July 22, 1994

Contract \# TW0592

**SPECIAL SPECIFICATION**

**SECTION 15870**

**[POWER VENTILATORS]{.underline}**

[Page]{.underline}

**[PART 1 - GENERAL]{.underline}**

1.01 Description.. 2

1.02Related Work.. 2

1.03Quality Assurance.. 3

1.04References.. 3

1.05Submittals.. 3

1.06 Delivery, Storage, and Handling.. 4

1.07Sequencing.. 4

1.08Extra Material.. 4

**[PART 2 - PRODUCTS]{.underline}**

2.01Acceptable Manufacturers. 5

2.02 Fans. 5

2.03 Centrifugal Roof Exhauster.. 6

2.04 Axial Roof Ventilators. 7

2.05 Ceiling-Mounted Ventilators.. 8

2.06 Motors.. 8

**[PART 3 - EXECUTION]{.underline}**

3.01 Inspection.. 12

3.02 Installation/Application/Erection.. 12

3.03 Field Quality Control\... 13

3.04 Adjusting and Cleaning\... 13

3.05 Commissioning\.... 13

3.06 Demonstration\.... 13

**SPECIAL SPECIFICATION**

**SECTION 15870**

**[POWER VENTILATORS]{.underline}**

**[PART 1 - GENERAL]{.underline}**

**1.01 [DESCRIPTION]{.underline}**

> A. This Section and the work indicated on the Drawings compose the
> work for providing the power ventilators.
>
> B. This Section includes the following types of power ventilators:
>
> 1\. Roof-mounted supply fans.
>
> 2\. Roof-mounted exhausters.
>
> 3\. Ceiling-mounted ventilators.

**1.02 [RELATED WORK]{.underline}**

> A. Section 01300
>
> B. Section 15010
>
> C. Section 15200
>
> D. Section 15901
>
> E. Section 15995
>
> F. Division 7 Section \"Roof Specialties and Accessories\" for roof
> curbs and equipment supports.
>
> G. Division 16 Section \"Circuit and Motor Disconnects\" for
> disconnect switches.
>
> H. Division 16 Section \"Motor Controllers\" for motor starters.
>
> I. Division 16 Section \"Motor Control Centers\" for starters and
> fusible switches.

**1.03 [QUALITY ASSURANCE]{.underline}**

> A. Design, manufacture, and test fans in accordance with
> Underwriter\'s Laboratories (UL) 705 \"Power Ventilators.\"
>
> B. Use UL listed and labeled fans and components.
>
> C. Use motors and electrical accessories that comply with National
> Electrical Manufacturers Association (NEMA) standards.
>
> D. Provide components and installation according to National Fire
> Protection Association (NFPA) 70 \"National Electrical Code.\"

**1.04 [REFERENCES]{.underline}**

> A. Anti-Friction Bearing Manufacturers Association (AFBMA) Standard 9
> for ball bearings
>
> B. AFBMA Standard 11 for roller bearings
>
> C. Air Movement Contractors Association (AMCA) Standard 210/American
> Society of Heating, Refrigerating, and Air-Conditioning Engineers
> (ASHRAE) Standard 51, Laboratory Methods of Testing Fans for Rating
>
> D. AMCA Standard 300, Test Code for Sound Rating
>
> E. AMCA Standard 301, Method for Calculating Fan Sound Ratings From
> Laboratory Test Data
>
> F. CFR Volume 29, Part 1910.7
>
> G. Institute of Electrical and Electronic Engineers (IEEE) Standard
> 112, Test Method B
>
> H. NEMA 1
>
> I. NEMA Standard MG 1
>
> J. NFPA 70, National Electrical Code
>
> K. UL 705, Power Ventilators

