Enertech Global, LLC
19
WS Rev. E Models
Installation and Operations Manual
⚠
WARNING
⚠
TO AVOID SERIOUS INJURY, IT IS
RECOMMENDED THAT AN ANTI-SCALD MIXING
VALVE IS INSTALLED ON THE HOT WATER
SUPPLY LINE INTO THE HOME. EVEN THOUGH
HOT WATER TANK TEMPERATURES COULD
APPEAR TO BE SET AT LOWER LEVELS, HIGH
TEMPERATURE WATER FROM THE
DESUPERHEATER COULD RAISE TANK
TEMPERATURES TO UNSAFE LEVELS.
Desuperheater Installation
Units that ship with the desuperheater function also ship with
a connection kit. Installation of the kit and examples of
connection to the potable water system is described in the
following steps and drawings.
Notes:
•
Enertech Desuperheater water to refrigerant heat
exchangers are double walled and vented for use in
potable water systems.
•
ALL Enertech Global products meet the requirements of
NSF-372 (Lead Free).
•
Copper is the only approved material for desuperheater
piping.
•
Units that are shipped with a desuperheater do not have
the desuperheater pump wires connected to the
electrical circuit, to prevent accidentally running the
pump while dry. Pump has to be connected to the
electric circuit (master contactor) when the lines from
the water heater are installed & air is removed.
Plumbing Installation
All plumbing and piping connections must comply with local
plumbing codes.
TIP:
Measure the distance above the floor or shelf that the
water heater is sitting on, to where the drain valve is located.
This distance must be greater than one-half the width of the
tee you’re about to install, or you won’t be able to thread the
tee on to the water heater.
1.
Disconnect electricity to water heater.
2.
Turn off water supply to water heater.
3.
Drain water heater. Open pressure relief valve.
4.
Remove drain valve and fitting from water heater.
5.
Thread the ¾” MPT x 3-1/2” nipple into the water heater
drain port. Use Teflon tape, or pipe dope on threads.
6.
Thread the center port of the ¾” brass tee to the other
end of the nipple.
7. Thread one of the copper adaptors into the end of the
tee closest to the heat pump.
8. Thread the drain valve into the other end of the nipple.
9.
Above the water heater, cut the incoming cold water
line. Remove a section of that line to enable the
placement of the copper tee.
10.
Insert the copper tee in the cold water line.
11.
Thread the remaining two ½”SWT x ¾”MPT copper
adaptors into the ¾” FPT fittings on the heat pump,
marked HWG IN and HWG OUT.
12.
Run interconnecting ½” copper pipe from the HOT
WATER OUT on the heat pump, to the copper adaptor
located on the tee at the bottom of the water heater.
13.
Run interconnecting ½” copper pipe from the HOT
WATER IN on the heat pump, to the copper tee in the
cold water line.
14.
Install an air vent fitting at the highest point of the line
from step 13 (assuming it’s the higher of the two lines
from the heat pump to the water heater).
15. Shut off the valve installed in the desuperheater line
close to the tee in the cold water line. Open the air vent
and all shut off valves installed in the “hot water out”.
16.
Turn the water supply to the water heater on. Fill water
heater. Open highest hot water faucet to purge air from
tank and piping.
17.
Flush the interconnecting lines, and check for leaks.
Make sure air vent is shutoff when water begins to drip
steadily from the vent.
18.
Loosen the screw on the end of the despuerheater pump
to purge the air from the pump’s rotor housing. A steady
drip of water will indicate the air is removed. Tighten the
screw and the pump can be connected to the contactor
or terminal block.
19.
Install 3/8” closed cell insulation on the lines connecting
the heat pump to the water heater.
20.
Reconnect electricity to water heater.
Section 7: Desuperheater Installation