
583.0
585.1
583.4
601.8
605.0
759.4
803.2
810.8
683.3
699.1
701.7
685.2
701.2
703.8
783.6
820.2
826.5
55 F
Sensible
MBh
456.0
466.7
468.4
416.0
424.9
426.4
321.6
336.7
339.3
569.7
583.0
585.1
563.2
592.6
593.8
472.5
487.1
489.6
683.3
699.1
701.7
685.2
701.2
703.8
631.4
643.6
645.7
LWT
F
59.6
58.9
58.8
60.3
59.6
59.5
62.6
61.7
61.6
60.7
59.9
59.7
60.8
60.0
59.9
62.6
61.7
61.5
61.8
60.8
60.7
61.9
60.8
60.7
62.8
61.8
61.7
55 F
Sensible
MBh
307.0
314.9
316.2
294.7
299.7
300.6
215.0
223.2
224.6
383.7
393.5
395.2
384.4
375.9
377.7
330.5
338.7
340.1
460.4
472.2
474.1
461.2
473.0
475.0
450.0
456.6
457.8
LWT
F
58.1
57.6
57.6
58.3
57.9
57.8
59.9
59.3
59.2
58.8
58.3
58.2
58.8
58.3
58.2
59.8
59.3
59.1
59.6
58.9
58.8
59.6
58.9
58.8
60.0
59.3
59.2
Table PD-42 — SCWD 80 - Economizer Low Capacity - 29,800 cfm
Entering Air
EDB
EWB
F
F
62
75
67
72
62
80
67
72
62
85
67
72
Flow
gpm
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
200
240
248
54
Total
MBh
464.0
479.5
482.2
587.4
616.7
621.7
750.3
788.8
795.4
533.0
547.1
549.4
590.6
617.2
621.8
748.7
787.1
793.7
609.1
625.1
627.8
622.3
643.6
647.3
747.1
785.4
791.9
45 F
Sensible
MBh
446.9
462.3
480.6
385.5
396.5
398.4
303.3
316.9
319.2
533.0
547.1
549.4
502.1
512.1
513.9
418.7
432.2
434.5
609.1
625.1
627.8
602.9
637.3
638.7
533.8
547.2
549.5
Entering Water Temp
LWT
F
49.6
49.0
48.9
50.9
50.1
50.0
52.5
51.6
51.4
50.3
49.6
49.4
50.9
50.1
50.0
52.5
51.6
51.4
51.1
50.2
50.1
51.2
50.4
50.2
52.5
51.5
51.4
Total
MBh
307.0
314.9
316.2
334.7
349.2
351.7
486.5
511.9
516.3
383.7
393.5
395.2
384.4
394.3
396.0
484.9
510.2
514.6
460.4
472.2
474.1
461.2
473.0
475.0
496.6
517.0
520.6
80 Ton
Water Cooled
Performance
Data
Table PD-43 — SCWD 80 Gross Cooling Capacity - 29,800 cfm, 240 gpm
Entering Air
EDB
F
75
80
85
EWB
F
62
67
72
62
67
72
62
67
72
Entering Water Temp
85 F
75 F
Total
MBh
891
966
1049
910
967
1048
961
975
1047
Sensible
MBh
761
590
419
896
752
579
947
908
740
LWT
83.7
84.3
85.0
83.8
84.3
85.0
84.3
84.4
85.0
Total
MBh
856
928
1007
880
929
1006
930
938
1006
Sensible
MBh
746
575
405
867
737
565
916
890
725
95 F
LWT
93.6
94.2
94.8
93.8
94.2
94.8
94.2
94.3
94.8
Total
MBh
819
887
963
847
888
963
896
899
963
Sensible
MBh
729
559
389
834
721
550
883
871
710
LWT
103.4
104.0
104.7
103.7
104.0
104.7
104.1
104.1
104.7
Chart PD-51 — Fan Performance for CV or with VFD
Chart PD-52 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
55
Performance
Data
20 Ton
Air Cooled
Table PD-44 — SCRD 20 Gross Cooling Capacity - 10,000 cfm - Air Cooled
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
287.5
313.6
287.3
313.3
341.1
291.4
313.1
340.8
306.9
314.5
340.5
Sen
MBh
191.1
139.5
240.4
188.7
136.8
286.6
237.6
185.6
306.9
285.8
234.2
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
277.4
186.6
266.5
181.9 255.0
176.9
302.6
135.2
290.9
130.6 278.4
125.7
277.4
235.9
266.8
231.1 255.4
226.0
302.4
184.3
290.7
179.7 278.2
174.8
329.2
132.5
316.5
128.1 303.0
123.3
282.3
280.6
272.9
273.1 263.2
263.3
302.1
233.2
290.4
228.6 278.0
223.7
328.9
181.3
316.2
176.8 302.7
172.0
298.1
298.2
288.7
288.7 278.5
278.6
303.9
281.1
292.7
275.9 280.9
270.2
328.6
229.9
316.0
225.3 302.5
220.5
115 F
Tot
Sen
MBh
MBh
242.6
171.7
265.1
120.6
243.4
220.5
264.9
169.7
288.7
118.4
252.7
252.7
264.8
218.5
288.4
167.1
267.6
267.7
268.5
263.6
288.2
215.5
Chart PD-53 — Fan Performance for CV or with VFD
Chart PD-54 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
56
Performance
Data
25 Ton
Air Cooled
Table PD-45 — SCRD 25 Gross Cooling Capacity - 11,600 cfm
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
336.8
367.8
336.5
367.4
400.2
337.8
367.1
399.9
349.9
366.9
399.6
Sen
MBh
214.8
161.8
265.4
212.3
158.7
315.3
262.6
208.8
350.0
312.6
258.8
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
325.2
209.5
312.8 204.0
299.6
198.1
355.1
156.6
341.7 151.1
327.5
145.5
324.9
260.1
312.5 254.5
299.4
248.7
354.8
207.1
341.4 201.6
327.2
195.9
386.5
153.6
372.0 148.3
356.6
142.8
326.7
309.5
315.1 303.1
303.0
296.0
354.5
257.3
341.1 251.8
326.9
246.1
386.2
203.7
371.7 198.4
356.3
192.8
340.3
340.4
329.9 329.9
318.7
318.7
354.5
307.3
341.3 301.6
327.4
295.6
385.9
253.6
371.3 248.2
356.0
242.6
115 F
Tot
Sen
MBh
MBh
285.7
192.0
312.4
139.5
285.5
242.5
312.1
189.9
340.3
137.0
290.7
287.2
311.9
240.0
340.0
187.0
306.7
306.8
312.9
289.1
339.8
236.7
Chart PD-55 — Fan Performance for CV or with VFD
Chart PD-56 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal and heating coil discharge pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
57
Performance
Data
29 Ton
Air Cooled
Table PD-46 — SCRD 29 Gross Cooling Capacity - 12,800 cfm
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
370.7
404.3
371.5
403.9
439.4
379.9
403.9
439.1
400.8
407.3
438.8
Sen
MBh
252.4
181.4
320.3
249.1
177.7
377.1
316.7
245.0
400.9
382.3
312.0
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
356.6
246.3
341.7
239.9 326.1
233.2
388.9
175.4
372.8
169.2 355.9
162.7
357.6
314.0
343.0
307.3 327.8
300.3
388.6
243.1
372.5
236.9 355.6
230.3
422.8
171.9
405.3
165.8 387.0
159.5
367.4
366.5
354.5
354.6 341.1
341.1
388.8
310.6
372.8
304.2 356.1
297.5
422.4
239.1
405.0
233.0 386.7
226.6
388.3
388.4
375.1
375.2 361.1
361.1
392.7
375.3
377.6
367.3 362.5
356.6
422.2
306.0
404.8
299.9 386.7
293.4
115 F
Tot
Sen
MBh
MBh
309.7
226.3
338.2
156.0
311.9
292.7
337.9
223.6
367.9
153.0
326.8
326.8
338.7
290.5
367.6
220.1
346.3
346.3
346.8
344.2
367.7
286.8
Chart PD-57 — Fan Performance for CV or with VFD
Chart PD-58 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
58
Performance
Data
30 Ton
Air Cooled
Table PD-47 — SCRD 30 Gross Cooling Capacity - 14,000 cfm
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
415.4
453.3
415.0
452.9
493.3
417.7
452.6
492.9
435.7
452.7
492.5
Sen
MBh
268.4
200.0
333.7
265.1
196.1
397.5
330.0
260.8
435.8
394.5
325.2
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
401.2
262.0
386.0 255.3
369.6
248.1
437.9
193.7
421.4 187.1
403.8
180.2
400.9
327.3
385.6 320.5
369.3
313.3
437.6
258.9
421.1 252.2
403.4
245.2
476.6
190.1
458.7 183.6
439.7
176.8
404.4
390.3
390.2 382.3
375.4
372.9
437.2
323.7
420.7 317.0
403.1
309.9
476.2
254.7
458.4 248.2
439.3
241.3
423.7
423.7
410.7 410.7
396.7
396.7
437.7
388.0
421.7 381.1
404.7
373.5
475.8
319.0
458.0 312.5
438.9
305.6
115 F
Tot
Sen
MBh
MBh
352.1
240.5
384.9
172.8
352.0
305.6
384.6
237.8
419.4
169.7
360.4
360.8
384.3
302.4
419.0
234.1
381.6
381.6
386.7
365.2
418.7
298.3
Chart PD-59 — Fan Performance for CV or with VFD
Chart PD-60 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
59
Performance
Data
35 Ton
Air Cooled
Table PD-48 — SCRD 35 Gross Cooling Capacity - 15,200 cfm
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
440.9
480.9
441.7
480.6
523.1
450.4
480.4
522.7
476.1
484.2
522.3
Sen
MBh
298.8
215.4
378.7
295.0
211.1
450.2
374.5
290.2
476.2
451.9
369.0
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
424.9
291.9
407.8
284.5 389.6
276.8
463.5
208.6
445.0
201.4 425.4
193.9
425.9
371.6
409.1
364.0 391.4
355.9
463.2
288.2
444.7
281.0 425.0
273.4
504.2
204.5
484.1
197.5 462.9
190.2
436.9
437.0
422.3
422.4 406.7
406.7
463.2
367.6
444.9
360.2 425.5
352.5
503.8
283.5
483.8
276.5 462.5
