Rheem 850 Series Owner's Manual And Installation Instructions page 17

Gas domestic outdoor water heater
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SERVICE EVERY TWELVE MONTHS
For safe and efficient operation, it is recommended a service be conducted on
the water heater every twelve (12) months.
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 service and routine replacement of any components, if required, 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 annual service includes the following actions:
Check the operation of the temperature limiting valve (RheemPlus model)
Inspect and flush the temperature pressure relief valve.
Inspect and flush the expansion control valve (if fitted).
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.
Visually check the unit for any potential problems.
Inspect all connections.
MAINTENANCE REQUIREMENTS
17

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