Specifications

COMMISSIONING
59
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site or
where the premises is vacant, then:
Switch off the electrical supply at the power outlets to the solar storage tank and in-series gas booster
(refer to note below).
Close the gas isolation valve at the inlet to the water heater.
Close the cold water isolation valve at the inlet to the water heater.
Drain the in-series gas booster if there is a risk of freezing conditions occurring (refer to “Draining The
Water Heater” on page 60).
Notes:
The frost protection system of the in-series gas booster will be rendered inoperable if electrical power is
not available at the gas booster. Damage caused by freezing due to the unavailability of power at the in-
series gas booster is not covered by the Vulcan warranty.
If the power has been switched off to the in-series gas booster and there is a risk of freezing, then it is
necessary to drain the gas booster (refer to “Draining the Water Heater” on page 60).
Refer to “Terms of the Vulcan Warranty” on page 63.