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MAINTENANCE REQUIREMENTS
SERVICING
Warning: Servicing of a gas water heater must only be carried out by authorised personnel.
For peak performance it is suggested that the water heater be serviced by your nearest Rheem Service
Department prior to the winter period where light to medium hot water usage occurs, and six monthly
where medium to heavy usage occurs.
If Servicing is performed once a year, refer to "Annual Service" on page 106. If servicing is performed
at six monthly intervals, rotate between "Annual Service Procedure" and "Six Monthly Service
Procedure" on page 106. Refer to page 106 for "5 Year Service Procedure".
Only genuine replacement parts must be used on this water heater.
PRESSURE RELIEF VALVE
The pressure relief valve is located at the rear of the water heater and is essential for its safe operation.
It is possible for the pressure relief 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 pressure relief valve and its drain line may indicate a problem
with the water heater (refer to "Pressure Relief Valve Running" on page 13).
Warning: Never block the outlet of the pressure relief valve or its drain line for any reason. Operate the
easing lever on the pressure relief valve once every six months. It is very important you raise and
lower the lever gently.
Warning: Failure to do this may result in the water heater failing.
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 pressure relief 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 (refer to "Water
Supplies" on page 18).
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 heating system. The expansion control valve
may discharge a small quantity of water from its drain line during the heating period instead of the
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.
STORAGE TANKS (IF FITTED)
Refer to the owners' guide and installation instructions supplied with the storage tank for details on
regular care required.
17
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