269.1
462.0
462.1
446.9
446.9 430.7
430.7
467.5
444.2
450.0
435.8 431.7
426.0
503.4
362.2
483.4
355.1 462.3
347.7
115 F
Tot
Sen
MBh
MBh
370.3
268.6
404.5
186.0
372.6
347.1
404.2
265.4
440.4
182.5
389.9
390.0
405.0
344.3
440.1
261.4
413.3
413.3
413.2
413.3
440.1
339.8
Chart PD-61 — Fan Performance for CV or with VFD
Chart PD-62 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
60
Performance
Data
40 Ton
Air Cooled
Table PD-49 — SCRD 40 Gross Cooling Capacity - 18,400 cfm
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
512.1
559.2
512.3
558.7
608.7
522.3
558.2
608.2
548.1
561.3
607.7
Sen
MBh
343.9
249.9
434.1
339.8
245.2
509.6
429.4
334.4
548.2
516.7
423.4
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
493.5
335.8
473.8 327.2
452.9
318.3
539.0
241.9
517.6 233.6
495.0
224.8
494.0
425.8
474.6 417.0
454.1
407.6
538.5
331.8
517.2 323.4
494.6
314.6
586.8
237.4
563.6 229.2
539.0
220.7
505.7
496.5
488.0 482.5
469.3
467.3
538.1
421.3
516.9 412.9
494.5
404.0
586.3
326.6
563.1 318.4
538.6
309.8
532.0
532.0
514.7 514.8
496.2
496.3
542.0
507.6
521.9 497.2
501.4
483.4
585.8
415.5
562.6 407.2
538.1
398.5
115 F
Tot
Sen
MBh
MBh
430.8
308.9
471.1
215.7
432.6
397.5
470.7
305.4
513.2
211.8
449.8
450.1
470.9
394.6
512.8
300.8
476.6
476.6
480.1
467.3
512.4
389.5
Chart PD-63 — Fan Performance for CV or with VFD
Chart PD-64 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
61
Performance
Data
50 Ton
Air Cooled
Table PD-50 — SCRD 50 Gross Cooling Capacity - 23,200 cfm
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
658.4
719.0
657.8
718.4
783.0
667.2
717.8
782.3
703.3
720.3
781.7
Sen
MBh
438.9
320.1
552.9
433.7
314.2
660.8
546.8
426.9
703.4
659.1
539.2
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
633.9
428.2
608.4
417.1 581.6
405.6
692.5
309.7
664.9
298.9 636.0
287.7
633.5
542.1
608.4
531.0 582.2
519.4
692.0
423.2
664.3
412.3 635.4
401.1
754.3
304.0
724.3
293.5 693.1
282.6
645.4
645.5
623.7
623.8 601.1
601.1
691.4
536.3
663.8
525.3 634.9
514.0
753.7
416.7
723.7
406.1 692.5
395.1
682.2
682.3
659.9
660.0 636.5
636.5
694.8
647.9
668.4
635.9 641.1
622.9
753.0
528.9
723.1
518.2 691.9
507.1
115 F
Tot
Sen
MBh
MBh
553.7
393.7
605.8
276.2
555.0
507.1
605.3
389.4
660.5
271.3
577.2
577.3
604.7
502.2
659.9
383.7
611.7
611.8
613.1
608.0
659.3
495.7
Chart PD-65 — Fan Performance for CV or with VFD
Chart PD-66 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
62
Performance
Data
60 Ton
Air Cooled
Table PD-51 — SCRD 60 Gross Cooling Capacity - 29,800 cfm
EDB
F
70
75
80
85
EWB
F
62
67
62
67
72
62
67
72
62
67
72
75 F
Tot
MBh
874.8
954.6
874.6
953.8
1038.1
889.2
953.0
1037.3
939.6
958.7
1036.5
Sen
MBh
591.1
427.0
748.6
583.7
418.6
889.3
739.9
574.2
939.6
895.7
729.2
Entering Ambient Air Temperature
85 F
95 F
105 F
Tot
Sen
Tot
Sen
Tot
Sen
MBh
MBh
MBh
MBh
MBh
MBh
840.5
576.2
804.8 560.8
767.6
544.9
917.3
412.4
878.5 397.4
838.1
381.9
840.9
733.7
805.9 718.3
769.5
702.2
916.5
569.1
877.8 553.9
837.4
538.3
997.7
404.3
955.6 389.7
911.8
374.6
860.2
860.3
829.8 829.9
797.8
797.9
915.8
725.1
877.0 709.8
836.7
694.1
996.9
559.8
954.8 545.0
911.1
529.8
909.5
909.6
877.8 877.9
844.6
844.7
923.0
880.3
886.0 863.8
848.4
845.4
996.1
714.7
954.0 699.7
910.3
684.4
115 F
Tot
Sen
MBh
MBh
728.7
528.5
796.1
366.0
731.9
685.6
795.4
522.2
866.4
359.1
764.2
764.3
795.3
678.0
865.7
514.1
809.7
809.8
809.7
809.8
865.0
668.6
Chart PD-67 — Fan Performance for CV or with VFD
Chart PD-68 — Fan Performance with Inlet Guide Vanes
Notes:
1. Fan curves include refrigerant coil and internal cabinet static losses. To determine static pressure to be used with these curves, add filter,
economizer, flexible horizontal discharge and heating coil pressure drops to external duct static pressure.
2. Based on standard ARI conditions.
63
Steam
Performance
Data
Table PD-52 — Steam Heating Capacity
Unit
Size
20 tons
22 tons
25 tons
29 tons
32 tons
35 tons
38 tons
42 tons
46 tons
52 tons
58 tons
65 tons
72 tons
80 tons
2 psi
Capacity
MBh
257.4
272.2
292.7
317.6
334.7
350.5
365.3
500.5
526.7
563.0
596.3
631.7
663.9
674.7
Airflow
cfm
8000
8800
10000
11600
12800
14000
15200
16800
18400
20800
23200
26000
28800
29800
Based on 60 degree F EAT
64
LAT
F
89.7
88.5
87.0
85.2
84.1
83.1
82.2
87.5
86.4
85.0
83.7
82.4
81.3
80.9
Capacity
MBh
271.6
287.1
308.8
335.1
353.2
369.9
385.4
528.1
555.7
594.1
629.3
666.7
700.7
712.1
5 psi
LAT
F
91.3
90.1
88.5
86.6
85.4
84.4
83.4
89.0
87.8
86.3
85.0
83.6
82.4
82.0
Capacity
MBh
291.6
308.3
331.6
359.9
379.3
397.3
414.0
567.1
596.8
638.1
675.9
716.2
752.8
765.1
10 psi
LAT
F
93.6
92.3
90.6
88.6
87.3
86.2
85.1
91.1
89.9
88.3
86.9
85.4
84.1
83.7
Electrical
Data
Selection Procedures
RLA = Rated Load Amps
Compressor LRA = Locked Rotor Amps
Fan Motor LRA = Locked Rotor Amps,
N.E.C. Table 430 - 150
FLA = Full Load Amps, N.E.C.
Table 430 - 150
Compressor kW = Based on 80/67 F
to evaporator coil, nominal airflow,
and 105 F condensing temperature,
3 phase, 60 Hertz
Fan Motor kW = Based on rated motor
horsepower, 3 phase, 60 Hertz
Voltage utilization range is ±10 percent
Determination of minimum circuit
ampacity (MCA).
MCA = 1.25 x largest motor amps/VFD
amps (FLA or RLA) + the sum of the
remaining motor amps.
Determination of maximum fuse size
(MFS) and maximum circuit breaker
size (MCB).
MFS and MCB = 2.25 x largest motor
amps (FLA or RLA) + the sum of the
remaining motor amps.
If the value of the rating determined
does not equal a standard current rating
of over current protective device, the
marked maximum rating is to be the
next lower standard rating.
Table ED-1 — Number of Compressors per Unit
SCRD
SCWD
10
15
20
20 - 25
2
-
25 - 29
29 - 32
1
1
SCWD
HP
10
15
Kw
10.9
16.1
RLA
33
46
Kw
10.9
16.1
RLA
36.8
61.1
SCRD
HP
10
15
200V
200V
30 - 35
35 - 38
3
-
40
42 - 46
2
1
LRA
269
409
RLA
14.5
20.5
LRA
269
409
RLA
16.3
26
LRA
105
152
193
290
373
469
552
718
-
FLA
7
11
14
19.5
26.5
32.5
38
50
63
LRA
105
152
193
290
373
469
552
718
-
FLA
7.6
13.9
17.6
24.8
31.9
44
44
57.1
68.3
Table ED-2 — Fan without VFD
HP
5
7.5
10
15
20
25
30
40
50
Kw
3.7
5.6
7.5
11.2
14.9
18.6
22.4
29.8
37.3
FLA
16
25
32.9
44.8
60
74
87
113
-
Table ED-3 — Fan with VFD
HP
5
7.5
10
15
20
25
30
40
50
Kw
3.7
5.6
7.5
11.2
14.9
18.6
22.4
29.8
37.3
FLA
21.1
29.4
37.9
51.4
66.5
91.4
91.4
116
-
200V
200V
50
52 - 58
3
460V
460V
460V
460V
Table ED-4 — Electric Heat - Single Stage
SCWD
Size
20
22
25
29
32
35
38
42
46
52
58
65
72
80
SCRD
Size
20
25
29
30
35
40
50
60
Heat
Kw
18
18
18
23
23
27
27
31.5
31.5
39
39
48
48
48
60
80
4
65 - 72
1
3
LRA
117
178
RLA
11.5
16.5
LRA
117
178
RLA
13.2
21.5
LRA
46
66
84
126
162
204
240
312
390
FLA
5.6
8.8
11.2
16
21.2
25.6
30
40
48
LRA
46
66
84
126
162
204
240
312
390
FLA
6.1
9
11
17
22
27
32
41
52
200V
Amps
50
50
50
63.8
63.8
75
75
87.4
87.4
108.3
108.3
133.2
133.2
133.2
575V
LRA
94
143
575V
575V
575V
LRA
94
143
LRA
37
54
66
102
132
162
192
246
312
LRA
37
54
66
102
132
162
192
246
312
460V
Amps
21.7
21.7
21.7
27.7
27.7
32.5
32.5
37.9
37.9
46.9
46.9
57.7
57.7
57.7
Note:
Electric heat amperage should not be considered when determining minimum circuit ampacity. The current of the
unit in the heating mode will not exceed the current of the unit in the cooling mode.
