**November 21, 1997**

**Contract \# TW-0928**

**SPECIAL SPECIFICATION**

**SECTION 15875-S**

**[DUST COLLECTOR]{.underline}**

[Page]{.underline}

[PART 1 - GENERAL]{.underline}

1.01 Description 2

1.02 Related Work.. 2

1.03 Quality Assurance.. 2

1.04 References.. 3

1.05 Submittals.. 3

1.06 Delivery, Storage, and Handling.. 4

1.07 Sequencing.. 4

1.08 Extra Material.. 4

[PART 2 - PRODUCTS]{.underline}

2.01 Acceptable Manufacturers. 5

2.02 Fans 5

2.03 Dust Collectors.. 7

2.04 Motors 10

[PART 3 - EXECUTION]{.underline}

3.01 Inspection 13

3.02 Installation/Application/Erection 13

3.03 Field Quality Control\... 14

3.04 Adjusting and Cleaning 14

3.05 Commissioning\.... 14

3.06 Demonstration 14

**SPECIAL SPECIFICATION**

**SECTION 15875-S**

**[DUST COLLECTOR]{.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 dust collectors.
>
> B. This Section includes the following types of dust collectors:
>
> 1\. Staff Shop - General dust collector with filter tubes.
>
> 2\. Plasma Booth - High efficiency, aspirated, cartridge type with oil
> mist collector.

1.02 [RELATED WORK]{.underline}

> A. Section 01300-S
>
> B. Section 15010-S
>
> C. Section 15200-S
>
> D. Section 15901-S
>
> E . Division 16 Section \"Circuit and Motor Disconnects\" for
> disconnect switches.
>
> F. Division 16 Section \"Motor Controllers\" for motor starters.
>
> G. 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.
>
> 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

1.05 [SUBMITTALS]{.underline}

> A. Make submittals according to this Section, Section 15010-S, and
> Section 01300-S.
>
> 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 5,500 ft.
> altitude.
>
> 2\. Motor ratings and electrical characteristics plus motor and fan
> accessories.
>
> 3\. Materials gages and finishes.
>
> 4\. Dampers, including housings, linkages, and operators.
>
> C. Submit wiring diagrams that detail power, signal, and control
> wiring. Differentiate between manufacturer-installed wiring and field-
> installed wiring.
>
> D. Submit maintenance data in operating and maintenance manual as
> specified in Section 01300-S.

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

> A. See Section 15010-S.

1.07 [SEQUENCING]{.underline}

> A. Coordinate the installation of equipment anchors with the
> installation of the concrete pad.
>
> B. Coordinate the size and location of the concrete pad with the
> shape, anchoring and final position of the dust collectors.
>
> C. Coordinate and make final connection of all utility services
> including fire sprinkler piping.

1.08 [EXTRA MATERIAL]{.underline}

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

B. Furnish one additional set of disposable filters for oil mist
collector.

[PART 2 - PRODUCTS]{.underline}

2.01 [ACCEPTABLE MANUFACTURERS]{.underline}

> A. Provide dust collector with exhaust fans by one of the following:
>
> 1\. Aget Manufacturing Co. (Basis of design for Staff Shop Dust
> Collector)
>
> 2\. Farr Company. (Basis of design for Plasma Booth Dust Collector)
>
> 3\. MAC Equipment.

B. [Substitutions]{.underline}: only under provisions of Section 1600-S.

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. Color
> is to be SDR approved.
>
> 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.

I. Requirements for Plazma Spray Booth Dust Collector (DC-1) Exhaust
Fan: The basis of design is Attachment 1.

> 1\. 8000 cfm @ 6.1" W.G. ESP @ standard conditions. The fan external
> static pressure (ESP) drop includes losses up to the dust collector
> inlet, losses from the dust collector outlet to the far inlet, and
> losses from the fan discharge to the stack discharge. The ESP does not
> include the dust collector dirty condition pressure drop nor the fan
> discharge back draft damper pressure drop which shall be used with the
> ESP to size the fan. Adjust brake horse power for 5500 ft. elevation
> operation.
>
> 2\. 1750 RPM industrial continuous duty, TEFC motor to operate on 480
> v/60 hz/3 phase.

