Checking the burner pressure
NOTE. If the gas supply inlet pressure is in the correct range it is unlikely that the burner
pressure will need adjustment.
1. Turn off all hot outlets to ensure the heater is not operating.
2. Turn off both the electrical and gas supply
1.
BEWARE
Removing the heater front cover will expose 240V wiring and some
connections that are 240V at all times while the heater is switched on.
3. Remove front cover from heater case (4 screws). Be sure that the rubber gasket
around the exhaust flange is not dislodged.
Do not touch any components on the PCB even if the power is off as static electricity
can damage components.
4. Connect manometer to the burner pressure test point on the burner manifold.
SEE Diagram
5. Turn on electrical and gas supply
6. Press max gas switch FOR AT LEAST ONE SECOND. This will ensure max water
FLOW AND THEREFORE MAX GAS CONSUMPTION for several seconds.
When the water is turned off the unit reverts to normal mode.
7. Open at least 2 hot water outlets fully and ensure all burners ignite at maximum.
8. Check that the manometer reading is within the range specified on the data plate.
If adjustment is required refer to section headed “Adjusting burner pressure”
9. Re-assemble heater ensuring that the
• SIT Valve manometer test point sealing screw and washer have been refitted and
tightened.
• The clear cover over the burner pressure adjustment nut is in place.
VERY IMPORTANT
• The rubber exhaust flange gasket is correctly in place as the front cover is re-fitted
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Alliance Appliances Pty Ltd
Rapid 26
