COMMISSIONING
30
BURNER GAS PRESSURE
It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. To
check and if necessary adjust the operational gas pressures, the electrical supply to the water heater must
be switched on, the burners ignited and hot water must be flowing from a hot tap.
Warning:
The removal of the front panel will expose 240 volt wiring. Take care not to touch wiring
terminals.
Note:
The temperature of the water entering the in-series gas booster must be below 58°C, otherwise the
gas burners will not ignite and the operational gas pressures cannot be measured.
Minimum test point gas pressure
– 20 litre models
A temperature controller is required to be connected to the water heater as part of the procedure to check
and if necessary adjust the minimum and maximum test point gas pressures. The minimum and maximum
test point gas pressure readings will be displayed on the controller.
The controller can be either a standard or Deluxe controller of either a Kitchen (standard PN 299853, Deluxe
PN 299861) or Bathroom1 (standard PN 299854, Deluxe PN 299862) type and connects to the water heater
using either a Kitchen controller cable (PN 299856) or a Bathroom controller cable (PN 299857).
Refer to the rating label on the water heater for the minimum test
point gas pressure.
1.
Close any hot taps and ensure the burners are not operating.
2.
Switch off the electrical supply at the power outlet to the
water heater.
3.
Remove the screws holding the front panel to the jacket.
4.
Gently disengage the front panel and pull forward to remove
from the water heater.
5.
Locate the burner pressure test point on the main burner
manifold
Remove the test point screw and washer from the test
point orifice.
Connect the manometer.
6.
Connect a controller to the water heater.
Connect the cable to the controller.
Depending upon the type of controller to be used, the
cable is connected either by the terminal screws on the
back of the Kitchen controller or by the cable connector
on the back of the Bathroom1 controller.
Connect a cable lug to each of the remote controller
terminals. The cable has two cable lugs.
The two remote controller terminals are adjacent to each
other and located at the top right of the printed circuit
board (PCB
), to the right of the label marked „REMOTE
CONTROLLER TERMINAL‟.
The cable connections are non-polarised.
Ensure the terminal screws are seated firmly.
Warning:
Do not confuse the remote controller
terminals with the two 100 V terminals under the label
flap marked „DANGER 100 V DISCONNECT POWER‟
at the bottom right of the PCB.
