Solahart 151J, Руководство пользователя

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SAFETY, WARNINGS, INSTALLATION NOTES
7
Relief Valves
TEMPERATURE PRESSURE RELIEF VALVE
This water heater incorporates a temperature pressure relief valve
located near the top of the solar storage tank. 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
Solahart supply an expansion control valve with each thermosiphon
water heater system and this is fitted to the cold water line to the water
heater. In many areas, including scaling water areas, it is mandatory an
expansion control valve is fitted to the cold water line to the water
heater.
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
“Temperature
Pressure Relief Valve or Expansion Control Valve Running” on
page 15.
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.
The easing lever on the temperature pressure relief valve and expansion control valve should be operated 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 18.
If the relief valve easing lever is not readily and safely accessible, contact your nearest Solahart Dealer. Do not attempt to
climb onto a non-trafficable roof to operate the relief valve lever.
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.
DANGER: Failure to operate the easing lever on the relief valve once every six (6) months may result in the solar
storage tank cylinder failing, or under certain circumstances, exploding.
If water does not flow freely from the drain line when the lever is lifted, then the water heater must be checked. Phone your
nearest Solahart Dealer to arrange for an inspection.
The temperature pressure relief valve should be replaced at intervals not exceeding five (5) years and the expansion control
valve should be checked for performance or replaced at intervals not exceeding five (5) 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 16.
outlet /
drain
line
lift until water
flows from the
drain line –
lower gently