1.03 Quality Assurance

MPS Master

SECTION 23 34 00

HVAC FANS

PART 1 - GENERAL

1.01 SUMMARY

A.Section Includes: Include labor, materials, equipment, and accessories to furnish and install fans with related connections shown on Drawings.

1.02 SUBMITTALS

A.Shop Drawings: Submit a portfolio showing supply, return, and exhaust fan units to be used, indicating service to be performed for approval by Architect/Engineer.

1.03 QUALITY ASSURANCE

A.Regulatory Requirements:

1.StateBuilding Code

2.Local Codes and Ordinances

3.Local Authority having jurisdiction

PART 2 - PRODUCTS

2.01 MANUFACTURERS

A.Acceptable Manufacturers for Spun Aluminum Power Roof Exhaust Fans - Direct Drive: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Cook

2.Greenheck

B.Acceptable Manufacturers for Spun Aluminum Power Roof Exhaust Fans - Belt Drive: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Cook

2.Greenheck

C.Acceptable Manufacturers for Up-Blast Centrifugal Roof Exhausters: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Greenheck

2.Cook

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MPS Master

SECTION 23 34 00

D.Acceptable Manufacturers for Belt Driven Kitchen Hood Exhaust Fan: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Greenheck

2.Cook

E.Acceptable Manufacturers for Belt Driven Centrifugal Inline Fans: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Cook

2.Greenheck

F.Acceptable Manufacturers for Airfoil Axial Fans: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Trane

2.Twin City/Aerovent

3.Barry Blower

G.Acceptable Manufacturers for Small Cabinet Fan: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Penn Ventilator Company - Zepher Model

2.Cook

3.Greenheck

4.Broan

5.Twin City/Aerovent

H.Acceptable Manufacturers for Utility Sets: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Greenheck

2.Trane

3.Twin City/Aerovent

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HVAC Fans

MPS Master

SECTION 23 34 00

I.Acceptable Manufacturers for Belt Driven Kitchen Hood Exhaust Fan (Utility Set): Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Penn

2.Greenheck

3.Cook

4.Twin City/Aerovent

J.Acceptable Manufacturers for Centrifugal Fans: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Trane

2.Barry

3.Champion

4.Twin City/Aerovent

K.Acceptable Manufacturers for Propeller Fans Belt Drive: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Greenheck

2.Cook

3.Twin City/Aerovent

L.Acceptable Manufacturers for Mixed Flow Fans: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Trane

2.Chicago Blower

3.Twin City/Aerovent

4.Cook

5.Greenheck

M.Acceptable Manufacturers for Low Silhouette Propeller Power Relief Fans Belt Drive: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

1.Greenheck

2.Cook

3.TwinCity Fan

2.02 SPUN ALUMINUM POWER ROOF EXHAUST DIRECT DRIVE

A.General Requirements: Direct drive power roof exhausters shall be UL listed fans and shall be statically and dynamically balanced in factory prior to shipping.

B.Housing: Fan housing shall be of heavy gauge spun aluminum construction with galvanized steel support members. Unit shall be weatherproof and shall incorporate an integral weather shield. Bird screen shall be factory applied over fan discharge openings.

1.Provide a factory applied bird screen, with 85percent free area, over fan discharge openings.

2.Provide a backdraft damper in fan base.

3.Fans shall have an integral factory formed base and 1piece spinnings without welding. Housings shall be provided with wiring channel and shall be of the direct discharge design.

C.Wheel: Fan wheel shall be of backwardly inclined, nonoverload design with ball bearings supported by framework on rubber vibration isolators. Key statically and dynamically balanced wheel to drive shaft.

D.Motor: Direct drive units shall have extended drive shaft through the fan wheel. Mount motor on vibration isolated framework above fan wheel in fan housing for air cooling.

1.Motors shall be ECM and have integral automatic thermal overload protection and integral speed controller.

E.Electrical: Motors for direct drive units shall be single phase, 120 volt, 60 Hertz, A.C. Furnish unit with a disconnect switch inside the fan housing and factory wired from disconnect switch to motor. Motor shall be supplied with a factory installed speed controller for each unit.

