01/29/16
4
DESIGN NO. _____
SECTION 15974
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH SPACE WIRELESS
PNEUMATIC THERMOSTATS (WPT)
PART 1 - GENERAL
1.01
DESCRIPTION OF WORK
A.
7
For existing buildings, provide all labor, materials,
equipment and services required to modify, overhaul,
repair and replace defective components of the existing
terminal [and central] equipment pneumatic temperature
control
system,
to
conform
to
the
Drawings,
Specifications
and
requirements
of
the
heating,
ventilating and air-conditioning systems serving the
building. Product specific requirements are contained
herein; Section 15501, General Provisions for Heating,
Ventilating and Air Conditioning Work, shall be
referred to for general requirements.
B.
All existing control equipment and pneumatic piping
which
are re-used shall be completely checked,
overhauled, put into first class condition.
C.
The control system shall be complete, including all
necessary terminal unit wireless pneumatic thermostats,
central unit standard pneumatic [digital] controllers,
repeaters, USB hubs, central data storage gateway with
user interface, relays, switches, controllers, control
valves and actuators, dampers, damper actuators, air
compressors, moisture eliminators, piping, wiring and
all accessories necessary to perform the intended
sequence of operations as specified.
10
5
1.02
RELATED SECTIONS
1.03
A.
Division 9 Sections
B.
Division 15 Sections
C.
Division 16 Sections
SUPPLEMENTAL SUBMITTALS
A.
5
B.
NYCSCA
Product
Data:
Submit
installation
and
start-up
instructions for all controls, instruments, gauges,
dampers, damper actuators, compressed air station and
accessories. The submission of individual items or
portions
of
equipment
will
not
be
acted
on
individually.
Air Compressor: Submit capacity and horsepower rating
calculations to serve control air for all devices plus
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 1
01/29/16
DESIGN NO. _____
an allowance for
system capacity.
1.
C.
10
future
expansion
of
the
full
Receiver tank sizing shall be submitted for review
with compressor capacity calculations.
Shop Drawings
1.
Submit wiring and piping diagrams; schematic flow
diagrams showing fans, pumps, coils, dampers,
valves, and other control devices; and dimensions
for approval prior to beginning any installation.
These schematic diagrams, piping diagrams and
wiring diagrams must be submitted and approved
prior to submission of motor starters and the
automatic temperature controls.
Differentiate
between manufacturer-installed and field-installed
piping and wiring.
2.
Shop drawings shall indicate temperature set
points and throttling ranges of all controllers,
pneumatic port and electric contact sequencing of
all relays.
Label each device with setting or
adjustable range of control.
3.
Control
Valve:
Submit
certified
valve
characteristics with the shop drawing submission.
4.
Submit shop cuts for terminal unit wireless
pneumatic thermostats and central unit standard
pneumatic thermostats, repeaters, USB hubs and
central data storage gateway. Submit the location
of all of the devices for approval.
D.
Submit schedule of control damper actuators indicating
size, arrangement, and number and size of operators
required. Submit schedule of control valves indicating
system in which the device is to be used, rated
capacity, flow coefficient, flow required by device
served, actual pressure drop at design flow, size of
operator required, and locations where valves are to be
installed. Submit schedule for terminal unit wireless
pneumatic
thermostats,
central
air
handling
unit
standard pneumatic thermostats, central air handling
unit direct digital controls, repeaters, USB hubs and
central data storage gateway.
E.
Maintenance Data
5
10
1.
NYCSCA
20%
Maintenance Manuals
F.
Field test reports as specified
G.
Manufacturer’s guarantees
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 2
01/29/16
DESIGN NO. _____
H.
Maintenance Materials for thermostat cover: Special
keys or wrenches required for cover removal shall be
furnished to the Authority.
I.
Contractor’s start-up and demonstration affidavit
J.
Contractor’s backbone field tests and wireless site
survey results
1.04
SUPPLEMENTAL QUALITY ASSURANCE
A.
1.05
1.
Provide electrical components of temperature
control systems (compressor starters, refrigerated
dryers, etc.) that have been UL-listed and
labeled.
2.
NEMA Compliance: Comply with NEMA standards
pertaining
to
components
and
devices
for
temperature control systems.
3.
All appliances regulated by the New York City
Construction Codes shall be listed and labeled
(reference MC 301.4, MC 301.6).
Testing of
material and equipment shall be in accordance with
28-113 of the Administrative Code (reference MC
301.5). Whenever the NYC Construction Codes or the
Rules of the Department of Buildings requires that
material be listed or labeled and material
proposed to be used is not so listed or labeled,
the use of such material shall be subject to prior
approval by the Commissioner (Office of Technical
Certification and Research OTCR) and such material
shall be used only to the extent set forth in such
approval. Materials that were previously approved
by the Board of Standards and Appeal (BSA) or by
the Department (MEA) before the effective date of
the NYC Construction Codes may continue to be
used, but only to the extent set forth in such
approval, and only if such approval is not
specifically
amended
or
repealed
by
the
Commissioner.
SUPPLEMENTAL GUARANTEE
A.
NYCSCA
Codes and Standards:
Provide a written two-year guarantee signed by the
manufacturer. The starting date shall be the date of
Substantial Completion.
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 3
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DESIGN NO. _____
PART 2 - PRODUCTS
2.01
MANUFACTURES
A.
Approved Manufacturers:
Honeywell Inc.
Johnson Controls Inc.
Landis & Staefa/Siemens Building Technologies, Inc.
Invensys (Siebe, Barber-Colman, Robertshaw)
TSBA Controls, Inc.
Cypress Envirosystems
Millennial Net
2.02
MATERIALS - GENERAL
A.
7
2.03
NYCSCA
Provide
complete
and
in
satisfactory
operating
condition, 2 pipe terminal [and central] equipment
temperature control systems shown on the Drawings and
specified herein.
AIR COMPRESSORS
A.
Provide in the location shown on the Drawings a duplex
type air compressor set complete with air tank,
motors, V-belt drives, pressure switches, ASME safety
relief valve, pressure gauge, intake filter silencers,
starters, electric alternator, air gauges, and all
other items and accessories.
