Rheem Solar Hiline 52D180 Owner's Manual And Installation Instructions page 10

MAINTENANCE REQUIREMENTS
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
Pressure Relief Valve Running"
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 (6) months. Refer to
Six Months" on page 9. It is very important the lever is raised
and lowered 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.
If the relief valve lever is not readily and safely accessible, contact Rheem Service or their nearest Accredited
Service Agent. Do not attempt to climb onto a non-trafficable roof to operate the relief valve lever.
The temperature pressure relief valve should be replaced at intervals not exceeding five (5) years, or more
frequently in areas where there is a high incidence of water deposits (refer to
EXPANSION CONTROL VALVE
In many areas, including South Australia, Western Australia and scaling water areas, it is mandatory 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 (6) months. Refer to
Maintenance Every Six Months"
water does not flow freely from the drain line when the lever is lifted, then the water heater should be checked
by Rheem Service or their nearest Accredited Service Agent.
If the relief valve lever is not readily and safely accessible, contact Rheem Service or their nearest Accredited
Service Agent. Do not attempt to climb onto a non-trafficable roof to operate the relief valve lever.
The expansion control valve should be checked for performance or replaced at intervals not exceeding
five (5) years, or more frequently in areas where there is a high incidence of water deposits.
"Temperature
on page 16).
"Minor Maintenance Every
on page 9. It is very important the lever is raised and lowered gently. If
10
lift until water
flows from the
drain line –
drain
line
lower gently
"Water Supplies"
on page 12).
water
heater
"Minor