University of Manitoba
AIR DISTRIBUTION
Req #
Section 15800
Page 1
PART 1 - GENERAL
1.1
DESCRIPTION
.1
All drawings and all sections of the specifications shall apply to and form an integral part
of this section.
1.2
QUALITY ASSURANCE
.1
Execute work of this Section only by skilled tradespeople regularly employed in the
manufacture and installation of sheetmetal ductwork and air handling equipment.
1.3
COMMISSIONING
.1
Refer to Section 01810 Quality Commissioning for the details of the commissioning process.
1.4
SUBMITTALS
.1
Submit shop drawings for all system components.
.2
Provide fan curves for all fans 100 l/s (200 CFM) and greater capacity.
1.5
WORK PERFORMED BY THIS SECTION
.1
Provide a complete installation of ventilation systems as shown of the Drawings and
Detail Drawings.
.2
Install all automatic dampers supplied by Section 15900.
PART 2 - PRODUCTS
2.1
ACOUSTIC INSULATION
.1
Fibreglass materials are not to be used in any internal portion of the ventilation systems.
.2
Provide acoustic lining in all ductwork where indicated on drawings, 25mm (1") thick, 24
kg/m; (1.5 lbs/ft ;) density, closed-cell foam sheet insulation. Where located outdoors,
use 50mm (2") thick insulation.
.3
Duct sizes to increase accordingly to maintain equivalent free area.
.4
All acoustic cross talk silencers and ducting shall also be constructed with closed-cell,
sheet insulation materials.
.5
Product must be cleanable and have zero water absorption.
.6
Installation shall not include any tapes, fabrics, cements, or other materials, which hold
moisture, offer the opportunity for mold growth, or are not cleanable.
.7
Installation shall withstand air velocities of up to 13 m/s (2500 fpm).
2.2
AIR TO AIR HEAT EXCHANGER
.1
Provide air to air heat exchanger with 0.85 mm (22 gauge) galvanized steel enclosure,
0.021" (0.5 mm) corrugated aluminum plates bonded with non-combustible polyester resin
with 200°F (90°C) maximum temperature, one 50 mm (2") drain connection on exhaust side
at high temperature end, plate support 6" 150 mm top and bottom, and S-lock duct
connection, 3/8" (10 mm) plate spacing.
.2
Provide hinged and latched double thickness, insulated access doors at all duct
connections.
.3
Provide prefilter bank on both air inlets to heat exchanger.
.4
Notwithstanding that stated above, in no case shall the exchanger casing be constructed of
metal thinner than that of the heaviest duct section in equivalent galvanized iron, connecting
to the unit.
.5
Kitchen exhaust applications shall be equipped with wash down header, solenoid valve
wash cycle timer, detergent bottle, etc., for a complete system ready for operation.
.6
Kitchen exhaust applications shall have U.L.C. fire dampers on the fresh air inlet and outlet
and any ductwork between such closures and unit shall be of a thickness equal to that of the
unit.
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Section 15800
Req #
Page 2
.7
2.3
Units shall have an efficiency of (
) when handling (
exhaust, with a pressure drop of ) s.p.
) cfm (
) l/s on supply and on
BELT DRIVEN BACKWARD INCLINED CENTRIFUGAL INLINE FANS
.1
General
.1
Capable of operating temperature up to 180 Fahrenheit (82.2 Celsius)
.2
Each fan shall bear a permanently affixed manufacture's engraved metal nameplate
containing the model number and individual serial number
.2
Wheel:
.1
Non-overloading, backward inclined centrifugal wheel
.2
Constructed of aluminum
.3
Statically and dynamically balanced in accordance to AMCA Standard 204-05
.4
The wheel cone and fan inlet will be matched and shall have precise running
tolerances for maximum performance and operating efficiency
.5
Single thickness blades are securely riveted or welded to a heavy gauge back plate
and wheel cone.
.3
Motors:
.1
Motor enclosures: Open driproof
.2
Motors are permanently lubricated, heavy duty ball bearing type to match with the
fan load and pre-wired to the specific voltage and phase
.4
Shafts and Bearings:
.1
Fan shaft shall be ground and polished solid steel with an anti-corrosive coating
.2
Permanently sealed bearings or pillow block ball bearings
.3
Bearing shall be selected for a minimum L10 life in excess of 100,000 hours
(equivalent to L50 average life of 500,000 hours), at maximum catalogued operating
speed
.4
Fan Shaft first critical speed is at least 25 percent over maximum operating speed
.5
Housing/Cabinet Construction
.1
Square design constructed of heavy gauge galvanized steel and shall include
square duct mounting collars
.2
Housing and bearing supports shall be constructed of heavy gauge bolted and
welded steel construction to prevent vibration and to rigidly support the shaft and
bearing assembly.
.3
Aluminum construction is available in sizes 70-300
.6
Housing Supports and Drive Frame:
.1
Housing supports are constructed of structural steel with formed flanges
.2
Drive frame is welded steel which supports the shaft and bearings and
reinforcement for the housing
.3
Pivoting motor plate with adjusting screws to make belt tensioning operations
.7
Drive Assembly:
.1
Belts, pulleys, and keys oversized for a minimum of 150 percent of driven
horsepower
.2
Belts: Static free and oil resistant
.3
Pulleys: Cast type, keyed, and securely attached to wheel and motor shafts
.4
Motor pulleys are adjustable for final system balancing
.5
Readily accessible for maintenance
.8
Duct Collars:
.1
Square design to provide a large discharge area
.2
Inlet and discharge collars provide easy duct connection
.9
Access Panel:
.1
Two sided access panels, permit easy access to all internal components
.2
Located perpendicular to the motor mounting panel
.10
Options/Accessories:
.1
Belt Guards: Three-sided fabricated steel belt guard covers drive and motor
.2
Belt Type: Type: Standard
.3
Extended Lube Lines: Grease zerks on housing exterior allows for lubrication of
February 27, 2015
University of Manitoba
Req #
AIR DISTRIBUTION
Section 15800
Page 3
bearings without disassembling the fan
Finishes: Coating type: Permatector
Insulated Housing: Thickness: 0.5 inches for noise reduction and condensation
control; constructed of closed cell liner
.6
Isolation: As per section 23 05 48.
.7
Motor Cover: Constructed of galvanized steel, covers motor and drives for safety.
Standard on unit specified with UL
.8
Wiring Pigtail: Direct hook-up to the power supply; nine foot wiring extension
Refer to fan schedule at end of mechanical specification.
.4
.5
.11
2.4
BELT DRIVEN BACKWARD INCLINED CENTRIFUGAL UTILITY FANS
.1
General Description:
1.
Fan type in AMCA Arrangement 10 with a single width and single inlet housing
2.
Normal operating temperature up to 200 Fahrenheit (93.3 Celsius)
3.
Each fan shall bear a permanently affixed manufacture's engraved metal
nameplate containing the model number and individual serial number.
4.
Fume hood exhaust fans shall have acid-resistant coating; two coats air-dried
"Heresite" or equal. Design static shall not be less than 1-in. static pressure.
Spark resistance is required for explosive atmospheres. Where design
conditions do not permit the use of coatings, requirements shall be discussed
with the Consultant.
.2
Wheel:
1.
Non-overloading, backward inclined centrifugal wheel
2.
Constructed of aluminum
3.
Statically and dynamically balanced in accordance to AMCA Standard 204-05
4.
The wheel cone and fan inlet will be matched and shall have precise running
tolerances for maximum performance and operating efficiency
5.
Single thickness blades are securely riveted or welded to a heavy gauge back
plate and wheel cone.
.3
Motors:
1.
Motor enclosures: Totally Enclosed Fan Cooled
2.
Motors are permanently lubricated, heavy duty ball bearing type to match with
the fan load and pre-wired to the specific voltage and phase
.4
Shafts and Bearings:
1.
Fan shaft shall be ground and polished solid steel with an anti-corrosive coating
2.
Permanently sealed bearings or pillow block ball bearings
3.
Bearing shall be selected for a minimum L10 life in excess of 100,000 hours
(equivalent to L50 average life of 500,000 hours), at maximum cataloged
operating speed
.5
Housing:
1.
Discharge position specified on equipment schedule
2.
Constructed of heavy gauge (galvanized) steel, with air tight lock formed seams
3.
Shall be easily rotated in the field to any of the eight standard discharge positions
4.
Housing and bearing supports shall be constructed of welded steel members to
prevent vibration and to rigidly support the shaft and bearing assembly.
.6
Housing Supports and Drive Frame:
1.
Housing supports are constructed of structural steel with formed flanges
2.
Drive frame is welded steel which supports the shaft and bearings and
reinforcement for the housing
3.
Pivoting motor plate with adjusting screws to make belt tensioning operations
4.
Prepunched mounting holes for installation
5.
Drive frame is coated with Permatector
.7
Drive Assembly:
1.
Belts, pulleys, and keys oversized for a minimum of 150 percent of driven
horsepower
2.
Belts: Static free and oil resistant
February 27, 2015
University of Manitoba
Req #
Section 15800
Page 4
.8
.9
2.5
AIR DISTRIBUTION
3.
