Specifications

TM024 Premier Loline Solar Drain back Service Instructions REV: A
D.O.I: 12/12/2007
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
50
Gas Booster – 596 Models Only (Procedure 19)
A quantity of hot water may discharge from the gas booster and tank and gas
booster hot pipes during this procedure. Wear Personal Protective Equipment
to prevent scalds or burns.
Wear Personal Protective Equipment when conducting step 3 of this
procedure to reduce the risk of electric shock. Refer to Rheem Safety
Procedure on electrical testing.
1. Isolate power, gas and water supplies to the water heater.
2. Relieve pressure from the water heater through the T&PR valve or a hot tap.
3. Remove the upper electrical access cover (refer to procedure 5) and confirm with a
multi-meter between the Active and Neutral, then Active and Earth, then Neutral
and Earth terminals of the terminal block that voltage is not present.
4. Disconnect the gas booster wiring at the terminal block.
5. Disconnect the gas booster gas supply line from the gas inlet connection of gas
booster.
6. Disconnect the gas booster cold water supply pipe from the cold-water inlet connection
of gas booster by unscrewing brass union.
7. Unscrew the gas booster water drain plug and relief valve and drain the gas booster.
8. Disconnect the gas booster hot water supply pipe from the gas booster hot water outlet
connection by unscrewing brass union.
9. Unscrew single screw retaining gas booster lower bracket to tank gas booster support
bracket.
10. To remove gas booster, lift gas booster up from tank approximately 50mm to unhinge
gas booster upper bracket and pull away from tank.
11. Remove upper half of brass unions removed in steps 6 & 8 from gas booster and
install in replacement gas booster using thread tape.
12. Unscrew and remove two screws on replacement gas booster upper bracket, rotate
bracket 180º and refix bracket to gas booster utilising the two screws removed
previously.
13. Complete reassembly by reversing steps 1 – 10 above.
14. When complete test gas booster operation and check for leaks.
Mechanical Thermostat – 591 Models Only (Procedure 20)
Wear Personal Protective Equipment when conducting step 2 of this
procedure to reduce the risk of electric shock. Refer to Rheem Safety
Procedure on electrical testing.
1. Isolate power to the water heater and remove the upper electrical access cover (refer
to procedure 5).
2. Confirm with a multi-meter between Active and Neutral, then Active and Earth,
then Neutral and Earth terminals of the terminal block that voltage is not present.
3. Disconnect the wiring to the thermostat.
4. Slide the thermostat out from under the retaining clamp.
5. Remove any scale from the cylinder surface.
6. Fit the replacement thermostat under the clamp.
7. Reconnect the wiring as per the circuit wiring diagram on page 6 or 7 depending upon
thermostat type (EWT or ST).
8. Conduct an electrical insulation test. Refer to page 42.
9. Refit the access cover and restore the power supply.