AquaMAX CG20 Series - Manual (Page 50)

COMMISSIONING
50
Maximum test point gas pressure
Refer to the rating label on the water heater for the maximum test point gas pressure.
Follow Steps 10 to 16 of the
“Minimum test point gas pressure” procedure on page 48, but open the hot tap
fully and use the MAX button instead of the MIN button. It may be necessary to open two or three hot taps
fully, depending upon the model of water heater and the incoming cold water temperature.
Note: In Step 11
, “3H” (CG20 series) will be shown on the controller display.
After setting the minimum and maximum test point gas pressures:
Close the hot tap.
Remove the manometer and refit and tighten the test point screw.
Open a hot tap again so the burners ignite.
Test for gas leaks.
Close the hot tap.
Turn off the controller by pressing the on / off button.
Switch off the electrical supply at the power outlet to the water heater
Disconnect the controller cable from the remote terminal screws.
Reconnect the cables from the controllers (if they have been installed) in the premises to the remote
terminal screws (refer to
“Connecting the Controller(s) to the Water Heater” on page 45).
Refit the front panel and screws to the water heater.
Clearing Error Code
If an error code does appear on the LED display during the commissioning process, it will be necessary to
clear the error in order to complete the installation.
To clear an error code:
turn off the controller by pressing the on / off button
switch off the electrical supply at the power outlet to the water heater
check the gas isolation valve at the gas inlet to the water heater is fully open
wait five (5) minutes
switch on the electrical supply at the power outlet to the water heater
turn on the controller by pressing the on / off button