Pulleys: Cast type, keyed, and securely attached to wheel and motor shafts
4.
Motor pulleys are adjustable for final system balancing
5.
Readily accessible for maintenance
Options/Accessories:
1.
Access Door: Type: Hinged, provides access for inspection and cleaning of
wheel
2.
Belt Guards: Three-sided fabricated steel belt guard covers drive and motor
3.
Weatherhood: Completely cover motor and drive compartments vented to
provide sufficient motor cooling. Required to meet UL 705.
Refer to fan schedule at end of mechanical specification.
BREECHINGS AND STACKS
.1
Natural draft appliances:
.1
Gas vents for atmospheric gas–fired equipment: Type B complete with all
supports, flashings, fire stops, base support, rain caps, base tee with cleanout,
etc., in sizes as shown complete to meet requirements of Authorities. Provide
insulated type vent, in accordance code, where located outdoors (above the
roofline or beyond exterior walls).
.2
For forced draft appliances and stand-by generator exhaust:
.1
Boiler stack and breeching components, supports and terminations shall be
factory prefabricated and tested. All components shall be listed by Underwriters
Laboratories (ULC), as described in NFPA 211. The breeching and stack system
shall comply with all safety and building codes where applicable.
.2
Breeching assemblies and stacks shall have inner walls of 20 gauge, type 304
stainless steel. Indoor assemblies and stacks shall have outer walls of aluminum
coated 20gauge steel. Portions of the stack system on the outside of the building
shall be furnished with an outer wall of 20 gauge, 304 stainless steel.
.3
Breeching and stack system sections joints shall be sealed by use of
containment bands with captive fasteners and high temperature joint sealant.
Assemblies utilizing metal screws through inner and/or outer walls will not be
accepted.
.4
The breeching and stack system joints shall maintain airtight integrity at
pressures up to 72” (180 cm). Breeching and stack systems shall be designed to
adjust to thermal expansion caused by the heating and cooling of normal
equipment operation.
.5
The breeching and stack system Manufacturer must furnish complete system
CAD submittal drawings of the assembly.
.6
Material required for breechings and stacks within the building is based on
Cleaver-Brooks Model CBS-11 having double wall and 1” air insulation. Material
required for stack systems on the building exterior is based on Cleaver-Brooks
Model ICBS-11 having double wall and 1” fibre insulation.
.7
All system components must be warranted for a minimum of 15 years when
installed in accordance with the Manufacturer’s instructions and operated within
the design parameters.
.8
Where shown and sized on the drawings for forced draft equipment, provide
breechings of 10 gauge [galvanized iron] [stainless steel] [mild steel] with
welded or flanged joints. Flanged joints: 25mm x 25mm x 3mm (1” x 1” x 1/8”)
stainless steel angle continuously welded to the breeching, sealed with approved
high temperature gasketting and secured with 6mm (1/4”) bolts, 100mm (4”) on
centre. Cleanouts: 6mm (1/4”) [stainless steel] [mild steel] plate gasketted and
bolted to steel angle as used in flanged joint.
.9
Provide 12-gauge black iron breaching all welded for oil fired equipment with
connections and supports to code requirements.
.10
Chimney and breechings shall be installed complete with all supports, flashings,
rain caps, thimbles, etc., in size as shown complete to meet requirements of
Authorities having jurisdiction.
February 27, 2015
University of Manitoba
Req #
AIR DISTRIBUTION
Section 15800
Page 5
2.6
CABINET FANS
.1
Provide cabinet mounted fans with single or double forward curve double inlet fans with
insulated heavy gauge enamelled steel cabinet with enclosed motor, pulleys and belts.
.2
Drive pulley to be variable pitch.
.3
Support on spring isolators from building structure.
.4
Provide all required support members.
.5
See fan chart for operating characteristics and any deviations from the above.
2.7
CEILING MOUNTED CENTRIFUGAL CABINET FANS
.1
Twin or single blower, acoustic lined cabinet, complete with inlet grille where shown and
disconnect switch or receptacle, and back draft dampers.
.2
See fan chart for operating characteristics and any deviations from the above.
2.8
CENTRIFUGAL FANS
.1
Provide as indicated on the drawings and in the equipment schedules, statically and
dynamically balanced, constructed in conformance with AMCA 2408-69 and carrying the
AMCA seal.
.2
Bearings: Roof and sidewall domed type small utility fans etc.: Sealed permanently
lubricated ball bearing. Belted ventilating sets and Class I and Class II. Fans: Heavyduty ball bearings, 200,000-hour bearings with grease extensions where applicable, grease
lubricated self-aligning pillow block. On arrangement III single inlet fans with ducted
inlets, provide extended lubrication fittings.
.3
Provide electric motors, vibration isolators, variable pitch drives, inlet screen, belts, belt
guards, weatherhoods where mounted outdoors and back draft dampers on exhaust
fans. Provide integral bases on floor mounted Class I and Class II fans.
.4
Provide fixed pitch drive sheaves on fans greater than 5.6 kW (7.5 HP). Provide two sets
of sheaves; one set to provide specified RPM and another set as specified by the air
balance firm should field testing make this necessary.
.5
Belt Guards: Provide expanded metal type with 25mm (1") dia. tachometer openings at
both fan and motor shaft locations. Provide one opening with adjustable plate to
compensate for motor position adjustment.
.6
On fans for variable air volume duty, provide variable inlet vanes with factory installed
linkages and with [pneumatic industrial type actuators suitable for 100 kPa (15 psi)
control air pressure and 20 to 100 kPa (3 to 15 psi) pilot signal to actuator mounted pilot
positioner.] [Electric/electronic actuators compatible with DDC system provided by
Section 15900 Subcontractor.]
.7
See fan chart for operating characteristics and any deviations from the above.
2.9
CIRCULATION FANS
.1
Provide infinite speed solid-state controlled down blow propeller fans with 1400-mm (56")
diameter fan, discharging 8000 l/s (16,000 cfm) at high speed at 670 rpm. Refer to drawing
for number of fans and control points.
.2
Provide angle iron and finished expanded metal enclosure with hinged and latched access
door.
.3
See fan chart for operating characteristics and any deviations from the above.
2.10
DIRECT DRIVE INLINE CABINET CENTRIFUGAL EXHAUST FANS
.1
General Description:
.1
Maximum operating temperatures is 130°F (54.4°C).
.2
Fans are UL/cUL listed 507 - Electric Fans.
.3
Each fan shall bear a permanently affixed manufacture's nameplate containing
the model number and individual serial number.
.2
Wheel:
.1
Forward curved centrifugal wheel
.2
Constructed of calcium carbonate filled polypropylene
February 27, 2015
University of Manitoba
Req #
Section 15800
Page 6
.3
.4
.5
.6
.7
.8
.9
.10
2.11
AIR DISTRIBUTION
.3
Statically and dynamically balanced in accordance to AMCA Standard 204-05
Motors:
.1
Motor enclosures shall be open driproof (ODP), opening in the frame body and or
end brackets
.2
Motors are permanently lubricated sleeve bearing type to match with the fan load
and furnished at the specific voltage and phase
.3
Motor shall be mounted on vibration isolators and be accessible for maintenance
.4
Compatible for use with speed controls
.5
Thermal overload protection
Housing:
.1
Constructed of heavy gauge galvanized steel
.2
Interior shall be lined with 0.5 inches of acoustical insulation
.3
Profile as low as 6 15/16 inches
.4
Includes prepunched mounting brackets
Aluminum Backdraft Damper:
.1
Prevents air from entering back into the building when fan is off
.2
Eliminates rattling or unwanted backdrafts
Outlet:
1.
Outlet shall be square type
2.
Field rotatable from horizontal to vertical discharge
Mounting Brackets:
1.
Fully adjustable for multiple installation conditions
Access Panel:
.1
Once installed shall have easy access to internal components
Options/Accessories:
1.
Transformers: Available for applications requiring voltage reduction. All
transformers are shipped loose
Refer to fan schedule at end of mechanical specification.
DIRECT DRIVE ROOF DOWNBLAST CENTRIFUGAL EXHAUST FANS
General Description:
.1
Maximum continuous operating temperature is 180 Fahrenheit (82.2 Celsius)
.2
Each fan shall bear a permanently affixed manufacture's engraved metal
nameplate containing the model number and individual serial number.
.2
Wheel:
.1
Constructed of aluminium
.2
Non-overloading, backward inclined centrifugal
.3
Statically and dynamically balanced in accordance to AMCA Standard 204-05
.4
The wheel cone and fan inlet will be matched and shall have precise running
tolerances for maximum performance and operating efficiency.
.3
Motors:
.1
Electronically Commutated Motor: Motor enclosures: Open type, motor to be a
DC electronic commutation type motor (ECM) specifically designed for fan
applications. AC induction type motors are not acceptable. Examples of
unacceptable motors are: Shaded Pole, Permanent Split Capacitor (PSC), Split
Phase, Capacitor Start and 3 phase induction type motors. Motors are
permanently lubricated, heavy duty ball bearing type to match with the fan load
and pre-wired to the specific voltage and phase. Internal motor circuitry to
convert AC power supplied to the fan to DC power to operate the motor. Motor
shall be speed controllable down to 20% of full speed (80% turndown). Speed
shall be controlled by either a potentiometer dial mounted at the motor or by a 010 VDC signal. Motor shall be a minimum of 85% efficient at all speeds.
