Specifications

REGULAR CARE
14
Note: The solar storage tank may need to be drained during this service. After the completion of the service,
the solar storage tank will take some time to reheat the water by solar gain.
If this solar storage tank is installed with an integrated or remotely installed Rheem in-series continuous flow
gas booster, then for the booster‟s safe and efficient operation, it is recommended a five year service be
conducted on the gas booster. Another type of in-series booster may have its own recommended service
schedule. Refer to the Owner‟s Guide and Installation Instructions supplied with the booster water heater.
TEMPERATURE PRESSURE RELIEF VALVE
This valve is near the top of the water heater and is essential for its
safe operation. It is possible for the valve to release a little water
through the drain line during each heating period. This occurs as the
water is heated and expands by approximately 1/50 of its volume.
Continuous leakage of water from the valve and its drain line may
indicate a problem with the water heater (refer to “Temperature
Pressure Relief Valve Running” on page 20).
Warning: Never block the outlet of this valve or its drain line for any
reason.
Operate the easing lever on the temperature pressure relief valve once
every six months. It is very important you raise and lower the lever
gently.
DANGER: Failure to do this may result in the water heater cylinder
failing, or under certain circumstances, exploding.
Warning: Exercise care to avoid any splashing of water, as water
discharged from the drain line will be hot. Stand clear of the drain line‟s
point of discharge when operating the valve‟s lever.
If water does not flow freely from the drain line when the lever is lifted,
then the water heater must be checked. Phone Rheem Service or their
nearest Accredited Service Agent to arrange for an inspection.
The temperature pressure relief valve should be replaced at intervals
not exceeding 5 years, or more frequently in areas where there is a
high incidence of water deposits (refer to “Water Supplies” on
page 16).
EXPANSION CONTROL VALVE
In many areas, including South Australia, Western Australia and
scaling water areas, an expansion control valve is fitted to the cold
water line to the water heater. The expansion control valve may
discharge a small quantity of water from its drain line during the
heating period instead of the temperature pressure relief valve on the
water heater.
Operate the easing lever on the expansion control valve once every six
months. It is very important you raise and lower the lever gently.
The expansion control valve should be checked for performance or
replaced at intervals not exceeding 5 years, or more frequently in
areas where there is a high incidence of water deposits.
water
heater
drain
line
lift until water
flows from the
drain line –
lower gently