Rheem GAS BOOSTED SOLAR WATER HEATER - Manual (Page 15)

SAVE A SERVICE CALL
15
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.
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 water heater must be switched off at the isolating switch or switchboard. Phone your nearest
Solahart Dealer to arrange for an 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.
PRESSURE RELIEF VALVE DISCHARGING
A pressure relief valve is incorporated into the gas booster controls. This valve protects the gas
booster, by allowing water to escape, in the event of excessive pressure build up in the waterways.
• Normal operation
A small volume of water may discharge from the bottom of the gas booster when a hot tap is
suddenly closed.
• Continuous dribble
A continuous dribble may indicate the water supply pressure is above the design pressure for the
gas booster. If so, a pressure limiting valve must be installed on the cold water supply pipe to the
water heater (refer to
“Mains Water Supply” on page 19).
FAN CONTINUES TO RUN AFTER WATER HEATER OPERATION STOPS
It is the normal operation of the gas booster for the fan to continue running after heating of the water is
finished. The fan may run for up to six minutes after the burners extinguish, to prepare for the next
ignition.