Rheem Solar Hiline 52D180 Owner's Manual And Installation Instructions page 16

SAVE A SERVICE CALL
WATER NOT HOT ENOUGH
You may find that due to heavy hot water usage or low solar energy gain the water temperature may be lower
than normally expected. Ensure the booster is being used as advised. If a timer is installed, you will need to
carefully plan your use of the booster heating unit to boost the water temperature on such occasions.
Temperature Redistribution: A lower water temperature may be noticed in the morning when the booster
heating unit has not been energised overnight. This temperature reduction is caused by the transfer of heat
energy overnight from the hot water in the upper part of the solar storage tank to the cold water in the lower
part of the solar storage tank. This effect is often perceived as heat loss, but is actually the redistribution of
stored heat more evenly over the entire contents of the solar storage tank. This heat is not lost to the system.
Temperature redistribution is more prevalent the more hot water is used the night before or if the booster switch
or time clock is left off over-night and in particular may be experienced during periods of low solar energy gain,
such as during the cooler months. Temperature redistribution can also occur during days of lower solar
radiation particularly during the cooler months if power to the booster heating element is not available, or the
booster switch or time clock is left off.
If higher temperature water is required, particularly in the morning, then use of the booster heating unit is
necessary to raise the temperature of the water in the top section of the cylinder.
If the water heater is connected to an Off-Peak (overnight) electricity supply, then switching to an Extended
Off-Peak (overnight and day) supply should be considered. If a timer is being utilised, then a timed boost period
in the afternoon prior to the evening usage should be considered.
"Booster Control"
Refer also to
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
If readily and safely accessible, try gently raising the easing
lever on the relief valve for a few seconds (refer to
"Temperature Pressure Relief Valve"
dislodge a small particle of foreign matter and clear the fault.
Release the lever gently.
If the relief valve lever is not readily and safely accessible,
contact Rheem Service or their nearest Accredited Service
Agent. Do not attempt to climb onto a non-trafficable roof to
operate the relief valve lever.
 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 water heater must be switched off at the isolating switch or switchboard. Phone Rheem Service or
their nearest Accredited Service Agent 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 the
diagram on page 42) 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.
on page 7.
on page 10). This may
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cold water connection