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SAVE A SERVICE CALL
18
TEMPERATURE PRESSURE RELIEF VALVE RUNNING
Normal Operation
It is normal and desirable this valve allows a
small quantity of water to escape during the
heating cycle. However, if it discharges more
than a bucket full of water in 24 hours, there
may be another problem.
Continuous dribble
Try gently raising the easing lever on the relief
valve for a few seconds (refer to “Temperature
Pressure Relief Valve” on page 12). 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 until the water heater is cold - then stops until
water reheats
The gas control must be turned off using the knob on top of the gas control
thermostat (refer to “Close Down Procedure” on page 36). Phone Aquamax
Service to arrange for inspection.
EXPANSION CONTROL VALVE RUNNING
If an expansion control valve is fitted in the cold water line to the water heater
(refer to page 29) it may discharge a small quantity of water instead of the
temperature pressure relief valve on the water heater. The benefit is that energy
is conserved as the discharged water is cooler.
CAN’T LIGHT THE PILOT FLAME
Is there gas to the water heater?
Check the gas isolation valve on the gas
supply line is open.
Is there a normal gas supply to the rest of
the premises?
Try lighting another gas appliance to check. If
there is no gas, call the gas supplier.
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