The two compressors
shall be mounted on ASME National Board receiving
tank.
The entire unit shall be factory piped and
wired.
B.
Each air compressor shall be suitable for 80 psi
operating pressure of sufficient size and capacity so
that either compressor shall be able to provide the
required air to the control system when operating less
than one-third of the time. Each compressor shall be
single or double stage, one or two cylinders, air
cooled, with cast or ductile iron crankshaft supported
on both ends by means of ball, roller or sleeve main
bearings. Compressor crankcase, cylinders and flywheel
shall
be
of
heavy
cast
iron
construction.
Lubrication shall be of the constant level splash
type, or of the pressure type, to assure adequate
supply of oil to all working parts. Compressor shall
be provided with lap joint piston rings to limit oil
carryover to 4 PPM maximum.
C.
Capacity of each compressor, size, speed and current
characteristics of motor, together with the size of
the air tank shall be as shown on the Drawings. Each
compressor motor shall be drip-proof and shall conform
to the requirements of Section 16480: Motors and
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 4
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DESIGN NO. _____
Control Equipment. Motor base shall be provided with
grooves for belt tightening purposes.
V-belt drive
shall be provided in accordance with manufacturer's
standard practice.
Provide OSHA totally enclosed
heavy gauge steel belt guard.
2.04
D.
Each compressor motor shall be provided with a magnetic
starter
with
disconnect,
three
thermal
overload
relays, and pressure switches.
Provide an electric
alternator to alternate automatically the starting
sequence of the compressor motors.
Electric controls
shall be factory installed and wired in an enclosed
steel cabinet mounted on the unit. A complete wiring
diagram shall be secured to the interior of the
cabinet door.
E.
Compressor unit shall be painted with a prime and
finish
coat
of
paint
in
accordance
with
the
manufacturer's standard practice.
Air tank shall be
provided with a drain opening at the bottom, which
shall be piped near the floor with a gate valve and
discharge into a floor drain.
F.
Provide service wiring to the air compressor control
cabinet.
G.
Air compressors shall be manufactured by Gardner-Denver
Company,
Curtis
Toledo
Inc,
Quincy
Compressors,
Division of Colt Industries or Johnson Controls Inc.
by Powerex.
MAIN RECEIVER TANK
A.
1
2.05
REFRIGERATED AIR DRYERS
A.
NYCSCA
ASME 200 psig rated welded steel tank, hot dip
galvanized type, furnished with structural framing and
vibration isolation.
Provide seismic restraints.
Tank connections include valve drain outlet and
condensate trap to spill over floor drain and pressure
relief valve connection on tank.
Provide in parallel two (2) refrigerated air dryers
for the compressed air system.
Each unit shall
consist of a hermetically sealed, direct connected
refrigerant compressor and motor unit, automatic drain
valve, non-toxic refrigerant, automatic expansion
valve, condenser, lubrication system, insulation, and
other items and accessories, contained in a wall
mounted cabinet.
The air dryers shall be connected
into the high pressure side of the compressed air line
with copper tubing between the air tank and the
pressure reducing station.
Each unit shall be noncycling type, with sufficient capacity to provide the
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
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DESIGN NO. _____
entire amount of dry air (based on 95o F ambient
temperature) required for normal temperature control
system operation.
2.06
B.
Secure sign to wall adjacent to dryer receptacle that
states, "AIR DRYERS SHALL RUN CONTINUOUSLY.
DO NOT
DISCONNECT." Sign shall be fabricated from two color
laminated
phenolic
stock,
1/16"
thick,
machine
engraved to expose the inner core color.
Letters
shall be 1" high and shall be white on black
background.
Sign shall be provided with uniform
margins. Laminated phenolic sign shall be mounted on
plastic back plate and secured with tamperproof screws
and expansion sleeves.
C.
Refrigerated Air Dryers shall be manufactured by
Champion,
A
Gardner
Denver
Company,
Hankison
International, Div. of Hansen, Parker Hannifin Corp.,
Curtis Toledo Inc., and Quincy Compressors.
AIR FILTERS
A.
2.07
2
NYCSCA
Provide two (2) prefilters and two (2) afterfilters,
each sized for the capacity one compressor.
Filters
shall
render
dirt-free
system
performance
and
cleanable type.
Provide isolation piping valves to
permit interruptible service during maintenance.
FILTERING AND PRESSURE REDUCING EQUIPMENT
A.
Provide a compressed air pressure reducing station
complete with oil filter, reducing valves, safety
valves, isolating valves, gauges, brass piping and
fittings. The use of type K copper tubing with brass
or copper solder joint fittings is also acceptable for
assembling this station.
The reducing station shall
be wall mounted adjacent to the air compressor.
Equipment and piping shall be arranged to provide
identical parallel paths for the compressed air to be
discharged to the temperature control system at the
reduced pressure required for the mode of operation.
B.
Oil Filter: Provide a replaceable media cartridge type
oil filter in the air piping between the refrigerated
dryer and the pressure reducing station. Filter shall
be so designed that the media can be replaced without
removing the entire unit from the piping.
A drain,
with valve or petcock, shall be provided at the bottom
of the filter assembly.
C.
Pressure Reducing Valve: Provide a two (2) parallel
branch pressure reducing station to reduce highpressure air to pressure required by all the control
instruments. Each branch shall have a minimum of two
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 6
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DESIGN NO. _____
(2) pressure reducing valves. Each branch shall have a
maximum of three pressure reducing valves. These
valves shall reduce the air pressure in stages from 80
psi to 30 psi, 30 psi to 19 psi and finally 19 psi to
15 psi.
2.08
NYCSCA
D.
Air Gauges: Provide a 2½" diameter air gauge before and
after each pressure reducing valve. Gauge before the
primary
reducing
valves
shall
have
0-100
lbs
graduation.
Movement for gauge shall be stainless
steel gear mounted on socket independent of case.
Case and ring shall be steel with black baked enamel
finish. Gauges shall be mounted on the air piping.
E.