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HVAC Fans

MPS Master

SECTION 23 34 00

F.Roof Curb: Curb shall be fabricated of 18 gauge galvanized steel with liquid tight, continuously welded corner seams, prime coat, 11/2inch wood nailer and 11/2inch, 3pounddensity rigid fiberglass insulation. Curb shall be straight cantless type with full metal liner. All curbs to havea 18” curb extensionwith factory access door, gravity backdraft damper.

2.03 SPUN ALUMINUM POWER ROOF EXHAUST FANS DIRECT DRIVE ONLY

A.General Requirements: Belt driven power roof exhausters shall be Underwriters' Laboratories listed fans, shall be rated based on tests made in accordance with AMCA Standard 210, and shall meet the requirements of certified AMCA ratings. Units shall be statically and dynamically balanced in factory prior to shipping.

1.Provide a factory applied bird screen, with 85percent free area, over fan discharge openings.

2.Provide a backdraft damper in fan base.

3.Fans shall integral factory formed base and 1piece spinnings without welding. Housings shall be provided with wiring channel and shall be of the direct discharge design.

C.Wheel: Fan wheel shall be of the backwardly inclined, nonoverload design, manufactured of sparkproof aluminum. Key wheel to anticorrosion steel shaft supported by (2)prelubricated bearings attached to vibration isolated heavy steel framing, fan wheel, and motor support

D.Direct DriveMotor: ECM type having permanently lubricated ball bearings. Mount motor below drive.

1.Motor shall have integral automatic reset thermal overload protection.

2.On fans that have a variable frequency drive, provide factory mounted motor-shaft ground system and the motor shall be inverter duty type motor.

E.Electrical: See Section 2305 13, Electrical Motor Schedule or the Equipment Schedule for voltage and rpm requirements. See Section 2305 13 for motor minimum efficiency. Furnish unit with a disconnect switch inside fan housing, factory wired from disconnect switch to motor.

2.04 UPBLAST CENTRIFUGAL ROOF EXHAUSTERS

A.General Requirements: Belt driven upblast roof exhausters shall be Underwriters' Laboratories listed fans, shall be rated based on tests made in accordance with AMCA Standard 210, and shall meet the requirements of certified AMCA ratings. Units shall be statically and dynamically balanced in factory prior to shipping.

B.Housing: Fan housing shall be of galvanized steel or aluminum, low contour style construction; shall be completely weatherproofed; and shall be securely fastened to roof curb. Fan supporting framework shall be constructed of acrylized steel members. Bird screen shall be factory applied over fan discharge openings.

1.Finish: Furnish units with a factory applied coat of RustOleum, or Owner approved equal, paint applied on either zinc chromate primed galvanized steel or acid etched aluminum.

2.Fans shall be weatherproof and include adequate drainage at bottom.

3.Provide a backdraft damper in fan base.

C.Wheel: Fan wheel shall have backwardly inclined, nonoverloading aluminum wheels with integral cooling fans. Fan wheel shall be spark resistant and nonoverloading.

1.Drive shaft shall be ground and polished steel and shall have a rust protective treatment.

a.Keyed, adjustable, pulleys shall be fixed with set screws.

D.Motors: Unit shall be furnished with a ULapproved open drip proof motor of an energy efficient design. Motors shall be located out of the airstream. Motor shall have integral automatic reset thermal overload protection.

1.Refer to Section 230513, Common Motor Requirements for HVAC Equipment, or the Equipment Schedule for voltage and rpm requirements. Refer to Section 230513 for motor minimum efficiency.

2.Motor and drive assembly shall be cleaned with clean outside air.

3.Fan shall be furnished with a factory installed, weather tight, disconnect switch connected to motor with high temperature wire in flexible metal conduit.

E.Roof Curb: Curb shall be fabricated of 18 gauge galvanized steel with liquid tight, continuously welded corner seams, prime coat, 11/2inch wood nailer and 11/2inch, 3pounddensity rigid fiberglass insulation. Curb shall be straight cantless type with full metal liner. All curbs to havea 18” curb extensionwith factory access door, gravity backdraft damper.

