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Enertech Global IOM, XT Models
Section 6: Desuperheater Installation
Desuperheater Installation
Units that ship with the desuperheater function also
ship with a connection kit.
Note: Desuperheater capacity is based on 0.4 GPM
Flow per nominal ton at 90°F entering hot water
temperature.
Note: 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.
⚠ 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 UP TO 130 DEGREES
FROM THE DESUPERHEATER COULD RAISE TANK
TEMPERATURES TO UNSAFE LEVELS.
CONTENTS OF THE DESUPERHEATER FITTING KIT:
• (1) p/n 20D052-01NN, Installation Instructions
• (1) p/n 33P211-01BN, 3/4”x 3/4”x 3/4” FPT Brass
Tee
• (1) p/n 33P210-01NN, ¾” Boiler
Drain Valve
• (1) p/n 11080005001, ¾” MPT x 3-1/2” Brass
Nipple
• (3) p/n 11080006001, ½” SWT x ¾” MPT Copper
Adaptor
• (1) p/n 11080007001, ¾” x ¾” x ½” SWT Copper
Tee
Plumbing Installation
NOTE: All plumbing and piping connections must
comply with local plumbing codes.
Note: Copper is the only approved material for
desuperheater piping.
TIP: Measure the distance above the oor or shelf
that the water heater is setting 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 tting from water
heater.
5. Thread the ¾” MPT x 3-1/2” nipple into the water
heater drain port. Use Teon 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. See Figure 1.
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. See
Figure 2.
11. Thread the remaining two ½”SWT x ¾”MPT
copper adaptors into the ¾” FPT ttings 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.
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