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The working gas pressure on the water heater is electronically controlled and factory set.
Under normal circumstances it does not require adjustment during installation. The
pressure should be checked when the unit is installed and each time it is serviced to ensure
that it is correct. Contact Rinnai before attempting to alter the gas pressure if you are
unsure of what to do. Incorrect adjustment can void the warranty.
1. Turn 'OFF' the gas supply.
2. Turn 'OFF' 230V power supply.
3. Remove the front cover from the appliance.
4. Check gas type dip switch no.1 of SW2 is in the correct position for the type of gas (Nat.
or LPG)* you are using. See Fig. 1
5. Attach pressure gauge to burner test
point. (Fig. 2)
6. Turn 'ON' the gas supply.
7. Turn 'ON' 230V power supply.
8. If remote controllers are fitted, turn the
unit 'ON' at the controller and select a
maximum delivery temperature.
9. Open a hot water tap fully. (CAUTION:
Ensure building occupants do not have
access to hot water outlets during this
procedure.) Wait for the unit to light.
* Simply changing the position of the dip switches will not convert the
unit from one gas type to the other. The conversion procedure requires
a change of injector manifold. Contact Rinnai or your supplier.
NOTE
GAS PRESSURE SETTING
37
Fig. 2
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