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MPS Master

SECTION 23 34 00

2.05 BELT DRIVEN CENTRIFUGAL INLINE FANS

A.General: Belt driven axial flow fans shall be as detailed on Drawings and specified. Capacity ratings shall be based upon tests performed in strict accordance with AMCA Standard 210 Test Code for air moving devices. Each fan shall carry near the manufacturer's nameplate the seal authorized by AMCA indicating that capacity ratings are certified. Fans not bearing this seal shall not be acceptable.

B.Tubular Housing: Each end of housing shall have connecting flanges for attachment of flexible connection and ductwork. Round fan casing shall be of 14gauge aluminum with deep spun inlet venturi and discharge straightening vanes. Provide inlet or outlet screen when no ductwork connection is made to the fan.

1.Angle supports shall be fastened to the sides of the unit for horizontal suspension with rod hangers and isolators.

2.Contractor shall externally insulate housing to absorb sound and control condensation.

C.Wheel: True airfoil design with backward inclined, nonoverloading blades of aluminum or tubular, welded steel, statically and dynamically balanced.

D.Motor and Drive: Motor shall be mounted on the exterior of unit housing with the shaft bearings encased within the fan tube. Motor shall have integral automatic reset thermal overload protection. Unit shall be provided with a fixed drive pulley for specified duty.

1.Contractor shall provide one additional drive pulley and installation labor. Performance rating shall be selected and second pulley shall be installed following system installation, running check and balance. Contractor shall retain drive pulley not used. Units shall be as specified.

a.Unit shall be provided with an OSHA approve belt guard.

2.On fans that have a variable frequency drive, provide factory mounted motor-shaft ground system and the motor shall be inverter duty type motor.

E.Electrical: Refer to Section 230513, Common Motor Requirements for HVAC Equipment, or the Equipment Schedule for voltage and rpm requirements. See Section 230513 for motor minimum efficiency.

1.Unit shall be furnished with a disconnect switch installed on top of the fan housing, factory wired from the disconnect switch to the motor.

2.06 AIRFOIL AXIAL FANS

A.General Requirements: Fans shall be UL listed fans, shall be rated based on tests made in accordance with AMCA Standards 210 and 300, shall meet the requirements of certified AMCA ratings and shall bear the AMCA Certified Rating Seal.

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HVAC Fans

MPS Master

SECTION 23 34 00

1.Fans shall be dynamically balanced to eliminate vibration and noise transmission to occupied areas. Variable air volume fans shall be balanced at (10) different fans speeds over the specified operating range.

B.Fan Wheel: Fan wheel shall be an aluminum single piece precision casting with (8) radially projected blades with air-foil cross section. Wheel shall be dynamically balanced and keyed to fan shaft.

C.Fan Housing: Housings shall be made of 14gauge steel hydraulically expanded to form integral inlet bell and diffusers sections. Hydraulically expanded stiffing ring welded in area of wheel raceway. On VAV variable speed fan units, fan inlet supports shall be structurally reinforced to handle extra stresses of variable speed fan modulation. Provide inlet or outlet screen when no ductwork connection is made to the fan.

1.Fan shall have tapered inlet and outlet shells over fan hub assembly. Shells shall uniformly accelerate air through blade area. End bell covers drive assembly and shall thereby reduce flow turbulence. Blade to shell clearance shall be in the range of 30mils.

2.Fan parts shall be painted with enamel primer prior to final assembly. Finish coat shall be executive beige enamel applied to the exterior surfaces after assembly.

D.Motors and Drives: Refer to Section 230513, Common Motor Requirements for HVAC Equipment, or the Equipment Schedule for voltage and rpm requirements. Refer to Section 230513 for motor minimum efficiency. Furnish unit with a disconnect switch inside fan housing, factory wired from disconnect switch to motor.

1.Bearings: Precision, flange mounted, selfaligning bearing shall be at the inlet and discharge. Bearings shall be grease lubricated and selected for a minimum average life (AFBMA L10) in excess of 200,000 hours at maximum cataloged operating conditions. Bearing greaselines shall be extended out through the fan shell and acoustical enclosure.

