Gas Supply
3.0
Installation
- GTD Series Installation, Operation, Maintenance and Parts Manual
30
Remove the lid to the valve compartment.
Open the pressure nipple (Figure 3.29-A) and connect pressure meter tube.
Remove the cap over the adjusting screws on the gas valve pressure regulator. Place a 10mm spanner
(wrench) on the outer adjusting nut and a screwdriver on the black inner adjusting screw. The outer
adjusting nut (Figure 3.29-C) regulates the high fire; whereas the black inner screw (Figure 3.29-B)
regulates the low fire.
NOTE:
During adjustment of the nut (C), the screw (B) must be kept in position
otherwise it will turn together with the nut (C).
Adjust high fire first by turning the nut (C). Pressure is increased by turning clockwise.
Replace the burner control box lid, then operate the heater to check high fire burner pressure.
Repeat this procedure from point 4 until proper burner pressure is achieved. Also, repeat this
procedure to adjust low fire burner pressure by turning screw (B).
After low fire adjustment, confirm that the high fire pressure value did not change.
Replace all caps and plugs, close the pressure nipple carefully and secure the burner control box lid.
Adjusting Burner Pressure:
Figure 3.29 • Burner Pressure Adjustment
A
B
C
Burner
Compartment
Manometer
2
3
4
1
5
6
7
8
