University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 1
PART 1 – GENERAL
.1
DESCRIPTION
.1
All drawings and all sections of the specifications shall apply to and form an integral part
of this section.
.2
CHILLED WATER SERVICE
.1
The cooling source for this project is the campus chilled water supply.
.2
Fort Garry Campus - The distribution loop is sized for a 10°F water temperature
difference and individual buildings are to be designed for chilled water temperature
ratings of 44°F (EWT) to 54°F (LWT). Chilled water is available only during summer
months on the Fort Garry campus.
.3
Bannatyne Campus - The distribution loop is sized for a 10°F water temperature
difference and individual buildings are to be designed for chilled water temperature
ratings of 42°F (EWT) to 52°F (LWT). Chilled water is available year-round on the
Bannatyne campus.
.3
STEAM SERVICE
.1
The heating source for this project is the campus steam supply.
.2
During the winter, the Fort Garry Campus central steam is supplied at 125 psig and
370°F, which places the steam into superheat condition. All equipment installed to handle
this steam is to be rated for superheat application and service. Smaller boilers are used
during the summer to supply 80psig saturated steam. All connected heating equipment
that is meant to operate year round must be sized to handle this steam supply variation.
.3
On the Bannatyne Campus, steam is supplied from Health Sciences Centre (HSC)
central plant at 125 psig saturated. Shut down periods of this steam supply are to be
verified with HSC.
.4
COMMISSIONING
.1
Refer to Section 01810 Quality Commissioning for the details of the commissioning process.
.5
QUALITY ASSURANCE
.1
Execute work of this section only by skilled tradespeople regularly employed in the
installation of pressure piping systems and heating and cooling equipment.
.2
Install all equipment and material in accordance with Manufacturer’s recommendations.
PART 2 – PRODUCTS
2.1
AIR COMPRESSOR
.1
Where indicated on the drawings, provide one 2-stage Pacific/Ranger Engineering
#252H80-7.5 air-cooled reciprocating air compressor complete with 7.5 HP motor, 80 gal.
Receiver ASME rated at 200 psi working pressure, capable of 25 CFM at 100 psi. This
unit to also be complete with matched set V-belt drive, pressure switch for automatic
start/stop, check valve, air cooled after cooler, drain valve, belt guard, silenced inlet filter
and pre-wired automatic drain.
.2
Provide a refrigerated type air dryer Model #RRD25A to operate to a pressure dew point
of 2AC. Dryer to be supplied with a power cable and plug for 115V/1/60, Freon suction
gauge, air outlet pressure gauge, temperature gauge, running and high temperature
lights, automatic drain trap for condensate and Model #RF-3 high efficiency prefilter
ahead of the dryer for 99.99% efficiency referred to 0.1 micron and air inlet temperature
gauge.
.3
Provide Pacific/Ranger Model No. F07313A pressure reducing valves c/w pressure
gauges on high and low pressure side of valve.
.4
Pressure reducing valves and secondary filters to be provided as indicated in the plans.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 2
.5
Power wiring of air compressor and refrigerated air dryer by Division 16 Sub-Contractor.
Provide all required motor control wiring.
2.2
AIR COOLED CONDENSERS
.1
Provide air-cooled condensers consisting of fans, controls and coils, with integral
subcooling, supporting casing with stand, and vibration spring isolators.
Coils:
aluminium plate fins on mechanically expanded copper tubes, cleaned, dehydrated,
sealed, leak tested at 1000 kPa (150 psi), and pressure tested at 2900 kPa (420 psi).
Fans: direct drive, propeller type protected by guards. All motors: permanent split
capacitor type pre-lubricated, with built-in overload protection.
.2
Fan shaft: corrosion protected. Fan blades: Iridite or aluminium finish. Magnetic
contactors: mounted and factory wired to power and control numbered terminals.
.3
Relays, contactors and controls: mounted and factory wired to provide interlock with
chiller control circuit. All fans to cycle to maintain constant head pressure down to 10C
outdoor ambient.
.4
Casing: Weather Armor baked enamel finish. Provide access panels for electrical
connections.
.5
Capacities and characteristics: As shown in the equipment schedules.
2.3
AIR COOLED CONDENSING UNITS
.1
Provide air-cooled condensing units consisting of fans, controls and coils, (with integral
subcooling, supporting casing with stand, and vibration spring isolators. Coils:
Aluminium plate fins on mechanically expanded copper tubes, cleaned, dehydrated,
sealed, leak tested at 1000 kPa (150 psi), and pressure tested at 2900 kPa
(420 psi). Fans: Direct drive, propeller type protected by guards. Fan motors:
Permanent split capacitor type pre-lubricated, with built-in overload protection.
.2
Fan Shaft: Corrosion protected. Fan blades: Iridite or aluminium finish.
.3
Relays, Contactors and Controls: Mounted and factory wired to provide interlock with
indoor air supply fan control circuit. All fans to cycle to maintain constant head pressure
down to 10ºC outdoor ambient. Provide low ambient head pressure control as indicated
in equipment schedules.
.4
Casing: Surfaces shall be cleaned with a degreasing solvent to remove oil and metal
oxides and primed with a two-part acid based etching primer. Finish coat shall be
electrostatically applied enamel, to all exposed surfaces. All unprotected metal and
welds shall be factory coated. Provide access panels for electrical connections.
.5
Construction to ASME code, ARI standard 590-69, and CSA requirements (CSA
labelled).
.6
Compressors to be complete with oil pump, suction and discharge valves, individual
spring vibration isolators, thermally protected motors, crank case heater, operating oil
charge; extended parts and labour warranty for four (4) years. Reciprocating, scroll or
screw type compressors are acceptable. Compressors up to and including 15 tons
capacity may be hermetic sealed unserviceable type. Compressors (20 tons capacity and
greater) to be semi hermetic serviceable.
.7
Overcurrent Protection to include factory installed circuit breakers calibrated manual
reset, ambient insensitive, to open all 3 phases if overloaded on any one phase.
.8
Refrigeration Circuits: Discharge line check valves (on combined circuits), combination
moisture indicator and sight glass, filter/driers, charging valves, suction lines insulated
with closed-cell Armaflex (20mm thick min.) on individual circuits. Provide discharge,
suction and oil pressure gauges on compressors 20 tons capacity and greater.
.9
Capacity Control: Multiple-step compressor cylinder unloading to provide compressor
sequenced starting and loading. Provide hot gas by-pass where indicated on the
equipment schedules – on restart unit to revert to lowest stage of capacity.
.10
Safety and Operating Controls: Prewired and prepiped motor contactors, high and low
pressure cut-outs, oil failure, cut-out, start-stop switches, control power circuit breakers
and manual lead-lag switch for compressors.
.11
Electrical Connections: Power connections to unit Manufacturer supplied lugs at one
point only. Control connections to unit Manufacturer supplied numbered terminal board.
February 27, 2015
University of Manitoba
HEATING AND COOLING
Req #
Page 3
.12
2.4
Section 15700
Capacities and characteristics are shown in the equipment schedules.
AIR HANDLING UNITS
.1
Provide factory-built air handling units in the arangements and types shown on the
drawings and as specified.
.2
Unit casing shall be of minimum 16 gauge (1.6mm) satin coat galvanized sheet metal.
Surfaces shall be cleaned with a degreasing solvent to remove oil and metal oxides, and
be primed with a two-part acid-based etching primer. Finish coat shall be an
electrostatically applied enamel, to all exposed surfaces. All walls, roofs and floors shall
be of formed construction, with at least two breaks at each joint. Joints shall be secured
by sheet metal screws or pop rivets. Wall and floor joints shall be broken in and, on all
outdoor units roof joints broken out (exposed) for rigidity. All joints shall be caulked with
a water resistant sealant. All unprotected metal and welds shall be factory coated.
.3
Air unit insulation to be 50mm (2”) interior neoprene coated insulation for cabinet and
50mm (2”) rigid insulation on casing floor with condensate pans and drains. Provide solid
metal liner throughout unit.
.4
Units shall be provided with access doors to allow access to all interior components
including fans and motors; filters; dampers and operators; access plenumsand
humidifiers/wet cells; electrical control panels; burner compartments; compressor
compartments. Access doors shall be large enough for easy access. Removal of
screwed wall panels will not be acceptable. Provide hinged access doors in welded steel
frames. Doors shall be fully lined with closed cell bulb gasket and Leverlok handles,
operable from both sides. Access doors shall incorporate 10" x 10" (250 mm x 250 mm)
single pane tempered glass viewing window.
.5
Provide marine lights with Lexan bulb covers in each section provided with an access
door. Lights shall be wired in EMT conduit to a switch with pilot light. Division 15 shall
pay Division 16 to wire light circuits.
.6
Fans: statically and dynamically balanced centrifugal DIDW with shafts operating less
than 80% of first critical speed, bearings selected for average life of 150,000 hours and
provided with lubrication fittings extended to the drive side for convenient servicing. Refer
to fan schedule in section 15800.
.7
Volume control where specified in equipment schedules: Variable speed drive – refer to
Section 15725.
.8
Filters: Refer to Section 15800 – Air Distribution for filter requirements.
.9
Provide differential pressure gauges to read pressure differential across each filter bank.
Refer to Section 15800 – Air Distribution for details of gauges. Scale of gauge to read at
approximate midpoint when filters require service or replacement. Mount gauge on the
exterior of the unit on the service side and provide indication of clean and loaded filter
pressure drops.
.10
Coils: ARI rated. Provide hinged, cam latched and insulated access doors on air leaving
side of coil section. Locate access door on service side of unit.
.11
A full width casing section with access door shall be used to separate all coils.
.12
Insulated casings and plenums shall be specified for all units, including those serving
heat and vent applications. Casings for heat and vent applications shall have space for
installation of future cooling coil.
.13
Mixing dampers: Refer to 15910 Controls for requirements for all dampers.
.14
Units shall be installed to allow removal of all coils and filters. Clearance equal to fullfinned width of coil shall be provided to facilitate removal.
.15
Units shall be mounted on internal vibration isolators and concrete housekeeping pads.
.16
Units shall have a mixing box and filter box or a combination filter/mixing box properly
sized so as not to exceed the filter Manufacturer's recommended face velocities. Low
leakage dampers as specified in Specification Section 15910 shall be provided for fresh
air intakes.
.17
Air blending-devices shall be installed on all central station air-handling units where air
stratification is a problem.
.18
All cooling coil drain pans shall be stainless steel. Cooling coil drain pans shall be
fabricated of stainless steel as an integral part of the floor panelling, and be a minimum of
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 4
.19
.20
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50mm (2") deep, with welded corners. Drain pans shall extend a minimum of 300mm
(12”) downstream of coil face and be provided with a 40mm (1½”) stainless steel drain
connection. Drain pans must be sloped and pitched such that there is no standing water.
Intermediate drain pans shall be provided between cooling coils where required for
effective moisture removal.
Drives: Complete with motors as specified in Section 15050, adjustable motor slide rail
or pivot base, adjustable sheaves and belts.
Belt Guards: Expanded metal-type with 25mm (1”) diameter tachometer openings at
both fan and motor shafts. Provide one opening through an adjustable plate to
compensate for motor position adjustments.
Provide fixed sheaves for drives over 5.6 kW (7.5 HP). For either type of sheave (fixed or
variable pitch), provide a second set as required by the TAB firm if field testing proves
this necessary.
Vibration Isolation: Spring isolators for either suspended or floor mounted application.
Refer to Section 15860.
2.5
ALTERNATOR FOR DUPLEX PUMPS
.1
Where pump alternation is not provided by the DDC system, provide duplex indoor
control panels where specified, where shown on the drawings, and/or where required to
achieve specified functionality.
.2
Duplex panel to be equal to ITT CentriPro Model CDD duplex liquid level controller, with
automatic alternation for two pump operation.
.3
Panel to have high level alarm warning designed for sump, effluent, sewage, and water
transfer applications.
.4
Panel to be equipped with a NEMA 1 flashing red light, 95db alarm horn with silence
button, door mounted disconnect, auxiliary alarm contact which is to be connected to
alarm campus DDC system.
.5
Provide required float switches for off, lead, lag, and alarm switching.
2.6
BOILER INSTALLATION
.1
Upon notification of completion of the installation, the manufactures shall provide the
services of the representative’s field technician to:
.1
Provide a “dry run” of control sequences in the presence of a Manitoba
Department of Labour representative.
.2
Ignite boilers and set low fire to allow "boil out” of the pressure vessel by the
installer.
.3
Check operation of steam boiler level control and feed water pumps.
.4
Fire boilers to load and adjust controls and fuel/air ratios to operation operating
conditions.
.5
Record combustion performance over the firing range and prepare a
combustion/efficiency analysis report for the owner and consulting engineer.
.6
A minimum of 15 hrs on site shall be provided, for start up plus one additional 7hr visit to site for owner training.
2.7
BOILER WARRANTY
.1
Each boiler shall carry a two year warranty, from date of acceptable startup and
acceptance by the University of Manitoba.
.2
Each boiler shall carry a 20-year prorated warranty against damage caused by “thermal
shock".