3.  Non-overloading Type BC, SWSI.

J. Requirements for Staff Shop Dust Collector (DC-2) Exhaust Fan: The
basis of design is Attachment 2.

1.  2250 cfm @ 17.6" W.G. ESP @ standard conditions. The fan external
    static pressure (ESP) drop includes losses up to the dust collector
    inlet, losses from the dust collector outlet to the far inlet, and
    losses from the fan discharge to the stack discharge. The ESP does
    not include the dust collector dirty condition pressure drop nor the
    fan discharge back draft damper pressure drop which shall be used
    with the ESP to size the fan. Adjust brake horse power for 5500 ft.
    elevation operation.

> 2\. 1750 RPM industrial continuous duty, TEFC motor to operate on 480
> v/60 hz/3 phase.

3\. Non-overloading Type BC, SWSI.

K.  Fan Accessories

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1.  Discharge Backdraft damper.

> 2\. Vibration Isolation According to Section 15200.

2.03 [DUST COLLECTORS]{.underline}

> A. Plasma Spray Booth (DC-1): The basis of design is Attachment 4.
>
> 1\. General Description: The collector shall be an aspirated
> cartridge, continuously operating, self-cleaning type. Major sections
> shall be welded construction of minimum 11 & 12 gage steel. To prevent
> the possibility of leakage, bolted construction shall not be used. The
> collector shall consists of a bin vent section, hopper section with
> support legs, cartridges, pulse cleaning system, explosion vent,
> controls, and weatherproof electrical equipment and components.
>
> 2\. Housing: The Bin Vent shall contain the cartridge elements,
> reverse pulse cleaning system, clean air plenum and cartridge
> removal/replacement and sealing hardware, and a side-mounted inlet
> plenum box. The inlet plenum box shall be capable of accommodating
> either a side inlet opening or a top inlet. The plenum box shall
> contain an internal baffle for deflecting particles down into the
> hopper and designed for low inlet velocities. Provide a bolted blind
> off plate to cover the unused inlet. Each wall of the bin vent shall
> have at least one sprinkler head with a capped nipple on the outside
> (for connection by the Contractor.)
>
> 3\. Cartridges:
>
> Cartridges shall be installed vertically, and removed by sliding on
> tracks accessible by doors. Doors shall be reinforced by welded
> channels, and utilize a floating hinge with equibearing clamps to
> provide uniform pressure. Doors shall have neoprene. Cartridges shall
> be self positioning and entire row shall be locked and sealed in place
> by means of tracks which are cam locking bars with handles at the door
> end to easily lock/unlock the cartridges into place.
>
> Cartridges shall be of non-woven, synthetic (polyester) and cellulose
> media. Media shall have a minimum of 10% of polyester for strength and
> resistance to swelling in the presence of moisture/humidity. Media
> shall be corrugated into pleated cylinder design and bonded steel
> header plates at the top and bottom. Top header plate shall be
> rectangular so it is easily slid in/out on the cam bar tracks. The
> rectangular plate shall have metal tabs so that cartridges cannot
> accidentally be slid on top of each other. The gasket on top of the
> rectangular plate shall be a continuous, neoprene or silicone gasket.
> Split gaskets are not acceptable. Gasket shall not be directly exposed
> to the dirty air stream. Only one gasket per cartridge shall be used.
> Sealing and contact of cartridges shall be verified by line of sight
> viewing.
>
> There shall be a helical cord retainer on the outside of the cartridge
> to retain shape during backpulsing. This cord retains the cartridge
> shape and pleat spacing yet allows as much media to be open as
> possible. External metal screens and perforated metal are not
> acceptable as they block off media, and potentially may cause
> particulate to plug between screen and media. If screens and
> perforated metal are used, they must be internal to the cartridge.
>
> For cellulose/polyester cartridges, each cartridge shall have a
> minimum of 300 ft^2^ of media. Pleat depth shall not exceed 2" in
> depth. Unit shall have a total filter media area 7,200 ft^2^ as a
> minimum.
>
> 4\. Cleaning System:
>
> The pulse cleaning system shall include the educator tubes, blow
> pipes, internal piping, compressed air header, solenoid valves,
> diaphragm valves. Only one cartridge shall be cleaned per tube sheet
> opening. Eductor tubes shall be used, rather than venturis, for lower
> pressure drop. Clean, dry, and oil-free compressed air will be
> supplied at 90-1090 psig. Cleaning system controls shall include
> circuitry to ensure that the dust collector will not go into the
> cleaning cycle while the fan is operating ( after hours operation
> circuitry ).
>
> 5\. Clean Air Plenum:
>
> The clean air plenum shall have a top outlet designed for direct
> mounting a flanged, fan inlet. The clean air plenum shall also have
> another outlet on the side for additional flexibility if a remote fan
> is used. The unused outlet will be covered with a blind off plate and
> will serve as an inspection port for the clean side. Welded lifting
> lugs shall be provided.
>
> 6\. Hopper:
>
> The hopper section shall contain the hopper(s) and integral fabricated
> support legs. Hopper(s) shall accommodate 55 gallon drums via a
> transition, flex connector, slide gate (for isolation) and drum cover.
> Hopper wall angle shall be sufficient to prevent dust build up and
> bridging.
>
> 7\. Explosion Vent: Provide two resettable latch type explosion vents
> on opposite sides of the collector.
>
> 8\. Requirements:
>
> a\. Conditions as indicated in Para. 2.02 I.
>
> b\. 1.11: 1 air-to-filter ratio