.4
Housing:
.1
Motor cover, shroud, curb cap, and lower windband shall be constructed of heavy
gauge aluminium
.2
Shroud shall have an integral rolled bead for extra strength
.1
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Section 15800
Req #
Page 7
.3
.4
.5
.6
Shroud shall be drawn from a disc and direct air downward
Lower windband shall have a formed edge for added strength
Motor cover shall be drawn from a disc
All housing components shall have final thicknesses equal to or greater then
preformed thickness.
.7
Curb cap shall have pre-punched mounting holes to ensure correct attachment
.8
Rigid internal support structure
.9
Leak proof
Housing Supports and Drive Frame:
.1
Drive frame assemblies shall be constructed of heavy gauge steel and mounted
on vibration isolators
Vibration Isolation: As per section 23 05 48
Options/Accessories:
.1
Birdscreen: Material Type: Aluminum to protect fan discharge
.2
Roof Curbs: Types: GPI; Mounted onto roof with fan Material: Galvanized;
Insulation thickness: 2 inches; Coating Type: Permatector
.3
Curb Extension:
.4
Curb Seal: Rubber seal between the fan and the roof curb
Refer to fan schedule at end of mechanical specification.
.5
.6
.7
.8
2.12
DRIP PANS
.1
Drip pans shall be constructed of galvanized iron one gauge heavier than indicated in duct
gauge schedule, with all joints soldered. Line inside with two coats of mastic and insulate
exterior.
.2
Pans shall have 50 mm (2") high sides and shall be 150 mm (6") larger in both directions
than the size of the device or opening requiring the pan.
.3
Where shown on the plans provide soldered drain fitting and local drain fitting and local drain
line in size indicated.
2.13
DUCTWORK
.1
Provide rectangular and round ductwork constructed of galvanized steel sheets as
follows as a minimum but not less than required by SMACNA HVAC Duct Construction
Standards:
TYPE
MAXIMUM
DIMENSION
GAUGE
JOINTS
Round spiral
4 ply seam
450 mm
(18")
26
Slip joint with 3#8 screws evenly
spaced.
457 to 750 mm
(19" to 30")
24
Slip joint held with 3#8 screws evenly
spaced.
Rectangular
with Pittsburgh
Up to 300 mm
(12")
26
S & drive
Longitudinal
seam
325 to 750 mm
(13" to 30")
24
S & drive
775 to 1275 mm
(31" to 50")
22
25 mm (1") bar slip or standing T @
1500 mm (60") o/c. maximum.
1300 to 1500
mm
(51" to 60")
20
As above with 40 mm (1½") bar slip
or standing T.
1525 to 2250
18
As above except provide 40 mm x 40
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Section 15800
Req #
Page 8
mm
(61" to 88")
.2
.3
.4
.5
.6
.7
.8
.9
.10
.11
.12
.13
.14
mm x 5 mm (1½" x 1½" x 3/16")
angle reinforcement at 750 mm (30")
o/c.
Cross-break all ductwork greater than 300mm (12").
Duct sizes shown shall be the inside clear dimension.
Drier exhaust ducts: Provide aluminum ductwork with all joints and connections sealed.
Button lock longitudinal seam may be used provided seam is sealed or caulked with high
velocity duct sealer.
Shower room exhaust ductwork: Where indicated on drawings one gauge lighter than
listed above constructed of 316 stainless steel. Use stainless steel screws on any
fastenings and stainless steel hangers.
Laboratory fume hood exhaust ductwork: One gauge heavier than standard ductwork and
constructed of 316 stainless steel. Ducting to be all welded construction. Hangers to be
stainless steel and any bolts and screws used are also to be stainless steel.
Flammable storage cabinet exhaust ductwork: One gauge heavier than standard
ductwork and constructed of 316 stainless steel. Ducting to be all welded construction.
Use only stainless steel screws on any fastenings and stainless steel hangers.
Spin-on type connections from main trunk to VAV terminals may be used. Provide
balancing dampers for all connections to ceiling diffusers.
In place of previously specified duct joints, "Nexus" or "Ductmate" gasketed flanges may
be used provided gasketing meets approval of ULC and installation is to SMACNA
Standards.
Kitchen Exhaust:
.1
Exposed ductwork to be 16 gauge stainless steel all welded construction with
gasketted and bolted access doors at each change in direction or 3 M (10'-0") o/c.
to current N.F.P.A. standard.
.2
Concealed ductwork to be 16 gauge black iron all welded construction with
gasketted and bolted access doors at each change in direction or 3 M (10'-0") o/c.
to current N.F.P.A. standard.
.3
Clean-out openings: 200mm x 300mm (10" x 12") framed on the side of the duct
using 25mm x 25mm (1" x 1") steel angle externally continuously welded with
cover all same gauge material as duct and with drillings at corners and at 100mm
(4") on centre on sides.
.4
Use only stainless steel ductwork, hangers, and supports where installation is
exposed in the interior of the building.
.5
Duct Hangers: 16 ga. mild steel straps 25mm (1") wide. 25mm x 25mm (1" x 1")
16 ga. angles for support of risers.
Internal Insulation of air handling casings is specified in Section 15180.
.1
Refer to detail drawings regarding air handling unit plenum access doors, drip trays,
and coil mounting.
Internal Insulation of air handling casings is specified in Section 15180.
.1
Refer to detail drawings regarding air handling unit plenum access doors, drip trays,
and coil mounting.
Flexible Ductwork
.1
Flexible connections shall be provided at connections to ALL moving equipment.
.2
Flexible ductwork: provide where indicated on the drawings Thermoflex M-KC
vinyl covered spring.
.3
Flexible air ducts shall conform to UL-181 Standard and NFPA 90A. Flexible air
ducts shall have a fire rating of at least one-half hour as measured by UL-181
Standard, paragraph No. 7, Flame Penetration Test.
.4
Do not restrict duct free area. Attach with galvanized wire hose clamps and DuroDyne S-2 duct sealer. Connections to operate at 10” W.C. without leakage or
bursting.
.5
Maximum length of flexible duct to be 1500 mm (5’–0”).
February 27, 2015
University of Manitoba
Req #
AIR DISTRIBUTION
Section 15800
Page 9
2.14
DUST SYSTEM
.1
Supply and install a complete dust collection system as indicated and specified herein.
.2
Dust System: This system shall be constructed of galvanized iron and shall be free from any
obstructions including burrs and the like. Generally, the system installation shall comply with
the following:
.1
Up to 200 mm in the largest dimension - 0.85-mm.
.2
225 mm to 450 mm in the largest dimension - 1.0 mm.
.3
475 mm to 750 mm in the largest dimension - 1.3 mm.
.4
All joints shall be compression fit type with 25-mm lap up to and including 450-mm
diameter ducts and 32 mm laps for ducts of 475 mm in diameter and over.
.5
All elbows shall have radii equal to two duct diameters and shall be one gauge
heavier than the connecting straight sections. Elbows 150 mm in diameter and
smaller shall be five section elbows and ducts over 150 mm in diameter shall be 7
sections. Prefabricated elbows of smooth construction may be used in lieu of the
above.
.6
High-pressure flexible connections at fan inlet and outlet.
.7
Transitions not to be less than 125 mm of run for each 25 mm change in diameter.
.8
No two branch ducts may connect to the main at the same point.
.9
A minimum of 300 mm of straight duct shall be installed between any two increases
or connectors.
.10
Connections shall be made at a 30-degree angle.
.11
Provide dead end caps within 150 mm of the end of each main.
.12
Each branch line shall have a blast gate type of balance damper with locking pins.
Blast gates shall be installed within one meter of the main duct connection and shall
be on the horizontal section of the duct with the gate opening in the vertical position.
Blast gates shall be locked in a permanent manner after balancing.
.13
Install cleanouts at low points where accumulation may cause blockage. Cleanout
doors shall be slide types with lock. Where the duct may be readily removed from
the equipment served, the cleanout may be omitted. Cleanout doors shall be
installed at each change in direction in the main ducts and generally at 3 meters on
centre.
.14
All plenums, hoods and the like shall be constructed of galvanized iron two gauge
heavier than the connecting duct unless specifically noted otherwise.
.15
Collector - The dust collector shall be high efficiency bag type with the following
features and capacities.
.1
l/s (cfm) at 00 mm (inches) w.c. total static pressure (includes filter
residual).
.2
Blower assembly, ( ) kW (hp) totally enclosed motor, and drives.
.3
Automatic shaker and control centre.
.4
Complete filter assembly, filters and one spare filter cartridge.
.5
Barrel adapters and barrels (one barrel for each connection).
.6
Stand extension for barrels.
.7
Explosion vent.
.8
Plenum silencer.
.9
Totally enclosed motor.
.10
External belt drives as required.
