Chrysler LLCConstruction Standards

12/17/04

SECTION 15761 - AIR COILS

PART 1 - GENERAL

1.1SUMMARY

  1. This Section includes the following:
  2. Hot-water coils
  3. Chilled-water coils.
  4. Steam coils.
  5. Refrigerant coils.

1.2SUBMITTALS

  1. Product Data: Include rated capacities of selected models; pressure drop; shipping, installed, and operating weights; and installation instructions; for each type of product indicated.

1.3QUALITY ASSURANCE

  1. Comply with ARI410, "Standard for Forced-Circulation Air-Cooling and Air-Heating Coils," for components, construction, and rating.
  2. Certify coils to ARI410, "Standard for Forced-Circulation Air-Cooling and Air-Heating Coils."

PART 2 - PRODUCTS

2.1MANUFACTURERS

  1. Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
  2. Water Coils:
  3. Aerofin Corporation.
  4. Carrier Corporation.
  5. Dunham-Bush, Inc.
  6. Heatcraft Inc.; Heat Transfer Division.
  7. Trane Co. (The).
  8. USA Coil and Air.
  9. Steam Coils:
  10. Aerofin Corporation.
  11. Carrier Corporation.
  12. Dunham-Bush, Inc.
  13. Heatcraft Inc.; Heat Transfer Division.
  14. Trane Co. (The).
  15. USA Coil and Air.
  16. Refrigerant Coils:
  17. Aerofin Corporation.
  18. Carrier Corporation.
  19. Dunham-Bush, Inc.
  20. Heatcraft Inc.; Heat Transfer Division.
  21. Lennox Industries, Inc.
  22. Trane Co. (The).
  23. USA Coil and Air.

2.2HOT-WATER AND CHILLED-WATER COILS

  1. Description: Continuous circuit drainable coil fabricated to ARI 410.
  2. Piping Connections: Threaded, on same end.
  3. Tubes: Copper, complying with ASTMB75
  4. Tube Diameter: 0.50 inch OD.
  5. Wall Thickness: 0.025 inches.
  6. Rows: As scheduled.
  7. Fins: Aluminum with fin spacing, as scheduled.
  8. Fin and Tube Joint: Mechanical bond.
  9. Headers: Galvanized steel or seamless copper tube with brazed joints, prime coated. Provide drain and vent connections on the connection nozzles.
  10. Frames: ASTM A525 G60 galvanized-steel channel frame.
  11. Ratings: Design tested and rated according to ASHRAE33 and ARI410.
  12. Working Pressure Ratings: 200 psig, 325 degF.
  13. Source Quality Control: Test to 450 psig air pressure for burst protection, and to 250 psig for leakage failure.

2.3STEAM COILS

  1. Description: Distribution header coil fabricated to ARI410, with threaded steam supply and condensate connections.
  2. Connections: Same end.
  3. Tubes: Red brass, complying with ASTMB111.
  4. Tube Diameter: 0.625 inch.
  5. Minimum Tube Thickness: 0.020 inch.
  6. Fins: Aluminum with fin spacing as indicated on drawings.
  7. Fin and Tube Joint: Mechanical bond.
  8. Headers: Cast iron with drain and air vent tappings, or fabricated galvanized steel with brazed joints, prime coated].
  9. Frames: Galvanized-steel channel frame.
  10. Ratings: Design tested and rated according to ASHRAE33 and ARI410.
  11. Working Pressure Ratings: 100 psig, 400 deg F.
  12. Source Quality Control: Test to 300 psig, and to 200 psig underwater.

2.4REFRIGERANT COILS

  1. Description: Coil designed for specified refrigerant, fabricated to ARI410, connected with soldered or brazed fittings.
  2. Capacity Reduction: Circuit for face control.
  3. Tubes: Copper, complying with ASTMB75.
  4. Tube Diameter: 0.625 inch.
  5. Fins: Aluminum with fin spacing, as indicated on the drawings.
  6. Fin and Tube Joint: Mechanical bond.
  7. Suction and Distributor: Seamless copper tube with brazed joints.
  8. Frames: Galvanized-steel channel frame.
  9. Ratings: Design tested and rated according to ASHRAE33 and ARI410.
  10. Working Pressure Rating: 300 psig.
  11. Source Quality Control: Test to 450 psig, and to 300 psig underwater.

PART 3 - EXECUTION

3.1EXAMINATION

  1. Examine ducts, plenums, and units to receive air coils for compliance with requirements for installation tolerances and other conditions affecting coil performance.
  2. Examine roughing-in for piping systems to verify actual locations of piping connections before coil installation.
  3. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2INSTALLATION

  1. Install coils level and plumb.
  2. Install coils in metal ducts and casings constructed according to SMACNA's "HVAC Duct Construction Standards, Metal and Flexible."
  3. Install stainless-steel drain pan under each chilled-water coil.
  4. Construct drain pans to comply with ASHRAE62.
  5. Construct drain pans to extend beyond coil length and width and to connect to condensate trap and drainage.
  6. Extend drain pan 5 inches upstream from coil face.
  7. Extend drain pan 10 inches downstream from coil face.
  8. Extend drain pan under coil headers and exposed supply piping.

3.3CONNECTIONS

  1. Piping installation requirements are specified in other Division15 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.
  2. Install piping adjacent to coils to allow service and maintenance.
  3. Unless otherwise indicated, connect piping with unions and shutoff valves to allow coils to be disconnected without draining piping. Refer to piping system Sections for specific valve and specialty arrangements.

3.4ADJUSTING

  1. Straighten bent fins on each air coil.

3.5CLEANING

  1. After completing system installation, including outlet fitting and devices, inspect exposed finish. Remove burrs, dirt, and construction debris and repair damaged finishes.
  2. Clean coils using materials and methods recommended in writing by manufacturers, and clean inside of casings and enclosures to remove dust and debris.

END OF SECTION

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