MLC Air Cooled Chillers
MLC-FC Free Cooling Chillers
MLC-AD Adiabatic Chillers
60 - 500 Tons
n Mission
n Central
Critical Cooling
Plant Process Cooling
n Specialized
HVAC Cooling Systems
COOLING SOLUTIONS
www.motivaircorp.com
MLC & MLC-FC RANGE OF CHILLERS
RELIABILITY
CONTROL
The MLC chillers have been designed
Optimizing the performance of the MLC chillers is achieved
for ultimate reliability. Dual screw
through a customized PLC controller. Close control of the
compressors, independent refrigeration
supply water temperature and total control of the chiller
circuits, automatic lead/lag control,
operation allows the customer to receive the very best
state of the art PLC controllers with
performance from the chiller and the equipment being cooled.
multiple safeties and alarms, and
Eight total steps of unloading achieve optimal stability during
premium refrigeration components all
changing heat loads, while minimizing power costs. Compressor
combine to create a reliable chiller suited
lead/lag control can be customized by the operator, and insures
for the most demanding applications.
even wear on each refrigeration screw compressor. Condenser
fan speed control insures reliable operation during exposure to
EFFICIENCY & FLEXIBILITY
This new generation of MLC & MLC-FC
chillers utilizes the latest technologies to
produce the highest possible efficiency.
By integrating PLC algorithms,
variable frequency drives, R-134a
refrigerant and cutting edge production
techniques, Motivair is able to maximize
chiller performance with minimum
energy consumption.
Unlike many other manufacturers,
Motivair has the ability to modify and
adapt its standard range of chillers
to meet a customer’s unique needs.
Chillers can be designed for high or
low water and high or low ambient
temperatures. Chillers can be equipped
with an Integrated Free Cooling system,
low noise option, high elevation
package, pump and tank stations.
They can be adapted to integrate with
almost any Building Control System.
These options along with many other
custom additions allow Motivair
to create the best solution for any
customer’s cooling requirements.
low ambient temperatures. An optional Integrated Free-Cooling
System built into the chiller automatically switches the chiller
operation to maximize energy savings and increase chiller
component life when ambient temperatures drop below the
selected return water temperatures.
MLC & MLC-FC CHILLER FEATURES
REFRIGERATION
COMPRESSORS
CONDENSERS
All MLC chillers feature two heavy
copper tubes expanded into aluminum fins. The large face area,
duty, 3500-RPM semi hermetic screw
combined with the induced air flow from multiple fans results in 100%
The MLC air-cooled condensers are constructed from seamless
compressors
rated cooling capacity at 95°F ambient. Standard fan speed control
mounted in
permits reliable chiller operation in -20°F (glycol required). Remote
two completely
air-cooled condensers feature galvanized steel or aluminum housings,
independent
compartmentalized fans, weatherproof fan motors, fan cycling/fan
refrigeration
speed control, and independent fan motor overloads and contactors.
circuits. Each
compressor
CONDENSER FANS & MOTORS
features 4 steps of unloading for
Fans feature heavy-duty, cast aluminum blades, which do not flex or
virtually unlimited capacity control.
lose efficiency
One circuit can be serviced while the
at the top
second circuit remains fully operational.
of their
Positive lubrication, low oil level switch,
performance
motor over temperature protection and
curve. Motors
Liquid injection, all combine to provide
are TEAO;
extended compressor life.
suitable for
EVAPORATOR
The MLC & MLC-FC chillers feature
an ASME U stamped, dual circuited
evaporator mounted on the chiller base.
Carbon steel shell with heavy gauge
copper tubes insures long life and highly
efficient heat transfer under varying
loads. All MLC evaporators feature
CONDENSER
FAN/MOTOR
outdoor use,
and variable speed operation. These exceptionally reliable motors
feature reversed stator and rotor, which eliminates the traditional
motor shaft. The outer shell of the motor is the rotating body, to
which the rigid cast aluminum blades are cast or bolted. This unique
arrangement reduces torque stress on the blades, eliminates fan
blade stress fractures, maximizes airflow, and maintains efficiency
over the entire performance curve.
removable end bonnets and pressure
relief valves.
REFRIGERANTS
As a global supplier Motivair produces
REFRIGERANT COMPONENTS
the MLC & MLC-FC chillers with the
Each circuit includes an electronic
widest variety of environmentally
expansion valve, liquid receiver, filter
compatible refrigerants available in
dryer with replaceable core, sight
industry today. The current standard is
glass with color-change moisture
R-134A refrigerant which is the most
indicator, pump down service valves on
efficient refrigerant available. Other
compressor and receiver, high and low
options include R-407C and
side service access valves, HP and LP
R-404A which are
pressure safety switches, and glycerin
used based on
filled HP and LP gauges.
application
requirements.