.11
This unit shall be an AAF ( ) Arrestall unit or approved equal.
2.15
FABRIC DUCT
.1
Fabric duct shall be half-round fabric ducting with a sewn-in bottom in one end and open
the other end for connection to steel ductwork with stainless steel snapband.
.2
Manufacturer shall supply a fabric transition to go from 200mm (8”) diameter sheet metal
to the D-200 (8”) half-round fabric.
.3
Maximum outlet speed of each individual duct is 0.12 m/s.
.4
Fabric duct shall comply with UL25/50 Flame spread/smoke requirements of NFPA 90-A
and shall be UL rated.
February 27, 2015
University of Manitoba
Req #
Section 15800
Page 10
.5
.6
.7
.8
.9
.10
.11
2.16
AIR DISTRIBUTION
Fabric duct shall be made of 100% flame retardant non-coated permeable polyester.
Fabric weight shall be minimum 300 g/m 2.
Operating design temperature shall be at least 0°F to 180°F.
Operating design pressure shall be minimum 66 Pa ESP and maximum 100 Pa ESP.
Fabric duct shall come with an aluminium Wing-rail suspension system.
Ducts shall connect together using concealed zippers designed for easy disassembly and
maintenance.
Colour shall be manufacturer’s standard colour 9002 White.
FAN POWERED TERMINALS
.1
Provide, as shown on drawings and specified in Equipment Schedules, normally open direct
acting pressure independent constant volume, parallel fan powered terminals with variable
primary air volume. Terminals as manufactured by E.H. Price (Series FDV 5000).
Equivalent fan powered terminals as manufactured by Enviro-Tec, Tuttle & Bailey, Titus or
Nailor Industries will be accepted.
Provide all required modifications to primary air inlet duct geometry to suit particular unit
installed.
.2
Factory mounted terminal unit controllers and damper actuators are specified in Section
15900.
.3
Mounting responsibility: terminal unit Manufacturer to take delivery of and install components
supplied by Section 15900 Subtrade.
.4
All required mounting and wiring of terminal unit components supplied by Section 15900
Subtrade to be provided by terminal unit Manufacturer. Terminal unit Manufacturer to
provide fan relay and power transformer.
.5
Provide sound data (NC levels) for both transmitted and radiated noise for pressures ranging
up to 4” w.g. All terminal units to be selected and attenuated for NC30 or less.
.6
The assembly casing to be constructed as follows:
.1
22 ga. casing (zinc coated steel construction) with integral turned-in flanges to
capture exposed edges of insulation on return air plenum inlet;
.2
Removable bottom access panel to access the interior of the unit for motor servicing
and removal, cleaning and inspection.
.3
Casing: fully lined with 20mm (3/4”) dual density insulation (which complies with
UL181 and NFPA90A) and faced with aluminum foil/reinforced Kraft vapour and air
barrier.
.4
Metal filter frame: on plenum opening to fan compartment. Filters to be 25mm (1”)
thick disposable media in permanent reusable metal frames.
.7
Airflow sensor: provided by terminal unit Manufacturer, of a multi-point, multi-axis flow ring
or cross sensor having a minimum of twelve pickup points designed to average the airflow
across the inlet of the assembly. Single point or flow bar sensors are not acceptable.
Sensor, mounted at 1.5 duct diameters straight duct upstream of unit, to maintain airflow to
within  5% of rated unit airflow setpoint
.8
Controller to operate the electric damper actuator through full-catalogued air volume range
without changing orifices or other parts.
.9
Air distribution assembly to be designed, installed and field adjusted, if necessary, to
maintain controlled pressure independent airflow. For optimum performance, installed units
to be provided with a minimum of four duct diameters of straight inlet duct, same size as the
inlet, between the inlet and any takeoff, transition or fitting. Also to be provided:
.1
External taps for air balancing instruments.
.2
Adjustable flow settings at the controller.
.10
Terminal units to be factory set to 50% minimum air flow position unless noted otherwise on
drawings. This percentage to be field adjustable.
.11
All primary control components to be mounted inside a protective metal shroud.
.12
Damper to be 18 gauge metal minimum, with peripheral gasket, pivoted in self-lubricating
bearings. In fully closed position, air leakage past the closed damper not to exceed 2% of
the nominal catalogue rating at 3” inlet static pressure, as rated by Air Diffusion Council test
procedures.
February 27, 2015
University of Manitoba
Req #
Section 15800
Page 11
.13
.14
.15
.16
.17
2.17
AIR DISTRIBUTION
Fans to be forward curved centrifugal type, with direct drive 110V split capacitor type motors.
Unit to be provided with a manual solid state speed controller for adjustment of fan speed.
Fan and motor assembly to be internally suspended and isolated from the casing on rubberin-shear isolators. All motors to be permanently lubricated. Access to be provided through a
removable access panel in the bottom panel of the fan terminal assembly.
All fan controls to be enclosed in a single control box with an access panel mounted on the
side of assembly. All controls to be sealed from primary airflow.
Unit to be CSA certified.
Unit Manufacturer to provide unit mounted electrical disconnect switch.
Fan powered terminal controllers to have features and capabilities as specified in Section
15900.
FILTER SECTIONS
.1
All air systems shall be provided with filter sections to clean the air and protect system
components.
.2
Filter installations shall include prefilters to keep system components clean and final
filters for supply air systems to ensure ventilation air cleanliness.
.3
Filters rows shall have separate holding frames with side access properly sized in
accordance with the filter Manufacturer's guidelines. Installation shall permit easy
removal of all filters for filter replacement.
.4
Each prefilter and final filter bank shall be provided with an individual Dwyer 2000
magnehelic filter differential pressure gauge (this will require 2 gauges) each with ‘clean’
and ‘loaded’ setpoints clearly marked.
.5
Multiple filter sections shall be provided with manufactured I-channels between horizontal
filters for airtight installation.
.6
Prefilter: 150mm (6") to 300mm (12”) thick disposable-type filter acceptable to the
University of Manitoba. At minimum, prefilters shall meet MERV 11 (Minimum Efficiency
Reporting Value) performance level of 60%-65% dust spot and 90% arrestance rated to
ASHRAE L-11.
.7
Final filters: 300mm (12”) thick disposable-type acceptable to the University of Manitoba.
At minimum, final filters shall meet MERV 13 performance level of 80%-90% dust spot
and 98% arrestance rated to ASHRAE H-13.
.8
HEPA filters are to be high capacity gasket seal and 99.97% efficient. Provide 16-gauge
galvanized steel holding frame complete with clamps.
.9
Maximum face velocity for any filter bank to be 2.5 m/s (500 fpm).
.10
For face access filters, provide holding frame: Factory fabricated 16 ga. galvanized steel
with gaskets and four spring type positive sealing fasteners per unit. Fasteners to be
attachable and removable without use of tools.
.11
For slide-out filter removal and replacement, provide a hinged (continuous piano hinge)
and cam latched access door of sufficient size to allow easy withdrawal and replacement
of filters. Provide access door where there is adequate space to service filters.
.12
Provide filter banks for duct-mounted coils outside of air units (heat reclaim, etc.)
consisting of framed units field assembled. Note: reheat coils do not require filters.
.1
Filters: 50mm (2") thick disposable MERV7 prefilters acceptable to the University
of Manitoba.
.2
Max. Face Velocity 2.54 m/s (500 ft. /min.).
.3
Holding Frame: 16 ga. galvanized steel channels for slide - out operation.
.4
Provide access doors upstream and downstream of coil/filter installation - refer to
detail drawings.
.5
For filter removal and replacement, provide a hinged (continuous piano hinge)
and cam latched access door of sufficient size to allow easy withdrawal and
replacement of filters.
.13
Provide filter banks for ventilation air intakes for electrical rooms and similar installations
such as elevator, generator, transformer rooms, etc. to ensure a clean air supply to the
room. Installation shall consist of framed units field assembled.
.1
Filters: 50mm (2") thick disposable prefilters acceptable to the University of
February 27, 2015
University of Manitoba
Req #
AIR DISTRIBUTION
Section 15800
Page 12
.2
.3
Manitoba.
Maximum face velocity 2.54 m/s (500 ft. /min.).
For face access filters, provide holding frame: Factory fabricated 16 gauge
galvanized steel with gaskets and four spring type positive sealing fasteners per
filter - fasteners to be attachable and removable without use of tools.
2.18
FILTER GAUGES
.1
Provide individual magnehelic differential pressure gauges across each prefilter, each filter
and each final filter bank installation on this project (one gauge per bank).
.2
Gauges to be equal to Dwyer Series 2000 115mm (4½“) face diameter with suitable range –
typically 0 to 2" (0 to 50 mm)
.3
Magnehelic gauge to be provided with air filter gauge accessory fittings.
.4
Filter “clean” and “loaded” pressure points to be indicated on the magnehelic to indicate
clean condition as well as when filters should be changed.
.5
Differential pressure gauges using liquids are not permitted on this project.
2.19
FIRE DAMPERS AND FIRE STOP FLAPS
.1
Provide ULC labelled and listed type "B" or "C" gravity or spring type dampers. Use type
"A" only where mounted directly behind supply or return grilles.