**1.05 [SUBMITTALS]{.underline}**

> A. Make submittals according to this Section, Section 15010, and
> Section 01300.
>
> B. Submit product data for selected models, including specialties,
> accessories, and the following:
>
> 1\. Certified fan performance curves with system operating conditions
> indicated. Performance curves are to be corrected to 5,200 ft.
> altitude.
>
> 2\. Certified fan sound power ratings.
>
> 3\. Motor ratings and electrical characteristics plus motor and fan
> accessories.
>
> 4\. Materials gages and finishes.
>
> 5\. Dampers, including housings, linkages, and operators.
>
> C. Submit shop drawings from manufacturer detailing equipment
> assemblies and indicating dimensions, weights, required clearances,
> components, and location and size of field connections.
>
> D. Submit wiring diagrams that detail power, signal, and control
> wiring. Differentiate between manufacturer-installed wiring and field-
> installed wiring.
>
> E. Submit maintenance data in operating and maintenance manual as
> specified in Section 01300.

**1.06 [DELIVERY, STORAGE, AND HANDLING]{.underline}**

> A. See Section 15010.

**1.07 [SEQUENCING]{.underline}**

> A. Coordinate the installation of roof curbs, equipment supports, and
> roof penetrations specified in Division 7.
>
> B. Coordinate the size and location of structural steel support
> members.

**1.08 [EXTRA MATERIAL]{.underline}**

> A. Furnish one additional complete set of belts for each belt-driven
> fan.

**[PART 2 - PRODUCTS]{.underline}**

**2.01 [ACCEPTABLE MANUFACTURERS]{.underline}**

> A. Provide roof-mounted exhauster by one of the following:
>
> 1\. Cook (Loren) Co.
>
> 2\. Greenheck Fan Corp.
>
> 3\. ILG Industries, Inc.
>
> B. Provide roof-mounted supply fans by one of the following:
>
> 1\. Cook (Loren) Co.
>
> 2\. Greenheck Fan Corp.
>
> 3\. ILG Industries, Inc.
>
> C. Provide ceiling-mounted ventilators by one of the following:
>
> 1\. Cook (Loren) Co.
>
> 2\. Greenheck Fan Corp.
>
> 3\. ILG Industries, Inc.

**2.02 [FANS]{.underline}**

> A. Provide fans that are factory fabricated and assembled, factory
> tested, and factory finished with indicated capacities and
> characteristics.
>
> B. Fans and Shafts: Statically and dynamically balanced and designed
> for continuous operation at the maximum rated fan speed and motor
> horsepower.
>
> 1\. Fan Shaft: Turned, ground, and polished steel designed to operate
> at no more than 70 percent of the first critical speed at the top of
> the speed range of the fan\'s class.
>
> C. Belt Drives: Factory mounted, with final alignment and belt
> adjustment made after installation.
>
> 1\. Service Factor: 1.4.
>
> D. Belts: Oil-resistant, nonsparking, and nonstatic.
>
> E. Motors and Fan Wheel Pulleys: Adjustable pitch for use with motors
> through 15 horsepower (hp); fixed pitch for use with motors larger
> than 15 hp. Select pulley so that pitch adjustment is at the middle of
> the adjustment range at fan design conditions.
>
> 1\. Belt Guards: Provide steel belt guards for motors mounted on the
> outside of the fan cabinet.
>
> F. Shaft Bearings: Provide type indicated, having a median life
> \"Rating Life\" (AFBMA (L(50)) of 200,000, calculated in accordance
> with AFBMA Standard 9 for ball bearings and AFBMA Standard 11 for
> roller bearings.
>
> G. Factory Finish: The following finishes are required:
>
> 1\. Sheet Metal Parts: Prime coating prior to final assembly.
>
> 2\. Exterior Surfaces: Baked-enamel finish coat after assembly.
>
> H. The following factory tests are required:
>
> 1\. Sound Power Level Ratings: Comply with AMCA Standard 301 \"Method
> for Calculating Fan Sound Ratings From Laboratory Test Data.\" Test
> fans in accordance with AMCA Standard 300 \"Test Code for Sound
> Rating.\" Fans shall be licensed to bear the AMCA Certified Sound
> Ratings Seal.
>
> 2\. Fan Performance Ratings: Establish flow rate, pressure, power, air
> density, speed of rotation, and efficiency by factory tests and
> ratings in accordance with AMCA Standard 210/ASHRAE Standard 51 -
> Laboratory Methods of Testing Fans for Rating.