2.8
CENTRIFUGAL CHILLER
.1
Provide, as shown on the drawings, hermetic [open] centrifugal [high] [or] [low]
pressure packaged water chillers[s] complete with all accessories necessary for the safe
and proper operation [of each unit] and as follows:
.2
Central Control Panel:
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 5
.1
.3
.4
.5
.6
.7
.8
.9
.10
.11
.12
.13
Provide a unit mounted, factory prewired DDC microprocessor based control
system with alphanumeric display and touch sensitive switches and password
security to prevent access by unauthorized personnel.
.2
Unit control panel to display the following operating data:
.1
Entering and leaving, chilled and condenser [and heat recovery] water
temperatures.
.2
Evaporator, suction, discharge, condensing and liquid refrigerant
temperatures.
.3
Evaporator and condenser pressure.
.4
Actual motor amps and motor amps as a percent of RLA.
.5
Oil feed and sump temperature. Oil pressure.
.6
Total hours of operation and number of starts.
.7
Hours since last start.
.8
Unit status including Start-up and shut-down sequence, and Operational
status.
.9
Entering water reset Off/On.
.10
Remote reset Off/On.
.11
Soft loading Off/On.
.12
Low pressure unloading Off/On.
.13
Maximum AMP limit Off/On.
.14
Remote demand limiting Off/On.
.15
Manual AMP limit.
.16
Leaving evaporator setpoint.
.17
Reset leaving setpoint.
.18
Remote reset signal.
.19
Fault history (last eight (8) faults).
Control logic to diagnose and display specific faults on digital readout as follows:
.1
No starter transition.
.2
Low/High oil sump temperature.
.3
Low evaporator pressure.
.4
High discharge pressure/temperature.
.5
Compressor surge.
.6
Low refrigerant charge.
.7
No evaporator/condenser flow.
.8
Low oil pressure.
.9
High motor current.
.10
Sensor failure.
Manually adjustable demand limiter and chilled water setpoint from controller keypad.
Dedicated Manufacturer supplied and contractor installed sensors to display entering and
leaving chilled water, and leaving and entering condenser water temperatures.
Surge detection to determine if chiller is operating in surge. Upon recognition of a surge
situation the controller to shut down the chiller and announce an alarm condition.
Provide manual control over variable inlet vanes.
Chilled water reset module to increase supply water temperature based on a 4-20 Madc
or 0-10V DC input form Building Automation System. In addition, the chilled water
setpoint to be resettable by return water temperature if so programmed.
Chiller current demand limiter module to reset current demand based on a 4-20 mA dc or
0 - 10V DC input from Building Automation System. Provide a softload function to
prevent the chiller from operating at full load during initial pull down.
The control panel to employ PID control algorithms to ensure precise leaving chilled
water temperature control.
Provide for auto-restart after a power failure. Microprocessor memory to be non-volatile
requiring no battery back-up while maintaining programmed data during an extended
shut-down or power failure.
Communications interface panel for connection of unit control panel to the Building
Automation System to permit input to BAS of all faults and status including:
Entering and leaving evaporator water temperature.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 6
.14
.15
.16
.17
.18
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Entering and leaving condenser water temperature.
Refrigerant temperatures and pressures including evaporator, suction line, superheat,
discharge, condenser, liquid line, liquid subcool and condenser approach.
Oil temperature and pressure.
Motor current and motor percent RLA.
Operating hours and number of starts.
Points to be accessible for change in setpoint or status (read/write) by the BAS are start,
stop, clear fault, leaving and reset evaporator setpoint, and manual amp limit.
Low pressure chillers may be accepted provided they are furnished with a high efficiency
purge unit designed to release a maximum of 0.1 pounds of refrigerant per pound of
purged air, a vacuum prevention system to maintain 0.05 PSIG inside the vessel during
non-operational periods, a reseatable relief device in series with the rupture disc and one
(1) refrigerant detection device per chiller capable of monitoring at a level of 10 PPM.
Factory mounted separate force feed oil lubrication system with oil cooled via an integral
cooling system or via water cooled factory installed oil cooler. Supply oil heater to
maintain oil temperature high enough to minimise affinity for the refrigerant.
Flow switches on evaporator and condenser circuits.
Oil by-pass filter.
Hot gas by-pass.
Vibration isolators – Refer to Section 15100.
Evaporators and condensers:
.1
Evaporator and condenser to be shell and tube, cleanable type with integrally
finned copper tubes. Evaporator tubes to be 0.035” thick. Condenser tubes to
be 0.035” thick. Water heads to be removable and have flanged connections.
Provide vent and drain taps, liquid shut-off valve, purge valve and reseatable
spring-loaded relief valves. Provide refrigerant and waterside constructed and
stamped in accordance with ASME Requirements. Provide CRN numbers on
each shell. Test evaporator and condenser at 1.3 times the maximum operating
pressure, but not less than 100 psig.
.2
Complete evaporator water circuit to be rated at 150 [250] [350] PSIG. Complete
condenser water circuit to be rated at 150 [250] [350] PSIG.
.3
Provide Marine Water Boxes for condenser and evaporator with removable
gasketed steel plate water box covers exposing all tubes without disturbing the
water piping connections. Specified water pressure drops are for entire shell and
water box combination and must not be exceeded.
.4
Provide vinyl nitrate polymer insulation factory applied to evaporator, non
connection water head, suction piping, compressor inlet, motor housing and
motor coolant suction line. Factory paint all insulation with a resilient epoxy
finish. Evaporator connection water box to be field insulated by the contractor
after pipe connections have been made.
A factory mounted and wired (on same side as control panel), CSA approved star/delta
reduced voltage starter in a CEMA enclosure conforming to machine requirements with:
A CSA approved remote closed transition combination star/delta reduced voltage starter
in a CEMA enclosure conforming to machine requirements with:
.1
.2
.3
.4
.5
.6
Control circuit transformer sized to handle oil heater, purge pump and oil pump
starter. Provide two sets of auxiliary contacts on the main run contactor for
status.
Three magnetic overloads – one for each leg.
Protection against under voltage, ground fault, phase loss, phase unbalance, and
over-amping. Provide a lockout stop switch.
Ammeter with 3-position selector switch.
Voltmeter with 3-position selector switch.
Disconnect: Front operated interlocked with front latch, ‘Quick-break’ positive
acting with HRC fuses and solderless lugs.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 7
.7
.29
.30
.31
.32
.33
.34
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Power factor correction capacitors to correct full load power factor to not less
than 0.95.
.8
Watt-hour meter.
Performance as indicated in the equipment schedules. Construction and ratings to be in
accordance with latest ARI Standard 550, ANSI/ASHRAE 15, CSA B52 and ASME.
High pressure chillers to operate using HFC 134a. Low pressure chillers to operate using
HCFC 123.
The chiller to be complete with an internal pump down system allowing the entire
refrigerant charge to be held in the condenser at 90F. The system to include tight seating
isolation valves at the entrance and exit. Where the Manufacturer cannot pump the
refrigerant into the condenser, a remote ASME rated storage vessel and pump out
systems are to be provided.
Motor to be refrigerant cooled, high efficiency type. Thermistors in the windings are to
stop the compressor if excessive temperature is sensed in any one of the three windings.
Provide factory installed surge capacitors wired to the motor circuit.
Capacity control to be accomplished by the use of hydraulically operated inlet guide
vanes and moveable discharge diffuser. Capacity controls to allow modulation from
100% to 10% of scheduled conditions without the use of Hot Gas Bypass.
The unit is to be assembled on a suitable steel base and shipped with a full operating
charge of refrigerant and oil.
The chiller is to be completely run tested at the factory. All operations, safeties and
starter functions to be checked. The Manufacturer is to provide documentation indicating
the chiller was factory tested.
Alarm Panels:
.1
Provide two (2) refrigerant leak detection and alarm panels. Mount one panel
inside the Mechanical Equipment Room (MER) and one panel directly outside
the MER adjacent to the entrance doors.
.2
Each panel to contain an audible alarm, a visual alarm, a manual switch and
automatic contact closure to activate the emergency mode of the mechanical
ventilation system for the MER, an emergency chiller shut-off switch and a green
pilot light to indicate normal operation of the ventilation system.
.3
The master panel located inside the MER to also contain a system OFF-AUTO
switch, a system enabled green pilot light, refrigerant leak detector test push
button, chiller alarm test push button, system reset button, 24 volt control power
transformer, number terminal strip, one set of dry contacts for input to the BAS to
indicate a refrigerant leak and one set of dry contacts for input to the BAS to
indicate a chiller alarm condition.
.4
The master panel to be powered from a 120 volt circuit. The remote panel and
refrigerant sensor to be powered through this master panel.
.5
Provide a refrigerant sensor mounted in close proximity to the chillers and wired
to the master panel. The refrigerant sensor to be calibrated to detect refrigerant
levels equal to or less than the TLV-TWA for the refrigerant used. The alarm
system to be activated when the refrigerant concentration in the MER equals the
TLV-TWA for the refrigerant used.
.6
The actual refrigerant sensor to have an average life expectancy of 5-6 years.
Sensor to be a replaceable plug in type. Red fault indicator LED’s to be provided
in the sensor box and Master panel to aid in trouble shooting.
.7
Chiller Manufacturer to provide all necessary interconnecting wiring diagrams for
installation purposed.
.8
Provide positive-pressure self-contained breathing apparatuses for entry and
egress to the MER, tested and certified by the National Institute of Occupational
Safety and Health (NIOSH) for immediate use to protect personnel against the
harmful effects of the refrigerant being used. Provide a minimum of one spare,
fully charged, ready-to-use refill for each self-contained breathing apparatus.
Provide equipment Manufacturer’s qualified personnel to ensure proper start-up,
including leak testing, evacuation, dehydration and charging, that condenser pressure
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 8
.38
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2.9
HEATING AND COOLING
controls are properly installed, to check out all operating and safety components as well
as instruct the Owner’s representative in safe and proper operation and maintenance.
Refer to schematic piping and control drawings and control specifications Section 15900
to ensure that all required components are provided to fulfil specified operation of
equipment, e.g. load reset from Building Automation System.
Submit a separate price included as part of the cost of the chiller installation to provide a
maintenance contract undertaken by the chiller Manufacturer for 100% labour,
refrigerant, and parts for a period of one year from the date of acceptance by the
University of Manitoba. This maintenance contract to be minimum recommended by the
Manufacturer to ensure keeping the machine in first class condition and maximum
operating efficiency on an on-going year to year basis, including monthly checks during
the operating season and cleaning of the condenser and evaporator tubes as required.
Warranty: The warranty period starts on the date of acceptance by the University of
Manitoba.
COMPUTER ROOM AIR CONDITIONING UNITS
.1
Floor Mounted Type: Complete package, factory assembled, wired, piped and tested as
follows:
.1
Cabinet: Manufactured of 1mm thick primed steel, self supporting, all welded
with removable panels where access is required – entire cabinet to be lined with
25mm (1”) thick thermal/acoustic non flammable dust and fibre free insulation.
.7
Finish: High temperature baked enamel in colour as selected by the Architect.
.8
Air Flow Arrangement: Downflow with screened top inlet – front supply or return
grilles not acceptable. Where shown and detailed on the drawings as up flow
arrangement, provide supply plenums, same dimensions as the units, factory
fabricated, and finished to match the base unit in every detail. Provide stainless
steel condensate trays under all cooling coils.
.9
Refrigeration System: Where multiple compressors are required, provide
independent refrigerant circuits.
.10
Coils: Copper tubes/aluminium fins.
.11
Refrigerant Circuits: All copper tubing with flare fittings complete with liquid line
filter/dryer, sight glass, expansion valve with external equalizer, solenoid valve
for pump down, liquid receivers and air cooled condenser.
.12
Compressors: Hermetic dynamically balanced complete with vibration isolators,
high/low pressure switches, motor overload protection, crankcase heater and
service valves.
.13
Reheat: 2 stage electric coil complete with over temperature and airflow failure
protection.
.14
Humidifier: Fully automatic, infra red with stainless steel evaporator pan or
packaged electrode steam boiler type with replaceable cylinders, steam and
condensate piping, water failure protection and automatic water control and drain
cycle.
.15
Filters: Disposable type conforming to 80% ASHRAE 52-76 test minimum with
50mm (2”) thick disposable prefilters rated at 30% efficiency to ASHRAE Test
Standard 52-76.
.16
Controls: [Remote wall mounted] [unit mounted] temperature and humidity
sensors connected to an all electronic microprocessor based control system
providing a ±0.50C control of space temperature and ±5% control of space
humidity with adjustable finite time interval between cooling and heating stages
and manual override switches for manual control of any or all functions and LCD
display of space temperature, humidity, time, date and status fans, compressors,
humidifier and liquid sensing system. All information to be stored for seven days
and be capable of being downloaded to a personal computer through a factory
installed RS232 port.
.17
Provide on the unit front, alternator switch for compressor lead-lag sequencing,
stop/start buttons with auto restart and pilot lights for power on, fans on, heating
mode, cooling mode, humidification, dehumidification, and low air flow
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 9
.18
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alarm. Provide a unit mounted disconnect switch with overheat and overcurrent
protection and all required contactors, relays, fuses, etc. for a complete fully
automatic system. Provide a unit mounted fire stat for automatic shut-down on
high return air temperature and a relay for unit shut-down on signal from fire
alarm system.
[Provide a portable temperature/humidity recorder utilizing a 7-day chart
complete with 100 charts, 2 pens and extra ink.]
