bafbrwhq15785.pdf

SECTION 15785 REPAIR WING HEADQUARTERS, BLDG 706

AIR-TO-AIR ENERGY RECOVERY UNITS CRWU 06-2071

06/09/09 15785-1 BUCKLEY AFB

SECTION 15785 - AIR-TO-AIR ENERGY RECOVERY UNITS

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section includes the following:

1. Packaged energy recovery units.

B. Related Work Specified Elsewhere:

1. For control wiring and control devices connected to energy recovery units: SECTION

15900 - HVAC INSTRUMENTATION AND CONTROL.

1.02 REFERENCES:

A. Applicable Standards:

1. American Society for Testing and Materials (ASTM):

a. B88 - Seamless Copper Tube.

b. B88M - Seamless Copper Tube (Metric).

c. D1785 - Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated

Poly(Vinyl Chloride) (CPVC) Compounds.

2. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE):

a. 15 - Safety Code for Mechanical Refrigeration.

b. 84 - Method of Testing Air-to-Air Heat Exchangers.

3. National Fire Protection Association (NFPA):

a. 70 - National Electrical Code.

4. Underwriters Laboratories Inc. (UL):

a. 181 - Factory-Made Air Ducts and Air Connectors.

b. 486A - Wire Connectors and Soldering Lugs for Use with Copper Conductors.

c. 486B - Wire Connectors for Use with Aluminum Conductors.

1.03 SUBMITTALS:

A. General: Submit the following as specified in SECTION 15050 - BASIC MECHANICAL

MATERIALS AND METHODS.

B. Product Data: Include rated capacities, furnished specialties, and accessories.

C. Field quality-control test reports.

D. Operation and Maintenance Data: For ERU to include in emergency, operation, and maintenance manuals.

1.04 QUALITY ASSURANCE:

A. Source Limitations: Obtain air-to-air energy recovery units through one source from a single manufacturer.

B. Product Options: Drawings indicate size, profiles, and dimensional requirements of air-to-air energy recovery units and are based on the specific system indicated. Refer to DIVISION 1.

C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

D. ASHRAE Compliance: Capacity ratings for energy recovery devices shall comply with

ASHRAE 84.

SECTION 15785 REPAIR WING HEADQUARTERS, BLDG 706

AIR-TO-AIR ENERGY RECOVERY UNITS CRWU 06-2071

BUCKLEY AFB 15785-2 06/09/09

E. NRCA Compliance: Roof curbs for roof-mounted equipment shall be constructed according to recommendations of NRCA.

1.05 COORDINATION:

A. Coordinate installation of roof curbs and equipment supports. These items are specified in

DIVISION 7 and on the construction drawings.

PART 2 - PRODUCTS

2.01 MANUFACTURERS:

A. In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:

1. Manufacturers: Subject to compliance with requirements, provide products by the manufacturers specified.

2.02 PACKAGED ENERGY RECOVERY UNITS:

A. Manufacturers:

1. BKM Energy & Environmental Products B. Housing:

1. Double-walled, insulated, air pressure tight casing assemblies. No through metal shall be allowed. Where dissimilar metals are used, they shall be dialectically isolated from one another to prevent galvanic action. All Seals and gaskets shall be easily changeable and constructed of EPDM rubber which is ultra violet and ozone stable and have a temperature range from –62 to +300 degree F.

2. Assembled panels shall be a minimum of 2-1/4” thick and shall be fabricated with the minimum 16-gauge solid exterior sheet and 16-gauge solid inside panel. Each panel shall have an integral formed channel of all four sides for added structural stability. Inner panels shall be sealed to each other using a double strip of non-hardening butyl rubber based sealant and mechanically fastened with 12-10x1 tek screws on 12” staggered centers.

3. Wall panels are to be fastened to the channel base by means of a 1” tack weld on 12” centers, staggered from inside to outside of the housing. All seams and joints are finish caulked with non-hardening silicone based sealant.

4. Interior panel insulation shall be 3 lb density fiberglass. Panel U-valve shall not exceed

0.07 Btu hr/sq. ft/F. UL fire rating, flame spread 10-20, fuel contributed 10-15, smoke developed 0-20.

5. Roof panels will be of the same construction as the wall. Exterior unit roof construction will be pitched 1/8” per foot for water drainage. Roof skin will be 1-1/2” standing seam on maximum centers to minimize seams. A drip edge will be provided around the entire perimeter. Separate drip edges will be provided above each access door.

6. Exterior finish shall consist of a prime coat and two enamel finish coats, manfacturer’s standard color.

C. Damper Section:

1. Bearings shall be sealed and will not require any additional maintenance when shaft sizing of less than 1” are utilized.

2. EPDM Rubber will be used for seals. Seals are to be attached without the use of adhesives for ease of maintenance and replacement.

3. Damper blade is to be insulated and of a double walled, single blade design.

SECTION 15785 REPAIR WING HEADQUARTERS, BLDG 706

AIR-TO-AIR ENERGY RECOVERY UNITS CRWU 06-2071

06/09/09 15785-3 BUCKLEY AFB

D. Heat Recovery Device:

1. Energy Transfer Cassettes shall be pure aluminum plates of 1100 alloy with structural frames constructed of 16-gauge, 304 stainless steel.

2. The energy transfer cassettes consist of 63 corrugated plates per module and have a minimum thickness of .0276 inch, maximum .032 inch per plate. System will not require freeze protection to –40 F under standard applications.

3. Energy transfer cassettes shall be easily accessible, removable and cleanable with a high-pressure wash if ever required.

E. Controls:

1. An integral control panel shall be mounted on top of the damper section in an enclosed weather tight compartment with damper control timer.

F. Piping and Wiring: Fabricate units with space within housing for piping and electrical conduits. Wire motors and controls so only external connections are required during installation.

PART 3 - EXECUTION

3.01 INSTALLATION:

A. Install units on roof curbs.

B. Install units with clearances for service and maintenance.

3.02 CONNECTIONS:

A. Duct and fan installation requirements are specified in other DIVISION 15 Sections. Drawings indicate general arrangement of ducts, fittings, and specialties.

B. Ground equipment according to DIVISION 16.

C. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.

3.03 FIELD QUALITY CONTROL:

A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect field-assembled components and equipment installation, including piping and electrical connections. Report results in writing.

1. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

2. Adjust seals and purge.

3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

4. Set initial temperature and humidity set points.

5. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

B. Remove malfunctioning units, replace with new units, and retest as specified above.

3.04 DEMONSTRATION:

A. Engage a factory-authorized service representative to train Government's maintenance personnel to adjust, operate, and maintain units. Refer to DIVISION 1.

END OF SECTION 15785