23 40 00_HVAC Air Filters.pdf

SECTION 23 40 00

HVAC AIR CLEANING DEVICES

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PART 1 - GENERAL

1.01 DESCRIPTION

A. Provide Air Cleaning Devices as specified herein and as shown on the Drawings.

B. Materials characteristics and size shall be as indicated on the Drawings.

C. Related Work: The requirements of Section 23 05 00, Common HVAC Materials and

Methods, also apply to this section.

1.02 SUBMITTALS

A. Submit catalog data, construction details and performance characteristics for all manufactured materials.

B. Submit installation, operating, and maintenance data.

PART 2 - PRODUCTS

2.01 DUST COLLECTOR

A. Pulse-jet cartridge collector system as shown on the plans. Basis of design is AAF PulsePak Prime model 10-2H.

B. The pulse-jet cartridge collector shall be supplied in factory assembled unit incorporating one module sized to meet airflow capacity per design documents. Maximum allowable air to filter area ratio shall be 2.6 to 1.

C. Overall construction shall be of painted hot rolled steel with 3/16" thickness. Paint system is one coat alkyd primer on inside and outside, followed by textured alkyd finish coat on exterior, suitable for 1000 hour salt spray rating. Standard Gray color.

D. The inlet shall enter through the top front of the housing and above the filters to ensure proper down flow of incoming air. Crossflow and vertically mounted filters will not be accepted.

E. Cartridges shall be “vee” shaped with pleats in the vertical direction to ensure the media does not create “shelves” on which the dust can settle. Metal sides shall be on top and bottom of the filter to ensure that dust does not blind off media on top of the cartridge.

Round, or of similar shape, cartridges will not be accepted. The cartridges shall have only one sealing surface to ensure proper sealing of the filter. Each cartridge shall have at least 552 sq. ft. of nanofiber flame retardant media providing MERV 15 rated filtration.

The collector shall come with an ASHRAE SPC199 third party verified test report.

F. Outlet is located through the bottom of the rear clean air plenum to ensure proper downflow through the collector.

G. The hoppers are integral to the housing. Support legs shall be designed for seismic zone

IV specifications, 130 mph winds and provide 48" clearance under the hopper for proper dust discharge.

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H. Hopper and housing are fully welded together. The housing shall be rated for -20" w.g.

operating pressure and have a Pred of at least 0.32 bar (128" w.g.). Hopper shall be designed with a steep 60-degree funnel terminating in a 12" diameter drum connection device without gates or doors to permit immediate downflow of dislodged dust into the dust disposal container.

I. The unit shall be designed to accommodate two standard 55 gallon drums. Furnish “hard pipe” barrel top adaptors that are suitable for a collector with explosion venting. The barrel top adaptor shall not use flex hose or a “positive seal” barrel top adapter. The barrel top adapter shall be rated for 70 inch w.g. internal pressure such that the adaptor withstands pressures generated from an explosion. The barrel top adaptor shall be bolted to the collector hopper and bolted to the collection drum to ensure airtight seal. Barrel top adaptor shall have quick release clamp. The barrel top adaptor for basis of design shall be American Air Filter model “XPBTA”.

J. Access to the filters shall be through the front of the collector via large, gasketed, hinged doors. The doors shall incorporate latches for easy open/close so that no tools shall be needed for filter access and replacement. Provide with Access Platform with Galvanized Bar Grating and Ladder for filter cartridge access. Include handrail around the platform.

K. The explosion vent shall be located on top of the unit so that the fireball is directed in a safe magnetic burst sensor on the explosion vent shall be included to shutdown collector if activated. Weather cover for the explosion vent is included. Explosion vent shall have a total open vent area of 7.27 sq. ft.

L. Pulse solenoids shall activate 1.5" diaphragm valves on the top of each pulse pipe.

Solenoid valves shall be rated NEMA 4. Solenoid valve silencers shall be supplied to reduce noise levels during pulses to 85 dba at 3 feet.

M. All components ship loose for field installation. Field assembly of the legs and bracing, housing section, fan, wiring, and pulse controller will be required.

2.02 DUST COLLECTOR CONTROLS AND POWER

A. Master control panel shall be provided in NEMA 4X housing with UL 508 label on entire panel. Include Dwyer model DCT1010 programmable differential pressure controller,10 point digital pulse timer board, and DCP100 pressure transducer. Capable of timed, pressure demand, and downtime automatic cleaning. LED’s for pressure controller shall be mounted inside housing front. Pressure controller shall have LED display for filter pressure differential indication, LED for programming and to indicate setpoints with alarm status. Pressure display viewable from exterior of control panel.

B. 460/3/60 single point power connection rated with fusing rated for 65K AIC.

C. Rotary disconnect switch, On/Off selector switch, power on /fan running lights, and three position cleaning mode selector switch surface mounted on panel face.

D. VFD for fan motor operation.

E. Automatic on-line cleaning system shall be activated by differential pressure across the filters.

F. Control interlock relays to operate remote contactors. Contactors (by other division) disable power to shop tool circuits until dust collector is enabled.