MLC-RC 510
MLC-FC INTEGRATED “FREE-COOLING”
THE ULTIMATE SOLUTION FOR
OPTIMAL ENERGY SAVINGS
less mechanical refrigeration is required to achieve
The Motivair MLC-FC chillers with “Free-Cooling”
compressors are cycled off by the PLC, which
capability are designed to provide the owner with
continuously monitors the system.
the chilled glycol set point, and the refrigeration
optimal performance, year round, in varying ambient
temperatures. This “Free-Cooling” option, available
Energy savings in areas with cooler winter months
on models MLC-FC 200 – MLC-FC 1750 is supplied
are substantial. Wear and tear on chiller components
complete with “Free-Cooling” coil and the PCO3
is dramatically reduced, due to fewer running hours
advanced PLC control package – a unique single
during winter months. Automatic switching between
package for year-round energy savings.
mechanical cooling and “Free-Cooling” allows for
optimal performance year round. As a general rule of
The refrigeration plant is designed to cool the
thumb, “Free-Cooling” savings more than pay for the
designated heat load during the highest summer
initial investment in the first year of operation!
temperatures. When ambient temperatures fall
overnight or during cooler seasonal weather, the
The MLC-FC range has been designed, built and
integrated “Free-Cooling” system is automatically
tested specifically as packaged Free Cooling
activated. The system operates by directing the
Chillers. There are no aftermarket or 3rd party
return chilled glycol through the “Free-Cooling” coil,
add-on free cooling coils, components or controls.
before it enters the evaporator. This is achieved via
Motivair free cooling chillers are ETL tested and
an automatic motorized valve, controlled by the PLC,
listed. Motivair is the only manufacturer with a
cataloged and tested Free Cooling chiller range.
whenever the ambient falls below the return
Trust your mission critical process to the Free
chilled glycol temperature set point. The glycol
Cooling Chiller experts by specifying Motivair Free
is either partially or completely cooled in the “Free-
Cooling chillers.
Cooling” coil for maximum energy savings. As a result,
PLC CONTROLLER
COMPRESSOR
21.6
3-WAY VALVE
FANS
GLYCOL
IN
CONDENSER / FREE COOLING COIL
TEMP
SENSOR
EVAPORATOR
TEMP
SENSOR
PUMP
GLYCOL
OUT
EXP VALVE
TEMP
SENSOR
STORAGE TANK
ADIABATIC “EFFICIENCY BOOSTING” SYSTEM
AIR-COOLED
CHILLER SYSTEMS
gains, increased reliability during extreme summer weather and
reduced building energy demand loads.
The Motivair Adiabatic ”Efficiency
Boosting” System uses a proprietary
The evaporative media is specifically designed for ultra low pressure
evaporative “Pre-Cooling” media
drop with virtually no added static to condenser fans. As a factory
designed to pre-cool warm ambient
supplied option, media thickness and air flow velocities are designed
air before it reaches the air-cooled
to allow zero water carry over onto the chiller coils. The evaporative
chiller condenser coils. During warmer
media is easily removed for field service, cleaning or inexpensive
seasonal weather, the Adiabatic System
replacement. Virtually maintenance-free and requiring little or no
automatically activates and allows
water treatment the Adiabatic System is ideal for clients seeking
a small flow of city water to wet the
simple and reliable efficiency gains for their air-cooled chiller system.
evaporative
media. Warm,
FREE-COOLING CHILLER SYSTEMS
dry air first
Motivair Free Cooling chillers can be ordered with the adiabatic
passes through
option fitted. By automatically turning on the system when Free
the evaporative
Cooling is active and the ambient temperature is above freezing,
media where it
partial and 100% Free-Cooling operating hours can be significantly
is pre-cooled
increased. This allows the refrigeration compressors to be turned off
before it enters
for longer periods of time, in addition to the improved summer air
the condenser
cooled efficiency described above.
coils. Water that is not evaporated is
collected and recycled. Depending
The Adiabatic System is controlled & protected by the proprietary
on geographic location, inlet air
Motivair chiller PLC software and is completely automatic including
temperatures can be reduced by up to
auto fill, winter drain down, low water level and anti-freeze alarms.