Safety Valves: Provide an approved make ASME standard
bronze safety valve at the air tank and after each
pressure reducing valve. The safety valve at the air
tank shall be 3/4", set at 85 psi and each safety
valve after each reducing valve shall be set at
approximately 5 psi higher than the setting of the
reducing valve it follows.
Safety valves shall be
Crosby Valve & Gauge Co., Kunkle Valve Co. or J.E.
Lonergan Co.
CONTROL VALVES
A.
All automatic control valves shall be of the plug,
straight through, three way or diverting type, fully
proportioning.
Convector/radiator valves shall be
specified fail safe "open" during a loss of control
air pressure, i.e. normally open.
Chilled water
cooling coil valves shall be normally closed.
B.
All valves 2" and smaller: 125 PSIG bronze bodies with
screwed connections; 2½"and larger 125 PSIG cast iron
bodies with flanged connections.
C.
Pneumatically operated valves 2½" and larger used in
sequence operations shall be equipped with positive
positioning devices.
D.
Steam control valves shall be 2" or smaller and shall
be selected on their inlet pressure, typically to match
boiler output and their pressure drop. Where a larger
capacity is required, provide two valves in parallel,
(1/3 capacity, 2/3 capacity) arranged to operate in
sequence.
E.
Pneumatic steam valves shall be diaphragm operated and
of pattern and design to suit the space in which they
are located. Diaphragm shall be molded of neoprene or
other oil resistant synthetic rubber and of ample size
to keep the valve shut tight against 10 psi steam
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 7
01/29/16
DESIGN NO. _____
pressure with 15" of vacuum in the system and with 10
psi air pressure on the diaphragm. Tops, spiders, and
all other items and accessories of the valves shall be
metal, of substantial design, and able to withstand
the strains incidental to the duty.
Each pneumatic
valve shall be provided with a throttling nut or
similar device for regulating the flow of steam.
Pneumatic steam valves shall be adjusted so that the
valves will tightly close at the temperatures for
which the thermostats are set.
NYCSCA
F.
Pneumatic water valves shall be diaphragm operated and
of pattern and design to suit the space in which they
are located. Diaphragm shall be molded of neoprene or
other oil resistant synthetic rubber and of ample size
to keep the valve shut water tight against 30 psi in
the system, with 10 psi air pressure on the diaphragm.
Tops, spiders, and all other items and accessories of
the valves shall be metal, of substantial design, and
able to withstand the strains incidental to the duty.
Each pneumatic valve shall be provided with a
throttling nut or similar device for regulating the
flow of water.
Pneumatic water valves shall be
adjusted so that the valves will tightly close at the
temperatures for which the thermostats are set.
G.
Pneumatic control valves in all intermediate and high
school occupied areas shall be equipped with slotted
metal guard, wire guard, or perforated guard designed
for heavy use, that shall be fastened in place and
completely enclose the control valve. Guard shall be
Model TVG-12A, as manufactured by Shaw-Perkins Inc. or
the approved equal by Brooklyn Guard and Central
Mechanical. Primary school pneumatic control valves in
school
playroom,
cafeteria,
corridor,
gymnasium,
locker room or shop shall also be equipped with guards
as defined above.
1.
Guard Materials: The guard shall be factory or
shop fabricated - Field welding shall not be
permitted.
Construction: 14 gauge die-formed
solid steel end caps and 16 gauge steel housing of
fully perforated steel with holes on centers that
shall not interfere with operation of the device.
All
pipe
entry
openings
shall
have
edges
reinforced with a 16 gauge minimum edging.
Absolute 1" minimum clearance shall be maintained
between enclosing valve and the floor.
2.
Provide
a
locking
access
door
to
prevent
unauthorized adjustment and vandalism of the
control tubing. All locks to be keyed alike and
two sets of keys shall be given to the Authority.
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 8
01/29/16
DESIGN NO. _____
3.
5
2.09
2.10
H.
Chilled water control valves shall be sized for a
maximum pressure drop of 5 PSI at maximum rated flow
through the coil.
I.
For systems with water-cooled refrigeration, size the
condenser water by-pass valve for 100% of the system
flow and full size of the condenser water flow main.
Butterfly valves are acceptable for this application.
CONTROL DAMPER OPERATORS
A.
Provide all automatic damper operators shown on the
Drawings and as indicated on the flow diagrams. Size
and service as scheduled/shown on the Drawings.
B.
Pneumatic damper operators shall be of the piston type,
diaphragm operated with spring return.
Operators
shall have ample power to perform the duties to which
assigned.
They shall be secured to the damper frame
or to adjacent rigid surface for support to insure
proper operation.
Air piping connection to a damper
operator shall be made only with looped copper tubing.
C.
All pneumatically operated damper motors for dampers 12
square feet or larger shall be equipped with positive
positioning devices.
D.
Provide hinged access doors at all dampers for
inspection of duct interior of not less than 24" x 18".
E.
Dampers used in the inlet to roof type exhaust fans
shall be provided by the fan manufacturers as specified
in the Power Roof Ventilator section.
F.
Openings in walls for outside air intakes, together
with stationary louvers and screens, shall be as
specified in Section 10214: Stationary Metal Wall
Louvers, unless otherwise indicated.
G.
Boiler Room outside air dampers shall be automatically
operated by means of electric damper motors as
specified in the steam and hot water fuel burning
sections with the damper actuators as specified in
Section 15915.
THERMOSTATS, CONTROLLERS, TRANSMITTERS
A.
General
1.
NYCSCA
Guard shall mount directly to the pipe or floor
and shall enclose the valve.
Provide room wireless pneumatic thermostat (WPT)
in
each
location
shown
on
the
Drawings.
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 9
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DESIGN NO. _____
Thermostats shall be wireless pneumatic of the
proportional action type for two pipe operation.
Wireless room thermostats shall operate the
pneumatic steam convector valves and pneumatic
Variable Air Volume (VAV) terminal units to
maintain design temperatures. Setting adjustment
shall be of the tamper-proof design.
Provide
relay where one room thermostat controls five or
more pneumatic valves and/or pneumatic operators
(in the same room).
2.
All
controllers
shall
proportioning type with
range.
3.
Pneumatic
transmission
shall
be
utilized
exclusively
for
transmission
of
temperature
signals.
