SAFETY, WARNINGS, INSTALLATION NOTES
10
Valve Operation
Continuous leakage of water from either valve and its drain line may indicate a
problem with the water heater. Refer to “Temperature Pressure Relief Valve or
Expansion Control Valve Running” on page 24.
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.
Operate the easing lever on the temperature
pressure relief valve and expansion control
valve once every six (6) months to clear any
deposits and ensure the valve and its drain line
are not blocked.
It is very important the lever
is raised and lowered gently.
Refer to “Minor
Maintenance Every Six Months” on page 16.
Warning:
Water discharged from the
temperature pressure relief valve drain line will
be hot. Exercise care to avoid any splashing of
water by standing clear of the drain line’s point
of discharge when operating either valve’s
easing lever.
Warning:
Failure to operate the easing lever on the relief valve once every
six (6) months may result in the water heater cylinder failing.
If water does not flow freely from the drain line when the lever is lifted, then the
water heater must be checked. Phone Rheem Service or their nearest Accredited
Service Agent to arrange for an inspection.
The temperature pressure relief valve should be replaced at intervals not
exceeding six (6) years and the expansion control valve should be checked for
performance or replaced at intervals not exceeding six (6) years. The checking
of the valves performance or replacement should occur more frequently in areas
where there is a high incidence of water deposits. Refer to “Water Supplies” on
page 18.
lift until water
flows from the
drain line –
lower gently
drain
line