Fans: Centrifugal statically and dynamically balanced and vibration isolated, dual
“B” belt driven with TEFC motors sized to 120% of specified performance
minimum, with adjustable sheaves and motor slide base.
Floor Stand: Provide floor stands of heliarc welded tubular steel frame with
vibration isolation pads. Stand to be 500mm high [with a factory built field
mounted turning vane].
Liquid Sensor System: For units and underfloor piping trench provide a total of
five (5) solid state sensors. Wire to Liqui-Tector panel [supplied with each air
conditioning unit] [supplied with air conditioning units for each] [zone] [computer
room] located in computer room, and provide a set of contacts for wiring to the
security system by Division 16.
Performance: Refer to equipment schedules. Refer to “Air Cooled Condensers”
in this section for further detail.
Warranty: Provide parts and labour 5 year extended warranty on compressors.
2.10
CONDENSATE RECEIVER
.1
Provide stainless steel receiver and integral duplex pumps complete with float switches,
integral wiring and alarm level float switch.
.2
Provide starter panel with alternator control and automatic switchover plus dual operation
on high-level indication.
.3
Starter shall have dry contact for high water level alarm signal to controls system.
.4
Pumps shall be readily removable for service without shutdown of unit.
.5
Pumps shall be wired to regular and emergency power.
.6
Provide drain and overflow piped to floor drain.
.7
Tank to have 12mm (½”) drain and valve to permit water sampling.
2.11
COOLING AND HEATING COILS
.1
Provide separate drain pans for each stacked cooling coil. Each pan shall be fully
draining.
.2
Access doors shall be provided on the upstream and downstream side of all coils.
.3
Cooling coil face velocities shall be designed for 425 fpm and shall not exceed 500 fpm.
.4
Water and glycol coils shall be fully drainable through line-sized drains. Vent connections
are not acceptable as drain fittings.
.5
Air vents shall be provided at all high points.
.6
Steam coils shall be piped to prevent freeze-ups and shall include vacuum breakers and
adequate drip leg-to-trap inlet.
.7
Water and glycol coils shall be piped in counterflow configuration.
.8
Water, glycol and DX Type: Provide cooling and heating coils as detailed on the coil
schedule, A.R.I. rated and constructed of 0.035” copper tubes and aluminum fins unless
otherwise noted, and pressure tested for operation up to 1400 kPa (200 psi) for water
and glycol coils. Refer to drawings for piping connections and dimensional data. Coils to
have threaded red brass connections.
.9
Reheat coils: Shall be constructed of aluminum fins and a minimum of 0.016” thickness
for 3/8” copper tubes, 0.020” thickness for 1/2” copper tubes, and 0.035” thickness for
5/8” and above tubing.
.10
For direct expansion coils, provide full face alternate tube circuiting and expansion valves
with external equalizers. Pressure test refrigerant coils to 2067 kPa (300 psi).
.11
Electric duct coils: performance characteristics and features as listed in the Coil
Schedule. Each coil to be completely prewired with:
.1
Air pressure differential switch.
February 27, 2015
University of Manitoba
HEATING AND COOLING
Req #
Section 15700
Page 10
.2
.3
.4
.5
.6
Fused control circuit and transformer.
Single or multistage type contactors as indicated.
Over temperature protection.
Prewired terminals for connection of power and control circuits.
Incaloy sheathed elements.
2.12
COOLING TOWER (INDUCED DRAFT VERTICAL DISCHARGE)
.1
Provide, as shown on the drawings, an induced draft, vertical discharge, packaged,
crossflow type cooling tower constructed of heavy mill steel with all steel parts bolts, etc.,
hot dipped galvanized to 764 g/m2 or stainless steel each with characteristics as follows:
.1
Distribution basin: Spray or open gravity type with ABS diffusing metering
orifices and flanged piping connections.
.2
Fan: Propeller type with cast aluminium or FRP blades [individually adjustable]
with ball bearings utilizing stainless steel balls, chrome steel races and extended
lubrication lines.
.3
Collection basin: Heavy steel construction, self cleaning with depressed centre
section, cleanout and drain fitting, side outlet with screen and anti-cavitation
device and electronic level sensor for actuation of remote fill valve.
.4
Fill:
Self-extinguishing 20 mil PVC with flame spread rating of 5 (to
ASTM-E84-81a).
.5
Access panels: Provided on both end walls, and a heavy galvanized wire grille
provided for the fan discharge opening.
.2
Also include:
.1
Ladder, of sufficient length to be within 300mm (12”) of roof level or grade, and
safety railing around the top of the cooling tower.
.2
Flow control valves
.3
Vibration isolation.
.4
External oil sight gauge
.5
Factory wired weatherproof control panel complete with unfused disconnects, fan
motor contactors, motor reversing switches, pan heater contactors [motor
winding over temperature relays] and numbered terminal strips for motor control
circuits for external connections to temperature control components. Provide
time delay on high to low speed fan sequence. [Ship panel separately for field
installation by the cooling tower vendor].
.6
2-speed single winding 900/1800 RPM weatherproof motor [with anti vibration
lock-out switch factory mounted and prewired to Control Panel]. [Reversible on
low speed.]
.7
Starter and control package.
.8
Winterization package to maintain 4.50C water at winter design ambient
consisting of a pan heater and controller with thermostat and low level switch
factory installed and wired to control panel.
.9
Provide six spare distribution nozzles.
.3
Characteristics and capacities: Refer to equipment schedules.
.4
Equipment as manufactured by [Baltimore Air Coil] EVAPCO] and [Marley] is acceptable.
2.13
COOLING TOWER (FORCED DRAFT VERTICAL DISCHARGE)
.1
Provide, as shown on the drawings and as described in the equipment schedules, a
forced draft, vertical discharge, packaged, counterflow type cooling tower with structural
elements and panels constructed of G-210 hot-dip heavy gauge galvanized steel. All
edges to have a protective coating of zinc-rich compound and all joints to have double
break flanges with caulking to make them watertight. All moving parts to be factory
mounted and aligned.
.2
Fan section to house fans and motor in dry entering air stream and to have hot dip
galvanized screen on inlet.
.3
Pan section to be provided with man-way circular doors, anti vortexing large area lift-out
strainer, water supply connection and electronic probe type level control factory wired to
February 27, 2015
University of Manitoba
HEATING AND COOLING
Req #
Section 15700
Page 11
.4
.5
.6
.7
.8
.9
.10
terminals located in a weather-proof junction box located externally on the side of the
unit.
Fans to be forward curve centrifugal, dynamically and statically balanced with inlet rings
on housings and discharge cowls extended into the pan sufficiently to prevent water
entry. Fan shaft to be protected by epoxy coating and be supported on heavy-duty selfaligning lubricatable bearings with cast iron housings.
Motor to be protected by an enclosure and mounted on an easily adjusted base. Refer to
Section 15050 for motor requirements. Fan drive to be multi-groove power band type
designed for not less than 150% of motor nameplate power output. Motor and
overtemperature protection leads to be factory connected to clearly marked terminals in a
weather proof junction box on the outside of the cooling tower casing.
Heat transfer casing sections to be removable. Wet deck surfaces to be serpentine
sheets of PVC impervious to rot, decay, fungus or biological attack and have a flame
spread rating of 5 per ASTM Standard E84-77a.
Water distribution to consist of header and spray branches of Schedule 40 PVC pipe with
large orifice plastic distribution nozzles. Branch piping and nozzles to be held in place by
snap-in rubber grommets to provide easy removal for servicing. Header to include
provisions for external spray pressure measurement.
Eliminators to be constructed of removable sections of specially formulated PVC and
configured to limit drift loss to less than 0.002% of total water circulated.
Also to be provided:
.1
Vibration isolation: refer to Section 15100.
.2
Six spare distribution nozzles.
.3
Winterization package to maintain 4.50C water at winter design consisting of a
pan heater and controller with thermostat, low level switch and weather proof
contactor factory wired, installed and tested with power terminals conveniently
located for field connection.
Performance: refer to equipment schedules.
2.14
DUPLEX BOILER FEED SYSTEM
.1
Provide one (1) Sterling model 4124-GDF duplex boiler feed unit.
.2
Each pump shall deliver 6 gpm at a discharge pressure of 20 psig.
.3
The unit shall be factory assembled and tested
.4
Pump motors, shall be 1/3 hp, 115/1/60, 3450 rpm, open drip proof.
2.15
ELECTRIC DUCT HEATERS
.1
Provide electric duct heaters with open wound nickel chromium coils supported to
minimize sag using ceramic bushings in 18 gauge galvanized steel frame.
.2
Heaters size to conform to ductwork but shall not result in air velocity less than 450 ft per
second nor a density higher than 30 watts per square inch.
.3
Duct line coils shall have integral control cabinet with hinged door to enclosure, required
terminal strips, lugs and control components.
.4
Provide primary and secondary contactors, manual and automatic reset, overheat
protection and transformers.
.5
Air unit coils shall be as constructed for ductline (reheat) application, except that control
contactors and devices will be provided as part of Section 15900 – Controls scope of
work in a separate unitized panel for wall or floor mounting.
.6
All power wiring shall be by Division 16000. Control interlock wiring shall be by Division
15900.
.7
Refer to drawings fro reheat coil heating output in Kilowatts. Coils up to 5 Kw to be single
stage, coils 5 Kw and over to be two stage.
.8
Pre-heat coil shall be single stage for SCR control with a total heating capacity of 25 kW
per hour.
2.16
ENTRANCE HEATERS (HOT WATER OR STEAM)
.1
Provide cabinet entrance heaters in the configuration as shown on the Drawings and as
detailed in the Equipment Schedules and as follows:
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 12
.1
.2
.3
.4
.1
.5
.2
Casing: 16 gauge cold rolled steel with electrostatically applied epoxy powder
coat prime finish. Casing shall incorporate a removable front panel and hinged
access door with Allen screw operated latch to provide access to motor speed
switch and for thermostat access. Recessed units shall be furnished with a
recessing frame.
Coil: Aluminium fins mechanically bonded to 13mm (½”) 0.035” copper tube with
galvanized steel casing and tested with air at 2065 kPa (300 psi).
Fans: Double width, double inlet, direct driven, forward curved centrifugal,
constructed of galvanized steel, balanced for vibration free operation with
galvanized steel housings designed for efficient air flow.
Motor: three speed, open type, resiliently mounted, with permanently lubricated
bearings, internal overload protection, and permanent split capacitor.
Switch: factory installed and wired three-speed type with “off” position.
Thermostat: internally mounted or remote. If shown as remote on drawings,
provide heavy-duty guard.
Filters: 13mm (½”) thick glass fibre disposable type in beverage board frames.
2.17
FAN COIL UNITS
.1
Provide fan coil units in style, arrangement and with characteristics as shown on the
drawings and as listed in the equipment schedules as follows:
.1
Fans: Galvanized steel centrifugal forward curved double width, statically and
dynamically balanced with galvanized steel housings.
.2
Motors: three speed tap-wound with integral motor protection; permanent split
capacitor with sleeve bearings with oil tubes.
.3
Motor Control: Unit mounted three-speed switch with “Off” position wired to low
speed so that fan cannot be shut off from speed switch.
.4
Coils: Copper tube/aluminium fin mechanically bonded, 1725 kPa (250 psi)
working pressure, with manual air vent.
.5
Provide flexible piping connections to fan coil. Units to be Flex Tech Industries
Model #MFN3/4, 12” long and rated for 950 psi at 70°F.
.6
Filters: 25mm (1”) thick disposable media in permanent metal frame.
.7
Cabinet: 18 ga. Cold rolled steel, primed and finished in baked enamel and
where applicable, with stamped discharge grille, hinged top access doors (both
sides) and one piece front access panel with slotted head quarter-turn positive
locking fasteners; cabinet completely lined with 12mm (2”) thick closed cell foam
acoustic insulation.
.8
Drain Pans: 18 ga. Galvanized steel, lined with 12 mm (2”) thick closed cell foam
insulation; pitched to 25mm (1”) copper drain and projecting beyond coil under
headers and return bends. Where applicable (vertical units), auxiliary drain pans
to be provided of identical construction.
2.18
FINNED TUBE RADIATION AND ENCLOSURE
.1
A commercial-grade 16-gauge face enclosure shall be used. Residential-grade enclosure
is not permitted. The finish shall be submitted to the University Project Manager with a
colour chip for approval.
.2
Finned-tube radiation shall be designed for an average hot water temperature of 180 °F
or 1 psig steam supply, to be reset with the outside air temperature.
.3
Finned-tube radiation shall be selected to be consistent with the existing perimeter
radiation type where installed as part of a renovation/expansion project.
.4
Provide where noted and detailed on drawings and in accordance with plan schedules,
finned tube convectors with enclosures, continuous wall to wall where indicated.
.5
Elements: [32mm (1 1/4”)] [20mm (3/4”)] [steel] [copper] tubing complete with 100mm
x 100mm (4” x 4”) stamped pattern [steel] [aluminium] fins, with integral fin collars to
provide even spacing of fins bonded to tubes by mechanical expansion of tube and
supported at 1200mm (48”) centres maximum with adjustable cradle type hangers.
Performance based on 180ºF [82ºC] entering water temperature, with 20ºF [11ºC]
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 13
.6
.7
temperature drop, forced circulation at 0.30 m/s (1 ft./s) minimum flow rate and entering
air temperature corrected to 70ºF [21ºC].
