34
7.0ADJUSTMENT
7.1PILOT BURNER ADJUSTMENT
Adjust the pilot screw to provide properly sized flame. Turn in a clockwise direction to reduce the gas flow.
Inlet pressure can be checked by turning screw (A) counter- clockwise until loosened and then placing pressure gauge tubing over the test point. Gauge should read 7” (minimum 4.5”) water column for natural gas or 13” (11” minimum) water column for propane. Check that main burner is operating on “HI”.
Outlet pressure can be checked the same as above using screw (B). Gauge should read 3.5” water column for natural gas or 10” water column for propane. Check that main burner is operating on “HI”.
AFTER TAKING PRESSURE READINGS, TIGHTEN SCREWS FIRMLY TO SEAL. DO NOT OVER TORQUE. LEAK TEST.
PILOT
BURNER THERMOPILE
B A
OL |
|
| |
| N | O | |
| F | ||
HI | O | F | |
P | |||
|
| ||
|
| TOLI | |
P |
|
| |
I |
|
| |
TOL |
|
|
PILOT SCREW
39.3
7.2VENTURI ADJUSTMENT
This appliance has an air shutter that has been factory set open according to the chart below:
Regardless of venturi orientation, closing the air shutter will cause a more yellow flame, but can lead to carboning. Opening the air shutter will cause a more blue flame, but can cause flame lifting from the burner ports. The flame may not appear yellow immediately; allow 15 to 30 minutes for the final flame color to be established.
AIR SHUTTER ADJUSTMENT MUST ONLY BE DONE BY A QUALIFIED INSTALLER!
| GDS28 |
NG | 3/8” |
LP | 5/16” |
VENTURI
BURNER
AIR |
SHUTTER |
OPENING |
ORIFICE 
49.1
