Chrysler LLC Construction Standards

12/17/04

SECTION 15487 - DOMESTIC WATER HEAT EXCHANGERS

PART 1 - GENERAL

1.1  SUMMARY

  1. This Section includes the following for domestic water systems:
  2. Instantaneous water heaters.
  3. Accessories.

1.2  SUBMITTALS

  1. Product Data: For each type and size of heat exchanger. Include rated capacities; shipping, installed, and operating weights; furnished specialties; and accessories.
  2. Shop Drawings: Detail heat-exchanger assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.
  3. Product Certificates: Signed by manufacturers of heat exchangers certifying that products furnished comply with requirements.
  4. Maintenance Data: For heat exchangers to include in maintenance manuals specified in Division1.
  5. Warranties: Special warranties specified in this Section.

1.3  QUALITY ASSURANCE

  1. Source Limitations: Obtain same type of heat exchangers through one source from a single manufacturer.
  2. Product Options: Drawings indicate size, profiles, and dimensional requirements of heat exchangers and are based on specific units indicated. Other manufacturers' products complying with requirements may be considered.
  3. ASME Compliance: Fabricate and label heat-exchanger to comply with ASME Boiler and Pressure Vessel Code: SectionVIII, "Pressure Vessels," Division1.
  4. ASHRAE Standard: Comply with performance efficiencies prescribed in ASHRAE90.1, "Energy Efficient Design of New Buildings except Low-Rise Residential Buildings."

1.4  WARRANTY

  1. Special Warranty: Written warranty, executed by manufacturer agreeing to repair or replace components of heat exchangers that fail in materials or workmanship within specified warranty period.
  2. Warranty Period: Five years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1  MANUFACTURERS

  1. Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
  2. Instantaneous Water Heaters:
  3. Adamson Global Technology Corp.
  4. Aerco International, Inc.
  5. Ajax Boiler, Inc.
  6. Cemline Corp.
  7. HESco Industries, Inc.
  8. Leslie Controls, Inc.
  9. Patterson-Kelley Co.
  10. PVI Industries, Inc.
  11. RECO Industries, Inc.
  12. Sellers Engineering Co.

2.2  INSTANTANEOUS WATER HEATERS

  1. Description: Packaged, commercial, indirect-fired water heater with negligible storage capacity; and heat exchanger for heating water with steam.
  2. Construction: ASME code, with 150-psig-minimum working-pressure rating. Include nozzle or other arrangement for heat exchanger.
  3. Heat Exchanger: Steel shell with cast-ironheads for steam and 2-pass U-tube, dual-wall 3/4-inch OD copper inner and outer water tubes.
  4. Pressure Rating: 160-psig.
  5. Tappings: Factory fabricated of materials compatible with water heater shell for piping connections. Attach tappings to shell before testing and labeling.
  6. NPS2and Smaller: Threaded ends according to ASMEB1.20.1, pipe threads.
  7. NPS2-1/2and Larger: Flanged ends according to ASMEB16.5 for steel and stainless-steel flanges and according to ASMEB16.24 for copper and copper-alloy flanges.
  8. Temperature Control: Adjustable thermostat that operates steam-control valve and that is capable of maintaining outlet-water temperature within 4degFof setting.
  9. Safety Control: Automatic, high-temperature-limit cutoff device or system.
  10. Miscellaneous Components: Strainer, steam-control valve, steam trap, valves, and piping.
  11. Stand: Factory fabricated for floor mounting.

2.3  HEAT-EXCHANGER ACCESSORIES

  1. Pressure Relief Valves: ASME rated and stamped and complying with ASMEPTC25.3. Include pressure setting less than heat-exchanger working-pressure rating.
  2. Vacuum Relief Valves: Comply with ASMEPTC25.3. Furnish for installation in piping.
  3. Exception: Omit if heat exchanger has integral vacuum-relieving device.

PART 3 - EXECUTION

3.1  HEAT-EXCHANGER INSTALLATION

  1. Install heat exchangers on concrete bases, level and plumb, according to layout drawings, original design, and referenced standards. Maintain manufacturer's recommended clearances. Arrange units so controls and devices needing service are accessible.
  2. Anchor heat exchangers to substrate.
  3. Install pressure relief valves in water piping. Extend relief valve outlet with water piping in continuous downward pitch and discharge onto closest floor drain.
  4. Install vacuum relief valves in cold-water-inlet piping.
  5. Install heat-exchanger drain piping as indirect waste to spill into open drains or over floor drains. Install hose-end drain valves at low points in water piping for water heaters that do not have tank drains. Refer to Division15 Section "Plumbing Specialties" for drain valves.
  6. Install thermometers on heat-exchanger outlet piping. Refer to Division15 Section "Meters and Gages" for thermometers.

3.2  CONNECTIONS

  1. Piping installation requirements are specified in other Division15 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.
  2. Install piping adjacent to heat exchangers to allow service and maintenance.
  3. Connect hot- and cold-water piping with shutoff valves and unions. Connect hot-water-circulating piping with shutoff valve, check valve, and union.
  4. Connect steam and condensate piping with shutoff valves and unions.
  5. Make connections with dielectric fittings where piping is made of dissimilar metal.

3.3  FIELD QUALITY CONTROL

  1. In addition to manufacturer's written installation and startup checks, perform the following:
  2. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment and retest until satisfactory results are achieved.
  3. Verify that piping system tests are complete.
  4. Check for piping connection leaks.
  5. Check for clear relief valve inlets, outlets, and drain piping.
  6. Check operation of circulators.
  7. Test operation of safety controls, relief valves, and devices.
  8. Adjust hot-water-outlet temperature settings. Do not set above 120 degF unless piping system application requires higher temperature.

END OF SECTION

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