**2.03 [CENTRIFUGAL ROOF EXHAUSTER]{.underline}**

> A. General Description: Belt-driven or direct-drive as indicated,
> centrifugal consisting of housing, wheel, fan shaft, bearings, motor,
> drive assembly, curb base, and accessories.
>
> B. Housing: Heavy-gage, removable, spun-aluminum, dome top and outlet
> baffle; square, one-piece, hinged aluminum base with venturi inlet
> cone.
>
> C. Fan Wheel: Aluminum hub and wheel with backward-inclined blades.
>
> D. Belt-Driven Drive Assembly: Resiliently mounted to the housing,
> with the following features:
>
> 1\. Pulleys: Cast-iron, adjustable-pitch.
>
> 2\. Shaft Bearings: Permanently lubricated, permanently sealed,
> self-aligning ball bearings.
>
> 3\. Fan Shaft: Turned, ground, and polished steel drive shaft keyed to
> wheel hub.
>
> 4\. Fan and motor isolated from exhaust air stream.
>
> E. Accessories: The following items are required as indicated:
>
> 1\. Bird Screens: Removable 1/2-inch (in.) mesh, 16-gage, aluminum or
> brass wire.
>
> 2\. Dampers: Counterbalanced, parallel-blade, backdraft dampers
> mounted in curb base, factory set to close when fan stops.
>
> 3\. Roof Curbs: Prefabricated, heavy-gage, galvanized steel; mitered
> and welded corners; 2-in.-thick, rigid, fiberglass insulation adhered
> to inside walls; built-in cant and mounting flange for sloped roof
> decks; and 2-in. wood nailer. Size as required to suit roof opening
> and fan base. Provide for required slope of the roof.
>
> a\. Overall Height: 12 in..

**2.04 [AXIAL ROOF VENTILATORS]{.underline}**

> A. General Description: Belt-driven or direct-drive as indicated,
> axial fans consisting of housing, wheel, fan shaft, bearings, motor,
> drive assembly, curb base, and accessories.
>
> B. Housing: Heavy-gage, removable, spun-aluminum, dome top and outlet
> baffle; and square, one-piece, hinged, aluminum base.
>
> C. Fan Wheel: Aluminum hub and blades.
>
> D. Belt-Driven Drive Assembly: Resiliently mounted to the housing,
> with the following features:
>
> 1\. Pulleys: Cast-iron, adjustable-pitch.
>
> 2\. Shaft Bearings: Permanently lubricated, permanently sealed,
> self-aligning ball bearings.
>
> 3\. Fan Shaft: Turned, ground, and polished steel drive shaft keyed to
> wheel hub.
>
> E. Filters: Filters are permanent, washable, 2-in. aluminum
> mesh-mounted in aluminum filter channel.
>
> F. Accessories: The following items are required as indicated:
>
> 1\. Bird Screens: Removable, 1/2-in. mesh, 16-gage aluminum or brass
> wire.
>
> 2\. Dampers: Counter-balanced, parallel-blade, backdraft dampers
> mounted in curb base; factory set to close when fan stops.
>
> 3\. Roof Curbs: Prefabricated, heavy-gage, galvanized steel; mitered
> and welded corners; 2-in.-thick, rigid fiberglass insulation adhered
> to inside walls; built-in cant and mounting flange for sloped roof
> deck; and 2-in. wood nailer. Size as required to suit roof opening and
> fan base. Provide for required slope of the roof.
>
> a\. Overall Height: 12 in..

