MAINTENANCE REQUIREMENTS
15
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”
on page 19).
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
on page 14.
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 your nearest Solahart
Dealer to arrange for an inspection.
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
page 16).
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 months. Refer to
on page 14.
It is very important the lever is raised and lowered gently.
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 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.
water
heater
drain
line
lift until water
flows from the
drain line
–
lower gently
