DaimlerChrysler Construction Standards

05/25/05

SECTION 15710 - HEAT EXCHANGERS

PART 1 - GENERAL

1.1  SUMMARY

  1. This Section includes shell-and-tube heat exchangers for HVAC Hot Water Heating applications.
  2. Plate and Frame heat exchangers for Coolant System applications.

1.2  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. Provide electrical, fluid and interlock drawings.
  2. Maintenance Data: For heat exchangers to include in maintenance manuals specified in Division1.

1.3  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.

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: (For hydronic Systems only)
  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. Plate-and-Frame Heat Exchangers:

a. Tranter type S3-HJ-30 plates (for all Kokomo Transmission Plant heat exchangers).

b. Alfa Laval Thermal Inc. Plate Heat Exchangers

c. API

d. Bell & Gossett

f. ITT Fluid Handling; Div. of ITT Fluid Technology Corp.

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.

2.3 PLATE-AND-FRAME HEAT EXCHANGERS

A.  Heat exchangers shall cool and maintain the coolant temperature at a constant supply temperature of 75 deg. F plus or minus 2 deg., to the cutting machines, when system is in full auto mode or as specified in OEM coolant data sheets.

B.  Provide plates of type 316 stainless steel with Viton gaskets. Frame size shall be large enough to accomplish a 25% improvement in cooling capacity by the addition of plates. Pipe connectors shall be grooved.

C.  Provide pneumatic activated 2-way modulating valve assembly for temperature control, where supply and return system are connected by end of line relief valves. Provide pneumatic activated 3 way modulating valve, where supply and return systems are not connected by end of line rflief valves. This modulating valve shall be placed on the “chilled water out” line. Provide temperature and pressure gauges on all pipe inlets and outlets.

D.  Provide drain valves at the lowest points and isolation valves at all connections label all pipe connection as “ chilled water In” , chilled water Out”, “Process coolant In” “Process Coolant Out”

E.  The heat exchangers shall be mounted on a skid that can be lifted via a fork truck. The skid shall include a NEMA – 12 electric enclosure with a local disconnect and all controls mounted, prepped and wired. Panel shall include a circuit breaker. The control RTD shall be mounted on the Process Coolant In” connection and wired to the controls. The heat exchanger shall be integrated into the filter controls so that the heat exchanger shuts off if the filter pumps shut off.

F.  Provide all extensions for pressure gauges and thermometer and RTD’S to allow for 2 inches thick insulation. Insulation shall be provided by installation contractor.

G.  Provide drip pan beneath plate & frame heat exchangers.

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. Plate-and-frame heat exchangers, install a Wye-strainer ahead of incoming condenser water or chilled water.
  4. Install balancing valves on chilled water or condenser water and process coolant piping.
  5. Install plate and frame heat exchangers downstream of super clean coolant filter systems.

3.3  CONNECTIONS

  1. Piping installation requirements are specified in other Division15 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 shell-and-tube heat exchangers.
  4. Install shutoff valves at shell-and-tube heat exchanger inlet and outlet connections.
  5. Install relief valves on shell-and-tube heat exchanger heated-fluid connection.
  6. Install vacuum breaker at shell-and-tube 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.

B Clean piping prior to plate and frame heat exchanger by flushing and bypassing the heat exchanger via temporary hose connections.

C. Where central piping has been previously cleaned provide temporary connections and perform cleaning on branch circuit only.

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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