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23
COMMISSIONING
TO FILL AND TURN ON THE WATER HEATER
The gas pilot or burner must not be lit until the water heater is filled with
water.
• Open all of the hot water taps in the house (don’t forget the shower).
• Open the cold water isolation valve fully to the water heater.
Air will be forced out of the taps.
• Close each tap as water flows freely from it.
• Check the pipe work for leaks.
• Open the gas isolation valve fully.
• Check the gas pipe work for leaks.
• Light the water heater (refer to “Lighting the Water Heater” on page 24).
Warning: Upon completion of the installation and commissioning of the water
heater, leave this guide with the householder or responsible officer.
DO NOT
leave this guide inside of the cover of the water heater, as it may
interfere with the safe operation of the water heater or ignite when the water
heater is turned on.
GAS INLET PRESSURE
IMPORTANT – CHECK the gas supply pressure at the inlet to the water heater
with the water heater and all other gas burning appliances in the premises
operating (burners alight). The minimum gas supply pressure is:
Natural Gas 1.13 kPa Propane 2.75 kPa
Town / TLP 0.75 kPa Butane 2.75 kPa
If this minimum cannot be achieved, it may indicate the meter or the gas line to
the water heater is undersized. It is important to ensure that an adequate gas
supply pressure is available to the water heater when other gas burning
appliances, on the same gas supply, are operating.
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:
• Shut down the gas control (refer to “Close Down Procedure” on page 27).
• Close the gas isolation valve at the inlet to the gas control.
• Close the cold water isolation valve at the inlet to the water heater.