4.
Pneumatic transmitters shall have a range span
matched to the variable to be transmitted.
All
transmitters shall be calibrated to a single test
gauge of industrial quality.
5.
Wireless Pneumatic Thermostat (WPT) shall be able
to be used in a direct or reverse acting
application and shall offer dead band control.
6.
WPT shall be able to function properly with a
maximum supply pressure operating pressure of 25
psi.
7.
The maximum airflow usage shall be 0.011scfm.
8.
The operating wireless frequency shall be 2.4 GHz
ISM band.
9.
The WPT shall be powered by lithium batteries with
two years or more battery life.
10.
Fail safe mode shall be such that WPT shall hold
the occupied temperature in event of a wireless
failure (not battery or electronic failure).
11.
WPTs shall be able to operate at 32ºF to 122ºF,
95% RH conditions.
12.
The WPT shall
pressure.
detect
and
be
of
the
fully
adjustable throttling
display
branch
line
13. The WPT shall have programmable schedules with the
ability to operate on multiple occupied and
unoccupied setpoints and provide setback control.
NYCSCA
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 10
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14. The WPT shall monitor space
provide monitoring and control
unoccupied setpoints.
temperature
of occupied
and
and
15. The WPT shall provide indication of low battery
life
and
shall
communicate
this
information
wirelessly to the gateway.
16. The WPT shall be able to provide occupancy
override including event notification and logging.
17. WPT shall be able to provide remote monitoring and
HVAC control capabilities through a wireless bidirectional hybrid mesh network.
18. Nominal wireless ranges to a single hop shall be
300 feet in open halls, 150 feet in open office
floor and 100 feet in corridors. WPT wireless
range shall be nominally 100 feet through five
drywalls, 60 feet through three brick walls and 25
feet through single ceiling.
Contractor to
perform wireless site survey as indicated in
paragraph 3.03.E.
19. WPT shall have Liquid Crystal Display which
displays room temperature, branch line pressure,
setpoint, occupied/unoccupied mode, battery level
and wireless connection status. WPT shall provide
setpoint adjustment.
B.
NYCSCA
Wireless Thermostat Mountings
1.
Each room wireless thermostat shall be installed
with its center approximately 7'-0" above the
floor for High Schools and Intermediate Schools
and 5’-6” above the floor for Primary Schools
unless shown otherwise on the Drawings.
2.
All wireless thermostats shall be mounted on
interior columns or interior walls of each
respective controlled space. Wireless thermostats
located on walls near electrical switches shall be
centered over the switch plate. Review locations
of all wireless thermostats with the Architect and
with the Authority.
C.
Wireless Thermostat Covers: Covers for thermostats
shall be tamper proof plastic.
Each cover shall be
suitably secured to the wall to prevent tampering.
D.
Wireless Thermostat Guards: Each thermostat installed
in a primary school playroom, cafeteria, corridor,
gymnasium, locker room or shop shall be provided with
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
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DESIGN NO. _____
a clear acrylic resin plastic guard which shall be
fastened in place.
Thermostats in all occupied areas
in intermediate and high schools shall be equipped
with clear acrylic resin plastic guard which shall be
fastened in place. Guard shall mount directly to wall
and enclose thermostat.
Guard shall have key lock
with inner shelf to prevent tampering. Guard shall be
provided with vents to provide ample circulation.
Guard shall not compromise thermostat settings and
shall not degrade the wireless operation. Guard shall
be manufactured by Honeywell or approved equal.
2.11
DUCT THERMOSTATS
7
A.
Duct thermostats for air handling units shall utilize
DDC, direct digital controls: Refer to Section 15971.
A.
Duct thermostats for air handling units shall utilize
standard pneumatic controls: Provide in the ductwork,
where shown on the Drawings or where specified, remote
bulb insertion type standard proportioning thermostats
to control the air heating and/or cooling coil
pneumatic
valves
and,
where
so
indicated,
the
automatic air operated dampers.
2.12 LOW-TEMPERATURE PROTECTION THERMOSTATS (FREEZESTAT)
A.
Provide low-temperature protection thermostats of
manual-reset type with sensing elements 20'-0" in
length.
Provide thermostat designed to operate in
response to coldest 1'-0" length of sensing element,
regardless of temperature at other parts of element.
Support element properly to cover entire duct width.
Provide separate thermostats for each 25 sq. ft. of
coil face area or fraction thereof.
The thermostat
shall prevent the supply fan of that system from
operating whenever the temperature of the air leaving
the coil falls below the setpoint.
Provide wiring
between the thermostat and the fan control. This
thermostat shall be of the manual reset type to allow
the fan to start.
2.13 OUTDOOR SENSOR
A.
Outdoor sensors for air handling units that utilize
DDC, direct digital controls: Refer to Section 15971.
Provide as shown on the Control Detail Drawings.
A.
Outdoor sensors for air handling units that utilize
pneumatic controls: The outdoor sensors shall be wired
to the control panel assembly and shall consist of a
capacitive sensor assembly with two 100 ohm platinum
RTD, solid-state 2-wire, 4-20 mA transmitter mounted in
a housing suitable for outdoor installation.
The
7
NYCSCA
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
SPACE WIRELESS PNEUMATIC THERMOSTATS (WPT) 15974 - 12
01/29/16
DESIGN NO. _____
sensing elements shall be installed in a weatherproof
enclosure.
Provide required supply power from the
nearest local panel. The transmitters shall be matched
to the respective sensing element. The assembly shall
be factory calibrated to + 1oF dry bulb over the entire
operating span.
2.14
7
2.15
DUCT THERMOMETERS
A.
WALL THERMOMETERS
A.
2.16
For pneumatically controlled air handling units,
provide a duct thermometer adjacent to each duct
thermostat.
Thermometer shall be vapor, bi-metal or
liquid actuated dial or column type. Each thermometer
shall have a scale graduated 30oF to 180ºF, and shall
have a stem or bulb, not less than 8" long. Dial type
shall be not less than 3½" in diameter and shall have
a metal case and non-ferrous or stainless steel bezel.
