Technical data

REGULAR CARE
9
MAJOR FIVE YEAR SERVICE
It is recommended a major five year service be conducted on the water heater.
Warning: Servicing of a water heater must only be carried out by qualified personnel. Phone Rheem
Service or their nearest Accredited Service Agent.
Note: The five year service and routine replacement of any components, such as the anode and relief
valve(s), are not included in the Rheem warranty. A charge will be made for this work. Only genuine
replacement parts should be used on this water heater.
The major service includes the following actions:
Replace the temperature pressure relief valve.
Inspect and flush the expansion control valve (if fitted). If required, replace the valve.
Inspect and if required, replace the anodes.
If the anodes are not replaced, they should be replaced within three years of this service (refer to
“Anode Inspection and Replacement” on page 12).
Check and if necessary adjust the inlet gas pressure.
Check the piezo igniter, gas control and thermocouple.
Check the operation of and clean the pilot light and main burner.
Drain and flush the water heater if required.
In commercial applications where large volumes of hot water are used, sediment may build up on the
bottom of the cylinder and reduce the heating efficiency. In extreme cases, particularly in areas of high
water sediment, draining and flushing out may be necessary.
Visually check the unit for any potential problems.
Inspect all connections.
Check the drain line from the safe tray (if one is installed) is not blocked.
Note: The water heater may need to be drained during this service. After the completion of the service, the
water heater will take some time to reheat the water. Hot water may not be available for a while.
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.