Commissioning; Main Gas Pressure Regulator; Adjustment For Lpg; To Set The Lpg Tpp - Rinnai GHF4135L Operation & Installation Manual

Main Gas Pressure Regulator

Adjustment for Natural Gas:
The main burner pressure must be set at installation and should not need re-adjustment. The
minimum Natural Gas Supply Pressure is 1.13 kPa. Test point pressure (TPP) on the gas control
needs to be set at 1 kPa.
The pressure is best checked by connecting a water manometer or equivalent to the test point nipple
on the gas control. The test point pressure must comply with the value on the Data Plate.
If adjustment is necessary, proceed as follows:
1. Remove the large dial ("A") from the top of the Gas Control.
2. Locate the regulator adjustment screw "PR ADJ".
3. Light the burner. Rotate adjustment screw clockwise to increase, or anti- clockwise to decrease
pressure.

Adjustment for LPG:

The main burner pressure must be set at installation and should not need re-adjustment. The
minimum LPG supply is 2.75 kPa. The burner TPP needs to be set at 2.70 kPa.

To set the LPG TPP:

1. Bypass the SIT Gas Control Integrated Pressure Regulator by removing knob A (refer to Figure
5) and adjusting the "NO P.R." screw clockwise, the screw will click once the integrated
pressure regulator is bypassed (see Figure 6).
Figure 5 - Adjustment for LPG
2. Connect a manometer to the Burner TPP position on the SIT Gas Control (see Figure 6).
3. Remove the Seal Cap on the Maxitrol Regulator and using a Philips head screw driver rotate the
adjusting screw until the TPP described above is achieved.
4. Replace SIT Gas Control A and the Seal Cap on the regulator
Ignition System (Spark Gap) - Check the gap between the spark electrode and the pilot burner is
3-5 mm and adjust as necessary. Push the igniter button to test for a spark.
Pressure adjustments at gas cylinder regulator should be conducted as requested
to ensure correct supply pressure to water heater as per AS/NZS 5601.
WARNING
Test the spark gap only where there is no build up of gas.
Rinnai Australia

COMMISSIONING

Figure 4 - Main Gas Pressure Regulator Adjustment
Figure 6 - Adjusting the "NO P.R." Screw
11 Operation & Installation Manual