Column type shall have a non-ferrous metal case of 9"
minimum length.
Thermometers shall be adjustable
type, so as to be easily readable when installed, from
floor level.
Provide thermometer next to each thermostat in each
location indicated on the Drawings.
Each thermometer
shall have a scale at least 7" long which shall have a
range of approximately 20oF to 100oF.
Thermometer
shall have red reading fluid. Reading tube and scale
shall be mounted on a finished wood back piece that
shall have a screw hole near the top and near the
bottom.
Thermometers shall be mounted to the wall
with brass oval head screws.
CONTROL PANEL
A.
Control panels for air handling units that utilize DDC,
direct digital controls: Refer to Section 15971.
Provide as shown on the Control Detail Drawings.
A.
Control panels for air handling units that utilize
pneumatic controls: Provide a local steel or aluminum
panel for each control system.
Panels shall be
unitized construction and securely mounted where shown
on the Drawings or directed by the Authority near its
respective controlled apparatus in the mechanical
equipment room. Submit sample of construction for
approval with the shop drawings.
7
1.
NYCSCA
Fabricate panels of 16-gage furniture-grade steel
or 6063-T5 extruded aluminum alloy, totally
enclosed on four sides, with hinged door and keyed
lock with manufacturer’s standard shop-painted
finish and color.
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2.17
2.18
Provide UL-listed
voltage devices.
cabinets
for
use
with
line
3.
Within each panel/cabinet shall be mounted all
pneumatic relays, switches and accessories for the
respective system.
Mount all required gauges,
thermometers adjusting dials etc. on the door
face.
4.
Pneumatic,
electric
and
electric
pneumatic
devices, where panel mounted, shall be factory
wired to a terminal strip. All electric devices
shall be factory grounded to the cabinet.
5.
On the outside of the door face of each panel
shall be a full color schematic diagram of the
system it controls. Diagram shall be etched onto
a Bakelite panel or secured to the panel face and
covered with rigid Plexiglas in a hermetic manner.
6.
Provide securely laminated, embossed identifying
nameplates or numbers on or near each automatic
sensing, control motor or operating device.
7.
Provide inside the control panel a Digital Time
Switch capable of controlling all the heating,
ventilating and air-conditioning equipment. Unit
shall have battery back up.
Time Switch shall
have two channels capable of 20 ON/OFF pairs.
Unit shall provide for manual override to the next
scheduled event.
Unit shall provide LCD display
of time and day. Unit shall be TORK Model DIN 200
(2 channel).
Provide all the pipe and pipe fitting required as per
Section 15510 - HVAC Piping.
WIRELESS REPEATERS
A.
NYCSCA
2.
AIR PIPING
A.
12
DESIGN NO. _____
Wireless repeaters shall extend the range of the mesh
network and shall provide multiple data routes.
Repeaters shall have 15 user-selectable channels.
Wireless repeaters shall support up to 15 thermostats.
Power requirements shall be 110 VAC standard outlet
(converted to 3.3 VDC by repeater internal adaptor) or
5-30 VDC external DC power supply. Operating frequency
band shall be 2.4 GHz ISM Band. Repeaters shall be
equipped with omni-directional dipole antennas at 2.4
to 2.5 GHz. Units shall operate at 32oF to 122oF
conditions.
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2.19
DESIGN NO. _____
WIRELESS CENTRAL DATA STORAGE GATEWAY WITH USER INTERFACE
A.
11
Unit shall be Cypress Envirosystems Green Box/Hub or
Millennial Net Wi-Site Gateway. Unit shall be provided
with software user interface (Human Machine Interface –
HMI) with built in pages and ethernet connection to
hosted database for browser access to data, alarming,
scheduling and trending.
HMI shall be Cypress
Envirosystems’ WPT Dashboard or Millennial Net’s Wi-EMS
Remote HVAC Monitoring and Control.
HMI shall have
diagnostic features that provide health status of the
WPT network including the pneumatic pressure and
wireless thermostat status. Unit shall have the ability
to be used as a stand-alone or hosted system or as an
integrated part of a building automation system. Unit
shall be capable of responding to Auto-Demand Response
signals from utilities. Functional capabilities shall
include the ability to program WPT schedules, program
WPT occupied and unoccupied setpoints, report branch
pressures from WPTs, report space temperatures from
WPTs, report WPT setpoints, issue setpoint commands to
WPTs, provide low battery life alarms for WPTs and log
occupancy overrides. Unit shall be equipped with USB
hub
and
RJ-45 connector
or DB-9 connector
for
connection to PC.
Unit shall operate at 2.4GHz ISM
Band.
PART 3 – SUPPLEMENTAL EXECUTION
3.01
INSTALLATION
A.
All pneumatic piping/tubing shall be provided by the
Temperature Controls Contractor (TCC).
B.
All automatic temperature control work shall be
supervised by the automatic control manufacturer, who
shall furnish the necessary skilled supervisors as
required during the life of the Project.
C.
All temperature control motors, controllers, relays and
operating mechanisms shall be so located as to be
readily accessible for maintenance.
Provide access
doors for this purpose.
D.
Air Compressors: Install on a 4" concrete base. Mount
compressors and tank on vibration isolators.
Provide
seismic restraints. Braided hose connections are to be
used where the pneumatic piping connects to the
compressor. Compressors are to be mounted on floating
concrete inertia base or directly mounted to pad as
shown on the Drawings. Secure and anchor according to
manufacturers written instructions.
Pipe drains to
nearest floor drain. Provide the control air from
1
8
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compressor units through filter, pressure-reducing
valve, pressure relief valve, pressure gages, shutoff
and bypass valves as required and as necessary for a
complete operation.
E.
Refrigerated Air Dryer: Install the air dryers in such
way that the air remains uninterrupted during routine
maintenance, repair or any malfunction to any of the
refrigerated unit.
All drain connections should be
routed to the nearest floor drain keeping the runs as
short as is practical in order to reduce pressure on
the automatic drain valve.
F.
Filtering and Pressure Reducing Equipment:
G.
NYCSCA
1.
Oil Filter shall be installed in the piping with a
valved by-pass arrangement.
2.