Table ED-5 — CCRB Condenser Electrical Data
Unit Size
Tons
20, 29
35, 40
50, 60
Rated
Voltage
200
460
575
200
460
575
200
460
575
# Fans
4
4
4
6
6
6
8
8
8
FLA (ea.)
4.1
1.8
1.4
4.1
1.8
1.4
4.1
1.8
1.4
Note:
All motors for CCRB units are rated at 1 hp (.7457 kW).
65
LRA (ea.)
20.7
9
7.2
20.7
9
7.2
20.7
9
7.2
MCA
17.43
7.65
5.95
25.63
11.25
8.75
33.83
14.85
11.55
MFS.
MCB
20
15
15
25
15
15
40
15
15
Dimensional
Data
Unit Tons
20-25
29-32
35-38
Unit Tons
20-25
29-32
35-38
A
2' - 3 1/8"
1' - 11 1/8"
1' - 9 1/4"
A
689
587
540
Unit Dimensions - English - (inches)
B
C
D
1' - 10 3/8"
1' - 3 3/8"
2' - 8 3/8"
1' - 8 1/4"
1' - 9 1/2
2' - 8 7/8"
2' - 13/4 "
1' - 5 7/8"
2' - 7 1/2"
B
568
514
654
Unit Dimensions - Metric (mm)
C
D
391
822
543
835
448
800
66
SCWD/SCRD
20 through 38 Ton
E
1' - 10 1/8"
1' - 9 3/8"
2' - 0 1/8"
E
562
543
613
F
3' - 5 3/8"
3' - 5 5/8"
3' - 4 1/4"
F
1051
1057
1022
Dimensional
Data
Unit Tons
42, 46
52, 58
65, 72, 80
Unit Tons
42, 46
52, 58
65, 72, 80
A
2' - 7 1/2"
2' - 7 1/2"
2' - 4 3/4"
A
800
800
730
Unit Dimensions - English - (inches)
B
C
D
2' - 7 3/8"
1' - 5 1/2"
3' - 8 3/8"
2' - 7 3/8"
1' - 5 1/2"
3' - 8 3/8"
2' - 10 1/2"
1' - 5 1/8"
3' - 8 1/8"
B
797
797
876
Unit Dimensions - Metric (mm)
C
D
445
1127
445
1127
435
1121
67
SCWD/SCRD
42 through 80 Ton
E
2' - 7 1/8"
2' - 7 1/8"
2' - 7 5/8"
E
791
791
803
Dimensional
Data
CCRB
(Optional) Low
Ambient Damper
(One Damper Per Circuit)
Refrigerant Line
Connections
AA
Frontal View
AC
AB
CCRB 20 and 29
(Optional) Low
Ambient Damper
(One Damper Per Circuit)
Refrigerant Line
Connections
AA
Frontal View
AC
AB
CCRB 35 and 40
(Optional) Low
Ambient Damper
(One Damper Per Circuit)
Refrigerant Line
Connections
AA
Frontal View
AC
AB
CCRB 50 and 60
68
Dimensional
Data
Unit Tons
CCRB 20, 29
CCRB 35, 40
CCRB 50, 60
Unit Dimensions - English - (inches)
AA
AB
6' - 3 1/4"
7' - 4"
6' - 3 1/4"
10' - 10 3/4"
6' - 3 1/4"
14' - 8"
AC
7' - 4"
7' - 4"
7' - 4"
Unit Tons
CCRB 20, 29
CCRB 35, 40
CCRB 50
CCRB 60
Unit Tons
CCRB 20, 29
CCRB 35, 40
CCRB 50, 60
Unit Dimensions - Metric (mm)
AA
AB
1911.4
2235.2
1911.4
3321.1
1911.4
4470.4
AC
2235.2
2235.2
2235.2
Unit Tons
CCRB 20, 29
CCRB 35, 40
CCRB 50
CCRB 60
CCRB
Refrigerant Connections - English - (inches)
N
P
R
5
5
/8"
1 1/8"
/8"
5
7
/8"
1 1/8"
/8"
5
7
/8"
1 1/8"
/8"
7
7
/8"
1 3/8"
/8"
Refrigerant Connections - Metric (mm)
N
P
R
15.9
28.6
15.9
15.9
28.6
15.9
15.9
28.6
15.9
15.9
34.9
15.9
1
1
1
1
S
1
/8"
3
/8"
3
/8"
3
/8"
S
28.6
34.9
34.9
34.9
N - O.D.
Liquid
R - O.D.
Liquid
P - O.D.
Hot Gas
S - O.D.
Hot Gas
Optional Low
Ambient Damper
Control Panel
F
G
A
H
B
C
J
K (Gas)
Supply Voltage
D
115 Volt Compressor
Interlocks
L (Gas)
E
M
Refrigerant and Electrical Connections
(Front View Looking at Control Panel)
Unit Ton
CCRB 20 - 60
A
5' - 6 7/8"
B
2' - 8 9/16"
C
6 3/8"
D
1' - 0 1/4"
Unit Dimensions - English - (inches)
E
F
G
1' - 3 1/4"
6' - 11 1/2"
6' - 3 1/4"
Unit Ton
CCRB 20 - 60
A
1698.6
B
827.1
C
161.9
D
311.2
Unit Dimensions - Metric (mm)
E
F
G
387.4
2120.9
1911.4
69
H
J
K
5' - 6 7/8" 1' - 4 1/4" 1' - 6 5/8"
H
1698.6
J
412.8
K
473.1
L
M
2' - 2 3/4" 2' - 5"
L
679.5
M
736.6
Dimensional
Data
Heating Coil
Main Control
Panel
C
B
A
D
Hot Water Outlet Connection
E
Notes:
1. All coils are factory mounted, piped,
and wired.
2. All piping connections are 1-1/2”
(38.1mm) female NPT fittings.
Hot Water Inlet Connection
Air Inlet
F
G
H
Hot Water Coil
SCWD 20 - 38
SCWD 42 - 80
SCRD 20 - 35
SCRD 40 - 60
A
60.36
72.91
60.36
72.91
B
82
104.6
82
104.6
Piping Locations For Hot Water Coils - English (inches)
C
D
E
18
12.13
16.68
18
15.94
19.2
18
12.13
16.68
18
15.94
19.2
F
22.5
13.38
22.5
13.38
G
3.62
3.62
3.62
3.62
H
8.25
8.25
8.25
8.25
SCWD 20 - 38
SCWD 42 - 80
SCRD 20 - 35
SCRD 40 - 60
A
1533.1
1851.9
1533.1
1851.9
B
2082.8
2656.8
2082.8
2656.8
Piping Locations For Hot Water Coils - Metric (mm)
C
D
E
457.2
308.1
423.7
457.2
404.9
487.7
457.2
308.1
423.7
457.2
404.9
487.7
F
571.5
339.9
571.5
339.9
G
91.9
91.9
91.9
91.9
H
209.6
209.6
209.6
209.6
Main Control
Panel
C
B
A
Vacuum Trap Connection
D
Condensate Return
Vacuum Trap Connection
E
Steam Inlet Connection
Notes:
1. All coils are factory mounted, piped,
and wired.
2. All piping connections are 1-1/2”
(38.1mm) female NPT fittings.
J
Air Inlet
K
G
F
Condensate Return
H
L
Steam Coil
SCWD 20 - 38
SCWD 42 - 80
SCRD 20 - 35
SCRD 40 - 60
A
60.36
72.91
60.36
72.91
B
82
104.6
82
104.6
C
18
18
18
18
Piping Locations For Steam Coils - English (inches)
D
E
F
G
3
18.7
3.71
5.05
3
21.81
6.69
5.17
3
18.7
3.71
5.05
3
21.81
6.69
5.17
H
22.5
13.38
22.5
13.38
J
4.37
4.37
4.37
4.37
K
1.25
1.25
1.25
1.25
L
8.25
8.25
8.25
8.25
SCWD 20 - 38
SCWD 42 - 80
SCRD 20 - 35
SCRD 40 - 60
A
1533.1
1851.9
1533.1
1851.9
B
2082.8
2656.8
2082.8
2656.8
C
457.2
457.2
457.2
457.2
Piping Locations For Steam Coils - Metric (mm)
D
E
F
G
76.2
475
94.2
128.3
76.2
554
169.9
131.3
76.2
475
94.2
128.3
76.2
554
169.9
131.3
H
571.5
339.9
571.5
339.9
J
111
111
111
111
K
31.8
31.8
31.8
31.8
L
209.6
209.6
209.6
209.6
70
Dimensional
Data
SCWD 20-38
SCWD 42-80
SCWD 20-38
SCWD 42-80
Plenum
Low
Standard
Extended
Low
Standard
Extended
Plenum Dimensions - English - (inches)
A
B
24.625"
5' - 4.875"
32.375"
5' - 4.875"
45"
5' - 4.875"
21.125"
6' - 8.375"
29.25"
6' - 8.375"
45"
6' - 8.375"
C
7' - 11.875"
7' - 11.875"
7' - 11.875"
9' - 11.875"
9' - 11.875"
9' - 11.875"
Weight
325 lbs.
430 lbs.
705 lbs.
390 lbs.
540 lbs.
705 lbs.
Low
Standard
Extended
Low
Standard
Extended
Plenum Dimensions - Metric - (mm)
A
B
616
1647.8
822
1647.8
1143
1647.8
537
2041.5
743
2041.5
1143
2041.5
C
2435
2435
2435
3045
3045
3045
Weight
147.4 kg
195.0 kg
320.0 kg
176.9 kg
244.9 kg
320.0 kg
B
C
A
71
SCWD/SCRD
Service
Clearances
Clearance Requirements
Suggested service/code clearance:
Side
Front
Left
Right
Inlet
Distance
42 in. (1066 mm) (20-38 Ton)
48 in. (1219 mm) (42-80 Ton)
36 in. (914 mm)
18 in. (457 mm)
36 in. (914 mm)
18 in. (457 mm)
Purpose
NEC code requirement
Fan service/removal
Refrigeration and waterside component service
Non VFD
w/ VFD
Provides uniform airflow w/ ducted return
Air Inlet
36” (914.4mm)
Minimum
18” (457.2mm)
Minimum
See Table
Control
Panel
42” (1066.8mm) (20-38 Ton)
Minimum
48” (1219mm) (42-80 Ton)
Top View
SCWD, SCRD
72
CCRB
Service
Clearances
96” (2132 mm)
C
B
48” (1066 mm)
48” (1066 mm)
D
A
Control
Panel
96” (2132 mm)
Top View
CCRB 20, 29
96” (2132 mm)
B
C
F
48” (1066 mm)
48” (1066 mm)
D
E
A
Control
Panel
96” (2132 mm)
Top View
CCRB 35, 40
96” (2132 mm)
G
F
C
B
48” (1066 mm)
48” (1066 mm)
H
D
E
A
Control
Panel
96” (2132 mm)
Top View
CCRB 50, 60
73
Weights
Table W-1 — Unit Weights - SCWD/SCRD
Unit
Size
SCWD
20
22
25
29
32
35
38
42
46
52
58
65
72
80
Base
Weight
lbs.
