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G-P Burners
1) GAS-ELECTRIC IGNITION
The gas-electric pilots used on G-P burners are either fl ame rod or scanner design.
2) POOR FLAME SIGNAL
Try adjusting needle valve or pilot pressure regulator. Should this not be successful, check the primary pilot
air. If neither of these methods improve the reading, inspect the fl ame rod position.
3) IGNITION ELECTRODE
The igniion electrode is positioned as shown, with the horizontal part of the electrode fl ush with the diffuser
plate. Leaving a gap of 1/16" to 1/8" wide. The pointing direction of the electrode is as shown, but is not critical.
4) FLAME SENSOR
a. The fl ame sensor shown is a rectifi cation, or a fl ame rod. A UV scanner can be used instead. In that case
the scanner tube is positioned in the same holder as the fl ame rod.
Ignition Electrode For Straight G-P Gas Burners Using A Flat Diffuser Plate
DIFFUSER POSITION ADJUSTMENT
Moving the blast tube diffuser assembly fore or aft on
gas or oil fi ring will move the fl ame front (point of re-
tention) in order to attain the best (quietest/smoothest)
combustion for specifi c job conditions. If the initial mid-
way point factory setting does not provide satisfactory
results, move fore or aft in small increments to achieve
the best combustion results. If unit is oil or combination
gas/oil, the attached, fl exible copper oil nozzle line will
move fore or aft with the assembly. When fi ring on oil,
moving the assembly forward will tend to broaden the
fl ame pattern and moving it back will narrow the fl ame
pattern. Similar results are obtained on gas, but ob-
servation of sound and combustion tests are the best
determinants of results on either gas or oil.
Gas, Oil or Gas/Oil Burner Diffuser Adjustment
Gas/Air Premix Adjustment Knob
Blast Tube Diffuser Position Adjustment
Gas Inlet
Summary of Contents for GAS-FIRED HEATERS
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Page 24: ... 24 TYPICAL SEQUENCE FOR MODULATING THERMOSTAT WITH 135 OHM CONTROLS ...
Page 25: ... 25 TYPICAL SEQUENCE FOR MODULATING THERMOSTAT WITH 4 20 mA CONTROLS ...
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