.2
Provide fire dampers in sizes and in arrangements to suit openings shown on the
drawings to ULC requirements as they relate to maximum sizes permissible in the
applicable fire separation construction. Where installed in metal studs walls, comply with
ULC requirements and advise other affected Trades i.e. stud and drywall installers.
.3
Do not use asbestos in any fire damper.
.4
CK2000 thermal blanket along with required transitions shall be used for all ceiling
diffuser protection.
2.20
FIRE/SMOKE DAMPERS
.1
Provide where shown on the drawings and where required to maintain separations,
combination fire/smoke dampers meeting ULC/UL, NBC and NFA requirements. All
damper units to be equipped with linkages for mounting of actuators for smoke control
operation, fusible links for fire damper mode and micro switches for status signal (open
and closed). Provide all required electric actuators.
.2
Coordinate electrical requirements with Division 16.
2.21
FLEXIBLE CONNECTIONS
.1
General HVAC System: provide at connections to fans and at air handling units,
neoprene coated glass fabric, factory fabricated, flexible connections, as approved by
Authorities and the University of Manitoba.
.2
Except where noted, otherwise connections up to 750 mm (30") in the largest dimension
shall be 100 mm (4"). Connections larger than 750 mm (30") to be 150 mm (6").
2.22
FUME EXTRACTOR ARM
.1
Partial stainless steel extractor arm with two 125mm (5”) diameter stainless steel tubes,
three 125mm (5”) flexible polyethylene hoses, 4m (14”) working radius, 300mm (12”)
diameter stainless steel hood with handle and external support. Provide epoxy coated 2.2m
(7.2”) floor stanchion and 1.2m (4’) extension arm.
.2
Design based on PlymoVent MultiSmart Arm MSAS-125-4, SAES-125-4 extension and PA220 floor stanchion.
2.23
FUME HOOD EXHAUST SYSTEMS
.1
Specific requirements for laboratory and industrial exhaust systems shall be reviewed
with the Consultant and the University Environmental Health and Safety Office.
.2
Fume hood exhaust systems shall be designed in accordance with the latest editions of
American Conference of Governmental Industrial Hygienists (ACGIH) and ANSI
Laboratory Exhaust Standards Z9.5 and Z316.5, and the University of Manitoba
February 27, 2015
University of Manitoba
Req #
AIR DISTRIBUTION
Section 15800
Page 13
.3
.4
.5
.6
.7
.8
.9
.10
.11
.12
.13
.14
.15
.16
.17
Controlled Products Standard (CPS).
All systems shall have an adequate supply of make-up air tempered to room
temperature. Maintain laboratory negative pressure relative to adjacent corridor using
volume tracking technique complete with static pressure reset. Measure supply and
exhaust volumes. Maintain supply volume suitably less than exhaust volume to maintain
laboratory static pressure of - 0.05” W.C. relative to adjacent corridor. Temperature
control of the space shall not depend on exhaust air bypass through the hood.
A specialized hood, exhaust duct wash-down and duct system shall be provided where
Perchloric acid of concentration higher than 72% is used or heating, evaporation or
digestion of Perchloric acid is performed. Hoods should be located as close to the
outside of the building as possible and have stainless steel fans. The dedicated duct
system shall have few, if any, horizontal runs and no dead areas that can capture and
condense Perchloric acid. Refer to University of Manitoba document “Safety
Requirements For Perchloric Acid Fume Hoods" - April 4, 2003. Perchloric acid hoods
shall be constructed of stainless steel (Type 316) and have welded seams throughout.
No taped seams or joints and no putties or sealers can be used in the fabrication of the
entire hood and duct systems.
Fume hood exhaust fans shall have acid-resistant coating; two coats air-dried "Heresite"
or equal. Design static shall not be less than 1-in. static pressure. Spark resistance is
required for explosive atmospheres. Where design conditions do not permit the use of
coatings, requirements shall be discussed with the Consultant.
Exhaust fans serving fume hoods shall be located at the discharge end of the system to
minimize the amount of positively pressurized ductwork.
Exhaust fans shall discharge at a sufficient height above the roof level to provide safe
discharge and dilution of hazardous chemicals, as outlined in "Airflow Around Buildings,"
in the latest edition of the ASHRAE Fundamentals Handbook. Exit velocity shall be 3,000
fpm (minimum).
Duct systems and fans serving hoods used with combustible materials shall be of sparkproof construction and shall not be PVC coated. The exhaust ducting shall be grounded
to dissipate any static electricity. Fume hood exhaust ductwork shall be Type 316
stainless steel with welded joints.
Hoods, fans, and discharges shall be tagged for type of service and fume hoods shall be
tagged with a fan service tag.
Exhaust fans and ductwork handling toxic fumes and/or radioisotopes shall have an
appropriate self-adhering CAUTION sticker attached. For hoods where radioisotopes are
used, extra labeling requirements as stated in the CPS shall be complied with.
All laboratory hoods and safety cabinets shall be equipped with visual and audible alarms
to warn laboratory workers of unsafe airflows.
Controls and dampers shall be of a type that, in the event of failure, will fail open to
assure continuous draft.
In accordance with NFPA Standard 45, automatic fire dampers shall not be used in
laboratory hood exhaust systems. Fire detection and alarm systems shall not be
interlocked to automatically shut down laboratory hood exhaust fans.
Auxiliary air supply and ductless laboratory fume hoods shall not be used.
All fume hood and local exhaust system ducts shall be constructed of round ductwork
with interior of all ducts smooth and free of obstructions.
All fume hoods, except for radioactive and Perchloric acid fume hoods, shall be
connected to a central exhaust manifold. The exhaust manifold, exhaust fans, and
bypass damper shall be located above the roof. The system shall be exhausted via
multiple exhaust fans and provide for redundancy. The fans shall be staged to maintain
suitable negative pressures in the manifold. The bypass damper shall automatically
modulate to maintain duct static pressure setpoint.
Alarm lights and horns shall provide local alarm annunciation upon loss of negative
system pressure. Independent Dwyer Photohelic pressure switches shall monitor duct
pressure at multiple locations and provide remote alarm annunciation to Campus Security
Central Station.
February 27, 2015
University of Manitoba
Req #
AIR DISTRIBUTION
Section 15800
Page 14
2.24
FUME HOODS
.1
New laboratory fume hoods shall be standard products from a Manufacturer acceptable
to the laboratory / Physical Plant / EHSO. All laboratory fume hood designs must
demonstrate containment of tracer gas less than 4.0 AM 0.05 according to ASHRAE Test
Standard 110-1995.
.2
Laboratory fume hoods shall be a constant volume design of the size and with the
accessories as noted below and on the drawings.
.3
Exhaust duct connection collar to be 316 stainless steel to allow unit to be connected to
316 stainless steel exhaust system
.4
Maximum hood pressure drop from inlet to discharge collar shall not exceed 0.10"wg.
.5
Operating face velocities of fume hoods shall conform to the levels stated in the
University of Manitoba CPS. Operating face velocity of a fume hood shall be a minimum
of 80 feet per minute (fpm) and a maximum of 120 fpm at a sash height of 11 inches.
.6
Laboratory hood performance controls and alarms shall be factory installed and field
calibrated. Alarm points to be set at 65 linear feet per minute (LFPM) and 125 LFPM.
Alarms must warn users of potential fume spillage before the event. Warning after the
event is not acceptable.
.7
Unless specifically requested otherwise by a user, the laboratory fume hoods shall have
transparent, movable, vertical-rising sashes constructed of shatter resistant and flame
resistant material, and be capable of closing the entire front face.
.8
Proper operation of laboratory fume hoods shall be demonstrated by an independent
qualified test contractor prior to project closeout. Test results shall be forwarded to
EHSO. Proper operation includes acceptable face velocities at operational sash height in
compliance with the University of Manitoba CPS.
.9
Laboratory fume hood controls shall automatically modulate internal baffles to establish
and maintain a bi-stable vortex within the hood. Controls to be variable face velocity
(VFV) system complete with local hood alert module, vortex pressure sensor, stand-alone
automatic baffle position controller, damper actuator, air flow sensor, and linear trim
balancing/shut-off damper. For Flow Safe, Air Sentry type fume hoods, interior
dimensions and vortex chamber to be sized to generate and support a bi-stable vortex.
.10
Laboratory fume hoods connected to manifold exhaust systems shall be provided with
volume control systems. Refer to Section 15900 for further control details.
2.25
HIGH PRESSURE DUCTWORK
.1
Round Ductwork
.1
Sizes up to 900mm (36”) to be zinc-coated steel strip, spiral conduit or round.
.2
Construct spiral sizes:
.1
Up to 200mm (8”) of 0.50mm (#26 ga.) with ribs spaced 65mm (2 ½”) to
100mm (4”) apart.
.2
Sizes from 225mm (9”) to 600mm (24”) to be of 0.60mm (#24 ga.) with
ribs spaces 150mm (6”) apart.
.3
Sizes 650mm (26”) to 900mm (36”) of 0.80mm (#22 ga.) with ribs spaced
150mm (6”) apart.