9.  Finish: The collector shall be phosphatized, painted with zinc
    chromate primer and OSHA enamel top coat. Final color coat shall be
    approved by SNL.

10. A fire protection fitting shall be factory installed for future
    connection to a sprinkler system.

> B. Staff Shop Dust Collector (DC-2): The basis of design is Attachment
> 3.
>
> 1\. General Description: Self-supporting pull-through filter unit dust
> collector for installing in an unprotected outdoor location. Unit
> shall consist of housing, two hoppers for 55-gallon drum dust storage,
> sparkproof fan and motor, shaker mechanism, and all controls and
> utility connections for a complete working package at design
> conditions.
>
> 2\. Housing: Structurally self-supporting incorporating an angle iron
> framework and airtight, weatherproof enclosure panels of heavy gauge
> (minimum 12 ga) AISI 1010 cold rolled steel, structurally reinforced
> to operate at the specified system static pressure plus 20%.
>
> 3\. Fan: Fan and motor shall be located on the "clean air side" of the
> filter and shall be totally weatherproof. The fan shall be constructed
> of sparkproof A356-T6 aluminum alloy and rotate at a nominal speed of
> 3,600 rpm in a direct drive configuration. Motor shall be TEFC.
>
> 4\. Filter: The After Filter shall be high efficiency, fire retardant,
> cotton sateen filter media. It shall be in the form of 5-inch diameter
> filter tubes.
>
> 5\. Shaker: The motorized shaker mechanism shall be electrically
> operated and automatically controlled.
>
> 6\. Hopper: A double hopper arrangement shall be provided to permit
> dust collection into standard 55-gallon drums. Each hopper shall
> incorporate a positive seal clamp-on drum cover assembly. Provide 2
> new 55-gallon drums.
>
> 7\. Requirements:
>
> a\. Conditions as indicated in Para. 2.02.1.
>
> b\. 612 sq. ft. Of filter area in 64-5" diameter filter tubes.
>
> c\. 4:1 Air-to-filter ratio (cfm/sq. ft.) maximum.
>
> d\. Shaker motor: ½ hp, 120 1/60, 1800 rpm TEFC motor.

e.  Inlet: 13" 0 minimum.

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8.  Finish: The collector shall be phosphatized, painted with zinc
    chromate primer and OSHA enamel top coat. Final color coat shall be
    approved by SNL.

9.  A fire protection fitting shall be factory installed for future
    connection to a sprinkler system.

2.04 [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 all units level and plumb, in accordance with
> manufacturer\'s written instructions. Support units as described
> below, using the vibration control devices indicated.
>
> a\. Secure units to concrete pads as recommended by manufacturer.
>
> b\. Coordinate direction of discharge to eliminate the
>
> 2\. Arrange installation of units to provide access space 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 final height of unit for proper drum connection and removal.
>
> 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 SNL's
> Commissioning Authority directed by the General Contractor's Test
> Engineer.

3.06 [DEMONSTRATION]{.underline}

> A. Provide for a factory-authorized service representative to start-up
> equipment, to demonstrate, and to train personnel.
>
> END OF SECTION
>
> Except for Attachments 1 through 4