Desuperheater Connection
and Plumbing Installation
GeoCool
1315 College Street Clarksville, TN 37040
Website: www.geo.cool Email: sales@geo.cool
Plumbing Installation
Notes: All Plumbing and piping connection must comply with local plumbing
codes.
Disconnect electrical power supply to water heater.
Turn off water supply going to water heater.
Drain water heater (open pressure relief valve.)
Inspect the dip tube in the water heater cold inlet for the check valve. If a check
valve is present, it must be removed or damage to the desuperheater circulator
will occur.
Remove drain valve and fitting from the water heater.
Thread the ¾” NPT x 3 ½” brass nipple onto the water heater drain port.
Attach the center port of the ¾” FPT tee to the opposite end of the brass nipple.
Attach the ½” SWT x ¾” MPT cooper adaptor to the side of the tee closet to the
unit.
Attach the drain valve on the tee opposite the adapter.
Cut the cold water IN line going to the water heater.
Insert the ¾” x ¾” x ½” reducing solder tee in line with the cold water line as
shown in Figures 2 and 3.
Install circulating Pump (3.0 – 4.0 gpm)
If the water heater is being connected to the unit with an internal desuperheater:
Attach the two ½” SWT x 1” MPT copper adapters to the DHW IN and DHW
OUT to the swivel connectors on the unit. (If the unit does not include swivel
connector for DHW connections, use appropriate size adapters-field supplied).
Desuperheater Connection
and Plumbing Installation
GeoCool
1315 College Street Clarksville, TN 37040
Website: www.geo.cool Email: [email protected]
Run interconnecting tubing from the DHW OUT (unit or external desuperheater)
to the adapter located on the tee at the bottom of the water heater (Step 7).
Run interconnecting tubing from DHW IN (unit or external desuperheater) to cold
IN water line tee installed in Step 10.
Install a vent coupling at the highest point of the interconnecting lines to prevent
air entrapment.
Turn on water supply to water heater.
Fill water heater.
Flush, fill all interconnecting lines.
Check carefully for leaks.
Insulate all exposed surfaces of connecting water lines to 3/8” closed cell
insulation.
Reconnect power supply to water heater.