.3
Round duct to have grooved longitudinal seams with continuous weld.
.4
Sections to be joined by 200mm (8”) coupling sleeves.
.5
Fittings to be manufactured by United. All tees shall be conical.
.6
Balancing dampers, where noted and where required for balancing, to be
butterfly-type with Duro-Dyne heavy-duty hardware. Damper blades to be 1.2mm
(18ga.) perforated plate.
.7
Construct spiral sizes:
Diameter
Gauge (USSG)
Up to 10”
24
11” to 20”
22
21” to 40”
20
41” to 60”
18
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Section 15800
Req #
Page 15
61” and over
16
2.26
HIGH PRESSURE VARIABLE VOLUME BOXES
.1
E.H. Price SHVR, single duct, variable volume air distribution assemblies of sizes and
capacities shown, with performance as per Catalogue F-1, latest issue.
.2
Box housing constructed of galvanized steel.
Sealed and gasketed, leakproof
construction. Damper shall operate in rustproof Delrin, self-lubricating bearings. Damper
leakage shall not excess 3% at 1,495 Pa (6" S.P.), as rated by Air Diffusion Council
standards. External mounted controller and operator shall be covered by galvanized
shroud to protect from damage and vandalism. Inner valve casing shall have 25mm
insulation, complying with U.L. 181 and NFPA 90A.
.3
Each assembly shall be pressure independent; i.e., it shall provide air flow regulation
within +/-.25m/s (50 fpm), regardless of duct pressure fluctuation, throughout its entire
rated cfm range. Each assembly shall reset to any air flow between zero and maximum
noted cfm. Assembly shall operate independent of duct pressure over a range of 75 Pa
(0.3" W.G.) To 1,495 Pa (6" W.G.).
.4
At an inlet velocity of 10.2m/s (2000 fpm) differential static pressure for any size shall not
exceed 62 Pa (0.25") wg for basic assembly, or 137 Pa (0.55") with sound attenuator
added.
.5
Sound ratings shall not exceed ratings in catalogue.
.6
All variable volume boxes shall have factory pre-set minimum position, but shall be
capable of being field adjusted. Boxes shall be set for normally minimum operation and
calibrated to deliver specified maximum cfm in response to proportioning thermostat.
.7
Summer and winter min. positions shall be factory pre-set as noted on Variable Volume
Box Schedule.
.8
Air volume shall remain constant regardless of static pressure variations. Refer to C1.
“Initial Balance of Operation of Air Systems”.
.9
Section 15900 to supply controller, air flow sensor, reheat E/P transducer to factory for
mounting.
.10
Electric actuator furnished by Section 15900 and factory mounted by VAV Manufacturer.
.11
Room thermostat and CO2 sensor provided by Section 15900.
.12
Section 15900 to supply On/Off Reheat Interface, factory installed to terminal unit where
indicated on schedule.
.13
Manufacturer shall co-operate with Section 15900 to ensure all control sequences of
operation, min. and maximum settings are compatible, and all necessary components are
provided to ensure proper operation of all assemblies.
.14
Refer to Variable Volume Box Schedule and Section 15900 for further requirements.
2.27
KITCHEN EXHAUST FANS
.1
Provide fans to meet NFPA and ULC requirements complete with NFPA and ULC approved
roof curbs.
.2
Supply and install non-overloading type centrifugal up blast exhaust fan with steel or
aluminum enclosure, back draft damper, pulleys, belts and motor.
.3
Fan discharge shall be 1000 mm (40") above roof.
.4
Supply and install centrifugal backward curve SISW fan with weatherproof motor and drive
enclosure, motor, drives, belts, and BDD cleanout door and drain to discharge 0000 cfm at
000 s.p. when driven by a 0000 Hp motor.
.5
Standard of Acceptance: Chicago Blower belted vent set model (
) or (
) approved
equal.
2.28
LOUVRES
.1
Supply and install aluminum louvres.
.2
Louvres shall be 100 mm (4") deep with 30-degree blades at 75 mm (3") o/c. and
constructed of 12 gauge material and 16 gauge frame.
.3
Provide 12 mm (½") square 16 gauge aluminum removable bird screen with 50%
minimum free area.
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Req #
Section 15800
Page 16
.4
.5
Provide sill or frame as required.
Louvres shall be equal to Aerolite Model K630X.
2.29
PLENUMS AND CASINGS
.1
All apparatus sheet metal connections, plenum chambers and casings above 400mm
(16") in height, or air handling unit casings: 18 gauge galvanized steel reinforced with
40mm x 40mm x 5mm (12" x 12" x 3/16") galvanized angle. [Galvanized fluted 0.76mm
(.03") thick roof decking with a 38mm (12") deep and 142mm (5.6") wide ribs
spaced at a 203mm (8") oc may also be used.] [See detail drawings.]
.2
Internal Insulation of air handling casings as specified in Section 15180.
.3
Refer to detail drawings regarding air handling unit plenum access doors, drip trays and
coil mounting, construction details.
.4
Special prefabricated enclosures: Provide in the configurations and dimensions shown on
the drawings, built-up system enclosures constructed of prefabricated acoustic panels
complete with access doors:
.1
Panels: 100mm (4") nominal thickness consisting of 72 kg/m; (4.5 lbs/ft;) density
insulation packed between 18 ga. galvanized steel outer shell and 22 ga.
galvanized perforated steel inner shell, reinforced by 10 ga. galvanized steel
channels spot welded or riveted in place. Panel joints: Interlocking tongue and
groove design. Trim angles: 16 ga. galvanized steel.
.2
Doors: 600mm x 1500mm (24" x 60") located as shown on the drawings
constructed in the same manner as the panels except with solid sheets both
sides, and complete with two butt hinges, two camlocking latches operable from
inside and outside and single air seal. Door action: To swing open against
plenum pressure.
2.30
REGISTERS, GRILLES, DIFFUSERS
.1
Ensure that the items supplied will be compatible with ceiling, floor, or wall construction.
.2
Provide fire dampers where required to maintain fire separations and where indicated on the
drawings. Fire dampers behind sidewall and floor grilles and registers to be VCS4/C, U.L.C.
/W.H. rated for 1½ hours with screwdriver balance adjustment. Such dampers to replace
standard balance dampers where specified.
.3
Air extractors to be provided where indicated and where supply outlets are directly
connected to ductwork serving multiple outlets: Extractors to be equal to:
.1
Rectangular - AE-1
.2
Round - VCR-6
.4
Borders and/or frames to have countersunk screw holes. Slot or Phillips head countersunk
#8 sheet metal screws with finish to match border.
.5
Supply, Return, Transfer, and Exhaust, grilles, registers and diffusers to be as follows:
.1
Lay-in supply air diffusers.
.1
PDS (PDHS for dropped lay-in tile ceiling) with 4-way adjustable pattern,
24" x 24" ceiling module unless noted otherwise, and style 3 frame (4 for
spline ceiling) with B-13 off-white finish.
.2
Flush supply diffusers.
.3
PDS/1, 4 way adjustable with diagonal grid placement unless noted
otherwise; ceiling module to be twice each size shown; B-13 off-white
finish.
.2
Sidewall supply registers.
.1
C22S3AB15, ¾" double deflecting with short vanes in front, balance
dampers, screw mounted and aluminum finish.
.3
Floor linear supply registers.
.1
LBPH 15A3-4370-B-CC-66; fine line linear with 0° deflection, ¼" spring,
balance damper, 1¼" x 2" heavy-duty ledged floor frame, clip fastened, with
aluminum finish.
.4
Ceiling return and transfer air grilles.
.1
C80 A B15; curved face border with ½" x ½" x ½" 0° deflection core screw
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Req #
Section 15800
Page 17
fastened in aluminum finish for all non-ceiling module sizes.
For ceiling module sizes (e.g. 24 x 24) provide CH 80 B15 for lay-in
application.
Sidewall and ceiling return air and transfer air grilles (standard duty).
.1
C70 LA B15 curved face border, 45° deflection, ½" spaced ¾" blades in
short dimension, screw fastened, aluminum finish.
Gymnasium Heavy Duty Sidewall Return Air Grilles where any portion of the grille is
within 8' - 0" of the floor.
.1
GG91 L/S A B15 curved face border, 45° deflection, _" spaced ½" blades in
short dimension, screw fastened, aluminum finish. Blades to be horizontal.
Sill return or transfer grilles.
.1
LBPH 15A-275-A-B-15; same as supply but less the damper.
Floor return or transfer grilles.
.1
LBPH 15A-4370-B-B15; same as supply but less the damper.
Exhaust registers.
.1
Exhaust registers to be the same as return air grilles but fitted with a
damper.
Door grilles.
.1
STG 1BF B15; stamped steel with screwed frame both sides adjustable
from 1_" to 2½" with ½" inverted V sight proof horizontal fixed blades in
aluminum finish.
Filter grilles.