Reducing Valves shall be installed on the
discharge side of the oil filter. Each parallel
branch shall be provided with gate valves arranged
in by-pass fashion so that either branch may be
used for the temperature control system.
Control Valves
1.
Install pneumatic steam valves with guards
indicated herein and as shown on the Drawings.
as
2.
Pneumatic water valves with guards shall be
installed as indicated herein and as shown on the
Drawings.
3.
All control valves shall be provided with
identification tags, as specified in Section
15502: HVAC Identification.
H.
Air Piping Systems: As per Section 15510: HVAC Piping.
I.
Pneumatic controls and tubing may not be used outdoor
where exposed to the weather.
Use only electric
controls where such controls must be located outdoor
exposed to the weather.
J.
Electrical Work: Division 16 Electrical Contractor
shall provide power supply wiring from power source to
power connection on controls and/or unit control
panels including starters, disconnects, and required
electrical
devices,
except
where
specified
as
furnished, or factory-installed, by manufacturer.
Interlock
wiring
between
electrically
operated
equipment units and between equipment and fieldPNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
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DESIGN NO. _____
installed control devices shall be provided
Temperature Controls Contractor (TCC).
K.
by
the
Installation of the Wireless Pneumatic Thermostat (WPT)
system shall be performed by a contractor trained and
certified by the WPT manufacturer.
3.02 INSTALLATION OF DAMPERS
5
3.03
6
9
5
NYCSCA
A.
Refer to Section 15915 - Dampers.
Mechanical
Contractor shall furnish and install field dampers.
FIELD TESTS
A.
Pressure Test for New Backbone and Branch Lines: All
new air lines shall be subjected to an air test with a
test pressure of 1.5 times the operating pressure. All
tests will be for one hour duration. All tests will be
conducted prior to the installation of sensing, control
or motor devices. Allowable pressure drop shall be ½
psi over the one hour period. This test shall be made
in the presence of the Authority. The Contractor shall
notify the Authority in writing at least three days
prior to such test. All leaks shall be repaired.
B.
Pressure Test for
Existing
Backbone Lines: The
following standards and procedures are issued to limit
replacement cost of pneumatic air distribution systems
where a certain acceptable leakage rate may occur and
to provide for consistent installations throughout the
school system.
Backbone pressure testing procedures
outlined herein shall be applied to work in progress
where NOD’s for repairs have not been issued and on
projects where work has not commenced to replace the
pneumatic air backbone system beyond the contract
defined Scope of Work.
The overall goal is to obtain a pneumatic system that
properly pressurizes the thermostats and does not run
with an as-built compressor (existing to remain or new
contract compressor) that has a duty cycle that exceeds
50%.
The pneumatic air distribution system consists of two
components including (i) the main air header, one riser
to each floor from the header and individual floor
mains and MER main air piping, hereinafter referred to
as the “backbone” system; and, (ii) branch air lines
from room thermostats to control valves and damper
motors, hereinafter referred to as the “Branch” system.
The backbone system and Branch system are collectively
called the “Distribution” System.
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Existing pneumatic control systems shall undergo a
pressure test on the backbone system utilizing a test
pressure equal to the maximum operating pressure. (New
air lines shall be tested at 1.5 times the maximum
operating pressure.)
Backbone Pressure Test Procedure
Backbone tests described herein shall be witnessed by a
representative of the Engineer of Record, the CM or PO,
the CID Inspector, the Contractor and the Temperature
Control Contractor (TCC) (Branch system lines will not
be tested and will be replaced on an as needed basis).
After the backbone has been tested/repaired and after
the pneumatic devices (thermostats, control valves,
etc.) have been replaced,
the Contractor shall
demonstrate to the PO or CM, Engineer of Record and CID
Inspector any lack of control due to faulty branch
lines.
Those problematic branch lines shall be
replaced with surface mounted lines (per Article
3.03.C) on an as needed basis.
Step 1: If the existing compressor has not been
demolished and the Distribution system has not been
modified, isolate the existing compressor and storage
tank from the Distribution system by closing the
isolation valve and run the existing compressor to
determine if it is capable of pressurizing the tank
usually to 60 or 80 psi. If it can not achieve tank
pressure, then a Backbone test will have to be
conducted using a test compressor preferably with a
makeup capacity equal to the final as-built compressor.
Step 2: Pressurize the Distribution system by running
the compressor for one hour and monitor minutes of
operation and minutes of off time. If the duty cycle
does not exceed 50%, and a pressure equal to the
operating pressure has been measured and verified at
the furthest thermostat in each Distribution zone, then
the backbone will be deemed acceptable and will not
require repair. If the duty cycle exceeds 50% then go
to Step 3.
Verify the last thermostat on the most
remote line is receiving a pressure equal to the
operating pressure.
If the test is run with a test
compressor that has a free air capacity that is
different than the final as-built compressor, the
Engineer of Record shall define what the acceptable
duty cycle should be when testing with the test
compressor. This test compressor acceptable duty cycle
is one that would provide a 50% duty cycle if the asbuilt compressor were used for the test.
Step 3: This step will isolate the backbone from the
Branch system by removing existing pneumatic room
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7
DESIGN NO. _____
thermostats and capping each main air supply at each
room thermostat.
Also, if Air Handling Units exist,
cut and cap the main air supply to each duct thermostat
and other air consuming devices such as receiver
controllers and temperature sensors. Any new controls
for the Air Handling Units (if part of the scope of the
project as indicated on the Drawings) shall be direct
digital controls (DDC).
Before testing the backbone,
the TCC shall attempt to find and repair backbone leaks
that can be identified in the basement or other exposed
existing backbone air piping, if any.
The isolated
backbone shall then be pressurized using the compressor
to determine if the duty cycle of the final as-built
compressor will be 50% or less including backbone
leakage and the new calculated air consumption from the
room thermostats and other air consuming loads.
The
TCC shall provide the Engineer of Record with the SCIM
consumption of new pneumatic devices.
The duty cycle of the compressor will not be 50% at
this time since the compressor is only running to
makeup the backbone leakage.
