Specifications

SAVE A SERVICE CALL
20
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 14). 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 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 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.
IN-SERIES WATER HEATER OPERATING TOO FREQUENTLY
You may find that the in-series water heater operates more frequently than expected. This will occur when
the solar heated water temperature is lower than the temperature setting of the in-series water heater. This
may be experienced during periods of low solar energy gain or if there has been heavy hot water usage.
COLLECTOR GLASS
The Vulcan warranty DOES NOT cover breakage of solar collector glass. Check your household insurance
policy covers collector glass breakage.
Warning: No attempt should be made to remove or replace broken collector glass.
The collector glass is not offered as a replacement part. Should the solar collector require replacement,
contact Rheem Service or their nearest Accredited Service Agent.
NOISE FROM THE SOLAR COLLECTORS
This water heater is installed with higher performing selective surface solar collector(s). During periods of
higher solar radiation or lower hot water usage and the solar storage tank is full of hot water, the water
heater may undergo Over-temperature operation (refer to “Over-temperature operation” on page 5). If this
mode of operation has occurred and the circulator has deactivated, the water in the solar collector(s) will
continue to gain heat and increase in pressure when solar radiation is still available. This increase in heat
and pressure is greater when higher performing selective surface solar collector(s) are installed compared to
non-selective surface collector(s).
When a hot tap is opened, this pressure is released and the high temperature water may turn to steam
creating a sudden and loud rumbling noise and even a rattling or banging noise of the solar collector(s)
against the roof cladding material. This results from the higher level of solar radiation and the water in the
solar storage tank being at its maximum temperature and is not caused by a fault with the solar water heater.