.1
FF 70 L GQ B15; filter grille with flat face aluminum border, 45° deflection
½" spaced ¾" fixed bars in long dimension, 1" filter frame, quick release
fasteners (hinged in sized under 36" x 24", and aluminum finish). Provide
1" thick oil impregnated filter media. Back grille where indicated to be C70L
transfer grille.
.2
.5
.6
.7
.8
.9
.10
.11
2.31
ROOF AND SIDEWALL EXHAUST FANS
.1
Centrifugal fan units, V belt or direct driven, with spun aluminium housings, complete with
resilient mounted motor and fan, 12mm (½") mesh aluminium birdscreen, automatic
gasketted backdraft dampers: disconnect switch within fan housing, continuous curb
gaskets, stainless steel securing bolts and screws.
2.32
ROOF EXHAUST FANS
.1
Provide fans with heavy gauge enamelled steel enclosures, DIDW forward curve fan wheel
with permanently lubricated bearings, hinged or bolt on (wing nuts) covers, for placement on
fabricated roof curb.
.2
Fans to have variable motor pulley, fan pulley, belts and motor on resilient adjustable mount.
2.33
ROOF MOUNTED LOUVRED ASSEMBLIES
.1
As described on the drawings, provide rainproof roof mounted louvred aluminium alloy
exhaust and intake assemblies complete with bird screens.
2.34
SILENCERS
.1
Only silencers with duct-to-reverberant room insertion ratings will be accepted.
.2
Construction: 22 ga. galvanized steel outer shell, all welded, prefabricated, with 40 kg/m³
(2½ lb. /ft³) density acoustic media packed under 10% compression and protected from air
erosion by 22 ga. perforated galvanized steel liner, stream lined inlets and tapered diffuser
outlets for maximum insertion loss and minimum pressure drop.
2.35
SPLITTER AND QUADRANT DAMPERS
.1
Dampers shall be installed in all branch ducts for balancing. All balancing shall be done
with branch duct dampers and NOT with diffuser dampers.
.2
Ducts whose smallest dimension is 200mm (8”) or greater shall have multi-leaf opposed
blade volume dampers with manual quadrants calibrated to show the position of the
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University of Manitoba
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AIR DISTRIBUTION
Section 15800
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.3
.4
.5
damper. Damper blade widths shall not exceed 150mm (6”). Quadrants shall be oriented
so that the handle is parallel to the direction of air flow, when the damper is wide open.
Construct quadrant dampers of not less than 22 gauge material. Where installed in ducts
up to 300mm (12") deep, provide single blade, and in ducts greater than 300mm (12")
provide multi-blade with linkages, each blade being not wider than 225mm (9").
Do not locate single blade volume dampers immediately behind diffusers and grilles.
This application does not allow uniform airflow across the outlet face.
To minimize generated duct noise, locate volume dampers at least two duct diameters
from a fitting and as far away as possible from the outlet or inlet.
2.36
UTILITY FANS
.1
Fans shall be SISW design with F.C. wheel, constructed of heavy gauge steel with
enamelled finish, pulleys, belts, and motor on resilient adjustable mount. Motor pulley to be
variable type.
.2
Provide spring mounts and support fans at 4 points from structure.
.3
Provide belt guards. Field fabricate if necessary.
2.37
VANEAXIAL FANS
.1
Provide belt, direct driven or direct driven variable pitch in motion as indicated on the
drawings and described in the equipment schedules, statically and dynamically balanced
to maximum tolerance of 1 mil double amplitude at design operating speed and rated per
AMCA Standard 210-74.
.2
Housing: Hot rolled steel with integral flanges 4.76mm (3/16") thick for fans up to 965mm
(38") ID; 6.4mm (3") for fans 1067mm (42") ID and larger; continuously welded,
mechanically expanded concentric, sandblasted and painted all sides, minimum of eight
4.76mm (3/16") thick stationary guide vanes and 12.7mm (2") thick steel motor support
plate welded to housing.
.3
Rotor hub and blades: Cast aluminium; 356-T6 alloy heat treated for hub and 356 alloy
for airfoil blades with tip clearance of 1.27mm (0.050") for rotors up to 900mm (36") and
not exceeding 4.57mm (0.180") for larger sizes.
.4
Motors: With 200,000 hour ball bearings; Class B insulation for operation in 400C
ambient; extended lubrication fittings, NEMA Standard TEFC suitable for vertical and
angular position; conduit box with air tight conduit on direct drive units.
.5
Supports: For horizontal or angular mounting; steel angles located on centre line of fan
housing.
.6
Capacity adjustments where specified as constant volume: Blades to be adjustable to
factory stamped graduations. Where specified variable volume; automatically controlled
infinitely variable through design pitch range with minimum hysteresis, individual holding
bearings for blades designed to not require periodic relubrication. Actuator; internal
factory mounted and connected pneumatic with positioner; to operate on 550 kPa (80
psig) air pressure and 20 to 103 kPa (3 to 15 psig) control pressure.
.7
Provide as indicated in equipment schedules: inlet bells, outlet or inlet cones and
companion flanges. In plenum applications, fans to have inlet cone and screen.
.8
Provide, to current AMCA Standards, performance curves and sound power level data
(PWL) re 10-12 watts for each of the 8 octave bands.
.9
Provide factory mounted and calibrated annubar or acceptable alternative velocity
pressure sensors mounted in the fan inlet. Submit velocity pressure curves with shop
drawings.
.10
See fan chart and drawings for operating characteristics and any deviations from the above.
2.38
VARIABLE AIR VOLUME TERMINALS
.1
Provide as shown on the drawings and as detailed in the equipment schedules, [normally
closed] [direct] [reverse] acting [by-pass type and] pressure independent variable [and
constant] volume terminals.
.2
Provide as shown on the drawings and as detailed in the equipment schedules, [normally
closed] [direct] [reverse] acting [by-pass type and] pressure independent variable [and
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Req #
Section 15800
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.3
.4
.5
.6
.7
.8
.9
constant] volume terminals.
Provide control arrangement such that field adjustment of maximum and minimum air
flow and field selection of normally closed or normally open mode is easily achieved.
Provide [pneumatic] [electric] actuators compatible with the characteristics of the central
temperature control system. [Maximum control air requirement not to exceed .009 l/s at
138 kPa (.02 cfm at 20 psi)].
Provide sound data (NC levels) for both transmitted and radiated noise for pressures
ranging up to 1.0 kPa (4" wg). Discharge and radiated sound ratings not to exceed room
noise rating as listed.
Provide sound attenuators on all VAV Terminals.
Interior lining is to be constructed of impermeable, cleanable, closed-cell liner materials
such as Armacell or IMCOA EPFI ImcoSheet. Face-coated fiberglass insulation is not an
acceptable product for any portion of ventilation systems including VAV boxes and
attenuators.
Provide reheat coils with access doors on both upstream and downstream side of coil.
Where terminals are designated "CAV", provide normally closed (100% shut-off) as
above except set at constant volume as indicated.
PART 3 - EXECUTION
3.1
ACCESS DOORS
.1
Refer to Section 15050 for requirements for access doors.
3.2
AIR BALANCING
.1
Refer to Section 15990 – Testing and Balancing.
.2
Provide personnel and materials to assist and work under direction of air balancing firm
for removal and replacement of ceiling tiles, installation of pilot tube test opening
enclosures, installation of dampers and baffles as required for specified air balance and
elimination of stratification, provision of access openings and covers, provision of ladders
and scaffolds, removal and replacement of guards, removal and replacement and
provision of required sheave and belt sizes as directed and other items as necessary for
complete and acceptable air balancing procedures.
3.3
AIR TO AIR HEAT EXCHANGERS
.1
The installation of the air-to-air heat exchangers must be executed with particular care.
.2
The following are items of concern:
.3
The exhaust air must enter the bottom part.
.4
The drain must be at the warm end on the exhaust side.
.1
The unit must be graded 2% minimum and preferably 4% back to the drain end.
.2
All joints and connections must be made watertight.
.3
The ductwork on the exhaust air leaving side must be watertight.
.4
The insulation must be applied carefully ensuring continuity of the vapour seal.
.5
The condensate drain is to be insulated and vapour sealed.
.6
The trap in the condensate drain shall be 150 mm (6”) deep.
.7
Access doors must be double panel-insulated type carefully sealed.
.8
Where hangers or support members come in contract with the exchanger they shall
be insulated to a point 300mm (12”) from the contact point.
.9
Dented or damaged units will not be accepted.
.10
All duct connections shall slope up from the heat exchanger.
.11
Where the Manufacturer's installation instructions differ with that stated, such
instructions shall be brought to the attention of the Consultant.
3.01
BAFFLES
.1
.1
Provide baffles where required to reduce problems of air stratification, as directed by
the Consultant.
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University of Manitoba
AIR DISTRIBUTION
Section 15800
Req #
Page 20
3.02
DUCT INSTALLATION
.1
Install ductwork in accordance with SMACNA Duct Construction Standards - Metal and
Flexible.
.2
Do not suspend equipment, ductwork or devices from formed hollow metal decking.
.3
Install balancing dampers at branch ducts.
.4
Vibration isolation shall be provided for the following:
.1
Vibration isolation shall be provided where there are flexible connections
between equipment and ductwork.
