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•
Servicing of a water heater must only be carried out by qualified personnel.
Phone your Rheem Service Centre.
•
Only a person qualified to install or service a water heater can drain the water
heater, if this is required.
•
Do not modify this water heater.
RELIEF VALVES
Temperature Pressure Relief Valve
This
water
heater
temperature pressure relief valve located
near the top of the water heater. This valve
is essential for the water heater's safe
operation.
It is possible for the valve to discharge a
quantity of water through the drain line
during each heating period. This quantity
should be equal to approximately 1/50 of the
hot water used, as water expands by this
volume when heated.
Expansion Control Valve
It is mandatory an expansion control valve is fitted to the cold water line to the
water heater to comply with Clause G12 of the New Zealand Building Code,
unless the water heater is installed as a push through installation.
The expansion control valve will discharge the quantity of water from its drain
line during the heating period instead of the temperature pressure relief valve as
it has a lower pressure rating.
Valve Operation
Continuous leakage of water from either valve and its drain line may indicate a
problem with the water heater. Refer to
Expansion Control Valve Running"
Warning: Never block the outlet of either valve or their drain lines for any
reason. A relief valve drain must be left open to atmosphere, and be installed in
a continuously downward direction.
In locations where water pipes are prone to freezing, the relief valve drain line
must be insulated and not exceed 300 mm in length before discharging into a
tundish through an air gap.
SAFETY, WARNINGS, INSTALLATION NOTES
incorporates
a
"Temperature Pressure Relief Valve or
on page 22.
9
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