Specifications

COMMISSIONING
51
PRESET OUTLET TEMPERATURE SETTING
The factory preset outlet temperature setting of the water heater is:
CG20-60 series 60°C
CG20-50 series 48°C
If a temperature controller is connected to the water heater, this will override the preset outlet temperature
setting and the maximum temperature setting will be:
Maximum Outlet Temperature
CG20-60
series
CG20-50
series
Kitchen controller connected
60°C
48°C
Bathroom controller only connected
50°C
48°C
It is usually not necessary to adjust the factory preset outlet temperature setting of the water heater, unless
the customer has a particular requirement for this to be done or it is to be installed as an in-series gas
booster to a solar water heater.
Refer to “To Check or Adjust the Preset Outlet Temperature Setting” on page 52 to check or if required to
adjust the preset outlet temperature setting of the water heater.
Gas Booster for a Solar Water Heater
Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water. When this water heater is used as an in-series booster for a solar water heater it can satisfy
this AS 3498 requirement provided it is energised, the booster preset outlet temperature setting is 70°C, and
that a remote temperature controller is not used.
It will be necessary to check and if required to adjust the preset outlet temperature setting of the continuous
flow water heater when:
it is installed as an in-series gas booster to a solar water heater
it is an existing continuous flow water heater and a solar water heater is then installed.
Notes:
Consideration must be given to the delivery temperature to any ablution and public areas such as a
bathroom, ensuite or public amenities. Refer to “Hot Water Delivery” on page 29 and to “Schematics of
Two Temperature Zones Using A Temperature Limiting Device” on page 30.
The CG20-50 model water heaters, marked “THIS APPLIANCE DELIVERS WATER NOT EXCEEDING
50°C IN ACCORDANCE WITH AS 3498” on the front panel, must not be installed as an in-series gas
booster to a solar water heater, as water temperature greater than 50°C can be delivered from the water
heater contravening its compliance to AS 3498.