3010
3010
3080
3300
3490
3610
3710
4560
4650
4970
5220
5430
5550
5940
SCRD
20
25
29
30
35
40
50
60
2920
3140
3330
3370
3470
4410
4980
5620
English
Airside
Economizer
lbs.
430
430
430
500
500
500
500
640
640
700
700
800
800
800
2-Row
Waterside
Economizer
lbs.
140
140
140
190
190
280
280
255
255
335
335
335
335
335
4-Row
Waterside
Economizer
lbs.
340
340
340
390
390
505
505
505
505
665
665
665
665
665
Heating
Coil Box
lbs.
460
460
460
460
460
460
460
600
600
600
600
600
600
600
VFD
lbs.
130
130
130
130
130
130
130
130
130
155
155
155
155
155
VFD w/
Bypass
lbs.
155
155
155
155
155
155
155
155
155
180
180
180
180
180
430
500
500
500
500
640
700
800
140
190
190
280
280
255
335
335
340
390
390
505
505
505
665
665
460
460
460
460
460
600
600
600
130
130
130
130
130
155
155
155
155
155
155
155
155
180
180
180
Notes:
1. All unit weights include refrigerant, water, inlet guide vanes and controllers, electric heat and valves.
2. Add 150 lbs. to total weight to obtain approximate shipping weight.
3. VFD weights are based on maximum horsepower available for the unit size.
4. Flexible horizontal discharge plenum option weights:
45-inch plenum = 705 lbs.
Standard height plenum = 430 lbs.
Low height plenum = 325 lbs.
Table W-2 — Unit Weights - CCRB
Unit
Size
CCRB 20
CCRB 29
CCRB 32
CCRB 35
CCRB 40
CCRB 50
CCRB 60
Shipping
Weight
lbs.
2030
2084
2138
3018
3072
3995
4275
Operating
Weight
lbs.
1906
1960
2014
2833
2887
3695
3975
74
Weights
Table W-3 — Unit Weights - SCWD/SCRD
Unit
Size
SCWD
20
22
25
29
32
35
38
42
46
52
58
65
72
80
Base
Weight
Kg
1365
1365
1400
1500
1585
1640
1685
2070
2110
2255
2365
2465
2520
2695
SCRD
20
25
29
30
35
40
50
60
1325
1425
1510
1530
1575
2000
2260
2550
Metric
Airside
Economizer
Kg
195
195
195
225
225
225
225
290
290
315
315
360
360
360
2-Row
Waterside
Economizer
Kg
65
65
65
85
85
130
130
115
115
150
150
150
150
150
4-Row
Waterside
Economizer
Kg
155
155
155
175
175
230
230
230
230
300
300
300
300
300
Heating
Coil Box
Kg
210
210
210
210
210
210
210
270
270
270
270
270
270
270
VFD
Kg
59
59
59
59
59
59
59
59
59
70
70
70
70
70
VFD w/
Bypass
Kg
70
70
70
70
70
70
70
70
70
82
82
82
82
82
195
225
225
225
225
290
315
360
65
85
85
130
130
115
150
150
155
175
175
230
230
230
300
300
210
210
210
210
210
270
270
270
59
59
59
59
59
70
70
70
70
70
70
70
70
82
82
82
Notes:
1. All unit weights include refrigerant, water, inlet guide vanes and controllers, electric heat and valves.
2. Add 68 kg. to total weight to obtain approximate shipping weight.
3. VFD weights are based on maximum horsepower available for the unit size.
4. Flexible horizontal discharge plenum option weights:
45-inch plenum = 320 kg
Standard height plenum = 195 kg
Low height plenum = 150 kg
Table W-4 — Unit Weights - CCRB
Unit
Size
CCRB 20
CCRB 29
CCRB 32
CCRB 35
CCRB 40
CCRB 50
CCRB 60
Shipping
Weight
Kg
920
945
970
1370
1395
1810
1940
Operating
Weight
Kg
865
890
915
1285
1310
1675
1805
75
Standard Control Features
Unit Switch
Each self-contained unit has a unit
switch to set the unit control mode. The
switch is located on the unit control
module (UCM) front panel and is
accessible without opening or removing
any unit panels.
The unit switch has three positions:
1. Auto Local—Unit operates as a standalone unit. The UCM controls the unit in
response to sensor inputs. Even if the
unit is tied to Tracer®, it will not override
local control. However, Tracer can
access the unit and read data.
2. Auto Remote—UCM controls the unit,
but can interface with Tracer to override
local control. It can also interface with a
generic BAS .
3.Stop/Reset— All unit control
operations shut down and all outputs set
to their de-energized state. All UCM
internal information sets to its initialized
value, except for diagnostic information
that is not cleared until the unit switches
back into the auto mode.
The unit is manually reset whenever the
switch is moved to the stop/reset
position from either the auto/local or
auto/remote mode. The unit also resets
whenever power cycles to the UCM. In
this case, all diagnostic information is
reset.
Digital Display
The UCM contains a digital display to
show operating conditions, setpoints,
and diagnostics. The display is on the
UCM front panel and is visible without
opening any panels. Refer to Table C-1
for the operating and diagnostic code
list.
The advance display allows the user to
step through the operating codes,
diagnostic codes, and setpoint display.
The unit normally displays the current
operating mode continuously. However,
when a malfunction exists that causes
the entire unit to shut down, the display
alternates between the operating code
at the time of failure and the last
diagnostic code. When a malfunction
exists that does not shut down the
entire unit, the operating code will flash
to indicate that a failure has been
detected.
Diagnostics
Refer to Table C-1 for a detailed list of
the diagnostic codes.
The UCM retains a diagnostic code
history, which can be read on the
display using the display advance
Controls
CV and VAV
button. Diagnostics inform operators or
maintenance personnel of unit
malfunctions.
accept a 4-10 milliamp or 2-10 volt
electronic signal. This signal can be
provided by Tracer or other building
automation system.
A list of malfunctions that require
manual reset to resume unit operation
and clear the diagnostic code follow:
• Supply fan off due to running current
overload, short circuit, duct static
pressure loss, or high duct pressure.
• Input voltage phase reversal or phase
loss.
Alarm Contact Closure
The alarm contact closure output
energizes in the event of any
malfunction that normally initiates a
diagnostic code display. Refer to Table
C-1 for a complete diagnostic code list.
Also, these additional diagnostics are
included:
• Sensor failure: supply air temperature
• Operation of the entering air
• Entering air high temperature option.
• Loss of condenser water flow, if using
the water flow switch option
out of range (low temperature).
The following malfunctions require
manual reset to re-enable the affected
compressor circuit and clear the
diagnostic code:
• Compressor(s) off due to running
current overload or short circuit.
• Compressor(s) off via high or low
pressure cutouts.
• Compressor(s) off due to high motor or
high refrigerant discharge temperature,
or low evaporator suction temperature.
All other diagnostic conditions do not
normally result in unit or circuit shut
down. The diagnostic resets
automatically when the condition is
corrected.
Supply Fan
The supply fan is off in the stop/reset
mode. The fan runs continuously when
using the fan on ventilate function and in
occupied mode, and cycles in support of
building heat loads during night heat
mode operation.
Step Control
The steps of mechanical cooling are
controlled based on supply air
temperature for VAV units and on zone
temperature for CV units. Refer to the
general data section on pages 16-18 for
number of unit capacity control steps.
The control system logic permits
compressor operation only after supply
fan operation is called for. Compressors
will not operate if the supply fan is off.
Also, compressors will not operate
when condenser entering water
temperature is below 55 F or below
35 F on units with condensing pressure
control valve or waterside economizer.
Remote Supply Air Setpoint
Adjustment Option
On VAV units, the supply air setpoint can
be set or adjusted remotely. The unit
contains a pair of terminals that will
76
temperature sensor
Setpoints
Cooling: The cooling setpoint is
adjustable at the UCM from 50 to 90
degrees F.
Heating: The heating setpoint is
adjustable at the UCM from 40 to 90
degrees F.
Fan On/Ventilate
A pair of field accessible terminals
energize the ventilation functions. When
the connection between them closes,
the fan starts, the airside economizer
fresh air damper option drives full open,
and the ventilate output energizes. The
unit controls the inlet guide vanes or
variable frequency drive options in an
attempt to maintain the supply air
pressure setpoint.
This input will override the external
interlock auto/stop input. It will also
override Tracer inputs when energizing
the ventilation functions. However, both
Tracer input and fan on/ventilate input
must be off to terminate the fan on/
ventilate mode.
During the fan on/ventilate mode all
cooling and heating functions are locked
out. Manual reset is not required to
restore normal operation. The unit
switch will override this input when it is
in the stop/reset position.
Controls
Waterside Economizer
The waterside economizer will take
advantage of cooling tower water to
either precool the entering air to aid the
mechanical cooling process or, if the
water temperature is low enough,
provide total system cooling.
