22
COMMISSIONING
All water heaters are tested and adjusted before dispatch from the factory, however further adjustments may
become necessary because of local conditions.
TO TURN ON THE WATER HEATER
Open
all of the hot taps in the house (don’t forget the shower).
Open the cold water isolation valve fully at the inlet 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.
Open a hot tap.
The water heater will operate automatically.
Check to ensure the flow from each connected hot tap is sufficient to operate the water heater.
The minimum operating flow rate for all models is 3.0 litres per minute.
Check and if required adjust the preset outlet temperature
setting of the water heater.
Refer to
“Preset Outlet Temperature Setting”
on page 25.
Set the seasonal water flow adjustment valve (located at the
underside of the water hea
ter) to the “Summer” position.
Upon completion of the installation, it may be necessary to set
the seasonal water flow adjustment valve to another more
appropriate position to suit the time of the year and incoming
cold water temperature.
To complete the installation, it is necessary to check the gas supply pressure at the inlet to the water heater
(refer to
“Inlet Gas Pressure”
on page 22), the minimum test point pressure and the maximum test point
pressure (refer to
“Burner Gas Pressure”
on page 24).
Explain to the householder or a responsible officer the functions and operation of the water heater.
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.
INLET GAS 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
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.
Note:
The maximum gas supply pressure shall not exceed 3.5 kPa. A gas pressure regulator shall be installed
upstream to the water heater if the gas supply pressure may exceed this value. Damage to the water heater
due to high gas pressure is not cover by the Rheem warranty.
water flow adjustment valve
(manual seasonal adjustment)
