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SAVE A SERVICE CALL
TEMPERATURE PRESSURE RELIEF VALVE OR EXPANSION CONTROL VALVE
RUNNING
•
Normal Operation
It is normal and desirable the temperature
pressure relief valve or expansion control
valve (if fitted) allows a quantity of water to
escape during the heating cycle. This
quantity should be equal to approximately
1/50 of the hot water used, as water
expands by this volume when heated.
However, if it discharges more than a
bucket full of water in 24 hours, there may
be another problem.
The expansion control valve will discharge water instead of the temperature
pressure relief valve as it has a lower pressure rating. A benefit is that energy
is conserved as the discharged water is cooler. This valve is installed in the
cold water line to the water heater (refer to the
on page 32).
•
Continuous dribble
Try gently raising the easing lever on the relief valve for a few seconds (refer
"Relief Valves"
to
matter and clear the fault. Release the lever gently.
•
Steady flows for long period (often at night)
This may indicate the mains water pressure sometimes rises above the
designed pressure of the water heater. Ask your installing plumber to fit a
pressure limiting valve.
Warning: Never replace the relief valve with one of a higher pressure
rating.
•
Heavy flows of hot water from the temperature pressure relief valve until
water heater is cold - then stops until water reheats
The water heater must be switched off at the switchboard. Phone your
Rheem Service Centre to arrange for an inspection.
on page 9). This may dislodge a small particle of foreign
22
cold water connection diagram
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