CV and VAV
Table C-1—Operating States and Diagnostics List
Operating State Description
Reset
Stop
Auto
Pre-Fan
Pre-Cool
Low Air Temp Protection
Maximum Ventilation
Supply Fan On
Economizing
Code
88
00
01
04
0C
05
06
07
10
Diagnostic Description
High Pressure Cutout Circuit 1
High Pressure Cutout Circuit 2
High Pressure Cutout Circuit 3
High Pressure Cutout Circuit 4
Code
F5
F6
bE
bF
Overload Trip Compressor A
Overload Trip Compressor B
Overload Trip Compressor C
Overload Trip Compressor D
bA
bb
bC
bd
Cooling Level 1
Cooling Level 2
Cooling Level 3
Cooling Level 4
21
22
23
24
Hi Motor Winding Temp Cprsr A
Hi Motor Winding Temp Cprsr B
Hi Motor Winding Temp Cprsr C
Hi Motor Winding Temp Cprsr D
C1
C2
C3
C4
Econ/Cooling Level 1
Econ/Cooling Level 2
Econ/Cooling Level 3
Econ/Cooling Level 4
31
32
33
34
Morning Warmup
40
Dirty Filter
Heat
d0
d1
Heat
41
Supply Fan Overload Trip
Supply Fan High Duct Pressure
CE
dA
Diagnostic Description
Zone Sensor
Supply Air Sensor
Morning Warmup Sensor
Code
A0
A2
97
Phase Reversal/Phase Loss
Condenser Water Flow
Condenser Water Low Temp
E6
F7
C9
Modulating Standard Control for
Constant Water Flow
In economizing control, whenever the
entering water temperature is at least 8
degrees F below the return air
temperature, the economizer function
enables and water routes through the
economizer first, and then through the
condenser. The economizer acts as the
first stage of cooling. If the economizer is
unable to maintain the supply air
setpoint, the UCM will bring on
compressors as required to meet
setpoint.
Temperature Reset Sensor
Ent Cond Water Temp Sensor
Leaving Cond Water Temp Sensor
Entr Econ Water Temp Sensor
Unit Communication
Evap Suction Temp Circuit 1
Evap Suction Temp Circuit 2
Evap Suction Temp Circuit 3
Evap Suction Temp Circuit 4
Contactor Compressor D
Low Pressure Cutout Circuit 1
Low Pressure Cutout Circuit 2
Low Pressure Cutout Circuit 3
Low Pressure Cutout Circuit 4
98
9A
9b
99
dF
9C
9D
9E
9F
Cd
b5
b6
b7
b8
Entering Air Low Temperature
Entering Air High Temperature
CF
FE
Controller
FF
Contactor Compressor A
Contactor Compressor B
Contactor Compressor C
CA
Cb
CC
Improper Compresser Config.
Unit I.D.
F8
When the economizer acts as the first
cooling stage, and the compressor(s)
are not operating, water flow modulates
through the economizer in response to
supply air temperature on VAV units
and in response to zone temperature on
CV units. Since the economizer valve
and bypass valve are proportional, full
water flow through the unit is always
maintained. If the entering water
temperature is not at least 4 degrees F
below the return air temperature, the
economizer function is disabled, the
economizer valve closes, and water
routes through the condenser only.
valves are initially in this position until
the UCM enables the economizer
function.
The waterside economizer acts as the
first stage of cooling. If the economizer is
unable to maintain the supply air
setpoint, the UCM will bring on
compressors as required to meet the
setpoint. If the unit does not include an
economizer, mechanical cooling only is
used to satisfy cooling requirements.
All economizer control valves, piping
between the economizer and the
condenser, and all wiring are factory
installed and tested. All piping and
control valves are located within the unit
enclosure, and all water connections
and controls are located on the left side
of the unit. Service access for cleaning is
provided by removing panels on the left
side of the unit.
Waterside economizer flow is controlled
by two valves; one on the economizer
inlet and one which bypasses water
around the economizer. See Figure
AC-3 on page 10. Whenever the supply
fan is off, the bypass water valve is fully
open and the economizer valve fully
closes. Whenever the unit starts, the
Modulating Energy Saving Control for
Variable Water Flow
This helps provide pump energy
savings. The control works the same
way as modulating standard control
with the following exceptions:
• Whenever the unit is not in cooling
mode, or is shut off, both control valves
close to prevent water flow through the
unit.
• The valves are not proportional. When
the economizer valve is active, the
bypass valve closes. If the economizer
valve modulates, then water flow
through the unit modulates. If the water
is cool enough for economizing but
mechanical cooling is also required, the
economizer valve fully opens to
77
establish full water flow through the
condensers.
Whenever the water is too warm for
economizing, and there is a call for
cooling, then the economizer valve fully
closes and the bypass valve fully opens
to establish full water flow through the
condensers.
Airside Economizer
The airside economizer takes
advantage of cool fresh air to either
precool the entering air to aid the
mechanical cooling process or, if the
fresh air temperature is low enough,
provide total system cooling.
An enthalpy control senses fresh air
conditions. When conditions are suitable
for cooling by economizer, the enthalpy
control will permit the economizer to
function as the first stage of cooling. The
damper position modulates in response
to supply air temperature on VAV units
and to the zone temperature sensor on
CV units to maintain supply air setpoint
or zone temperature setpoint
respectively. If additional cooling is
required, compressor operation begins.
When fresh air conditions are not
suitable for economizer cooling, the
enthalpy control will disable the
economizer function and return the
fresh air damper to the minimum open
position.
The airside economizer option consists
of two parts: the control section within
the unit, which is factory installed, and
the mixing box, which is external to the
unit and is field installed.
The filter mixing box actuator and
linkage is a one piece assembly.
Actuator and linkage are located on the
left side of the mixing box (when viewed
from the control panel side of the unit).
The mixing box is field-installed.
Controls
CV and VAV
the reset reference setpoint to 8
degrees F for every 1 degree drop
below the reset reference setpoint.
day and night modes of heat based on
the day heat/morning warmup setpoint.
A zone temperature sensor to sense
when the space temperature falls below
the reset reference setpoint is shipped
with the unit for field installation in the
remote space.
Frost Protection Control
Due to the unique design of the UCM
and the 3D® scroll compressor, frost
protection is provided without the use of
inefficient hot gas bypass.
Frosting is controlled by measuring
suction temperature on each circuit. If
the suction temperature falls below 28
degrees F for the required time, that
circuit is turned off and another circuit is
brought on line to handle the load. The
first circuit remains off until the
temperature rises above 34 degrees F
for the required time, and can be
brought back on line as required.
Programmable Night Heat Morning
Warmup Control
This option provides comprehensive
cooling and heating controls using the
UCM’s microprocessor logic along with
a unit mounted programmable timer.
With this control option the unit is
capable of operating in four modes:
1. Unoccupied night heat mode
2. Morning warmup mode
3. Occupied heating mode
4. Occupied cooling mode
The mixing box contains two sets of
dampers, one for fresh air and one for
return air. Configurations available
include top and back, bottom and back,
and top and bottom.
In all modes, the inlet guide vane option
is driven to the fully closed position
when the fan is off. When the fan is on,
the inlet guide vanes modulate in
response to supply air static pressure.
External Interlock Auto/Stop
A pair of field accessible terminals
causes the unit to shutdown when the
connection between them is open. Unit
operation restores when the connection
is remade. The shutdown is similar to
placing the unit switch in the stop/reset
position.
Two separate zone temperature
sensors ship with VAV units for field
installation. One sensor is provided to
sense the night heat temperature level.
The other sensor is for morning
warmup/occupied heat temperature
control. Both setpoints are adjustable
from 40 to 90 degrees F at the UCM.
Sensors are to be field installed in the
conditioned space or mechanical
equipment room as required.
Setpoint Reset Option
On VAV units, supply air temperature
setpoint can be reset upward as the
space temperature drops below a
preset point called the reset reference
setpoint. This setpoint can be set in a
range from 60 to 80 degrees F. The
amount that the supply air temperature
is reset upward is based on a setting
called the reset gain. This setting can be
adjusted to allow the supply air
temperature to be reset upward from 1
degree F for every 1 degree drop below
CV units use the standard zone cooling
temperature sensor to sense
temperature. Separate setpoints are
provided for night heat, day heat/
morning warmup, and zone cooling. The
morning warmup setpoint is the same
as the day heat setpoint. The night heat
setpoint setting must be less than the
day heat/morning warmup setpoint
setting. If not, the UCM will control both
78
The operation of each mode is
described below:
1. Unoccupied night heat mode
This mode is initiated by the
programmable timer. The UCM will
respond as follows:
• An unoccupied output, which is a set of
normally open and normally closed
contacts, is energized.
• A ventilation output, which is a set of
normally open and normally closed
contacts, is de-energized. This can be
used to close a fresh air damper.
• The supply air fan and heat relay
contact closure output, which is a set of
normally open and normally closed
contacts, are cycled on and off in
response to a demand for heat based
on the zone temperature setting.
• The airside economizer fresh air
damper option is fully closed.
• The heat/cool mode output, which is a
set of normally open and normally
closed contacts, is energized. This can
be used to put the VAV boxes in heating
mode.
• Water flow throughout the waterside
economizer option is shut off.
• The economizer and mechanical cooling
functions are disabled.
• The cooling tower/condenser water
pump output, which is a set of normally
open and normally closed contacts, is
de-energized.
2. Morning Warmup Mode
This mode is initiated by the
programmable timer. The fan and heat
output is energized until the morning
warmup temperature setpoint is
reached. All other conditions remain the
same as in the unoccupied night heat
mode.
When the morning warmup
temperature setpoint is reached, the
unit will switch over to the occupied
heating mode.
If no heat is required in the morning
warmup mode, the unit will go directly
into the occupied heating mode.
3. Occupied Heating Mode
This mode provides a transition
between morning warmup and the
occupied cool mode. In this mode, the
unit will function as follows:
• The supply air fan is on continuously.
• The heat relay output is de-energized.
Controls
CV and VAV
input, a set of terminals, is provided to
switch the unit into the unoccupied
mode. The unit control is accomplished
as follows:
Operating Modes
The following modes can be initiated or
changed by the Tracer system:
• The unoccupied output is de-energized.
• The ventilation output is energized.
• The night heat mode is activated by a
switch or contact closure to the
• The airside economizer fresh air
damper option is open to minimum
position.
• The heat/cool mode output remains
energized.
• Water flow through the waterside
economizer option remains shut off.
• The economizer and mechanical cooling
functions remain disabled.
• The cooling tower/condenser water
pump interlock output remains
de-energized.
If the conditioned zone temperature
drops 2 degrees F below the morning
warmup setpoint setting, the heat relay
cycles to maintain zone temperature.
If the conditioned zone temperature
rises 3 degrees F above the morning
warmup setpoint setting, the unit will
switch over to occupied cooling mode.
At this point, the heating cycle will lock
out until the next night setback/morning
warmup cycle initiates.
With the factory-installed electric heat
option, the controls are all prewired to
the heat relay output. With a steam or
hot water coil, the heating controls must
be field wired to the heat relay output.
4. Occupied Cooling Mode
The occupied cooling mode state begins
when the conditioned zone temperature
rises 3 degrees F plus maximum control
overshoot above the morning warmup
setpoint setting. The UCM conditions are
as follows:
• The heat/cool mode output is deenergized.