Enclosures: Wall hung or free standing as scheduled having integral free flow outlet
louvre and horizontal bottom inlet fabricated from 16 gauge minimum steel prime coated,
[primed and painted in colour as selected by the Consultant] run continuous wall to
wall where indicated complete with all necessary end brackets, end panels, corners,
fillers, [removable modular sections,] job measured. Joints [at mullions] to be fitted to
appear butted with adjoining section offset to slide under. Enclosure support: by
continuous hanging strip or brackets spaced 1200mm (48”) o.c maximum.
All individual radiation sections shall be provided with control valves and thermostat
control.
2.19
FLUID COOLER (DRY TYPE)
.1
Provide air cooled Dry Type Fluid Cooler consisting of fans, controls and coils, with
supporting casing with stand, and vibration spring isolators. Coils: aluminium plate fins
on mechanically expanded copper tubes, as specified in 15700]. Fans: Direct or belt
drive, propeller type protected by guards. All motors: pre-lubricated, with built-in
overload protection. Refer also to Section 15050.
.2
Fan shafts: Corrosion protected. Fan blades: Iridite or aluminium finish. Magnetic
contactors: mounted and factory wired to power and control numbered terminals.
.3
Relays, contactors and controls: mounted and factory wired to provide interlock with
Building Automation System. All fans to cycle in sequence to maintain fluid temperature
over a10°C range between minimum and maximum.
.4
Casing: Weather Armour baked enamel finish or totally galvanized. Provide access
panels for electrical connections.
.5
Capacities and characteristics: As shown in the equipment schedules.
.6
Acceptable Manufacturers: Keeprite, Bohn.
2.20
FLUID COOLER (WET TYPE)
.1
Provide, as shown on the drawings and as described in the equipment schedules, a
forced draft, vertical discharge, packaged, counterflow type fluid cooler with structural
elements and panels constructed of G-210 hot-dip heavy gauge galvanized steel. All
edges to have a protective coating of zinc-rich compound and all joints to have double
break flanges with caulking to make them watertight. All moving parts to be factory
mounted and aligned. All components to be easily accessible through access panels.
.2
Fan section to house fans and motor in dry entering air stream and to have hot dip
galvanized screen on inlet.
.3
Pan section to be provided with man-way circular doors, anti vortexing large area lift-out
strainer, water supply connection, waste water bleed line and electronic probe type level
control factory wired to terminals located in a weather-proof junction box located
externally on the side of the unit.
.4
Fans to be forward curve centrifugal, dynamically and statically balanced with inlet rings
on housings and discharge cowls extended into the pan sufficiently to prevent water
entry. Fan shaft to be protected by epoxy coating and be supported on heavy-duty selfaligning lubricatable bearings with cast iron housings.
.5
Fans to be vane-axial type constructed of cast aluminium alloy blades arranged in a twostage system and installed in a close fitted cowl with venturi air inlet and air stabilising
vanes. Fans and sheaves to be mounted on a corrosion protected shaft with heavy-duty
self-aligning ball type bearings fitted with extended grease fittings located on the exterior
of the casing.
.6
Motor to be protected by an enclosure and mounted on an easily adjusted base. Refer to
Section 15050 for motor requirements. Fan drive to be multi-groove power band type
designed for not less than 150% of motor nameplate power output. Motor and
overtemperature protection leads to be factory connected to clearly marked terminals in a
weather proof junction box on the outside of the fluid cooler casing. Drives to be factory
mounted and aligned.
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 14
.7
.8
.9
.10
.11
.12
.13
2.21
HEATING AND COOLING
Heat transfer casing sections to be removable. Wet deck surfaces to be serpentine
sheets of PVC impervious to rot, decay, fungus or biological attack and have a flame
spread rating of 5 per ASTM Standard E84-77a.
Water distribution to consist of header and spray branches of Schedule 40 PVC pipe with
removable ABS spray nozzles. Branch piping and nozzles to be held in place to provide
easy removal for servicing. Header to include provisions for external spray pressure
measurement.
Eliminators to be constructed of removable sections of specially formulated PVC and
configured to limit drift loss to less than 0.002% of total water circulated.
Heat transfer coils: Primed surface steel encased in steel framework with entire
assembly hot dipped galvanized after fabrication. Coils to be designed with sloping tubes
for free drainage of liquid and leakage tested to 2410 kPa (350 psig).
Water circulating pumps: close coupled centrifugal type with mechanical seals, installed
vertically at the factory to allow free draining on shut down. Refer to Equipment
schedules for motor power requirements.
Also to be provided: [Spec. note: options as required to suit the project]
.1
Six spare distribution nozzles.
.2
Winterization package to maintain 4.50C water at winter design consisting of a
pan heater and controller with thermostat, low level switch and weather proof
contactor factory wired, installed and tested with power terminals conveniently
located for field connection.
.3
Ladders, [safety cage and perimeter handrail]
.4
Factory wired weatherproof control panel complete with unfused disconnects, fan
and pump motor contactors, pan heater contactors [motor winding over
temperature relays] and numbered terminal strips for motor control circuits for
external connections to temperature control components. [Provide time delay on
high to low speed fan sequence.] [Ship panel separately for field installation by
the cooling tower vendor].
.5
Discharge hood with positive closure damper.
.6
Noise attenuation.
.7
Bottom screens.
Performance: refer to equipment schedules.
FORCED DRAFT BOILERS
.1
Provide [No. 2 oil] natural gas fired forced draft [water tube] [sectional cast iron] type hot
water [steam] boiler[s] with capacities and characteristics as indicated and with features
and components as follows:
.1
Constructed in accordance with the ASME Code and CSA and CGA
requirements and a copy of the inspection report attesting to same provided.
.2
Each a complete unit, factory tested, including burner, controls, etc., and be
suitable for mounting on a simple foundation and ready for attachment of water,
fuel and electrical connections.
.3
Each burner unit complete with forced draft fan, centrifugal type dynamically and
statically balanced, pre-piped gas train, automatically controlled fuel valves and
combustion air damper, and a prewired conveniently mounted control panel.
.4
Maximum operating water temperature: ( ) °C ( ) °F maximum system
operating pressure: ( ) kPa ( psi).
.5
Each boiler gross output: ( ) Kw (BTU per hour) when fired at the rate of ( )
Kw (BTU per hour) input.
.6
Constructed in accordance with the A.S.M.E. Code and C.S.A. requirements and
a copy of the inspection report attesting to same provided.
.7
Each a complete unit, factory tested, including burner, controls, etc., and be
suitable for mounting on a simple foundation and ready for attachment of water,
fuel and electrical connections.
.8
Each burner unit complete with forced draft fan, centrifugal type dynamically and
statically balanced, pre-piped gas train, automatically controlled fuel valves and
combustion air damper, and a prewired conveniently mounted control panel.
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 15
.9
.10
.11
.12
.13
.14
.15
.16
.17
.18
.19
.20
.21
.22
.23
.24
2.22
HEATING AND COOLING
Control panel with programming relay, fan motor starter and control switches,
"manual-automatic" switch to permit continuous firing on low or high fire rate, and
burner shut-down on ignition, pilot, or main flame failure.
2 year, 100% warranty.
Control for
[Prepurge-high-off]
[Prepurge-low-high-off]
[Prepurge-low-high-postpurge-off]
[Prepurge-low-high-low-off]
[Prepurge-low-high-low-postpurge-off]
[Prepurge-low-3 to 1 turndown modulation-low-postpurge-off]
[Prepurge-low-3 to 1 turndown modulation-low-postpurge- firing principal] [With
ignition on low fire].
[Also provide indoor/outdoor reset and sequencing control circ. Pump interlock.]
Control panel with programming relay, fan motor starter and control switches
[switch to permit continuous firing on low fire] [terminals for Building
Automation System enable and disable boiler operation] and burner
shut-down on ignition or main flame failure.
Lifting lugs
Observation ports on each end for flame condition inspection.
65mm (22”) thick fibreglass insulation protected by 16 gauge enamelled
preformed sheetmetal outer jacket factory painted.
To avoid condensation, provision of a 65mm (22”) thick high temperature vapoursealed insulating board in steel framework separating fire side from outer
insulated jacket or fire side separated from outer insulated jacket by sealed water
vessel sections.
Combination temperature pressure gauge.
Operating and high limit temperature controls.
Pressure relief valves set at [ ] kPa (
psi) sized to comply with code
requirements.
Low water cut-off with drain.
Framed certificate issued by Provincial Government Authority having jurisdiction.
Manual reset elapsed time meter on burners.
Vibration isolation pads. Refer to Section 15100.
Field start-up and report by Manufacturer’s authorized service personnel.
FRESH AIR MAKE-UP UNITS, GAS FIRED, DIRECT EXPANSION COOLING
.1
Provide rooftop heating (natural gas), electric cooling and ventilating unit in size and with
characteristics as detailed in the equipment schedules as manufactured by Engineered
Air.
.2
A complete package, factory tested and operable after completion of wiring, ductwork
and natural gas connections.
.3
Casing:
.1
18 gauge galvanized steel, degreased and primed with a two part acid based
etching primer and all exposed metal parts finished with electrostatically applied
enamel.
.2
Sides, top and floor panels to have two breaks per joint and secured with
sheetmetal screws or pop rivets. Sides and floor joints to be broken inward. All
joints to be caulked. Entire casing to be supported on formed galvanized steel
channels or structural channel supports, designed and welded for minimum
deflection. Outer wall panels to extend 6 mm below floor panel.
.3
Internal insulation: 50 mm thick rigid 24 kg/m5 density neoprene coated fibre
glass board secured with pins at 400 mm o/c. and fire retardant adhesive. Drain
pans and floor to be insulated on the underside. All insulation joints and butt
ends to be protected by sheetmetal channels. Insulation to be covered with
galvanized steel liner in the heating section.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 16
.4
.4
.5
.6
.7
.8
.9
Access panels: 450 mm wide minimum by full height of unit casing (less
thickness of framing), insulated (sheetmetal lined) with zinc plated piano hinges
with brass pins, Ventlock 310 handles (openable from both sides) for the
following:
.1
Fans and motors
.2
Filters
.3
Dampers and actuators
.4
Access plenums
.5
Refrigeration equipment and controls
.6
Heating section
.5
Drain pans: integral with floor panel, 50 mm deep, welded corners asphaltic
water proofing coated, extended 150 mm downstream of coil face and with 25
mm (1”) drain connection.
.6
Outdoor air intake: hooded with 25 mm (1”) galvanized screens.
Roof mounting curb: full perimeter, constructed of heavy gauge sheetmetal, 350 mm
(14”) high with wood nailer, neoprene sealing strip and all welded “Z” bar with 25 mm (1”)
upturn on inner perimeter. External insulation of curb to be provided by Section 07555.
Fans: rated to AMCA Standard Test Code, Bulletin 210, factory dynamically balanced at
20% minimum below first critical RPM.
.1
Forward curved fans 450 mm (18”) and less to have permanently lubricated
cartridge ball bearings supported by 3 point bearing bracket. Larger fans to have
greaseable pillow block bearings supported on structural steel frame.
.2
Airfoil fans: bearings to be greaseable self-aligning ball or roller pillow block
type.
.3
Ratio of blast to nominal outlet areas:
.1
Forward curved
60%+
.2
Airfoil
75%+
.4
Drives: adjustable for motors 3.73 kW (5hp) or smaller. Fixed on larger motors.
.5
Fan/motor assemblies: equipped with vibration isolators; neoprene-in-shear for
230 to 330 mm forward curved fans. Larger fans to have spring type isolators
with levelling bolts.
Natural gas heating section:
.1
CGA approved indirect fired titanium stainless steel primary drum and
multi-tube secondary floating stress relieved design assembly heat
exchanger with turbulators and condensate drain and complete gas train
with all required pressure regulating and relief valves and shut-off valve.
.2
Burner: blow-through positive pressure type with intermittent pilot
ignition with solid state programmed flame relay, 10:1 turn-down ratio at
80% efficiency over entire range. Natural gas supply at 1750 Pa (7”)
w.c. and approved for operation at –400C. All required venting to be to
current CGA Standards. Maximum flue gas concentrations not to
exceed 5 ppm CO and 30 ppm NOx at fresh air conditions equivalent to
11.6% CO2 in combustion exhaust as prescribed by the Canadian
Council of Ministers of the Environment, Initiative N306.
Filters: to be as specified in 15800.
Damper: refer to 15900 for damper requirements.
Refrigeration:
.1
Coils: for cooling and condenser service; copper tubes and headers, aluminium
fins and galvanized steel casing, factory tested with air at 2070 kPa (300 psig),
A.R.I. rated. Direct expansion coils to be alternate tube circuited to provide “full
face” coverage. All coils to be field removable.
.2
Compressors: hermetic, 3600 RPM on resilient mounts with overload protection,
internal pressure relief and crankcase heaters.
.3
Condenser fans: direct driven propeller type with weather resistant TEAC 6 pole
motors suitable for vertical mounting.
.4
Components: all refrigeration circuits to be complete with liquid line filter-driers,
combination sight glass/moisture indicators and service ports fit with schraeder
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 17
.11
.12
.13
2.23
HEATING AND COOLING
fittings, load compensated thermal expansion valves with external equalizers,
80C liquid sub-cooling, suction line filters and liquid line manual shut-off valves.
