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TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
4. Loosen the two lower screws slightly. When water is below the heating element level,
refit the cold water supply pipe.
5. Remove the two lower screws and withdraw the heating element carefully, making sure
the loop does not catch and open up inside the storage tank.
6. Clean around the cylinder fitting, fit gasket to replacement heating element and insert
into water heater.
Note:
Ensure the element is installed in the same orientation.
7. Reassemble in reverse of the above.
8. Restore the cold water supply and purge air through hot taps, close each hot tap as
water runs freely.
9. Check the heating element for leaks.
10. Refit the access cover.
11. Restore power supply to the water heater.
Tank Sensor
1.
Isolate the power supply 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 on page 62.
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. For Rheem, Everhot and Solahart storage tanks, remove the heat pump module.
Follow steps 6
– 8 of the „Heat Pump Module Removal‟ procedure on page 62.
5. Disconnect the tank sensor wiring plug from the controller (refer to diagram on page
6.
Stud Mount Type:
Remove the lower electrical access cover from the storage tank.
Undo the retaining nut and remove the tank sensor from the locating stud.
NOTE
:
When fitting the replacement sensor insure the grey heat transfer pad is in place.
Reassemble in reverse order of above
External Jacket Mount Type:
Remove the securing screw.
The shaft of the sensor assembly is keyed and the hole in the storage tank jacket is
slotted
– rotate the sensor assembly until the sensor shaft keys align with the
storage tank jacket slots.
Withdraw the sensor assembly.
Remove the protective cap from the new sensor assembly.
Insert the new sensor assembly in the hole in the storage tank jacket, so that the
sensor shaft keys align with the storage tank jacket slots.
Rotate the sensor assembly so that the securing screw holes align.
Install the securing screw.
7. Reassemble in reverse order of steps 1 to 5 above.