• The economizer and mechanical cooling
functions are permitted to operate in
response to limit controls and supply air
temperature.
• The cooling tower/condenser water
pump interlock output cycles on and off
based on the need for cooling.
• The supply air fan is on continuously.
• The airside economizer fresh air
damper option is open to its minimum
position or greater.
Night Heat /Morning Warmup Control
This control option is identical to the
programmable night heat morning
warmup control described above
except that the programmable timer is
not provided. Therefore, an unoccupied
unoccupied input.
• The morning warmup mode is initiated
by a switch or contact opening to the
occupied mode.
• When the morning warmup
temperature setpoint is reached, the
unit will switch over to the occupied
heating mode.
• The occupied cooling mode state begins
when the conditioned zone temperature
rises 3 degrees F above the morning
warmup setpoint setting. The system
must progress through the unoccupied
mode to return to the occupied heating
mode.
Integrated Comfort™ System Interface
All self-contained units will interface
with Tracer® building automation
system through a two-wire serial data
link. Tracer provides external signals to
the UCM in a supervisory role to
coordinate the self-contained unit
operation with the rest of the building
HVAC system.
System Operation
For Tracer to act in a supervisory role,
the unit switch must be in the auto
remote position. If the unit switch is in
either auto local or stop/reset positions,
Tracer can interrogate the unit and
gather information, but cannot control
the unit. Tracer system inputs to the unit
will be stored but not used.
This option includes nonvolatile
memory to hold in storage certain
setpoints, data, and diagnostic codes in
the event of a power outage or failure of
the serial data link.
Communications Link
The communication link between Tracer
and the self-contained unit is provided
by a single twisted pair of wires. The
self-contained units can be daisychained
together with this single shielded
twisted pair of wires resulting in
substantially less installation cost than
conventional “hardwired” energy
management systems. The Tracer 100
system will accommodate a maximum
of 12 self-contained units and up to eight
Tracer 100 units can be linked to form a
system capable of handling up to 96
self-contained units. The Tracer
Summit® will accommodate up to 20
units per building control unit (BCU).
79
• Auto/Stop—Auto puts the self-
contained unit into operation responding
to internal (UCM) and external (Tracer)
control inputs. Stop shuts down the unit.
In addition, a hardwired input to the
external interlock auto/stop may be
used.
• Occupied/Unoccupied—The Tracer
system directs the UCM to operate in
the programmable night heat morning
warmup mode. The unit will operate in
the manner described above in the
programmable night heat morning
warmup control section with the Tracer
system acting as the time clock. The
night heat/morning warmup override
function is available but the UCM will not
respond to the override signal unless
authorized by the Tracer system.
• Fan On Ventilate—In this mode the fan
is started, the ventilate output
energized, and the airside economizer
fresh air damper option drives full open.
The cooling and heating functions are
locked out. A hardwired fan on ventilate
input may also be used.
• Setpoints—All self-contained units have
the Integrated Comfort System (ICS)
interface that allows the following
setpoints to be set from the Tracer:
• Supply air temperature on VAV units.
• Day cooling on CV units
• Supply air pressure on VAV units with
inlet guide vanes
• Morning warmup or day heat
• Airside economizer minimum position
• Night heat
• Default supply air temperature on VAV
units
• Default day cooling on CV units
• Default supply air pressure on VAV units
with inlet guide vanes
All of the above items are stored in
nonvolatile memory.
• Status Monitoring—The ICS interface
provides an extensive monitoring
capability that allows building operators
and maintenance personnel easy
access to a host of unit status and
operating information at the Tracer
work station. All of the diagnostic and
operating state displays available at the
UCM digital readout are available
through Tracer. Refer to Table C-1. In
addition, there are several more points
Controls
CV and VAV
of information available through Tracer.
Included are:
closed position upon supply fan
shutdown if unit power is on. Inlet vanes
close whenever the fan starts and will
modulate in response to supply air static
pressure.
•Compressor on/off status
•Ventilation status
•Condenser water flow status
•Percent FLA supply fan
•Heat status
•Heat hours and starts
•Each compressor operating hours
•Each compressor starts
•Supply fan operating hours
•Supply fan starts
•Percent RLA of each compressor
•Supply air pressure
•Supply air temperature
•Suction temperature of each circuit
•Entering condenser water temperature
•Leaving condenser water temperature
•Supply air temperature reset signal
•Morning warmup sensor temperature
•Entering air temperature
Time Clock
A programmable timer is supplied with
this option and wired to the unoccupied
input to provide on/off control of the unit.
The timer is factory mounted and is
accessible without opening any unit
panels.
The timer is a seven day timer with a
minimum of 4 operations per day (two
on and two off). The timer has a
permanent built-in rechargeable battery
backup system.
UCM
The UCM is programmed at the factory
to provide complete control of the unit
operation in all standard and optional
operating modes. This control logic is an
integral part of the unit microprocessor
and cannot be modified. Table CF-2
illustrates the status of the control
outputs during each of the unit
operating modes.
Inlet Guide Vane Control
The inlet guide vanes are factory
installed complete with electric actuator,
linkage, and static pressure controller.
The duct static pressure sensing probe
is shipped loose for field installation.
Field supplied 1/4-inch O.D. plastic tubing
is installed between the probe and the
unit mounted static pressure controller.
Inlet guide vanes are controlled by the
supply air static pressure sensor in the
UCM. The inlet vanes move to the
80
The static pressure controller setpoint
and control band can be field adjusted
using the adjustment knob on the
control panel.
Variable Frequency Drive (VFD) Control
Variable frequency drives are driven by
a modulating 0-10 vdc signal from the
UCM. A pressure transducer measures
duct static pressure, and the VFD
adjusts the fan speed to maintain the
supply air static pressure within an
adjustable user-defined range. The
range is determined by the supply air
pressure setpoint and supply air
pressure high static limit, which are set
with the UCM.
Variable frequency drives provide
supply fan motor speed modulation. The
drives will accelerate or decelerate as
required to maintain the supply static
pressure setpoint.
Bypass control is offered as an option to
provide full nominal airflow in the event
of drive failure. Manual bypass is
initiated at the unit control panel. When
in the bypass mode, VAV boxes will
need to be fully opened.
Supply Air Static Pressure Limit
The opening of the inlet guide vanes and
VAV boxes are coordinated during unit
start up and transition to/from occupied/
unoccupied modes to prevent
overpressurization of the supply air
ductwork. However, if for any reason
the supply air pressure exceeds the
user-defined supply air pressure high
static limit that was set at the UCM, the
supply fan/VFD is shut down and the
inlet guide vanes (if included) are closed.
The unit is then allowed to restart three
times. If the overpressurization condition
occurs on the third restart, the unit is
shut down and a manual reset
diagnostic is set and displays.
Controls
CV and VAV
Table CF-2—Control Ouput Status
Operating Modes
Control
Ouputs
When
Available
Unocupied
Night
Heat
Supply
Fan
Mechanical
Cooling
Waterside
Economizer
Airside
Economizer
Standard
Enabled
On
On
On
Standard
Disabled
Disabled
Disabled
Optional
Disabled
Disabled
Optional
Disabled
Optional
NHMW
and
ICS
NHMW
and/or
ICS
NHMW
and/or
ICS
NHMW
and/or
ICS
NHMW
and/or
ICS
Inlet
Guide
Vanes
Unoccupied
Output
Ventilation
Output
Heat/Cool
Output
Heat
Relay
Ouput
Condenser
Waterloop
Interlock
Output
Stop
Fan
On
Ventilate
Freeze
Protect
On
Off
On
Off
Enabled
Enabled
Disbled
Disabled
Disabled
Enabled
Enabled
Disabled
Disabled
Full Flow
Disabled
Set to
Minimum
Position
Enabled
Enabled
Closed
Full Open
Closed
Enabled
Enabled
Enabled
Enabled
Enabled
Closed
Enabled
Closed
Energized
Energized
De-energized
De-energized De-energized De-energized De-energized
Energized
De-energized
De-energized
Energized
Energized
Energized
De-energized
Energized
De-energized
Energized
Energized
Energized
De-energized
De-energized
De-energized
De-energized
De-energized
Enabled
Enabled
Energized
De-energized
De-energized
De-energized
De-energized
De-energized
De-energized
De-energized
De-energized
Energized
Energized
De-energized
De-energized
Energized
Morning
Warmup
Occupied
Heating
Occupied
Cooling
Timed
Override
81
Disabled
Options
VAV Supply Air Temperature
Control with Inlet Guide Vanes
Inlet guide vanes are among the most
efficient and cost efective means of
providing airflow modulation in VAV
systems. Trane patented inlet guide
vanes have proven reliability with
thousands of installations in selfcontained units, Climate Changer® air
handlers, and VAV rooftop units.
The inlet guide vanes are factory
installed complete with electric actuator,
linkage, and static pressure controller.
The inlet guide vanes are controlled by
the supply air static pressure controller,
which is part of the UCM. The inlet
vanes close when the supply fan shuts
down or if unit power is on. Inlet vanes
will close whenever the fan starts and
will modulate in response to supply air
static pressure.
The static pressure controller offers field
adjustment of the setpoint and control
band by means of an adjustment knob
on the control panel.
Inlet Guide Vanes
VAV Supply Air Temperature Control
With Variable Frequency Drive without
Bypass
This option is provided with all the
necessary controls to operate a VAV
self-contained unit from the discharge
air temperature and discharge air
sensor. The microprocessor-based
controller coordinates the economizer
control and the stages of cooling with
supply air reset capabilities. Includes
factory installed, wired and tested
variable frequency drive (VFD) to
provide supply fan motor speed
modulation. VFD receives 0-10vdc
signal from the unit microprocessor
based upon supply static pressure and
causes the drive to accelerate or
decelerate as required to maintain the
supply static pressure setpoint.
The duct pressure sensing probe is
shipped loose for field installation. Field
supplied 1 /4-inch O.D. plastic tubing is to
be installed between the probe and the
unit mounted static pressure controller.
Waterside Economizer
The waterside economizer takes
advantage of cooling tower water to
either pre-cool the entering air to aid the
mechanical cooling process or, if the
water temperature is low enough,
provide total system cooling.
The waterside economizer includes a
coil, modulating valves, controls and
piping with cleanouts. All components
are factory installed in the unit cabinet.
