Commissioning; Main Gas Pressure Regulator - Rinnai GHF4135N Operation & Installation Manual

Main Gas Pressure Regulator

Adjustment
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.
Pressure adjustments at gas cylinder regulator should be conducted as required to
ensure correct supply pressure to water heater as per AS/NZS 5601.
NOTE
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.
Test the spark gap only where there is no build up of gas.
WARNING
Rinnai Australia

COMMISSIONING

Figure 4 - Main Gas Pressure Regulator Adjustment
11 Operation & Installation Manual