The complete system, after assembly, to be pressure tested with dry nitrogen
and re-tested under vacuum. Each system to be factory run and adjusted prior to
delivery.
Basic operating controls:
.1
Motor contactors for all fans and compressors, overload protection, control circuit
transformers, terminal blocks, grounding lugs, auxiliary contactors, terminals for
connection of external devices, cooling relay, ambient compressor lockout, high
pressure and automatic reset low pressure controls, head pressure actuated fan
cycling, five minute anti-cycle timers, inter-stage time delay timers, hot gas
bypass on lead compressor and single phase protection. Heating section to be
provided with an automatic reset high temperature cutout and combustion airflow
proving switch. All operating controls to be enclosed in a panel to CSA
requirements.
Wiring, testing and certification: the unit to be equipped with CSA listed components,
CGA certified and totally wired to requirements of the Canadian Electrical Code, Part 1,
and pertinent sections of Part 2 relative to specific equipment type and purpose. All
electrical circuitry to undergo dielectric strength tests to CSA C22.2-0.
Temperature controls: Factory installed and tested application specific controller to
provide the following sequences:
.1
Start/stop: A normally closed outdoor air damper to open on system start-up,
and when fully open, interlocks initiate cooling or heating operation depending on
outdoor temperature conditions. Damper to return to closed position on power or
system failure or on scheduled or manual shutdown.
.2
Cooling: 2 stages of cooling control and hot gas by-pass to maintain discharge
temperature. The minimum run and off time for compressors to be 4 minutes at
full load start-up, and may range up to 8 minutes under part load conditions. PI
(proportional/integral) control scheme to reduce temperature droop by resetting
to the set point after each stage is cycled on and to include:
.1
Modulating discharge air control with built-in modulating high and low
limit.
.2
After stage 1 cooling is energized and there is still a cooling demand,
additional stages are energized until 100% cooling is energized.
.3
Heating: Discharge air control to modulate natural gas valve and
proportion combustion air by varying combustion air fan motor speed to
provide optimum fuel/air mixture and efficiency at all conditions.
Discharge air low limit with automatic by-pass time delay to allow for cold
start-up. On a heating system failure, the low limit to stop the fan and
close the outdoor air damper. Manual reset required to restart system.
Provide terminals for connection to remote CCMS panel to provide remote indication of
supply air temperature, filter status, system on/off status, cooling on/off status and
heating on/off status and alarm signal for low limit failure. Also provide connections for
future EMCS capability for system on-off control and supply air temperature adjustment.
Provide all required wiring diagrams to provide a working interface with the future EMCS
for all system status points as well as control.
GAS FIRED INFRA RED HEATERS
.1
Provide model DX natural gas fired low intensity ceiling mounted infrared heaters in
locations and with capacities as shown on the Drawings as manufactured by Re-VerberRay. Equipment meeting standards of manufacture and performance as produced by
Space-Ray will also be accepted.
.2
Heaters to have features as follows:
1.
16 gauge titanium alloy heat exchanger tubes coated with high emissivity
1200F corrosion resistant black coating.
2.
Radiant tubes to 16-gauge aluminized steel coated with high emissivity 1200F
corrosion resistant black coating.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 18
3.
4.
5.
6.
7.
8.
9.
10.
11.
Heat exchanger coupling system: tube connections to be “slip” fit coupling
system complete with four inch band clamp and continuous 16 gauge wall
thickness.
100% safety shut-off gas control.
Airflow control consisting of dual differential air proving switches to continuously
monitor burner operation.
Ignition system with 45-second pre-purge control.
Turbulator baffles and adjustable polished aluminium parabolic reflectors with
end caps adjustable from 0 to 450.
Integrated hanging system of galvanized wire hangers complete with reflector
tension spring.
Outdoor air combustion collar with combustion air and heater controls.
CGA certified venting for vertical or horizontal discharge or for common venting.
Warranty: extended 4 year warranty on combustion chamber and radiant tubes.
2.24
GLYCOL FEED SYSTEM
DESIGN NOTE: GLYCOL SYSTEM DRAINS NEED TO BE COLLECTED AND RETURNED TO THE
GLYCOL FEED SYSTEM. WHERE THERE ARE FLOOR DRAINS INVOLVED,
REVIEW POTENTIAL OF GATHERING DRAINS AND RETURNING GLYCOL TO
FEEDER. ENSURE THAT ANY SPILLS WILL NOT RUN INTO WEEPING TILE
SYSTEM AND BE PUMPED OUTDOORS.
.1
Glycol systems shall be equipped with a mix-and-fill tank with manual fill capabilities,
hose bib from domestic water for tank filling, and tank level alarm. Direct-connect city
makeup lines to glycol systems are NOT permitted.
.2
The entire system to be factory pre-piped and pre-wired with numbered terminal strip for
wiring of remote items such as the pressure switch and the contact head meter.
.3
The piping system shall be provided with a low-pressure sensor, which shall alarm on the
DDC system. On alarm generation, feed system will be manually started after checking
for system leaks. This manual operation will avoid feed system from automatically filling
and compensating for a system leak. Fully automatic operation can be selected by HOA
switch if suitable for system.
.4
Unit to be complete with low-level pump cutout float switch, which plugs directly into
standard duplex outlet and stops the pump if glycol level is too low.
.5
Unit to be complete with low-level remote monitoring panel complete with dry contacts
and be connected to DDC system alarm.
.6
Refer to Section 15900 for control requirements.
(Baby System)
.1
Provide an Axiom Model MF200 packaged glycol feed system consisting of a 23 litre (6.0
US gal.) polyethylene tank; pump suction hose with inlet strainer; pressure pump with
fuse protection; integral pressure switch; cord and plug; manual diverter valve for purging
air and agitating contents of storage tank; adjustable 55 - 125 kPa (8 - 18 psi) pressure
regulating valve with pressure gauge; fast fill lever; integral replaceable strainer; System
shall be compatible with glycol solutions. Pump shall be capable of running dry without
damage. Power supply: 3-prong plug and cord, 115v/60/1, 0.5 amp. Unit shall be
completely assembled and be provided with field mounting kit including wall brackets,
nylon fittings and 20 feet of nylon connecting tubing.]
(50 Gallon System)
.1
Provide an Axiom Model SF100 packaged glycol feed system consisting of a 180 litre (48
US gal.) polyethylene tank; pump suction hose with inlet strainer; pressure pump with
thermal cut-out; integral pressure switch; cord and plug; pre-charged accumulator tank
with EPDM diaphragm; manual diverter valve for purging air and agitating contents of
storage tank; adjustable 35-380 kPa (5-55 psi) pressure regulating valve with pressure
gauge; fast fill lever; integral replaceable strainer; built-in check valve; built-in supply
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 19
shut-off valve; union connection; 12 mm (1/2”) x 900 mm (36”) long flexible connection
hose with check valve. System shall be compatible with glycol solutions. Pump shall be
capable of running dry without damage. Power supply: 3-prong plug and cord, 115v/60/1,
0.7 amp. Unit shall be completely assembled.]
(100 Gallon System )
.1
Provide an Axiom Model SF100-L packaged glycol feed system consisting of a 383 litre
(100 US gal.) polyethylene tank; pump suction hose with inlet strainer; pressure pump
with thermal cut-out; integral pressure switch; cord and plug; pre-charged accumulator
tank with EPDM diaphragm; manual diverter valve for purging air and agitating contents
of storage tank; adjustable 35-380 kPa (5-55 psi) pressure regulating valve with pressure
gauge; fast fill lever; integral replaceable strainer; built-in check valve; built-in supply
shut-off valve; union connection; 12 mm (1/2”) x 900 mm (36”) long flexible connection
hose with check valve. System shall be compatible with glycol solutions. Pump shall be
capable of running dry without damage. Power supply: 3-prong plug and cord, 115v/60/1,
0.7 amp. Unit shall be completely assembled.]
2.25
GLYCOL SYSTEMS
.1
Where indicated on the drawings and as required by the specification, provide piping
arrangements complete with all fill points, expansion tanks, and equipment.
.2
Provide premixed inhibited propylene glycol solution using distilled water and Dow
Chemical DOWFROST inhibited with Corrshield NT4102 (or equal approved by the
University of Manitoba) to achieve a -43°C (-45°F) freeeze point. All glycol solutions are
also to be acceptable to Authorities having Jurisdiction regarding environmental
acceptability. NOTE: no ethylene glycol product is to be used.
.3
Where connecting to an existing system, new and existing systems to be completely
cleaned, flushed, and filled with approved glycol solution.
.4
In addition to filling the system to meet the above requirements also provide one full 170 l
(45 gal.) barrel of premixed polyethylene glycol solution and a rotary drum pump
complete with 3600mm (12 feet) of 25mm (1”) rubber hose for future servicing. Hose and
piping system to be provided with suitable connections to permit introduction of glycol
solution with rotary pump.
.5
Provide a chemical analysis performed by glycol Manufacturer on final installed operating
solution. Test to be conducted after 72 hours of operation and results must be forwarded
to the Project Coordinator for written approval.
.6
Each system receiving glycol solution is to be provided with a pot feeder and in-line filter
as specified in Section 15200.
2.26
HEAT EXCHANGER – PLATE TYPE
.1
Provide a plate type heat exchanger as manufactured by ALFA-LAVAL, model No. (
),
with a capacity to cool ( ) l/s ( usgpm) water from ( )°C to ( )°C with a pressure drop
of ( )kPa ( ft.) when supplied in the opposite circuit with ( ) l/s ( us gpm) water
entering at ( ) °C with a pressure drop of ( ) kPa ( ft.).
.2
Plate and frame construction capable of operating up to 690 kPa (100 psi) and a
maximum temperature of ( )°C ( °F) .
.3
Frame: Painted carbon steel, with chrome plated carbon steel guide bars, and zinc
plated carbon steel tie bolts. All pipe connection points to have flanged fittings.
.4
Plates: 304 stainless steel with Nitrile gaskets.
.1
Install level and firmly anchored to supports.
.2
Arrange piping so that tube bundles can be removed after disconnecting flanges adjacent
to head and without disturbing other equipment and systems.
1.
Arrange layout of equipment so that clearances are maintained for maintenance
and safety.
2.
Provide safety relief valves and drain valves and or other appurtenances piped to
drain.
3.
Provide wells, thermometers and pressure gauges on each inlet and each outlet.
February 27, 2015
University of Manitoba
HEATING AND COOLING
Req #
2.27
Page 20
HEAT EXCHANGER – SHELL AND TUBE TYPE
.1
.2
.3
.4
.5
.6
.7
.8
.9
.10
.11
.12
2.28
Section 15700
Provide removable U-Tube type heat exchangers of the sizes and capacities noted on
the schedule.
Heat exchangers shall consist of ¾” OD 20 gauge tubes secured to a tubesheet via rolled
joints, cast iron head of either two or four pass configuration, steel shell, tubesheet, and
supports. Shell and tubes shall be designed for a minimum of 860 kPa (125 psi) working
pressure at 375F.
Sufficient clear space (no less than the entire length of the converter) shall be provided to
allow for tube bundle removal.
Vacuum breakers shall be installed in the piping for modulating steam supply. There shall
be a minimum 300mm (12”) drip leg to trap inlet. Vacuum breakers shall be provided on
the shell.
Converters shall be selected at 0.0005 fouling factor.
Provide wells, thermometers, and pressure gauges on each inlet and each outlet.
All pipe connection points to have flanged fittings.
Operating and capacity characteristics:
Shell Side
Tube Side
(Return) water ( )
(Boiler) water
l/s ( usgpm) from
( ) l/s ( usgpm)
( )°C to ( )°C:
from ( )°C to
( ) kPa ( ) ft.
( )°C: ( )
pressure drop.
kPa ( ft.) pressure drop.
Heat exchangers with head connections of 2.5” or greater shall have 150# flanged
connection and shall be constructed of a cast iron or fabricated steel head in a K-style
configuration to allow adequate clearance for tube bundle removal without disruption or
dismantling of additional piping beyond the head flanges. For units with head connections
of 2” or less, NPT connection are acceptable and the contractor is responsible to ensure
piping allows proper clearance for tube bundle to be removed in similar fashion to a Kstyle head.
Heat exchanger shall be constructed of a steel shell, and steel baffles, tie rods, and
spacers. Unit shall have a spiral wound, expanded Teflon, or grafoil gasket to seal the
shell at the tubesheet.
Heat exchanger design shall allow for a maximum tubeside velocity no greater than 7.5
feet/ second and a shell side velocity no greater than 4.0 feet/second. Unit shall be
constructed with a fouling factor equal to or greater than that scheduled.
Unit shall be constructed in accordance with ASME Code Rules and shall have a
manufacturer’s data report for pressure vessels, form No. U-1. Form U-1 shall be
furnished to the Owner. An authorized inspector, holding a National Board commission,
certifying that construction conforms to the latest ASME Code for pressure vessels must
sign this form. The ASME "U" symbol shall also be stamped on each heat exchanger. In
addition, each unit registered with the National Board of Boiler and Pressure Vessel
Inspectors.
HIGH EFFICIENCY CONDENSING BOILERS
.1
Provide natural gas fired high efficiency condensing boilers as manufactured by AERCO
with capacities and characteristics as indicated in the equipment schedules.
