Heat Pump Unit Water Piping - Sanden GS3-45HPA-US Installation Manual

Heat Pump Unit Water piping

ALL PIPING BETWEEN HEAT PUMP & TANK SHOULD BE ½" NO EXCEPTIONS

Connect the heat pump unit COLD supply to the tank unit fitting marked Cold Supply. –
½" NPT Connection (Certain early units may use ½" BSP connections).

Connect the heat pump unit HOT return to the tank unit fitting marked Hot Return – ½"
NPT Connection (Certain early units may use ½" BSP connections).

Connect the mains water supply to the lower fitting on the tank unit marked Cold Water
Inlet.

Connect the hot water supply pipe to the top of the tank unit marked Hot Water Outlet.

Install the PR valve to the fitting on the tank unit marked PR valve, pipe from PR valve
directly to a Building drain; do not install any shut off valve between PR valve and
Building drain.

Run water through the pipe(s) to remove any debris inside before connecting the
pipe(s).

After all the piping connections are completed, run water through the system.

Remove the air from the system according to the instructions below on Page 15.

Make sure all the necessary devices are mounted to the pipes as shown in diagram.
If the heat pump unit piping is kinked or clogged or the air inside was not removed
during the test operation, temperature of the supplied hot water may become
inconsistent.
Figure 6: System piping (Typical System piping)
Sanden Heat Pump – Installation Manual
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