20oF yielding significant chiller efficiency
MLC-FC 1200 with
Adiabatic System
MLC & MLC-FC CONTROLS
PLC CONTROLS
The MLC range features the PCO3 control system, which
is an advanced Programmable Logic Controller, with a
PC03 Board
base-operating platform that can be easily modified to adapt
to various applications. A multi-character LCD display, and
easy to follow directional prompts, gives the operator complete
control over all chiller functions. Multiple digital and analog
PC03 Display
inputs as well as digital and PWM outputs offer unparalleled
control possibilities. Control features of the PCO3 include:
n
Highly visible LCD display
n
Low water/glycol flow alarm
n
Tactile push-buttons
n
High water temperature alarm
n
Adjustable alarm set points
n
Low refrigeration pressure alarm
n
°F/°C selectable
n
High refrigeration pressure alarm
n
Compressor Lead/Lag control
n
Irregular voltage alarm
n
Anti-Compressor short cycle
n
General Alarm Relay
n
Compressor failure alarm
n
Remote Start/Stop Relay
n
Adjustable water set point
n
Manual alarm reset
n
Supply water temp. display
n
RS 232/RS 485 communication
n
Return water temp. display
n
Ethernet Communication
n
Low water temperature alarm
n L
ON,
n
Freeze alarm
BACNET, MODBUS
communication (optional)
INTELLIGENT CHILLER RESPONSE
The Latest generation of Motivair software allows the
chillers to respond to system changes in real time and to
adjust performance accordingly. The proprietary control
logic in the MLC & MLC-FC chillers provides:
n
Automatic restart after a power outage
n R
apid
restart of refrigeration compressors after a power
outage, while affording maximum compressor protection
n S
elective
decision on which compressor(s) to start first
based on run-time and fastest possible response to
system load
n L
iquid
injection to the compressors under high ambient
operation
n S
eamless
transition between refrigeration and optional
Free Cooling mode based on system load, chilled water
temperature, ambient temperatures and installation
profile.
MLC & MLC-FC SPECIFICATIONS
MLC & MLC-FC CHILLER RANGE MLC
200270340390 510600 660 820 930 110011501200140016001750
WITH SCREW COMPRESSORS
NOMINAL COOLING CAPACITY
Tons
58 72 84110127176200233 260 299 328 350 400 466520
EWT 54°F LWT 44°F AMB 95°F
o
MLC-FC 100% FREE COOLING AMBIENT TEMP.
F32.030.329.127.0 25.526.8 25.0 24.1 25.2 20.5 21.1 21.2 25.0 24.1 25.2 REFRIGERATING CIRCUIT Qty.
2
2
2
2
2
2
2
2
2
2
2
2
4
4
4
SCREW COMPRESSOR
Qty.
2222 22 2 2 2 2 2 2 4 4 4
CAPACITY STEPS (PER COMPRESSOR)
Qty.
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
FANS / CONDENSER
MLC ELECTRONIC FAN SPEED CONTROL
Qty.
2
2
2
2
2
2
2
2
2
2
2
2
4
4
4
MLC TOTAL CONDENSER AIR FLOW
CFM 40,10040,70050,80058,300 89,50097,700141,300134,300150,700181,300 200,100 217,800 282,600268,600301,400
MLC FANS
Qty.
4
4
6
6
10
10
14
14
16
18
20
22
28
28
32
MLC FANS TOTAL NOMINAL POWER
HP
9
9
13
13
22
22
31
31
35
40
44
48
62
62
70
MLC-FC ELECTRONIC FAN SPEED CONTROL
Qty.
2
2
2
2
2
2
2
2
2
2
2
2
4
4
4
MLC-FC TOTAL CONDENSER AIR FLOW
CFM 68,864 68,040 67,686 89,464 88,051 131,841 156,562 155,738 178,928 198,115 239,551 235,667 313,124 311,476 357,856
MLC-FC FANS
Qty.