.2
Construction: in accordance with the A.S.M.E. Code and C.S.A. requirements and a
copy of the inspection report attesting to same provided.
.3
Each a complete unit, factory tested, including burner and controls and be suitable for
mounting on a simple foundation and ready for attachment of water, fuel, vent/intake and
electrical connections.
.4
Each unit complete with insulated steel jacket, steel base, control module, blower
assembly, gas/air orifice plate and manifold assembly, stainless steel burner, complete
gas train including shut-off valve, hot surface ignition system, air pressure switch, primary
circulating pump, mixing valve, condensate drain, vent termination kit with stainless steel
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 21
.5
.6
2.29
HEATING AND COOLING
vent piping and PVC intake piping in configuration as shown on the Drawings, 40 VA
transformer and junction box, built-in air eliminator, 30 PSI ASME relief valve, water
temperature limit switch, combination pressure/temperature gauge, low water cut-off and
drain valve.
Field start-up and report by Manufacturer’s authorized service personnel.
Refer to Section 15800 for exhaust vent and air intake requirements.
HUMIDIFIERS (PACKAGED CLEANABLE ELECTRIC)
.1
Provide as listed in the equipment schedules and shown on the drawings, floor mounted
electric evaporative stainless steel cleanable type packaged humidifiers bearing the
ETLC approval label.
.2
The factory insulated vaporizing chamber, cover and fittings shall be constructed of 14
gauge stainless steel with heli-arc welded seam, construction. The vaporizing chamber
cover and front clean out plate shall be easily removable for inspection and servicing.
.3
The NEMA1 control cabinet shall be factory mounted & wired on the evaporating
chamber with all wiring between cabinet and humidifier completed at the factory.
.4
The immersion heaters shall be low watt density, incoloy-alloy sheathed, resistance type,
designed to provide constant expansion and contraction, to shed scale.
.5
A temperature sensor, mounted on the evaporating chamber shall provide overtemperature protection, freeze protection and pre-heat for response to load demand limit
switch shall be provided, mounted and wired.
.6
An electric drain valve shall be mounted on the assembly.
.7
The modulating control shall be time-proportioning and accept a demand signal of 4mA to
20mA, 0 ohm to 135 ohm, 2 VDC to 10 VDC.
.8
Operating and limit controls, provided by DRI-STEEM and shipped loose for mounting
and wiring by the installer, shall include:
.1
Humidity transmitter, suitable either for wall or return air duct mounting.
.2
On-off high limit humidistat.
.3
Sail type or pneumatic air flow proving switch as recommended by manufacturer.
.9
The unit shall be furnished with a DRI-STEEM, VAPOR LOGIC 3 microprocessor control.
The control shall be capable of accepting a signal directly from the building automated
control system and will, through a real time clock, electronically track time and control all
fill, drain and flush functions. The VAPOR LOGIC 3 will provide tank freeze protection
and reheating for rapid response to load demand. The control will provide messaging for
alarm log, graphed data and message reminder for tank maintenance based on water
usage.
.10
A backlit display control panel keypad, suitable for remote mounting, shall serve as
interface to the controller to monitor and / or control the control functions. The keypad
will display current conditions, alarm log, graphed data and message reminder for tank
cleaning, based on water usage.
.11
Water level shall be controlled electronically using a three rod probe assembly to respond
with fill valve open and close and low water cut off signals as the water level reaches
each rod.
.12
The RAPID SORB, or ULTRA SORB 304 stainless steel steam dispersion assemblies,
shall be single header, vertical tube design suitable for mounting in the ductwork or air
handler unit cabinets. The dispersion tubes shall be fitted with closely spaced, thermal
resin, calibrated orifice tubelets, to provide close absorption performance.
.13
To minimize heat gain and system condensate losses the dispersion tubes shall be
provided with factory installed PVDF insulation.
.14
The unit/s shall be DRI-STEEM model VLC as listed in the schedule, having capacities
and ratings as per the schedule. Capacities shown include an allowance for steam
dispersion assembly and distribution condensate losses, based on a developed length of
_____ feet of insulated inter-connecting hard piping.
.15
Units shall have the following features:
.1
ULC and CSA listed and approved.
.2
Immersion heaters: Incoloy alloy sheathed resistance type heaters configured for
convenient removal for inspection.
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 22
.3
.4
.5
.6
.7
.8
.9
.10
2.30
HEATING AND COOLING
Electronic water level control for automatic refill, low water cut-off, and skimmer
blow-down functions.
Field adjustable skimmer for mineral removal.
Factory mounted and wired control cabinet and subpanel to contain controls,
transformers and contactors.
Automatic drain valve and control, field adjustable from 5 to 50 hours of “on” time
and one to 30 minutes of drain time.
High limit duct humidistat.
Air flow proving switch.
Factory applied 20mm (¾”) thick rigid foam insulation covered with reinforced
aluminium foil on all surfaces except panel.
Support legs.
HUMIDIFIERS (STEAM TO STEAM)
.1
Humidification systems shall be steam-to-steam type utilizing building steam supply to
generate clean steam for humidification purposes
.2
Humidifier shall utilize primary steam, supplied at ____ psig, to create secondary steam
for humidification through the use of a heat exchanger.
.3
The heat exchanger shall be tubular, designed to shed mineral build up through thermal
expansion. The tubes shall be nickel coated copper or Teflon coated stainless steel.
.4
The evaporator shall be 14 gauge, heli-arc welded seam, stainless steel construction. A
side cleanout will be provided to allow complete access to the heat exchanger and the
floor of the evaporator, without necessitating the removal of the heat exchanger. The top
cover of the evaporator shall be removable for tank internal access without disconnection
of seam dispersion piping, from the steam outlet. The heat exchanger assembly shall be
accessible and, if required, removable, through the top opening of the evaporator.
.5
The evaporator tank shall be supplied with factory installed rigid fiberglass insulation,
covered with reinforced aluminum foil.
.6
An (electrically or pneumatically) actuated modulating steam valve shall be provided for
mounting on the inlet to the heat exchanger. The control valve shall be Baumann 24000
bronze with 316 stainless steel trim, rated for 205°C (400°F) at 250 psig. A float and
thermostatic steam trap shall be furnished for the heat exchanger discharge.
.7
Water level of potable or softened water shall be electronically controlled using a 3 rod
probe system. Water lever for DI/RO units shall be controlled using a float valve.
.8
The NEMA 4 control cabinet shall be factory mounted and wired on the evaporator
assembly and contain:
.1
A Vapor Logic 4, microprocessor control which shall be capable of accepting a
signal directly from a humidity transmitter or from a building automated control
system and will through a real time clock, electronically, track time and control all
fill, drain and flush functions.
.2
The Vapor Logic 4 controller will provide tank freeze protection and preheating
for rapid response to load demand. The control will provide messaging for alarm
log, graphed data and message reminder for tank maintenance based on water
usage. Backlit display control panel keypad, suitable for remote mounting, shall
serve as interface to the controller to monitor and / or control the control
functions.
.3
The VAPOR LOGIC 4 will be fully interoperable with Modbus, BACnet, or
LonTalk systems.
.4
A humidifier control interface suitable for connection to a (BACnet) system shall
be provided.
.9
Water level for potable or softened water systems shall be controlled electronically using
a three rod probe assembly to respond with fill valve open and close and low water cut off
signals as the water level reaches each rod. Water level for DI/RO units shall be
controlled using a float valve.
.10
The STS evaporator shall be suitable for (floor, trapeze, or wall), mounting.
.11
The 304 stainless steel RAPID SORB, or ULTRA SORB steam dispersion assemblies,
shall be single or double header, vertical tube design, suitable for mounting in the
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 23
.12
.13
.14
ductwork or air handler unit cabinets. The dispersion tubes shall be fitted with closely
spaced, thermal resin, calibrated orifice tublets.
The dispersion tubes shall be insulated with non-fibrous, closed-cell polyvinylidene
fluoride (PVDF) insulation to reduce energy loss and heat gain to the air system.
For units fitted for operation with potable or softened water, a drain cooler with a floor
mounting stand shall be provided.
Each unit shall be provided complete as noted above and with capacity and ratings as
per schedule. Capacities shown include an allowance for secondary steam condensate,
based on a developed length of __ meters (__ feet) of insulated inter-connecting piping.
2.31
HVAC SPLIT SYSTEMS
.1
Provide commercial air cooled split systems consisting of ceiling suspended fan coil
terminals and remote air cooled condensing units with capacities and characteristics as
described in the Equipment Schedules and in the following:
.1
Outdoor condensing unit:
.1
Factory assembled, single piece with all required wiring, piping, controls,
and R-22 refrigerant charge.
.2
Galvanized steel cabinet with baked enamel finish.
.3
Removable access panels for access to all components.
.4
Direct driven statically and dynamically balanced propeller type
condenser fans with class A insulation and permanently lubricated ball
bearings and internal thermal overload protection.
.5
Hermetic rotary type compressor with lubrication system, operating oil
charge, suction line accumulator, muffler, NEMA class F motor,
discharge valves, rubber vibration isolators.
.6
Aluminium fins/copper tube, cleaned, dehydrated, and sealed condenser
coil.
.7
Refrigeration components: liquid and suction line service valves and
service gauge ports, accumulator, pressure relief, liquid and suction line
piping kit, and refrigerant operating charge.
.8
Controls: Short cycling protection, automatic restart on power failure, high
temperature and freeze protection, system diagnostics, compressor motor
overcurrent, overtemperature protection, low ambient control to –28ºC
(-20ºF).
.2
Indoor fan coil section:
.1
Cabinet: zinc coated steel with baked enamel paint and matching
mounting brackets.
.2
Centrifugal fan with automatic motor driven vertical air sweep.
.3
Coils: Copper tube, aluminium fins and galvanized steel tube sheets
with drip pan and drain connection.
.4
Permanently lubricated multi-speed fan motor with inherent overload
protection.
.5
Cleanable slide-out filters.
.6
Controls: microprocessor based for space temperature, optimum fan
speed, run self diagnostics with test button, automatic restart after power
failure, 15 hour timer cycle for system on/off, high discharge temperature
shut-down.
.7
Also provide automatic changeover control with relay to enable operation
of perimeter heating hot water radiation valve.
.8
Wired remote system controller complete with interconnecting cable.
2.32
PUMPS AND CIRCULATORS
.1
Provide pumps and circulators of type and size as indicated on the pump schedules.
.2
All pumps: equipped with mechanical seals, non-overloading (not including motor service
factor) over entire performance curve and bronze fitted except where noted. Pumps for
domestic hot water service: all bronze body or stainless steel. Base mounted pumps:
complete with coupling guards.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 24
.3
.4
.5
.6
.7
.8
.9
.10
.11
.12
.13
.14
.15
.16
.17
.18
.19
.20
All vertical in-line and base mounted pumps with mechanical seals to be equipped with
factory installed Micro-Wynd II Cuno filters and Arkon flow indicators. Provide an
additional set of filters to replace original filters after system is cleaned and treated.
A single gauge shall be connected to the discharge and suction side of each pump and
across the strainer so that the differential pressures can be observed.
Submit certified pump curves with shop drawings. Pumps shall be selected such that
head at design conditions does not exceed 85% of maximum possible head at design
flow rate.
Manufacturer to include costs for checking and aligning pumps prior to start-up.
All piping connections to pumps shall be supported independently so that no strain is
imposed on the pump casing.
All pumps to have motor size large enough to not overload at runout condition. If this
requires larger motor than specified, pay for larger motor starter, wiring and the like.
Mount on cast iron or heavy steel base, having drip lips and tapped drainage holes.
Provide spool pieces on pump suction and discharges for future fitting of vibration
isolators if found necessary. To be 450mm (18") long for piping up to and including
50mm (2") and 600mm (24") long for piping 65mm (2½") and above.
Pump bases to have neoprene-steel-neoprene vibration isolators of sizes recommended
by Manufacturer.
Vertical In Line – Pumps to have radially split casing, bronze fitted construction, 175 psi pressure
rating, mechanical seal with flushing line, drip proof motor at 1725 rpm and stainless steel shaft.
Armstrong series 4360 or approved equal.
Horizontal In Line – Pumps to be bronze construction (domestic water usage to be all bronze)
125 psi, mechanical seal, sleeve bearings and open drip proof motors at 1725 rpm with resilient
mounting.
Fire pump – Refer to 15500 for requirements of fire pump
Excess Pressure Pump – Refer to 15500 for requirements of excess pressure pump
Sewage Pumps – to be vertical, shaft driven, single stage, non clog, centrifugal with cast iron
casing and impeller, ball thrust bearings, bronze guide bearings, grease lubrication, schedule 40
discharge, ball bearing induction motor at 1150 rpm. Provide a factory wired duplex panel and
emergency float in NEMA – 1 cabinet with starters, alternating relays, switches and indicating
lights.
Effluent Pumps – to be self priming, cast iron construction, complete with built in check valve,
mechanical seal, semi open impeller, open drip proof motor and floatless liquid level control.
Well Pump – to be submersible turbine with noryl impeller – diffuser assembly, brass intake
screen, splined stainless steel shaft, brass discharge head and bearings. Red Jacket or approved
equal. Provide HOA starter with three leg overload protection, lighting arrestor and liquid level
control for low water cut-off.
