PILOT FLAME CHARACTERISTICS
The correct pilot flame (Figure 12) will be blue, extending past the thermocouple. The flame will surround the thermocouple just below the tip.
Natural gas pilots require adjusting when the inlet gas pressure is above 5” w.c. (1.245kPa). Remove the pilot cover screw on the control valve (Figure 3), and turn the adjustment screw clockwise to reduce flame. Replace pilot cover screw to eliminate gas leaking at that control valve opening.
LP gas (propane) will not require adjustment.
After use, cleaning may be required for the proper flame.
THERMOCOUPLE
BURNER |
SPARK�PILOT
ELECTRODE
STANDING PILOT
IP-Model Pilot
This heater is using a Honeywell “Smart Valve” system for intermittent pilot ignition.
On a call for heat by the thermostat this control turns on a 24 volt mini hot surface ignitor which lights a pilot that in turn lights the main burner. The gas valve used in this system is a step opening which opens at a lower pressure for ignition and then steps to a full inlet pressure of 4” pressure on Natural gas and 10” pressure on LP gas.
Pilot Flame Adjustment
The pilot flame should envelop 3/8 to 1/2 inch (10 to 13mm) of the tip of the flame rod. See Figure 12.
To adjust:
1.Remove the pilot adjustment cover screw.
2.Turn the inner adjustment screw clockwise
to decrease
or counterclockwise
to increase pilot flame. Pilot ad- justment is shipped at full flow rate. Turn the inner adjustment
screw clockwise
if the inlet pressure is too high.
3.Replace the cover screw after the adjustment to prevent gas leakage.
THERMOCOUPLE | PILOT SHIELD |
| |
SPARK� |
|
ELECTRODE |
|
PILOT LOCATION END VIEW
STANDING PILOT SHOWN
3/8" TO 1/2"�
PILOT FLAME
GROUND�
ELECTRODE
BURNER
PILOT
HOT SURFACE� | FLAME� |
IGNITOR | ROD |
Figure 12
Page 14 |