6
6
6
8
8
12
14
14
16
18
22
22
28
28
32
MLC-FC FANS TOTAL ABSORBED POWER
HP
18
18
18
24
24
36
42
42
48
54
66
66
84
84
96
OPTIONAL PUMP & TANK
NOMINAL FLOW
GPM
139172200263 301419 477 553 619 708 781 833 9541,106
1,238
OPTIONAL PUMP PRESSURE
PSI 39.2
43.5
30.5
33.4
33.4
35.5
36.3
43.5
40.6
45
37.7
46.4
NA
NA
NA
OPTIONAL PUMP ABSORBED POWER
HP
7.5
10
10
15
15
25
25
30
30
40
50
60
NA
NA
NA
OPTIONAL PUMP ABSORBED CURRENT
A
11
14
14
21
21
34
34
40
40
52
65
77
NA
NA
NA
FLANGED CHILLED WATER CONNECTIONS
IN
4"
4"
4"
5"
5"
6"
6"
6"
8"
8"
8"
8"
8"
8"
8"
OPTIONAL TANK VOLUME
gallons 132
132
132
132
132
132
176
176
N/A
N/A
N/A
N/A
NA
NA
NA
ELECTRICAL DATA
POWER CIRCUIT
V/Ph/Hz
460/3/60 (575/3/60 Optional)
AUXILIARY CIRCUIT
V/Ph/Hz (230-24)/1/60 MLC FULL LOAD AMPS (FLA)*
A
103
132
149
188
236
305
349
419
453
549
602
627
698
838
906
MLC MINIMUM CIRCUIT AMPACITY (MCA)*
A
114
147
166
209
262
339
387
466
504
612
671
698
735
884
955
MLC MAXIMUM OVERCURRENT PROTECTION (MOP)*
A160208232294 365477 542 655 707 860 943 979 8831,067
1,151
MLC-FC FULL LOAD AMPS (FLA)*
A
112
136
155
206
237
320
360
427
468
539
597
636
698
838
906
MLC-FC MINIMUM CIRCUIT AMPACITY (MCA)*
A
123
150
171
228
263
354
398
474
519
597
661
705
735
884
955
MLC-FC MAX. OVERCURRENT PROTECTION (MOP)*
A167207236316 366359 551 660 723 832 917 981 8831,067
1,151
NOISE DATA
MLC SOUND PRESSURE LEVEL**
dbA 61
63.2
63.3
64.6
64.9
67.8
69.1
70.5
71.1
71.4
72.1
72.1
74
74.6
77
MLC-FC SOUND PRESSIRE LEVEL**
dbA
60.362.863.563.9 64.267.2 68.2 70 70.5 70.8 71.1 71.4 74 74.6 77
DIMENSIONS AND WEIGHTS
MLC Length
IN
118118157157 197197 260 260 295 354 394 394 544 544 614
MLC Width
IN
118118157157 197197 260 260 295 354 394 394 544 544 614
MLC Height
IN
96969696 9696 96 96 96 96 96 96 96 96 96
MLC-FC Length
IN
157157157195 195270 307 307 344 382 457 457 544 544 614
MLC-FC Width
IN
87878787 8787 87 87 87 87 87 87 87 87 87
MLC-FC Height
IN
87878787 8787 87 87 87 87 87 87 87 87 87
MLC Weight - Installed*
LBS 7,880 8,460 9,510 10,060 11,320 12,570 14,400 15,190 16,230 17,510
20,200
20,650
30,300 31,880 33,960
MLC-FC Weight Installed*
LBS 8,067 9,282 9,835 12,045 12,376 16,023 16,907 17,680 21,216 23,205
26,520
27,625
35,314 36,860 36,860
* Does not include optional pump or tank
** Distance measured in an open field at 33 feet from condenser
MLC CAPACITY CORRECTION CHART
Capacity Correction Factors (cf)
Chilled Water Temp. (°F)
(Multiply catalog capacities by correction factors)
23
32
40
45
50
55
60
0.63
0.77
0.93
1
1.1
1.2
1.3
85
90
95
100
1.06
1.03
1
Glycol % (by weight)
0
10
20
30
40
50
Consult
cf4 1
0.99
0.98
0.97
0.96
0.94
Motivair
cf1 °F
Ambient Temp. (°F)
cf2 °F (MLC)
Consult Motivair
0.96
©2012 Motivair Corporation. Motivair reserves the right to modify specifications without notice. Reproduction of this brochure in whole or part is prohibited.
APPLICATION, INTEGRATION
& SOLUTIONS FOR ALL YOUR
COOLING NEEDS:
MPC & MPC-FC
1/2-50 ton packaged air-cooled or water-cooled
chillers for Industrial cooling, Medical cooling or
custom HVAC applications. Includes integrated
microprocessor, pump station, and storage reservoir.
MHR & MHP
15-500 ton air-cooled or water cooled chillers with
Simultaneous Heat Recovery or Heat Pump option.
MHP
Reversible air-to-water heat pump chillers from
15-240 tons. Available with primary circulation pumps,
low noise package and simultaneous heat recovery.
MCD Chilled Door ®
Advanced rack cooling system fits any standard
or OEM computer rack. Removes up to 45 kW
of heat per door. Enhanced performance with Free
Cooling chillers.
PTS
Pump/Tank Stations for chillers
and cooling systems.
MOT & MEC
Open draft or closed loop evaporative cooling
towers for process cooling or HVAC applications.
MFC
Closed loop dry-coolers for process cooling
and remote “Free-Cooling” applications.
Printed on Recycled Stock with 10% Post Consumer Fiber.
0090102
85 Woodridge Drive
Amherst, NY 14228
Tel: 716-691-9222
Fax: 716-691-9229
www.motivaircorp.com