**2.05 [CEILING-MOUNTED VENTILATORS]{.underline}**

> A. General Description: Centrifugal fan designed for installation in
> ceiling or concealed inline applications.
>
> B. Housing: Galvanized steel lined with acoustical insulation.
>
> C. Fan Wheel: Centrifugal wheels directly mounted on motor shaft Fan
> shrouds, motor, and fan wheel shall be removable for service.
>
> D. Grille: Aluminum with white baked enamel finish, louvered grille
> with flange on intake and thumbscrew attachment to fan housing.
>
> E. Electrical Requirements: Junction box for electrical connection on
> housing and receptacle for motor plug-in.
>
> F. Accessories: Manufacturer\'s standard, wall cap, and transition
> fittings as indicated.

**2.06 [MOTORS]{.underline}**

> A. General
>
> 1\. Apply requirements below to motors covered by this Section except
> as otherwise indicated.
>
> 2\. Motors 1 horsepower (hp) and Larger: Polyphase.
>
> 3\. Motors Smaller Than 1 hp: Single-phase.
>
> 4\. Frequency Rating: 60 Hz.
>
> 5\. Voltage Rating: Determined by voltage of circuit to which motor is
> connected for the following motor voltage ratings (utilization
> voltages):
>
> a\. Motors smaller than 1 hp: 120 V circuit, 115 V - motor rating.
>
> b\. Motors 1 hp and larger: 480 V circuit, 460 V - motor rating.
>
> 6\. Service factors indicated for motors are minimum values and apply
> at frequency and utilization voltage at which motor is connected.
> Provide motors which will not operate in service factor range when
> supply voltage is within 10 percent of motor voltage rating.
>
> 7\. Provide permanent-split capacitor classification motors for
> shaft-mounted fans and capacitor start classification for belted fans.
>
> 8\. Capacity: Minimum size as indicated. If not indicated, sufficient
> to start and operate connected loads at designated speeds in indicated
> environment, and with indicated operating sequence, without exceeding
> nameplate ratings. Provide motors rated for continuous duty at 100
> percent of rated capacity.
>
> 9\. Temperature Rise: 50 degree (deg) Celsius (C) maximum temperature
> rise at 40 deg C ambient for continuous duty at full load (Class A
> Insulation).
>
> 10\. Motor Speed: Single, multiple, or variable as indicated.
>
> 11\. Motor Construction: NEMA Standard MG 1.
>
> a\. Bases: Adjustable.
>
> b\. Bearings: The following features are required:
>
> 1\) Ball or roller bearings with inner and outer shaft seals.
>
> 2\) Grease lubricated.
>
> 3\) Designed to resist thrust loading where belt drives or other
> drives produce lateral or axial thrust in motor.
>
> c\. Enclosure Type: The following features are required:
>
> 1\) Open drip-proof motors where satisfactorily housed or remotely
> located during operation.
>
> 2\) Guarded drip-proof motors where exposed to contact by employees or
> building occupants.
>
> d\. Noise rating: Quiet.
>
> e\. Nameplate: Indicate the full identification of manufacturer,
> ratings, characteristics, construction, and special features.
>
> 12\. Starters, Electrical Devices, and Wiring: Electrical devices and
> connections are specified in Division 16.
>
> B. Polyphase Motors
>
> 1\. Squirrel-cage, induction-type, general-purpose conforming to the
> following requirements except as otherwise indicated.
>
> 2\. NEMA Design Letter Designation: \"B,\" unless specifically
> designated \"C\" for high starting torque.
>
> 3\. Service Factor: 1.15.
>
> 4\. Energy Efficient Motors: Nominal efficiency equal to or greater
> than that stated in NEMA MG 1, table 12-6C for that type and rating of
> motor.
>
> 5\. Variable Speed Motors for Use With Solid-State Drives: Energy
> efficient, squirrel-cage induction, design B units with ratings,
> characteristics, and features coordinated with and approved by drive
> manufacturer.
>
> 6\. Internal Thermal Overload Protection For Motors: For motors so
> indicated, protection automatically opens control circuit arranged for
> external connection. Protection operates when winding temperature
> exceeds safe value calibrated to the temperature rating of the motor
> insulation.
>
> 7\. Bearings: Double-shielded, pre-lubricated ball bearings suitable
> for radial and thrust loading of the application, unless noted
> otherwise.
>
> C. Single-Phase Motors
>
> 1\. Conform to the following requirements except as otherwise
> indicated.
>
> 2\. Energy Efficient Motors: One of the following types as selected to
> suit the starting torque and other requirements of the specific motor
> application.
>
> a\. Permanent Split Capacitor.
>
> b\. Split-Phase Start, Capacitor-Run.
>
> c\. Capacitor-Start, Capacitor-Run.
>
> 3\. Service Factor: 1.35.
>
> 4\. Shaded-Pole Motors: Use only for motors smaller than 1/20 hp.
>
> 5\. Internal Thermal Overload Protection for Motors: For motors so
> indicated, protection automatically opens the power supply circuit to
> the motor, or a control circuit arranged for external connection.
> Protection operates when winding temperature exceeds a safe value
> calibrated to the temperature rating of the motor insulation. Provide
> device that automatically resets when motor temperature returns to
> normal range except as otherwise indicated.
>
> 6\. Bearings, belt connected motors and other motors with high radial
> forces on motor shaft shall be ball bearing type. Sealed,
> pre-lubricated sleeve bearings may be used for other single phase
> motors.

