COMMISSIONING
33
Notes:
•
If the burners extinguish and / or an error code starts to flash on the display, release the MIN and
adjuster buttons, close the hot tap, clear the error code, turn on the water heater and recommence
the procedure from Step 1.
•
If the adjuster button is released before Step 6, clear any error code (if displayed) and recommence
the procedure from Step 1.
•
To clear an error code, refer to
“Error Codes”
on page 12.
Maximum test point gas pressure
Refer to the rating label on the water heater for the maximum test point gas pressure.
Follow Steps 1 to 7 of the “Minimum test point gas pressure” procedure, but open the hot tap fully and
use the MAX button instead of the MIN button.
Note:
In Step 2, “3H” or “4H” will be shown on the LED display, depending on the model of the water
heater.
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.
•
Refit the front panel and screws to the water heater.
•
Close the hot tap.
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:
•
Switch off the electrical supply at the power outlet to the water heater (refer to note below).
•
Close the gas isolation valve at the inlet to the water heater
•
Close the cold water isolation valve at the inlet to the water heater.
•
Drain the water heater if there is a risk of freezing conditions occurring (refer to
“Draining The
Water Heater”
on page 34).
Note:
The frost protection system will be rendered inoperable if electrical power is not available at the
water heater. Damage caused by freezing due to the unavailability of power at the water heater is not
covered by warranty (refer to
“Warranty Exclusions”
on page 37). If the power has been switched off to
the water heater and there is a risk of freezing, then it is necessary to drain the water heater (refer to
“Draining the Water Heater”
on page 34).
