Heat Exchangers for HVAC ME- Building Group

SECTION 235700 - HEAT EXCHANGERS FOR HVAC

PART 1 - GENERAL

1.1  RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section.

1.2  SUMMARY

  1. This Section includes shell-and-tube heat exchangers for HVAC Hot Water Heating applications.

1.3  SUBMITTALS

  1. Product Data: Include rated capacities; shipping, installed, and operating weights; furnished specialties; and accessories for each type of product indicated. Indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.
  2. Maintenance Data: For heat exchangers to include in maintenance manuals specified in Division1.

1.4  QUALITY ASSURANCE

  1. Product Options: Drawings indicate size, profiles, performance, and dimensional requirements of heat exchangers and are based on the specific equipment indicated.
  2. ASME Compliance: Fabricate and label heat exchangers to comply with ASME Boiler and Pressure Vessel Code: SectionVIII, "Pressure Vessels," Division1.

1.5  WARRANTY

  1. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of domestic-water heat exchangers that fail in materials or workmanship within specified warranty period.
  2. Failures include, but are not limited to, the following:
  3. Structural failures including heat exchanger, storage tank, and supports.
  4. Faulty operation of controls.
  5. Deterioration of metals, metal finishes, and other materials beyond normal use.
  6. Warranty Periods: From date of Substantial Completion.
  7. Shell-and-Tube, Domestic-Water Heat Exchangers:

1)  Tube Coil: One year.

2)  Other Components: One year.

PART 2 - PRODUCTS

2.1  MANUFACTURERS

  1. Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
  2. Shell-and-Tube Heat Exchangers:
  3. Amtrol, Inc.
  4. Armstrong Fluid Handling; Div. of Armstrong International, Inc.
  5. Baltimore Aircoil Co.
  6. Dunham-Bush, Inc.
  7. ITT Fluid Handling; Div. of ITT Fluid Technology Corp.
  8. Patterson-Kelley Co.; Div. of Harsco Corp.
  9. Taco, Inc.

2.2  SHELL-AND-TUBE HEAT EXCHANGERS

  1. Configuration: Two pass, U-tube.
  2. Shell and Head Materials: Steel shell and cast-iron head.
  3. Tube and Tube Sheet Materials for HVAC service: Seamless, 3/4-inch OD copper tubes with steel tube sheets.
  4. Piping Connections: Flanged-shell and head ports for HVAC application; threaded shell and head ports for Domestic Water Heating application.

PART 3 - EXECUTION

3.1  EXAMINATION

  1. Examine areas for compliance with requirements for installation tolerances and for structural rigidity, strength, anchors, and other conditions affecting performance of heat exchangers.
  2. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2  HEAT EXCHANGER INSTALLATION

  1. Install heat exchangers according to manufacturer's written instructions.
  2. Install shell-and-tube heat exchangers on steel base with saddle supports with provisions to drain shell.

3.3  CONNECTIONS

  1. Piping installation requirements are specified in other Division23 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.
  2. Maintain manufacturer's recommended clearances for service and maintenance. Install piping connections to allow service and maintenance of heat exchangers.
  3. Install piping with flanged connections at heat exchangers.
  4. Install shutoff valves at heat exchanger inlet and outlet connections.
  5. Install relief valves on heat exchanger heated-fluid connection.
  6. Install vacuum breaker at heat exchanger steam inlet connection.

3.4  CLEANING

  1. After completing system installation, including outlet fitting and devices, inspect exposed finish. Remove burrs, dirt, and construction debris and repair damaged finishes.

3.5  COMMISSIONING

  1. Verify that heat exchangers are installed and connected according to the Contract Documents.
  2. Adjust flows and controls to deliver specified performance.
  3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

END OF SECTION

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Revision Date: 01/21/14 Project & Bid Package

File name: 235700 HEAT EXCHANGERS FOR HVAC