2.Shaft: Shaft shall be solid ANSI C1040 hotrolled steel turned and polished. Close tolerances shall be maintained where shaft makes contact with bearings.

3.Factory Drives and Post-TABB Drives: A factory Vbelt drive shall be fixed pitch rated at 1.5 times the motor nameplate. Drives 20horsepower and larger, or any drives on units equipped with VFDs, shall be fixed pitch. V-Belt Drive: Cast iron or steel shall be computer selected for low noise, low maintenance operation. Center distance and arc of contact shall be maintained within prefixed limits. Constant speed fans shall use variable or constant pitch drives; variable speed modulated fans shall use fixed drives only. Drive selection shall be sized after preliminary TAB work has established unit preliminary cfm. No additional cost shall be incurred by Owner

4.Lubrication: Lubrications fittings shall be extended to outside of acoustical enclosure for ease of servicing.

5.On fans that have a variable frequency drive, provide factory mounted motor-shaft ground system and the motor shall be inverter duty type motor.

E.Sound Attenuators:

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HVAC Fans

MPS Master

SECTION 23 34 00

1.When indicated in the schedule, the manufacturer shall provide a sound attenuator per the requirements of Section 233300.

2.If manufacturer cannot obtain outlet sound power levels indicated, they shall provide sound attenuators. Supplier to include any additional cost if motor horsepower increases and the cost related to installing the additional sound attenuators.

2.07 KITCHEN HOOD EXHAUST FANS

A.Ratings:

1.Kitchen hood exhaust power roof ventilators shall be safety tested and listed by UL to operate continuously at 300degreesF for the removal of smoke and grease laden vapors.

2.Kitchen exhaust power roof ventilator ratings shall be based upon tests performed in strict accordance with AMCA Standard 210 Test Code for air moving devices and shall carry the AMCA seal.

B.Housing: Heavy gauge steel, allwelded construction, rigidly supported with structural bracing. Removable rotor assembly shall allow access to wheel and ductwork for periodic cleaning. Removable weather cover shall provide access to fan motor and belt. A vertical discharge shall extend from the unit housing and shall discharge exhaust air high above the roof.

1.Unit housing shall receive (2)coats of ULapproved epoxy primer with polyurethane enamel finish.

2.Galvanized steel vertical discharge hood and motor/drive cover shall be primed and shall receive (2) coats of rust resistant paint.

3.Motor/damper access panel shall be watertight.

C.Fan Wheel: Fan shall utilize a backward inclined, non-overloading centrifugal wheel. The precision formed wheel blades shall be welded to spun shrouds then statically and dynamically balanced prior to assembly.

1.Unit shall be equipped with a spun inlet cone with close running clearance between cone and wheel to provide maximum efficiency.

D.Bearings: Fan shall be equipped with cast iron flange mounted, selfaligning ball bearings. Bearings shall be equipped with fittings for easy relubrication.

E.Fan Shaft: Fan shaft shall be precision ground for a precise fit.

F.Motors: Unit shall be furnished with a ULapproved open drip proof motor of an energy efficient design. Motor shall have integral automatic reset thermal overload protection.

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HVAC Fans

MPS Master

SECTION 23 34 00

1.Refer to Section 230513, Common Motor Requirements for HVAC Equipment, or the Equipment Schedule for voltage and rpm requirements. Refer to Section 230513 for motor minimum efficiency. Motor and drive chamber shall be furnished with a heat shield to protect against heat transmitted and radiated from below.

2.Hinged motor assembly shall permit the motor to be mounted in any of (3) positions. Motor mounting plate shall be located with (2) hinged bolts to provide easy belt alignment and tension.

3.Unit shall be provided with a factory installed and wired disconnect switch.

4.On fans that have a variable frequency drive, provided factory mounted motor-shaft ground system and the motor shall be inverter duty type motor.

G.Drives: Unit shall be furnished with adjustable pitch drives to provide speed adjustment to meet each application. Drive shall be selected to have a 1.5 service factor.