Sump pumps:
.1 Submersible type equal to Hydromatic W-A1only to be provided on this project.
Installations to include duplex pumps with cast iron body, thermoplastic impeller, oil
filled 1/3 horsepower motor with automatic reset thermal overload protection. Unit to
be provided with 6m (20 foot) cable.
.2 Pump discharge to be 38mm (1½”) NPT.
.3 Pump capacity to be 10 gpm at 22 foot head.
.4 High temperature sump pits to be provided with Flygt Model CF-3057 submersible
sump pumps to handle 100 gpm at 31 foot head with 5 hp motor. High temperature
pumps to be controlled with Endress + Hauser Prosonic S Model FDU91F ultrasonic
level sensor connected to Endress + Hauser Prosonic S Model FMU90 transmitter.
.5 Refer to Sump Pits in 15400 for further detail of sump pits. Refer to detail drawings
for piping details and split cover arrangement.
.6 Float & high water alarm controls to suit building control system. System to include
high water alarm and alternator. Controller to be connected to building DDC system
where available or be standalone where campus control network is not available.
Packaged pressure booster:
.1
Factory assembled and tested centrifugal pump package complete requiring field
connections only for piping and electrical power.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 25
.2
.3
.4
Control panel to be prewired with the following:
1. EEMAC-1 general purpose enclosure
2. One main disconnect
3. Fused power supply for each pump
4. Magnetic starters with 3 leg 0L protection
5. Selector switches (HOA) for each pump
6. Variable speed drive (VSD) for each pump
7. Pressure switches for low suction shut down [and operating]
8. Pressure gages for suction and discharge
9. High pump casing temperature automatic relief (purge)
10. Minimum run time relays
11. Flow or load sensing for pump sequencing
12. Pilot lights for power on, lead pump failure alarm, low suction pressure.
Valving and piping: Type K copper piping and headers with a pressure
regulating valve on each pump discharge to provide constant pressure at
variable flow sized to suit the application; check valves on each pump discharge;
shut-off valves on each pump suction (upstream of strainer) and after each check
valve; automatic thermal bleed on each pump for overheating protection on no
flow.
Operation: Flow or load sensing control to sequence pump operation in
accordance with demand with lead pump on continuously; if a failure of one
pump occurs, the next pump in sequence will operate. [During off-hours, lead
pump cycles in response to pressure switch control.]
2.33
RADIANT CEILING PANELS
.1
Refer to Architectural reflected ceiling plans and room finish schedule in addition to
Mechanical Drawings to determine location, quantity and finish of radiant panels.
.2
Refer to Architectural and Mechanical Detail Drawings for installation requirements and
panel/ceiling and wall interface.
.3
Radiant ceiling panel extrusions to consist of 600 mm (24”) wide extruded aluminium with
copper tubing of 14 mm (0.55”) I.D. mechanically attached to the aluminium face plate.
Copper tube to be held in place by an aluminium saddle, which extends more than half
way around the diameter of the tube. A non-hardening heat conductive paste to be
placed between copper tubing and aluminium face plate.
.4
Panels to be finished in standard Manufacturer’s colour as selected by the Consultant.
.5
Panel performance to be based on 180ºF [82ºC] mean water temperature resulting in a
performance rating of 421 Watts /metre for a 600 mm wide panel (438 Btu/in. ft. of 24”
panel). Individual panel outputs shown on the Drawings. Where panel is shown to be
extended from wall to wall (continuous), provide suitable “inactive” section(s) as
necessary to achieve a continuous appearance. Each panel section to have a maximum
pressure drop of 21kPa at design water flow.
.6
Submit Shop Drawings showing performance and all details on joints, connections and
circuiting.
.7
Standard of Acceptance: Airtex HEF-2 as manufactured by Adair Industries.
2.34
RADIANT FLOOR HEATING SYSTEM
.1
Provide a complete hydronic in-floor heating system.
.2
Provide a complete set of shop drawings indicating the exact tube layout, header
configuration, flow rates per tube and zone, heat output per room, pressure drop per
zone. Indicate the total floor heating system flow rates as well. If there is a charge for
these drawings, it is to be included in the tender price. Tube diameter, spacing number
of circuits etc to be the responsibility of the contractor. Note that the maximum pressure
drop through the tubing and headers shall not exceed 15 kPa (2psi).
.3
System shall be complete and shall include system design, tubes, tube bend supports,
tube tie-wires, heat emission sheets (if required), valves, fittings, manifolds and manifold
supports. Tube shall be warranted for 25 years. Associated accessory items furnished by
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 26
.4
.5
.6
.7
.8
.9
.10
.11
.12
.13
.14
.15
the Manufacturer shall be warranted for 24 months from date of acceptance by the
University of Manitoba.
Included - all labour, materials, transportation, equipment and services to install a
hydronic heating system where indicated on the shop drawings for the project.
Zone configuration shall be as indicated on the drawings. In no case shall any room not
be equipped with a radiant floor heating system (the only exception is the
Mechanical/Electrical Room and Entrance Vestibules).
The heat outputs per zone have been calculated and shown on the drawings, in no case
will any system that provides less heat output be accepted.
Related Work - examine all other portions of the subcontract documents for work or other
terms and conditions related to the work of this section. Provide all work hereunder as
required for the support and accommodation of related work.
Shop Drawings - descriptions of materials, details and installation shall be submitted for
approval and no fabrication shall be performed until approval is obtained.
All Components - of system shall be provided by Manufacturer including tubing, tubing
fittings, manifolds, manifold support brackets, wire ties and tubing bend supports as
manufactured by Manufacturer.
Design - the Under Floor Heating System shall be designed in accordance to the
instructions and testing methods furnished by the Manufacturer.
Installation - The Under Floor Heating System is installed in accordance with applicable
code requirements and instructions and testing methods furnished by the Manufacturer
Warranty - Tubing shall carry a twenty-five (25) year non-prorated warranty against
failure due to manufacturing defect or exposure to stress cracking agents. This warranty
is to include tubing embedded in concrete. Manifolds and other ancillary components
shall be warranted for twenty-four (24) months from date of sale.
Tubing
.1
Tubing shall be cross-linked polyethylene, rated at 180(F (82(C) maximum
working temperature and up to 100 psi (690 kPa) working pressure in
accordance with ASTM Standard F876-877.
.2
Tubing shall be of cross-linked polyethylene manufactured by the “Engel
Method”. The tubing shall have an oxygen diffusion barrier capable of limiting
oxygen diffusion through the tubing to no greater than .005 g/mn/day at 40(F
(4(C)
.3
Radiant floor tubing to be a PEX type tube with an integral oxygen diffusion
barrier.
.4
The minimum bend radius for cold bending of the tubing shall not be less than
eight (8) times the outside diameter. Bends with a radius less than stated will
require the use of a bend support as supplied by the tubing Manufacturer.
.5
Provide bending guides where the tube bending radius is less than 475 mm.
.6
Tubing embedded in concrete shall be secured to a welded wire fabric or
approved alternate fabric with wire ties provided by pipe Manufacturer. Spacing
of wire ties shall be maximum of 900mm (36”) for straight lengths of tubing and
a minimum of 3 ties per 180º turn.
.7
All tubing inside the concrete floor shall be seamless. Replace any damaged
tubing, do not repair.
Manifolds
.1
Shall be of cast bronze construction and shall have integral circuit balancing
valves. Supply and return manifolds shall be able to vent air from the system.
Manifolds shall be provided with support brackets and tube bend supports.
.2
Manifolds shall be isolated from supply and return piping with valves that are
suitable for isolation and balancing.
.3
Supply and return headers to be complete with isolation and balancing valves for
each circuit, as well as isolation valves for the entire header assembly. Provide
venting and valved drain.
Tube Fittings shall be manufactured of dezincification resistant brass. The tubing
Manufacturer must supply these fittings. The tube fitting consists of an insert, a serrated
compression ring and a nut.
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 27
.16
2.35
HEATING AND COOLING
Installation
.1
Hydronic heat tubing shall be installed in accordance with the recommendations
of Manufacturer.
.2
Installation shall follow the shop drawing for tubing layout and spacing. All notes
on the drawing will be followed.
.3
Where supply and return headers are required to be installed in exposed
locations, they shall be in 16 gauge steel cabinets with screwed fastening,
mounted securely to walls with a 300 x 900 x 20mm (12” x 36” x ¾”) plywood
fastening plate located behind the drywall. The cabinets shall have a removable
front, shall be painted as directed by the Consultant, and shall completely
enclose the header.
.4
Prior to the installation of concrete around the tubing, the system shall be
charged with water to a pressure of 40 psig. The system shall remain at this
pressure for a minimum of 24 hours to ensure system integrity.
.5
During installation of concrete that is to embed the tubing, the tubing shall remain
charged with water to a minimum pressure of 40 psig until the concrete has set.
.6
The subcontractor shall provide water for pressurizing the tubing.
.7
Contractor is to provide to Owner, upon completion of work, a completed and
required certified project checklist.
REFRIGERATION PIPING AND SYSTEMS
.1
Provide a complete refrigeration piping system by a recognized Contractor regularly
employed in commercial and industrial refrigeration.
.2
Size piping equivalent to a maximum of 1.10C (2ºF) temperature drop.
.3
Size and configure all suction and hot gas piping to ensure oil entertainment under
minimum load.
.4
Refrigeration circuits: provide strainer/driers, sight glasses, moisture indicators, shut-off
valves, thermal expansion valves, solenoid valves, receiver, refrigerant, oil, safety
accessories, etc.
.5
Provide all control wiring and motor control interlocks as described on the drawings and
as required by the equipment Manufacturer’s installation instructions and control
schematics to achieve required operating sequences and maximum equipment
protection.
.6
Provide a 100% parts and labour, and loss of refrigerant and oil (by leakage or
contamination) warranty for a two-year period after acceptance by the Owner.
.7
Piping: Type L, hard drawn copper piping, ASTM B 280, Type ACR, clean, dry and
capped.
.8
Fittings to be Wrought-Copper, ASME B16.22.
.9
Valves and Specialties: seal cap type, brass with Teflon seats; acceptable
Manufacturers: Superior, Mueller, Henry, or Frick. Check valves: type CK-1 as
manufactured by Refrigeration Specialties or Frick. Thermal expansion valves,
filter/driers, solenoid valves, moisture indicators: Sporlan. All thermal expansion valves
to be provided with external equalizers.
.10
A nitrogen purge shall be maintained when soldering all joints. Copper-to-copper joints
shall be made with a brazing alloy (Silfos). Copper-to-brass joints shall be made with
silver solder.
.11
Main piping fittings for dryers, sight glasses, expansion valves, and controls shall be only
flare or welded fittings.
.12
Prior to being charged with refrigerant, the system shall be evacuated to 500 microns and
held for at least 24 hours under this vacuum.
.13
Double-suction risers shall be employed on systems with capacity reduction and where
required by lift.
.14
Isolation valves shall be provided at all specialties.
.15
Installations shall be complete with dryers, sight glass, and thermostatically-controlled
solenoid valves for pump down operations.
February 27, 2015
University of Manitoba
Req #
Section 15700
Page 28
.16
.17
.18
2.36
HEATING AND COOLING
Where defrost units are required, they shall be operated electrically with adequate space
provided to replace defrost elements. Defrost shall not be limited to electrical units. In
larger installations, hot gas defrost is preferred.
Installations shall be provided with necessary protective devices including, but not limited
to, electric overload devices, low-suction pressure cutouts (manual reset), high head
pressure cutouts (manual reset), low-lube oil pressure cutouts (manual reset), oil traps,
crankcase heaters, and anti-recycling.
Voice/Data Room cooling units to be Canatal, Liebert, or Mitsubishi PUY/PKA. Units to
include indoor cooling unit and outdoor condensing unit rated for -40°C (-40° F)
operation. Indoor units to be wall mounted.
UNIT HEATERS (HOT WATER, GLYCOL, STEAM AND NATURAL GAS)
.1
Isolation valves shall be provided on each item.
.2
The heater finish, with a color chip, shall be submitted to the University Project Manager
for approval.
.3
Hot water or steam - Horizontal Type: Provide as shown on the Drawings and as
described in the Equipment Schedules as follows:
.1
Casing: 18 gauge cold-rolled steel with electrostatically applied epoxy powder
coat prime finish and with two 13mm (½”) threaded hanger connections and
individually adjustable four way louvered diffuser.
.2
Coil: Aluminum fins mechanically bonded to 13mm (½”) 0.035” thick copper tube
with galvanized steel casing and tested with air at 2065 kPa (300 psi). Headers
to be provided with steel MPT pipe connections.
.3
Fan: Propeller type, direct connected, dynamically balanced.
.4
Motor: open type, resiliently mounted, with permanently lubricated bearings,
internal overload protection, and permanent split capacitor type with fan guard.
.5
Disconnect switch: factory installed and wired.
.6
Thermostat: remote-type to cycle fan on/off.
.4
Hot water, glycol or steam - Vertical Type: provide as shown on the Drawings and as
described in the Equipment Schedules as follows:
.1
Casing: 18 gauge cold rolled steel with electrostatically applied epoxy powder
coat prime finish and with four 13mm (½”) threaded hanger connections.
