Ground Heat Exchanger Piping

corrosion inhibitors are not contained in freeze protection solution in the

ground heat exchanger loop.

2.10.3

Ground Heat Exchanger Piping

Provide corrosion inhibitors acceptable to heat pump manufacturers with

concentrations suitable for each system[ and appropriate for the antifreeze

used].

PART 3

EXECUTION

3.1

INSTALLATION

3.1.1

Heat Pump System

Maintenance access to each piece of equipment shall not be compromised by

any type of piping, electrical conduit, or any other utility. Further,

install equipment in accordance with the manufacturer's written

installation instructions, including the following:

[Water-source water-to-air heat pumps - installation instructions]

[Water-source water-to-water heat pumps - installation instructions

]

[Closed Circuit Coolers - installation instructions]

[Plate Heat Exchangers - installation instructions]

[Heat Tape - installation instructions]

3.1.2

Connections to Existing Systems

Notify the Contracting Officer in writing at least 15 calendar days prior

to the date the connections are required. Obtain approval before

interrupting service. Furnish materials required to make connections into

existing systems and perform excavating, backfilling, compacting, and other

incidental labor as required. Furnish labor and tools for making actual

connections to existing systems. Flush existing systems in accordance with

paragraph entitled "Flushing the Ground Heat Exchanger" prior to making

connections.

3.2

ABOVEGROUND PIPING

Provide unions in piping to facilitate removal of heat pump for maintenance

or replacement. Test, inspect, and approve piping before covering or

concealing. Provide fittings for changes in direction of piping and for

connections. Make changes in piping sizes through tapered reducing

fittings; bushings will not be permitted. Install valves with stems

horizontal or above. Provide flanges or unions at valves, traps,

strainers, and connections to equipment; unions are not required in copper

tubing piping systems.

a.

Threaded Connections: Threaded joints shall be sealed with a

sealant compatible with the circulating fluid; use of Teflon tape

is not permitted. Do not thread metal pipe into plastic piping.

b.

Pipe Hangers and Supports: Install in accordance with MSS SP-69.

Provide additional pipe hangers and supports at in-line water

SECTION 15741N

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