The acceptable duty cycle here is the one that equates
to 50% duty cycle using the final as-built compressor
when the compressor makes up the SCIM consumption of
all the devices PLUS also simultaneously makes up the
acceptable backbone leakage.
Pressurize
the
backbone
system
by
running
the
compressor for one hour and monitor minutes of
operation and minutes of off time. Measure the supply
pressure at the furthest thermostat in each zone or if
only one zone, measure the supply pressure at the last
thermostat on the top floor.
If the test determines that the final as-built
compressor will operate at a 50% or less duty cycle and
the operating pressure has been measured and verified
at the furthest thermostat, then the backbone will be
deemed acceptable and will not require repair.
If the test determines that the final as-built
compressor will operate at greater than a 50% duty
cycle, the backbone system will be deemed to have
failed the test and require repair/replacement.
The TCC shall prepare a report of the findings of the
backbone test.
Step 4:
The Engineer of Record shall prepare a
Bulletin defining the Scope of Distribution System
replacements based on the backbone test results and the
Contractor’s demonstration of any leaking branch lines.
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DESIGN NO. _____
The amount of work, if any, over/under the work scope
defined in the Contract, shall be identified in the
Engineer’s Bulletin.
Step 5: After all repairs have been completed by the
Contractor and all contract pneumatic devices have been
installed,
the
Contractor
shall
pressurize
the
Distribution system to verify that the final as-built
compressor duty cycle does not exceed 50% by running
the compressor for one hour and monitoring the runtime.
C.
Installation Standards for Repairs and Replacement of
the Distribution System:
Corridor Backbone Lines
A one-half inch hard copper header shall be installed
from the pressure reducing station area to the location
of where the risers will be installed.
Each floor
shall be provided with a 3/8” main air supply line
riser from the basement to the floor.
A 3/8” floor
main shall be installed with hard copper surface
mounted on the hallway ceiling, at or near the
underside of slab, without surface metal raceway. Any
exposed 1/4” taps from the floor main to each room
(where a thermostat is located) shall be installed in
hardshell tubing without surface mounted conduit. All
tubing installed above suspended ceilings need not be
encased in surface mounted conduit. All tubing
installed in corridors need not be encased in surface
mounted conduit.
Classroom Branch Lines
Horizontal leaking concealed branch tubing running
within or behind walls shall be replaced with surface
mounted softshell copper tubing installed in surface
mounted conduit 10 feet above finished floor in
classrooms, offices, gyms, playrooms, cafeteria’s and
other occupied rooms.
If the 10ft elevation is not
possible, the horizontal tubing encased in surface
mounted conduit may be installed lower, but in no case
less than 7’ AFF.
Vertical drops may be installed
lower than 7’ AFF for drops to thermostats and control
valves.
All such vertical drops shall be encased in
surface mounted conduit.
D.
5
NYCSCA
Operational Test of Equipment
Test all thermostats, control valves, controllers and
damper operators to insure that adequate pressure is
available for proper operation. Correct functioning of
PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH
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DESIGN NO. _____
damper and pneumatic Variable Air
operation shall be demonstrated.
E.
Volume
(VAV)
box
Wireless Site Survey
Contractor shall perform a site survey to determine the
types,
counts
and
locations
of
the
wireless
thermostats, repeaters and gateway controllers.
The
results of the site survey shall be compared to the
scope of work as defined on the contract drawings.
Bring any potential work scope deviations to the
attention of the Architect/Engineer of Record.
3.04
3.05
ADJUSTING AND CLEANING
A.
Start-Up: Start-up, test,
control
system
shall
manufacturer's authorized
Demonstrate compliance
damaged or malfunctioning
and adjustment of temperature
be
in
the
presence
of
personnel and the Authority.
with requirements. Replace
controls and equipment.
B.
Cleaning: Clean factory-finished surfaces. Repair any
marred or scratched surfaces with manufacturer's
touch-up paint.
C.
Final Adjustment: After completion of installation,
adjust thermostats, control valves, actuators and
similar equipment provided as work of this section.
Final adjustment shall be performed by specially
trained personnel in direct employ of the Temperature
Control Manufacturer.
DEMONSTRATION/INTERDISCIPLINARY PRE-START
TESTS/FUNCTIONAL PERFORMANCE TESTS
A.
B.
UP
&
START
UP
Engage a factory-authorized service representative to
demonstrate
and
train
DOE
maintenance
personnel
(Custodian and DOE Maintenance Representative) to
adjust, operate and maintain control systems and
components.
1.
Train DOE maintenance personnel on procedures and
schedules for starting and stopping, troubleshooting, servicing, and maintaining equipment and
schedules.
2.
Provide
operator
training
on
calibration and adjusting devices.
any
required
Interdisciplinary Pre-Start-Up and Start-Up Tests:
The Contractor shall conduct interdisciplinary prestart up and start up tests as per the manufacturer’s
start up procedures.
Contractor shall submit signed
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start up affidavit signed by the factory authorized
service representative indicating that all of the
manufacturer’s pre start up and start up procedures
have been successfully completed.
C.
Functional Performance Tests:
Contractor
shall
also
submit
signed
functional
performance testing affidavit signed by the factory
authorized service representative indicating that all
of the manufacturer’s functional performance tests have
been successfully completed.
3.06
COMMISSIONING OF PNEUMATIC CONTROLS
A.
HVAC Contractor shall comply with the Commissioning
Requirements as presented herein (Interdisciplinary
Testing, Functional Performance Testing, Custodial
Training, O&M Manuals) for the pneumatic controls of
the terminal equipment.
B.
All diagnostic testing of the backbone terminal
pneumatic control piping/tubing as defined in Article
3.03 shall be completed prior to commencement of the
commissioning process.
END OF SECTION
BB
01/29/16
Notes to Specifier (Delete from Specifications)
1.
Section 15503 is to be utilized if the project involves
construction of a New Building or Addition to building in
Seismic Design Category C or D. Section 15503 is also to be
utilized if project involves retrofit work in Existing
Buildings in Seismic Design Category C or D constructed
after LL17/1995 went into effect. Use Section 15504,
Vibration Isolation, (without seismic restraints) for
retrofit work on Existing Buildings constructed prior to the
effective date of LL17/1995 and for any buildings in Seismic
Design Category B.