.2
Coil: Aluminum fins mechanically bonded to 15mm (5/8”) copper tube with
galvanized steel casing and tested with air at 2065 kPa (300 psi). Headers to be
provided with steel MPT pipe connections.
.3
Fan: Propeller type, direct connected, dynamically balanced with fan guard.
.4
Motor: open type, with permanently lubricated bearings, internal overload
protection, and permanent split capacitor type securely mounted in a vented steel
well.
.5
Disconnect switch: factory installed and wired.
.6
Thermostat: remote type to cycle fan on/off.
.7
Diffuser: adjustable cone type
.5
Gas fired, propeller and centrifugal fan type:
.1
Completely factory assembled and test fired for operation on natural gas
[propane], CGA certified and in conformance with ANSI Standards for safe and
efficient performance.
.2
Casing: 20 gauge cold rolled steel with electrostatically applied and baked
enamel with formed steel four point hanger connections, horizontal adjustable
louvre and removable panel for access to controls, burners and pilot.
.3
Heat exchangers: seam welded 20 ga. Aluminized steel tubes and 18 ga.
Aluminized headers [409 stainless steel tubes and headers] [321 stainless steel
tubes and headers].
.4
Burner: die-formed corrosion resistant aluminized steel, with stainless steel port
protectors with individual manually adjustable draft. Burners to be individually
removable for servicing.
.5
Fans: all aluminum with aerodynamic contour dynamically balanced and provided
with protective guard and rubber-in-shear vibration isolators. Fans for propeller
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 29
fan units are direct driven. Fans for centrifugal units are belt driven with
adjustable pitch motor sheave.
.6
.7
.8
2.37
Motors:
.1
Motors for propeller fan units to be 1/60/115 volts, totally enclosed with built-in
thermal overload and permanently lubricated bearings.
.2
Motors for centrifugal units to be 1/60/115 volts, open drip proof with built-in
thermal overload protection.
.3
Provide explosion-proof motors in hazardous areas.
Controls: factory installed junction box for all electrical connections with 24 volt
combination single stage automatic gas valve, main operating valve, pilot safety shut-off,
pressure regulator, manual main and pilot shut-off valves and adjustable pilot valve, fan
time delay on start-up and shut-down.
Thermostat: Low voltage room thermostat, single stage with summer/winter switch and
universal tamperproof guard. Explosion-proof or remote thermostats to be provided in
hazardous areas.
WATER CHILLER (RECIPROCATING)
.1
Provide factory assembled air-cooled multiple compressor water chiller(s) with
characteristics and capacities as indicated in the equipment schedules.
.1
Construction: to ASME Standard, ARI standard 590-69, and CSA requirements
(CSA labelled). Compressors to be reciprocating, scroll or screw type and may
be hermetic sealed unserviceable type up to and including 15 tons capacity.
Compressors 20 tons capacity and greater to be semi hermetic serviceable.
.2
Compressors: complete with oil pump (in semi-hermetic units) suction and
discharge valves, individual spring vibration isolators, thermally protected motors,
crank case heater, operating oil charge.
.3
Factory installed circuit breakers calibrated manual reset, ambient insensitive, to
open all 3 phases if overloaded on any one phase.
.4
Cooler: Steel shell, 0.711mm (0.028”) wall thickness copper tubes with
removable heads, 2 direct expansion refrigeration circuits, covered with 20mm
(:”) closed-cell foam plastic vapour barrier insulation.
.5
Refrigeration circuits: discharge line check valves, hot gas mufflers, combination
moisture indicator and sight glass, filter/driers, liquid line solenoid valves, thermal
expansion valves, charging valves, suction lines insulated similar to cooler.
Provide suction, discharge and oil pressure gauges on each refrigerant circuit for
compressors 20 tons capacity and greater.
.6
Capacity control: multiple-step chilled water controller to provide individual
sequenced starting and loading [hot gas by-pass on lowest stage of capacity]
– on restart unit to revert to lowest stage of capacity.
.7
Safety and operating controls: prewired and pre-piped high and low pressure
cut-outs, oil failure, low water temperature cut-out, individual compressor
indicating lights, start-stop switches, control power circuit breakers, manual
lead-lag switch for compressors, starters with 3 leg overload protection and all
required relays for interlocking with air cooled condensers.
.8
Electrical connections: Power connections to unit Manufacturer supplied lugs at
one point only. Control connections to unit Manufacturer supplied numbered
terminal board.
.9
Spring isolators. Refer to section 15860.
.10
Refer to schematic drawings for water flow arrangement.
.2
Provide a four (4) year parts and labour extended warranty on the compressor(s).
PART 3 – EXECUTION
3.1
CHILLERS
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 30
.1
.2
.3
.4
.5
.6
.7
.8
.9
.10
.11
.12
.13
.14
.15
.16
Provide all necessary refrigerant relief lines, break-away flanges, valves, pneumatic and
electric control connections and piping for chiller oil cooler and purge unit as required by
chiller Manufacturer.
Install pipeline thermometers and/or sensor wells as required on system side of
break-away flanges.
Install in arrangements as shown on the drawings and when chiller installation consists of
two units, or pairs of units, install each pair such that the control panel fronts face inward
toward each other. If chiller installation is an odd number, i.e., 3 or 5, all control panel
fronts to face each other as above. The odd unit panel to face the opposite side of the
adjacent unit.
Provide 1200mm (48”) spacing minimum between chiller control panel fronts. Provide
rear service space as required by the Manufacturer but in no case less than 600mm (24”)
from any component on the chiller.
Refer to Section 15050 and Division 16 for wiring requirements.
Install units on a flat surface level within 3mm (1/8") and of sufficient strength to support
concentrated loading with isolation spring assemblies under the units.
Install components furnished by the Manufacturer.
Provide all water piping so unit and water circuits are serviceable without having to
dismantle excessive lengths of pipe.
Provide valves in water piping upstream and downstream of the evaporator and
condenser connections for isolating the shells for maintenance.
Provide drain valves and vent cocks to each water box.
Install loose temperature sensors in accordance with the Manufacturer's
recommendations.
Provide all necessary auxiliary water piping for oil cooler in accordance with the
Manufacturer's recommendations.
Provide pressure relief piping from relief valve to outside in accordance with
Manufacturer's instructions and CSA-B52-1992.
Provide certified wiring schematics to the electrical division for the chiller, associated
equipment and controls.
Provide all necessary control wiring as recommended by the Manufacturer.
Provide flow switches in both chilled and condenser water piping interlocked to the
control panel.
3.2
COOLING TOWERS
.1
Install in arrangement as shown on the drawings.
.2
Install cooling towers on supports of sufficient height to elevate bottom of sump 300mm
(12") minimum higher than the top of the condenser shell on the chiller and in no case
less than 1.83 m (6 ft.) higher than the centre line of the condenser pump suction
connection.
.3
Provide additional bracing for ladder where extended to roof level or grade.
.4
Mount control panel such that it is accessible from roof level or grade.
3.3
ELECTRIC REHEAT COILS
.1
Install to Manufactureres instructions ensuring direction of air flow.
.2
Install minimum of 5 duct diameters down stream and 2 duct diameters upstream of any
elbow.
.3
Where transitions are required use 15° maximum tapers.
.4
Arrange for ease of access to coil and components.
.5
Adequately support coil.
3.4
EQUIPMENT
.1
Provide the necessary access space around components to allow for servicing, repair,
replacement as well as for the TAB technician to take proper readings. Allow adequate
straight duct sections from fan outlets, elbows, or open duct ends to provide accurate
duct traverse readings.
February 27, 2015
University of Manitoba
Req #
HEATING AND COOLING
Section 15700
Page 31
.2
.3
.4
.5
.6
.7
.8
Deliver equipment and store in area as designated by the Project Coordinator. Set
equipment on temporary bases to avoid contact with the ground. Protect equipment from
damage.
Locate equipment as shown on the drawings to provide best possible connection
arrangement and accessibility for servicing. Provide clearances on all sides of equipment
as required by Authorities having jurisdiction or Manufacturer, whichever is greater.
Install items of equipment such as convectors with due regard to Architectural treatment,
and ensure all items are level and finished in keeping with good workmanship. Grade all
convector elements upward in direction of flow for proper air venting.
Provide drains to nearest floor drain on all back flow preventers.
Provide chemical treatment connections on all piping circuits as directed by Water
Treatment Supplier (Div 15200).
Pitch coils for air handling systems 18mm/m (¼"/ft) toward access end of unit.
Install and connect remote components such as thermostats, humidistats, control panels,
level controllers, etc., that are supplied with the equipment. Install in locations as shown
on the drawings and/or as required to make equipment function as required.
3.5
FLUID COOLERS
.1
Install the fluid cooler in location as shown on the drawings and away from walls or
fences that may reduce air flow or contribute to air side short circuiting.
.2
Provide vibration isolators for the fluid cooler. Refer to Sections 15010, 15050, and
15860.
3.6
HEAT PUMPS
.1
Central panel supplier to install and wire panel and test entire system.
.2
A complete test report to be provided as a condition of acceptance by the Consultant.
3.7
INFRA-RED HEATERS
.1
Install Infrared heaters in locations and elevations as shown on the drawings. Take care
to ensure a neat installation to provide the best possible appearance. Install exposed
items such as piping, vent tubing or wiring parallel with wall and ceiling surfaces.
3.8
PLATE HEAT EXCHANGERS
.1
Install level and firmly anchored to supports.
.2
Arrange piping so that tube bundles can be removed after disconnecting flanges adjacent
to head and without disturbing other equipment and systems.
.3
Arrange layout of equipment so that clearances are maintained for maintenance and
safety.
.4
Install with safety relief valve and drain valve or other appurtenances piped to drain.
Glycol fittings to be drained to glycol storage tank and not down drain.
.5
Install thermometer wells, thermometers and pressure gauges on all inlet and outlet
piping.
.6
Install plate exchangers in accordance with Manufacturer’s recommendations.
3.9
PUMPS
.1
Mount all vertical in-line pumps over 3.73 kW (5 HP) at floor level.
.2
Provide a minimum of 1800mm (6') of pipe on pump suction one size larger than pump
inlet complete with strainer and valve.
.3
Provide 12mm (½") drain lines with ball valves from strainers and Cuno filters to nearest
floor drain or, in the case of glycol, to a suitable container.
3.10
RADIANT CEILING PANELS
.1
Co-ordinate with other trades working in ceiling areas to achieve a neat, installation.
.2
Interconnect radiant panels with 12mm (½“) OD soft copper tubing or other devices as
recommended by the Manufacturer such as factory supplied 360° soft copper
interconnecting loops and 180° return bends as shown on the Detail Drawings.
February 27, 2015
University of Manitoba
HEATING AND COOLING
Req #
Section 15700
Page 32
.3
.4
.5
.6
.7
.8
Install hanger wire at 100 mm O.C. as recommended by the Manufacturer. Where cross
tees are used between panel ends, fasten cross tees to wall moulding and main tee and
flush with exposed edge of moulding.
All system piping to be thoroughly cleaned, flushed, drained and refilled before radiant
panels are connected into the system.
Do not begin installation of radiant panels until all glazing has been completed and all
exterior openings closed -in.
Cover all active and inactive panel sections with 50 mm (2”) thick batt insulation - refer to
Section 15180.
Co-ordinate with drywall and/or ceiling installation Subtrades for the proper location of
supporting tees and cross tees and where panel sections interface with drywall or ceiling
systems.
Supply and install isolation ball valves on supply and return piping at each panel to allow
for servicing of each unit without disrupting system operation.
3.11
REFRIGERATION SYSTEM
.1
Install piping, components, equipment, etc., in accordance with schematics, code and
standard industry practice.
.2
During brazing procedures, charge piping with inert gas to prevent scale formation.
.3
Pressure tests: Prior to application of insulation and dehydration, test all systems under
pressure with nitrogen for 24 hours minimum until no pressure drop occurs. If leaks are
detected, repeat test procedure after repairs. Test high side at 2100 kPa (300 psi) and
low side at 1050 kPa (150 psi).
.4
Dehydration: Evacuate system, and hold for 24 hours minimum a vacuum of 99.9 kPa
(29" HG). Break vacuum with refrigerant operating charge, monitor moisture indicators
and change or replace filter/driers, or filter drier cores until moisture is eliminated.
.5
Start-up system, monitor operation and perform all tests to ensure system operates to
Manufacturer's requirements. Issue certificate attesting thereto.
.6
Instruct Owner in proper operating procedures.
3.12
ROOFTOP EQUIPMENT
.1
Install rooftop HVAC and H&V equipment on bases per Manufacturer's instructions and in
locations as shown on the Drawings. Provide PVC condensate drains to roof for HVAC
units. Provide condensate drains with deep seal traps as shown on U of M detail sheet.
Condensate must be effectively trapped to avoid condensate hang-up in the unit and to
prevent air flowing into the unit through the trap.
3.13
STAND-BY GENERATOR EXHAUST
.1
Refer to detail drawing and install fuel systems, ventilation, exhaust piping, muffler and
flexible connections as shown.
3.14
WATER BALANCING
.1
Provide flow measurement ports as shown on drawings, on piping schematics, and in
locations as directed by the water balancing specialist.
.2
Provide any pump impeller modifications as recommended by Division 15990.
END OF SECTION 15700
February 27, 2015