The coil is constructed of ½-inch (13mm)
OD seamless copper tubes expanded
into aluminum fins. A common sloped
drain pan for the evaporator and
economizer coils is fabricated of
galvanized or stainless steel, insulated
and internally trapped.
The waterside economizer coil has two
or four rows with no more than 12 fins
per inch. The tubes are arranged in a
staggered pattern to maximize heat
transfer. The coil has round copper
supply and return headers with
removable cleanout and vent plugs. The
optional mechanical cleanable
economizer has removable cast iron
headers to allow ease of mechanical
cleaning of the tubes. The waterside
working pressure is rated for 400 psig
(2758 kPa).
Variable Frequency Drive
VAV Supply Air Temperature Control
With Variable Frequency Drive with
Bypass
Manual bypass control provides full
nominal airflow in the event of drive
failure.
82
Side View of Unit with Waterside
Economizer with Removable Headers
Options
Airside Economizer
The airside economizer will take
advantage of fresh air to either pre-cool
the entering air to aid the mechanical
cooling process or, if the fresh air
temperature is low enough, provide
total system cooling. An outside dry
bulb sensor and an enthalpy sensor
senses fresh air conditions. When the
outdoor conditions are suitable for
cooling by economizer, the unit
controller will permit the economizer to
function as the first stage of cooling. The
damper position is modulated in
response to supply air setpoint. If
additional cooling is required,
compressor operation is initiated. When
outdoor conditions are not suitable for
cooling by the economizer, the unit
controller will disable the economizer
function and return the fresh air damper
to the minimum position setting.
The mixing box is fabricated from
16-gauge galvanized steel and is
painted with a one mil coat of alkyd
enamel paint. Opposed low leak
damper blades are fabricated from
16-gauge galvanized steel and rotate on
rustproof nylon bushings. A factory
installed 24V actuator controls the
position of both dampers. The enthalpy
sensor is factory provided for field
installation.
Condensing Pressure Control Valve
This option is available when the unit
does not have a waterside economizer.
A two-way modulating control valve is
wired and installed in the unit. It
maintains a specific range of water
temperature rise through the condenser
when entering fluid temperature is less
than 58 F (15 C). This option allows the
compressor to operate with entering
fluid temperature down to 35 F (2 C).
This valve is driven closed if the unit
shuts down or if a power failure occurs.
air temperature setpoint. As the
economizer valve opens, the condenser
bypass valve closes, and vice versa. Full
water flow is always maintained
through the condensers. Both valves
will close in the event of a power failure.
Modulating Energy Saving Control
Variable Water Flow - Two, two-way
modulating control shutoff valves are
wired, controlled and installed in the
unit. One valve is located in the
economizer’s water inlet, and the other
is located in the condenser bypass
water inlet. When the economizer valve
is active, the condenser bypass valve is
closed. The economizer valve
modulates, thus water flow through the
unit is modulated. If the water is cool
enough for economizing but mechanical
cooling is also required, the economizer
valve is fully open, establishing full
water flow through the condensers.
Whenever the water is too warm for
economizing, and there is a call for
cooling, the economizer valve drives
fully closed and the bypass valve drives
fully open, establishing full water flow
through the condensers. Full water flow
is always maintained through the
condensers when mechanical cooling is
required. Both valves will close
whenever cooling is not required, and in
the event of a power failure.
Water Flow Switch
A water flow switch is factory installed
in the condenser water pipe within the
cabinet. Whenever a water flow loss is
detected by the flow switch prior to or
during mechanical cooling, the
compressor operation is locked out and
a diagnostic code is displayed. If water
flow is restored, the compressor
operation is automatically restored.
Waterside Economizer Flow Control
Units equipped with waterside
economizer control valves can be set
from the UCM for variable or constant
water flow using one of the following
options.
Modulating Standard Control for
Constant Water Flow - Two, two-way
modulating control shutoff valves are
wired, controlled and installed in the
unit. One valve is located in the
economizer’s water inlet, and the other
is located in the condenser bypass
water inlet. When the waterside
economizer is enabled, the two-way
valves modulate to maintain discharge
Water Flow Switch
83
Service Valves
Service valves are factory installed on
each circuit before and after the
compressor to allow isolation of the
compressor for servicing.
Heating Coils
Electric Heat
A single stage electric heating coil and
controls are factory installed inside the
unit casing at the fan discharge. An
open construction type coil is provided.
Power to the electric heater is factory
wired to the unit’s single-point power
connection.
Electric heat is available only on units
with the following system control
options:
• Programmable night heat morning
warmup
• Night heat morning warmup
Electric Heat Coil
Options
Hot Water
The hot water heating assembly
includes the coil and filter section and is
factory installed on the unit’s inlet.
A three-way diverting valve, actuator,
manifold piping and vacuum breaker
are also factory installed. The coil is a
Trane type WC and constructed of
5
/8-inch (16 mm) OD copper tubes and
arranged in a parallel pattern. The
copper tubes are expanded into
aluminum fins positioned continuously
across the entire coil width, not
exceeding 80 fins per foot. The coil
casing is 16-gauge steel. Coil
performance is rated at a maximum
working pressure of 200 psig in
accordance with ARI Standard 410.
Supply and return water header
connections are female tapered NPT
and can be accessed from the left side
of the unit.
Steam
The steam heating assembly includes
the coil and filter section and is factory
installed on the unit’s inlet. A two-way
diverting valve, actuator, manifold
piping and vacuum breaker are also
factory installed. The coil is a Trane type
NS and constructed of one inch (25 mm)
OD copper tubes and arranged in a
parallel pattern. The copper tubes are
expanded into aluminum fins positioned
continuously across the entire coil width,
not exceeding 42 fins per foot. The coil
casing is 16-gauge steel. Coil
performance is rated at a maximum
working pressure of 100 psig in
accordance with ARI Standard 410.
Supply and return steam header
connections are female tapered NPT
and can be accessed from the left side
of the unit. Factory provided controls
limit the leaving air temperature from
the heating coils to no more than
105 F (41 C) at all operating conditions.
Time Clock
A factory installed programmable time
clock is provided and wired to the
unoccupied mode binary input to
provide on/off control. The timer is
factory mounted and accessible without
opening the control panel door. The
timer is a seven-day type with a
maximum of four operations per day.
A permanent built-in rechargeable
battery pack is provided.
Time Clock
High Entering Air Temperature
Protection
A sensor is used to detect the unit’s
entering air temperature. This sensor is
located upstream from the optional
waterside economizer coil. If the unit’s
entering air temperature exceeds 135 F
(73 C), the unit shuts down and displays
a diagnostic. Manual reset is required.
Low Entering Air Temperature
Protection
A sensor with a reset element is factory
mounted on the unit’s entering airside. A
capillary tube is serpentine across the
coil face. If the temperature falls below
37 F (3 C), the fan shuts down and the
waterside economizer valve option will
open to allow full water flow. The heat
output, if applicable, is also energized.
Manual reset is required.
84
Non-fused Disconnect Switch
The unit non-fused disconnect switch
consists of a non-automatic circuit
breaker. It is mounted inside the control
panel and is operable without opening
any unit panels.
Flexible Horizontal Discharge
Low and Standard Height
Units are provided with a factory
installed horizontal discharge that
permits multi-directional duct
connections. The flexible horizontal
discharge is insulated with two inches
(51 mm) of 1.75 lb. (0.79 kg) density
fiberglass for sound attenuation.
Discharge openings can either be field
cut or factory cut (a two inch duct collar
is provided with factory cut holes). Low
height plenums are 24.625” on unit
sizes 20-38 and 21.125” on unit sizes 4280. Standard height plenums are
32.375” on unit sizes 20-38 and 29.25”
on unit sizes 42-80.
45-inch (1.143m) Height
Units are provided with a horizontal
discharge that permits multi-directional
duct connections. The flexible horizontal
discharge is insulated with
four inches (102 mm) of 1.75 lb.
(0.79 kg) density fiberglass for sound
attenuation. Discharge openings can
either be field cut or factory cut (a
two inch duct collar is provided with
factory cut holes).
Protective Coating
Cabinet
The unit exterior and exposed interior
surfaces have a four to six mil coat of
protective coating.
Options
Evaporator Coil
A three to five mil coat of protective
coating is applied to the coil using a
multiple dip-and-bake process.
Cupro-Nickel Condenser
One condenser is provided for each
compressor. The condensers are a
shell-and-tube design with removable
heads to allow tubes to be mechanically
cleaned. Tubes are ¾-inch (19mm) OD
and constructed of copper cupro-nickel
(90/10).
Dirty Filter Sensor
A factory installed pressure switch is
provided to sense the pressure
differential across the filters. When the
differential pressure exceeds 0.9-inches
(23 mm) WG, contact closure will occur.
A field installed indicator device may be
wired to relay terminals that indicate
when filter service is required. Contacts
are rated at 115 VAC which are
powered by a field supplied
transformer.
Stainless Steel Drain Pan
The drain pan is positively sloped,
fabricated from 304L stainless steel,
and insulated with ¾-inch (19 mm) of
1-lb. (0.5 kg) density fiberglass. The
drain pan contains a factory piped trap
with cleanout.
Dirty Filter Switch
85
Filters
Construction Throwaway
Two-inch flat face throwaway fiberglass
filters are installed in the filter section.
After construction and startup is
complete, replace these filters with
medium velocity throwaway filters.
Medium Efficiency
Two-inch (51 mm) medium efficiency
throwaway fiberglass filters are
installed in the unit filter section.
SCWD
Cabinet
The unit framework shall be formed
structural steel members of 14-gauge
galvanized steel. Exterior panels shall be
fabricated from 18-gauge galvanized
steel. The fan and compressor sections
shall be insulated with ¾-inch (19 mm)
of 1.75 lb./cu. ft (28 kg/cu. ft) density
fiberglass insulation.
The unit shall be provided with
removable panels to allow service
access to compressors, condensers, fan
motor, fan bearings, coils and valves.
Removable panels shall be secured with
quick-acting fasteners. The refrigerant
sight glasses shall be accessible during
operation. The control panel door shall
have lift-off hinges.
Compressors
Units shall have multiple compressors
with independent circuits for watercooled units and manifolded for
air-cooled units. Compressors shall be
manufactured by the unit manufacturer.
Scroll compressors shall be heavy duty
suction cooled type with suction screen,
centrifugal oil pump with dirt separator,
oil charging valve, and oil sight glass.
