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Water heater size
Do you have the correct size water heater for your requirements?
The sizing guide in the Aquamax sales literature suggests average sizes that
may be needed.
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 35).
•
Continuous dribble
Try gently raising the easing lever on the
relief valve for a few seconds (refer to
on page 9). This may dislodge a
small particle of foreign 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 Aquamax
Service to arrange for inspection.