2.
Pressure Reducing Valve: 19/15 psi are nominal pressures,
which may differ, according to the control manufacturer's
standard or field conditions. Edit as required depending on
the specific pressures to be attained and how many
reductions are required.
3.
The salvage of equipment scheduled to be removed is to be
addressed in the scoping/design phase of new projects. The
A/E of Record shall contact the NYC Department of Education
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DESIGN NO. _____
Central Repair Shops in order to determine whether there is
any interest in salvaging the components scheduled to be
removed.
Equipment designated to be salvaged shall be
specified by the A/E to be delivered by the Contractor to a
location designated by Shops. The specific equipment to be
salvaged and specific delivery location shall be precisely
detailed in the bid documents.
4.
This Section shall only be used for Capital Improvement
Projects.
New Buildings and Major Modification projects
shall utilize a full wired network BMS/DDC system as defined
in Section 15970, Temperature Control System (LonWorks
BMS/DDC with School Operating Console).
In the case of
retrofit/repair work to older systems whereby the terminal
units are to be controlled by wireless pneumatic controls,
the new control system shall be a hybrid of stand-alone
central unit digital controls (boilers, chillers, rooftop
units, air handling units, etc.) and the terminal units
shall be wireless pneumatically controlled.
See Note 7
below.
The DDC Only central units and wireless pneumatic
terminal unit controllers shall not be interconnected onto
the same wireless network. Specification section 15971
“TEMPERATURE CONTROL SYSTEM – (LONWORKS DDC-ONLY WITHOUT
NETWORK)”, describes the work pertaining to the central unit
stand alone digital controls. Specification section 15974,
“PNEUMATIC TEMPERATURE CONTROL SYSTEM WITH SPACE WIRELESS
PNEUMATIC THERMOSTATS (WPT)”, describes the work pertaining
to the terminal wireless pneumatic control system.
5.
For terminal pneumatic damper actuators not packaged with
the central air handling unit or air conditioning unit.
Packaged damper actuators will be electrically controlled
(unless project is less than $2,000,000 dollars or project
involves climate control upgrade involving the air handling
units and also involves installation of boilers/heating
plant upgrades. See Note 7 below).
6.
The Contractor’s backbone field tests and wireless site
survey required to determine types, counts and locations of
wireless thermostats, repeaters and gateway controllers are
in addition to the Architect/Engineer of Record’s backbone
field tests and wireless site survey done during the scoping
cycle to determine the bid set work scope. Contractor field
testing of the backbone is being required to determine if
there is any additional required backbone repairs beyond
that defined in the Architect/Engineer of Record’s bid set.
The Contractor’s backbone pressure testing will be applied
to Work in progress where NODs for repairs have not been
issued and when work has not commenced to replace the
pneumatic air backbone system beyond the Contract defined
work scope.
The Contractor’s field test is done for the
purpose of verifying the work scope baseline of the bid
documents so as to minimize the cost of the field change
orders.
Branch tubing will not be tested but rather
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replaced on an as needed basis with new surface mounted
pneumatic tubing. Architect/Engineer of Record shall include
an Allowance in the bid set for a specific length of branch
tubing estimated based on the Architect/Engineer of Record’s
field inspection during the scoping phase.
7.
Edit as required.
In general, pneumatic controls for the
Air Handling Units shall not be replaced in kind.
They
shall be replaced (if necessary) with stand alone direct
digital controls (DDC) as defined in Section 15971 to meet
the 5% LL86/05 energy reduction mandate for CIP projects
involving work done to the central ventilation air handlers.
Refer to Design Requirements 6.2.20 and 6.2.31. According to
Title 43 Chapter 10, Capital Projects for the installation
of boilers at an estimated construction cost of 2 million
dollars or more are not required to also comply with the
energy reduction requirements for the installation of HVAC
comfort controls. Accordingly, pneumatic controls may be
replaced in kind in the air handlers when the comfort
control project also involves the installation of new
boilers/heating plant upgrades. In this case, variable
frequency drives and demand controlled ventilation with
carbon dioxide control need not be provided for the air
handling units. Also, pneumatic controls may be replaced in
kind in the air handling units for projects involving the
repair/replacement of the central ventilation units at an
estimated construction cost for such installation or
replacement of less than two million ($2,000,000) dollars
(Refer to Design Requirement 6.2.31).
8.
Architect/Engineer of Record’s Acoustical Consultant shall
determine the nature of the mounting of the air compressor
to minimize noise. Edit specification as required.
9.
Edit as required based on Architect/Engineer of Record’s
field test of the existing compressor conducted during the
scoping phase.
10.
Edit as required if central units are to have standard
pneumatic controls or stand alone direct digital controls.
11.
Architect/Engineer of Record’s design documents should define
a new dedicated PC for the Custodian to be used for the Human
Machine Interface (HMI) as described in Article 2.19.A.
12.
Designer shall route the appropriate 110 VAC power or 5-30
VDC external power supply to the Designer’s chosen repeater
for their basis of design.
* * *
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DESIGN NO. _____
LIST OF SUBMITTALS
SUBMITTAL
DATE SUBMITTED
DATE APPROVED
Product Data:
______________
_____________
Air Compressor: Calculation:
Receiver Tank Sizing
______________
_____________
Shop Drawings:
______________
_____________
Schedule:
______________
_____________
Maintenance Data:
______________
_____________
Field Test Reports:
______________
_____________
Written Guarantee:
______________
_____________
Contractor’s Start-Up and
Demonstration Affidavit
______________
____________
Contractor’s backbone field
tests and wireless site survey
results
______________
____________
1. Manufacturers Product Data
2. Installations Instructions
3. Start-up Instructions
1.
2.
3.
4.
5.
6.
Wiring Diagram
Piping Diagram
Schematic Flow Diagram
Label Control Device
Control Panels
Control Valve: Valve
Characteristics Certification
7. Thermostat Location
1. Maintenance Manuals
Maintenance Material:
1. Keys/Wrenches for Thermostat
Cover Removal
* * *
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