**[PART 3 - EXECUTION]{.underline}**

**3.01 [INSPECTION]{.underline}**

> A. Inspect areas and conditions, with Installer present, for
> compliance with requirements for installation tolerances, roof curbs,
> equipment supports, and other conditions affecting performance of
> fans.
>
> B. Do not proceed until unsatisfactory conditions have been corrected.

**3.02 [INSTALLATION/APPLICATION/ERECTION]{.underline}**

> A. General
>
> 1\. Install fans level and plumb, in accordance with manufacturer\'s
> written instructions. Support units as described below, using the
> vibration control devices indicated.
>
> a\. Secure roof-mounted fans to roof curbs with cadmium-plated
> hardware.
>
> 1\) Installation of roof curbs is specified in Division 7.
>
> b\. Suspended Units: Suspend units from structural steel support frame
> using threaded steel rods and vibration isolation springs.
>
> 2\. Arrange installation of units to provide access space around air-
> handling units for service and maintenance.
>
> B. Connections
>
> 1\. Duct installations and connections are specified in other Division
> 15 sections. Make final duct connections with flexible connections.
>
> 2\. The following requirements apply:
>
> a\. Electrical power wiring is specified in Division 16.
>
> b\. Temperature control wiring and interlock wiring are specified in
> Section 13943.
>
> c\. Grounding: Connect unit components to ground in accordance with
> the National Electrical Code.

**3.03 [FIELD QUALITY CONTROL]{.underline}**

> A. Arrange and pay for a factory- authorized service representative to
> perform the following:
>
> 1\. Inspect the field assembly of components and installation of fans
> including ductwork and electrical connections.
>
> 2\. Prepare a written report on findings and recommended corrective
> actions.

**3.04 [ADJUSTING AND CLEANING]{.underline}**

> A. Adjust damper linkages for proper damper operation.
>
> B. Clean unit cabinet interiors to remove foreign material and
> construction dirt and dust. Vacuum clean fan wheel and cabinet.

**3.05 [COMMISSIONING]{.underline}**

> A. Provide labor, material, equipment, etc., required to facilitate
> the commissioning process. Perform tests and verification procedures
> required by the commissioning process when requested by the
> Commissioning Authority and directed by the General Contractor. See
> Section 15995.

**3.06 [DEMONSTRATION]{.underline}**

> A. Provide for a factory-authorized service representative to start-up
> equipment, to demonstrate, and to train personnel.
>
> B. See Section 15995.
>
> END OF SECTION