Technical data

32
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 building (don‟t forget the showers) and supply cock(s) and valve(s)
in the system.
Open the isolation valves fully on the cold and hot water branches to the water heater(s) installed in a
bank.
Open the cold water isolation valve on the cold water line to the water heater(s).
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(s) fully.
Check the gas pipe work for leaks.
Light the water heater(s) (refer to “Lighting the Water Heater” on page 33).
Check the pipe work again for leaks, when the system has reached its working temperature.
Warning: Upon completion of the installation and commissioning of the water heater, leave this guide
with the householder or a 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.
Explain to the householder or a responsible officer the functions and operation of the water heater.
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 35).
Close the gas isolation valve(s) at the inlet to the gas control(s).
Close the cold water isolation valve on the cold water line to the water heater(s) to shut down the entire
system, or;
Close the isolation valves on the cold and hot water branches to shut down an individual water heater in
a bank.