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REGULAR CARE
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 15).
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.
lift until water
flows from the
drain line –
lower gently
drain
line
water
heater
DANGER: Failure to do this may result in the water
heater cylinder failing, or under certain circumstances,
exploding.
If water does not flow freely from the drain line when
the lever is lifted, then the water heater should be
checked by your nearest Solahart Dealer.
The temperature 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 36).
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.
COLLECTOR GLASS
Ensure the glass on your solar collectors is free of dust, salt spray or any other matter, which may
reduce the effectiveness of the solar collectors. If the collector glass becomes dirty, hose down or if the
solar collectors are accessible, wash the collector glass with water and a soft brush when the solar
collectors are cool. Have any trees trimmed which may shade the solar collectors.