.2
All high-pressure ducts (over 6 in. WC), for 20 ft from air handling equipment
mounted on vibration isolators.
.5
Flexible ductwork: Maximum installed length: One continuous length at 1500 mm (5'-0").
Use standard sheetmetal elbows at drop points to outlets.
.6
Seal all transverse joints in supply, return and exhaust ductwork with Ductbond waterbased high velocity duct sealer or equivalent meeting requirements of Authorities having
jurisdiction and SMACNA Seal Class C - maximum leakage 5%. Above sealer not
required in Nexus type joints except as may be specified in Manufacturers installation
instructions.
.7
Where interior of duct is visible through grilles, registers or diffusers, paint interior of duct
with flat black Tremco paint formulated for galvanized surfaces.
.8
Seal all exposed edges, perforations and joints in acoustic duct lining with Bakelite
110-26 compound or high velocity duct sealer meeting Manufacturer’s requirements.
.9
Use Bakelite 230-38 adhesive, full coverage, for internal insulation.
.10
Ductwork installed outdoors (not externally insulated): Seal all joints with paintable Silicon
caulking compound.
.11
Provide spin-on connections c/w dampers at each boot or plenum supplying integrated
ceiling air supply outlets.
.12
Hangers: Galvanized steel strap and steel angle with support rods, locking nuts and
washers to the following table:
Circular Duct Size (mm)*
Angle Size (mm)
.1
Up to 600 (24") galvanized steel strap
25 x 20 ga. (1" x 20 ga.)
.2
625 to 1000 (25" to 40")
40 x 40 x 3 (1½ " x 1½ " x 1/8")
.3
1005 to 1500 (41" to 60")
40 x 40 x 3 (1½" x 1 ½“ x 1/8")
.4
1505 to 2000 (61" to 80")
50 x 50 x 3 (2" x 2" x 1/8")
Rod Size (mm)
Spacing (mm)
.1
6 (1/4")
3000 (10')
.2
6 (1/4")
3000 (10')
.3
10 (3/8")
3000 (10')
.4
10 (3/8")
2300 (7' 6")
* Equivalent Rectangular Maximum Dimension
1.6
FANS
.1
.2
.3
.4
.5
Ensure vibration free installation.
Leave access for servicing.
Install belt guards and weatherproof covers as required.
On all vane axial fans, (mounted vertically or horizontally), provide steel support brackets
from floor or overhead with vibration isolators at centreline supports on fan - Do not place
isolators on floor or at overhead attachment point.
Secure snubbers to be parallel with the fan horizontal longitudinal axis.
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University of Manitoba
AIR DISTRIBUTION
Req #
Section 15800
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1.7
FILTER GAUGES
.1
Locate sensing points as directed by the Manufacturer.
.2
Carefully clip tubing to avoid damage and interference with filter removal or servicing.
.3
Mount gauges on the unit for convenient observation as directed by the Consultant.
1.8
FIRE DAMPERS AND CEILING DAMPERS
.1
Install to ULC requirements.
.2
Locate in firewalls, ceilings, floors and partitions shown with fire ratings on Architectural
drawings and details.
.3
Seal around fire damper assembly.
1.9
FLASHING
.1
Provide flashings to suit installation.
.2
Follow detail drawings for vents and pipes penetrating roofs.
1.10
FRESH AIR AND EXHAUST LOUVRES
.1
Install flush and true with exterior wall surfaces.
.2
Thoroughly caulk entire perimeter of louvre with acceptable material.
.3
Where other Divisions specify louvres, this Contractor to make all required duct
connections.
.4
Caulk all joints at louvre connection and make duct connection watertight.
1.11
GAS VENTS AND STACKS
.1
Follow Manufacturer's recommendations for prefabricated components. Comply with
requirements of Authorities. Provide a minimum of three 6mm (¼") stainless steel guy
cables with turnbuckles on any vent (or stack) higher than 1500mm (5'-0") above roof.
1.12
GRILLES, REGISTERS AND DIFFUSERS
.1
Where visible retaining fasteners are needed, install oval head plated screws in
countersunk holes.
.2
Set squarely in place parallel to adjacent building lines.
.3
Ensure unit is compatible with ceiling or wall construction.
.4
Floor grilles to be set flush with floor coverings except carpet. Frame to lap over carpet.
.5
Ensure devices are set rigidly in place and properly secured.
.6
Make connections of rigid or flexible ductwork to diffusers, VAV terminals and air
distribution boots using a minimum of 3 self tapping screws and seal with glass fab tape
and high velocity duct sealer.
1.13
HIGH PRESSURE DUCTWORK
.1
Drawings indicate general layout of ductwork. Additional offsets or changes in direction
to be made at no extra cost to the University of Manitoba.
.2
On round and spiral ductwork, outside sleeve surface and duct to be brushed with sealing
compound before assembly. Place sheet metal screws on 200mm (8") centres, with
three screws, each side of joint. After assembly, brush both joint and screws with sealing
compound. Seal all duct seams, and joints between ducts, fillings, etc. with Duro-Dyne
S-2 duct sealer and Duro-Dyne FT-2 fiberglass duct tape. Prior to installation ductwork to
be clean, dry and free of grease. Apply duct sealer with a stiff brush or trowel. Wrap wet
seam or joint with duct tape and apply further coat of duct sealer. Duct sealer and glass
fiber to extend 25mm (1") on each side of joint or seam.
.3
90º elbows to be 5-piece mitred construction. 200mm (8") diam. 90 deg. elbows or less
can be solid 1-piece molded type. Use conical connections throughout installation.
.4
Install flat oval ducts as per Manufacturer’s published Bulletin F.O. #6. Brace with United
truss couplings or angle flanges on four-foot centres. Use companion angle flanges
when maximum width (major axis dimension) exceeds 650mm (26"). This bracing to limit
wall deflection from static pressure to maximum of 10mm (.41") at 1.2 kPa (5") static
pressure. Provide matched fittings. Install and seal as per requirements for round and
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Req #
Section 15800
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spiral ductwork.
1.14
MOTORIZED DAMPERS
.1
Install all automatic dampers free from distortion and binding of linkages.
.2
Thoroughly caulk around frames.
1.15
PLENUMS AND CASINGS
.1
Install hinged doors to swing outward on the suction side of the fan and inward where a
positive pressure may exist in the plenum.
.2
Provide gasketting around all doors and seal all seams and joints with high velocity duct
sealer.
.3
Construct coil mounting racks to ensure capability of future removal.
.4
Provide two coats of mastic compound on inner surface of drip trays.
.5
Seal all joints in filler pieces to prevent bypass and install filter banks for easy servicing.
.6
Provide independently gasketted removable panels for access to coils and/or plenum
exterior, provide split escutcheon plates with gasketting, securely screwed in place, at all
points where panels are penetrated by piping and conduit.
.7
Where fabricated panels are placed on masonry walls, provide 50mm (2") spacing to
prevent vibration transmissions.
1.16
SHEET METAL INSTALLATION
.1
During installation protect open ends of ducts to prevent debris and dirt from entering.
.2
Where ducts are shown along side of partitions, place tight to the surface.
.3
Kitchen Exhaust Ductwork:
.1
Do all work in accordance with NFPA 96.
.2
Use gasket material at flanged connections rated at 1100C minimum.
.3
Use 6mm (¼") bolts or studs at flanged connections and ensure a leaktight joint.
.4
Provide hangers and vertical supports 1200mm (48") on centre.
.5
Install horizontal sections level without dips or traps.
.6
Provide access openings on the side of the duct at each change in direction with
the lower edge of the opening not less than 40mm (1½") above the bottom of the
duct.
.7
Install all ductwork 450mm (18") clear of combustible construction and 150mm
(6") clear of non-combustible construction.
.8
Ensure fan outlets are ducted to terminate 1000mm (40") minimum above the
roofline and be 3m (10') minimum from adjacent buildings, property lines, air
intakes and adjoining grade levels.
1.17
TESTING OF HIGH PRESSURE DUCTWORK
.1
Outlets from test section to be sealed off.
.2
Apply required test pressure. Use special testing fan.
.3
Determine leakage with manometer and orifice plate in connection between fan and test
section.
.4
Test apparatus and method to be approved by Consultant.
.5
Test ductwork at 1.5 kPa (6") W.G. Leakage not to exceed 1% of average operating air
flow in section.
.6
Notify Consultant one week in advance of when such tests are to take place.
1.18
VAV TERMINALS
.1
Support independently of ductwork.
.2
Do not install inlet ductwork in lengths less than that required by the Manufacturer.
.3
Do not provide inlet ductwork less than 1500 mm (5 ft.) long.
1.19
VIBRATION AND OBJECTIONABLE NOISE
.1
Install ductwork free from pulsation, chatter, vibration or objectionable noises.
.2
Should any of these defects appear after the system is in operation, correct problems by
February 27, 2015
University of Manitoba
AIR DISTRIBUTION
Req #
Section 15800
Page 23
removing, replacing, or reinforcing the work as directed by the Consultant.
END OF SECTION 15800
February 27, 2015