2.03 DUST COLLECTOR FAN

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A. Class 4, arrangement 4 ground mount blower shall be provided with single width, single inlet housing, backward inclined fan wheel in direct drive configuration. AMCA “C” fan rating with backward inclined wheel.

B. Turned, ground, and polished AISI-1045 shaft assures smooth operation. Rust preventive coating is applied to shaft.

C. Accessories include: Heavy duty Carbon Steel Class 4 construction, drain with plug, bolted and gasketed access door. Bearings are heavy duty, self-aligning, relubricatable, ball bearings. Minimum average bearing life (AFBMA L-10) 100,000 hours at max RPM.

Inlet and outlet are flanged for ease of connection to ductwork. Inlet bell is designed for smooth air entrance into the wheel inlet.

D. Configuration is upblast discharge, counter clockwise rotation.

E. 30 HP TEFC VFD rated motor, premium efficiency.

F. 460/3/60 voltage.

2.04 DUCT SILENCERS

A. A fan inlet silencer shall be provided for installation between collector housing on clean air side of all filtration and fan inlet with performance to maintain 65 dBA or less inside the shop during full airflow conditions. Maximum pressure drop of 0.30 –inch WG.

B. A fan outlet silencer shall be provided for installation in return air ductwork. Silencer shall be 84 inches long with performance to maintain 65 dBA or less inside shop during full airflow conditions. Maximum air pressure drop of 0.30-inch WG.

C. Silencers are shipped separate for field installation.

2.05 DUST COLLECTOR ACCESSORIES AND CONTROLS

A. High Speed Abort Gate:

1. Gate is reset by manual handle located on gate as per NFPA 664.

2. Welded steel and bolted design 10 ga mild steel construction with powder coated safety Yellow finish.

3. Electromagnetic 110Vdc gate locking system

4. Spring action gate with a reaction time of less than 500 milliseconds.

5. High temperature seal bolted around the gate

6. Directional air output housing without bird screen

7. Hansentek or approved

B. Spark detection and extinguishing system.

1. Spark detectors shall be supplied for a single zone system, highly sensitive and reacting without delay upon detection of any infrared radiation for temperature up to 176 degrees F. System shall be U.L. labeled.

2. Single sparks or showers of sparks are detected immediately and transmit an electrical signal to the control panel to shut down entire system.

3. Manual reset is then required for system operation.

4. For use only in dark closed environments where no ambient light can reach the detector.

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5. Two detectors located 180 degrees apart are required at the exhaust and discharge ducts.

a. First set of detectors shall be located indoors 180 degrees apart on main inlet duct downstream of last branch entrance.

b. Second set of detectors shall be located outdoors 180 degrees apart in return duct on discharge side of dust collector and prior to abort gate.

c. Single sparks or showers of sparks are detected immediately and electrical signal transmitted to control panel to shut down entire system.

Manual reset required for system operation.

d. Detectors provided with quick release brackets for ease of inspection and cleaning. Detectors without “self test” capability are not allowed.

e. 120 volt powered system. Contractor to field connect wiring to spark detectors, abort damper, and collector control panel.

f. Water spray nozzle with solenoid and strainer remote mounted in duct downstream of last branch entrance to main duct. Minimum 25 feet distance from water spray nozzle to upstream spark detectors to allow reaction time.

g. Spark detection panel initiates water spray upon spark detection by either set of detectors.

h. See Division 21 for connection of water to spray nozzle

i. See Division 26 for wiring of spray system, control panel, spark detectors and abort gate.

6. Hansentek AN104 system is basis of design. Flamex FUX-3001 with FLE 3000 control panel is approved system.

PART 3 - EXECUTION

3.01 EQUIPMENT INSTALLATION

A. Air Handling Equipment Installation and Arrangement: Install and arrange as shown on Drawings. Comply with the manufacturer's recommendations for installation, connection, and start-up.

B. Equipment Access Panels: Locate free of all obstructions such as ceiling bars, electrical conduit, lights, ductwork, etc.

C. Filters: Install specified filters in unit prior to start-up.

D. Install and arrange equipment as shown on the Drawings and as recommended by the equipment manufacturer.

E. Piping: Refer to applicable sections for piping, ductwork, insulation, painting, etc.

F. Manufacturer's Field Service: Engage a factory authorized service representative to inspect paint booth and dust collector components and equipment installation, to include electrical and piping connections. Report results to A/E in writing. Inspection must include a complete startup checklist to include (as a minimum) the following: Completed Start-Up Checklists as found in manufacturer's IOM.

G. Engage a factory authorized service representative to perform startup service on paint booth and dust collector. Clean entire unit. Measure and record electrical values for voltage and amperage. Refer to Division 23 “Testing, Adjusting and Balancing” and comply with provisions therein.

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H. Engage a factory authorized service representative to train Owner's maintenance personnel to adjust, operate and maintain the paint booth and dust collector. Refer to Division 01 Section Closeout Procedures and Demonstration and Training. Provide onsite training for each type of system on how to operate factory controls to change set points, clear alarms, and all other operating parameters. Review the entire sequence of operation and show parameters affecting the sequence and how to alter them.

END OF SECTION