Protective devices for low pressure,
high pressure, and motor temperature
shall be provided. The compressors
shall be mounted on isolators for
vibration isolation.
Condenser (SCWD only)
One condenser shall be provided for
each compressor. The condensers shall
be shell-and-tube design with
removable heads and mechanically
cleanable tubes. Tubes shall be ¾-inch
(19 mm) OD and constructed of copper.
Condenser waterside working pressure
shall be 400 psig. All condenser water
piping, including cleanouts, shall be
factory installed to provide single
connections for water inlet and outlet.
Evaporator
The evaporator coil shall be seamless
copper tubes expanded into aluminum
fins. Tubes shall be ½-inch (13 mm) OD
with internally enhanced surfaces. Coil
shall have staggered tube arrangement
with intertwined circuiting and no more
than 12 fins per inch.
The drain pan shall be positively sloped
in all directions to assure proper
condensate removal. The drain pan
shall be fabricated of galvanized steel
and insulated with ¾-inch (19 mm) of 1lb. (0.5 kg) density fiberglass. Drain
piping, including a trap with cleanout,
shall be provided with a single-point
connection to the exterior of the unit.
Mechanical
Specifications
SCWD/SCRD
Refrigerant Circuit (SCWD only)
Refrigerant circuits shall be independent
and completely piped including filter
driers, sight glasses, distributors,
thermal expansion valves with
adjustable superheat and external
equalizer, and high pressure relief
valves with ½-inch (13 mm) flare
connection. Unit shall be provided with
adequate means of frost control. The
circuits shall be factory dehydrated,
charged with oil and refrigerant 22.
a switch to place the unit in auto remote,
auto local, or stop/reset mode; an
indicator display to show unit operating
status, diagnostics, and setpoints; and
adjustable setpoints for supply air
temperature, zone heating temperature,
supply air pressure, economizer
minimum position, supply air
temperature control band, and supply
air pressure control band. The threeposition switch and indicator display
shall be accessible without opening any
unit panels.
Refrigerant Circuit (SCRD only)
Two refrigerant circuits shall be piped to
the exterior of the unit. The refrigerant
piping includes filter driers, sight
glasses, distributors, thermal expansion
valves with adjustable superheat and
external equalizer. Unit shall be
provided with adequate means of frost
control. The circuits shall be factory
tested, dehydrated, and charged with
dry nitrogen.
Supply Fan
Supply fan shall be a single forward
curved medium pressure fan secured to
a solid steel shaft with grease lubricated
bearings designed for 200,000 hours.
Both fan bearings shall have
greaselines extended to a common
location. The drive components shall
include fixed pitch sheaves and multiple
V-belt sized for 150 percent of nominal
motor horsepower. The supply fan
motor shall have a service factor of
1.15. The supply fan motor shall be
(choose one)
A) Standard efficiency open drip-proof,
B) Totally enclosed fan cooled, C) high
efficiency open drip-proof. Supply fan
motor shall have a standard T-frame. All
drive components shall be accessible
without using scaffolds or ladders.
The entire fan assembly including drive
components shall be mounted on a
common base. The fan base shall be
isolated inside the unit. The entire
assembly shall be statically and
dynamically balanced at the factory.
Filters
Two-inch (51 mm) throwaway
fiberglass filters shall be provided for
installation during construction.
Unit Controls - DDC
Microprocessor controls shall be
provided to control all unit functions. The
control system shall be suitable to
control CV or VAV applications. The
controls shall be factory-installed and
mounted in the main control panel. All
factory-installed controls shall be fully
commissioned (run tested) at the
factory. The unit control panel shall have
86
The unit controls shall be used as a
stand-alone controller or as part of a
building management system involving
multiple units.
Units shall be provided with factory
mounted controls to operate as part of a
complete Integrated Comfort™ system.
This system will control the unit
operating mode; monitor unit status and
diagnostics; annunciate alarms; log unit
run time and starts; log timed overrides;
and produce weekly and monthly
reports for energy consumption, timed
overrides, and temperatures.
The self-contained unit shall have two
sets of field accessible terminals. One
set shall shut the unit down when the
connection between them is open. The
other set shall turn the fan on and
energize ventilation functions when the
connection between them is closed.
Generic BAS (Generic Relay Package)
Option
Unit shall be provided with the
necessary controls to interface with a
control system provided by others.
Terminals shall be provided for the
following inputs: fan on ventilate,
occupied/unoccupied, external interlock/
auto/stop, and external supply air
setpoint. In addition, terminals shall be
provided for the following outputs:
common alarm, customer supplied
heat, dirty filter, unoccupied mode,
ventilation air damper, VAV box relays,
and cooling tower interlock.
Unit Mounted Disconnect Switch
Option
The unit shall have a factory installed
disconnect switch that is accessible
without opening any unit panels.
Programmable Timer Option
The unit is provided with a factory
mounted seven-day programmable
timer to turn the unit on and off. The
timer shall have a built-in rechargeable
battery backup system. It shall be
accessible without opening any unit
panels.
Supply Air Temperature Reset Option
Reset of the supply air temperature
setpoint based on a remote space
temperature shall be provided. The
temperature at which reset begins and
the amount of reset shall be adjustable.
A temperature sensor shall be provided
for field installation.
Waterside Economizer Option
The waterside economizer option is
factory installed in the unit cabinet and
includes coil, valves, controls, and piping
with cleanouts. The economizer and
evaporator coils shall be separated to
permit cleaning the fins.
Mechanically Cleanable
The waterside economizer coil shall be
½-inch (13 mm) seamless copper tubes
expanded into aluminum fins. Coil shall
be either a 4-row, with no more than 12
fins per inch, or 2-row with no more
than 14 fins per inch. The tubes shall be
arranged staggered. Economizer coil
shall have removable cast iron headers
and mechanically cleanable tubes. The
waterside working pressure shall be
400 psig.
Chemically cleanable
The waterside economizer coil shall be
½-inch (13 mm) seamless copper tubes
expanded into aluminum fins. Coil shall
have 4-row staggered tube
arrangement with no more than 12 fins
per inch. Coil shall have copper headers
and be chemically cleanable. The
waterside working pressure shall be
400 psig.
Energy Saving Modulating Control
Valve
Unit shall be equipped with an energy
saving shutoff valve. Whenever cooling
is not required, water flow through the
unit shall be shut off.
Mechanical
Specifications
SCWD/SCRD
and CCRB
shipped separately for field installation.
An enthalpy sensor shall be provided
for field installation.
CCRB
The airside economizer shall be
controlled to maximize hours of free
cooling. When fresh air conditions are
not suitable, the fresh air damper shall
open to its minimum position. When
fresh air conditions are suitable, the
damper position shall be modulated in
response to supply air temperature. The
fresh air damper minimum position
shall be adjustable. During economizer
operation, the compressors shall be
enabled.
System Control Option
The unit shall be provided with factory
installed controls to interface with other
system components to perform
unoccupied night setback, morning
warmup, and occupied cooling. Contacts
shall be provided to interface with heat
controls, VAV boxes, cooling tower, and
ventilation equipment. All setpoints shall
be adjustable. Temperature sensors for
each heating setpoint and a switch to
override night setback for two hours
shall be provided for field installation.
(Choose one.)
A. Programmable Timer
A factory mounted seven-day timer
with a built-in rechargeable battery
backup system shall be included to
control the unit operating mode. The
timer shall be accessible without
opening any unit panels.
B. Morning Warmup
A set of terminals shall be provided to
control the unit operating mode. The
unoccupied mode shall be initiated
when the connection between them
closes. Morning warmup shall initiate
when the connection is open.
Compressors shall enable during
economizer operation. During
compressor operation, full water flow
shall be routed throughout the
economizer.
Cabinet
The unit framework shall be formed
structural steel members of 14-gauge
galvanized steel. Panels and access doors
shall be 18-gauge galvanized steel. The
unit exterior shall be phosphatized and
finished with air-dried enamel paint.
Refrigerant Circuits and Controls
All sizes shall have dual refrigerant
circuits and shall include an integral
subcooling circuit for each circuit. All
necessary controls to run unit fans shall
be factory installed. The control panel
shall include fan motor contactors,
terminal block connection for compressor
interlock, and 115-volt control power
transformer.
Condenser Coils
The condenser coil arrangement shall be
slab type. Coils shall be seamless
3
/8-inch (10mm) OD copper tubes
expanded into aluminum fins. Each circuit
shall include an integral subcooler. The
coil shall be leak tested at 450 psig air
pressure.
Condenser Fans and Motor
Vertical discharge direct drive fans shall
be statically and dynamically balanced at
the factory. Motors shall be three-phase
with permanently lubricated ball bearings,
built-in current and thermal overload
protection and weathertight rain slinger
over the fan’s shaft.
Protective Coating (Option)
Unit
The unit’s interior and exterior shall have
a 4 to 6 mil coat of protective coating
applied with an air-dry process.
Condenser Coils
The condenser coil shall have a 4 to 6 mil
coat of protective coating applied by a
multiple dip-and-bake process.
Low Ambient Operation (Option)
Standard ambient control allows
operation down to 45 F (-7.2 C) by cycling
the condenser fans. Low ambient control
damper shall allow the unit to operate
down to 0 F (-17.8 C) by utilizing additional
fan cycling and an external damper
assembly for head pressure control. The
low ambient control damper shall include
16-gauge damper assembly.
Airside Economizer Option
Mixing box with controls shall be
provided for use as an airside
economizer. The casing fabrication shall
be 16 gauge galvanized steel. The
exterior shall be painted beige with a
one mil coat of paint. Parallel blade
dampers shall be fabricated from 16
gauge galvanized steel and rotate on
rustproof nylon bushings.
Louvered Coil Guards (Option)
The unit coils shall be covered with a
factory installed decorative louvered grill
type panel for protection.
All controls, including linkages and
actuators, shall be factory installed and
adjusted. The economizer may be
87
Worldwide Applied Systems Group
The Trane Company
3600 Pammel Creek Road
La Crosse, WI 54601-7599
www.trane.com
An American Standard Company
Since The Trane Company has a policy of continuous
product improvement, it reserves the right to change
design and specification without notice.
Library
Product Literature
Product Section
Product
Model
Unitary
Vertical Self-Contained
000
Literature Type
Sequence
Date
Data Sales Catalog
6
December 1998
File No.
Supersedes
Ordering No.
PL-UN-PKG-000-DS-6-1198
PKG-DS-6-298
PKG-DS-6