Heat Pump Module - Rheem 325 II Series Service Instructions Manual

Heat Pump Module

WARNING: The suction line brace MUST be fitted whenever the heat pump
is in operation – the suction line brace should never be removed from the
evaporator coil unless the evaporator coil is being replaced.
Heat Pump Module Removal
If the heat pump module is being removed for replacement, the following modifications
may be required.
Heat Pump Module Replacement: If replacing a heat pump module that does not have a
hot water braided hose with an angle fitting at the storage tank end, it will be necessary to
remove the elbow fittings and non-return valve from the storage tank (where fitted) and
replace them with ¾" x ½" reducing nipples.
1. Isolate power to the water heater.
2. For AquaMax storage tanks only, go to Step 6.
3. Remove the storage tank upper electrical access
cover and confirm
thermostat terminals 1 and 3 that voltage is not
present.
4. Remove the heat pump module access panel and
disconnect the power wiring and tank sensor wiring
between the storage tank and heat pump module at the
controller (refer to the diagram opposite).
5. Where a ball valve and check valve are fitted to the
storage tank, isolate the water supply to the water heater,
relieve pressure from the water heater through the T&PR
valve or a hot tap and close the ball valve.
Where a ball valve and check valve are not fitted to the storage tank, drain the water
heater. Refer to „Draining the Water Heater‟ procedure on page 56
6. If the condensate drain has been extended, disconnect the drain at the joint between
the heat pump module condensate drain and the extension pipework.
7. Remove the 6 screws / nuts (3 each side) retaining the heat pump module to the
storage tank.
8. Slightly lift the heat pump module to disengage the lower locating tabs from the storage
tank and remove the module to the limit of the flexible hoses.
9. For AquaMax storage tanks only, carry out Steps 3 – 0 above.
10. Disconnect the heat pump module inlet and outlet hoses from the storage tank and lift
the heat pump module clear.
Outer Jacket
1. Isolate power to the water heater.
2. For AquaMax storage tanks, remove the heat pump module. Follow steps 6 – 8 of the
„Heat Pump Module Removal‟ procedure above.
3. Remove the storage tank upper electrical access cover and confirm with a multi-
meter across thermostat terminals 1 and 3 that voltage is not present.
4. Follow steps 6 – 8 of the „Heat Pump Module Removal‟ procedure above.
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
with a multi-meter across
Service. All printed copies are deemed uncontrolled.
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