24
With the flame spreader pulled all the way back, the flame spreader adjustment rod should measure approximately 3 1/4
inches from the back plate. With the flame spreader adjustment rod pushed all the way in it should measure
approximately 1 inch from the burner back plate.
Adjust the flame so that it will fill the firebox without impinging on the back wall.
Once the flame is adjusted properly, retighten the set screw.
Air Shutter Adjustment
To adjust the disc air shutter, loosen the locking nut and then spin the disc either closer to or further from the fan housing.
Increasing the air shutter opening will usually lower the CO
2
and CO readings. To determine the correct air shutter
adjustment a combustion analyzer capable of measuring CO
2
(or O
2
) and CO must be used.
FIGURE 18: AIR SHUTTER LOCK NUT LOCATION
For natural gas applications, best performance will be achieved with a CO
2
setting of 8% to 10% (3% to 6.5% O
2
) and
CO should be minimized with a goal of 100 ppm or less.
In no case should CO be above 400 ppm.
For propane gas applications, best performance will be achieved with a CO
2
setting of 9.5% to 11.8% (3% to 6.5% O
2
)
and CO should be minimized with a goal of 100 ppm or less.
In no case should CO be above 400 ppm.
Stack temperatures for furnaces and boilers are recommended to be between 350 and 400 degrees Fahrenheit. Tighten
the lock nut to secure the air shutter. After the air is adjusted and the burner is running properly, be sure to record all set
up information and leave it with the burner.
FINAL INSTALLATION INSTRUCTIONS
Once adjustments to the burner are complete and burner is set up per the manual, record combustion numbers measured
during setup, burner model number, model specification number, inlet gas pressure, date of installation, and contractor
contact information in Installation Log. Leave the manual with appliance.
SECTION III: GAS CONVERSION
NATURAL GAS AND LP CONVERSION INSTRUCTIONS
FOR P250 AND P265 BURNERS
In order to allow P250 and P265 burners to be converted from natural gas to LP gas operation, or from LP to natural gas
operation, Wayne Combustion Systems has created gas conversion kits that contain all the parts necessary for any
burner model regardless of the type of ignition system utilized; Direct Ignition, Electronic Pilot Ignition, Standing Pilot
Ignition. The part numbers for these kits are as follows:
62955-001
Kit for converting natural gas burners to LP gas.
62956-001
Kit for converting LP gas burners to natural gas.
Summary of Contents for P250 series
Page 35: ...35 FIGURE 23 WIRING DIAGRAMS FOR GAS BURNER WITH DIRECT IGNITION FENWAL...
Page 36: ...36 FIGURE 24 WIRING DIAGRAMS FOR GAS BURNER WITH ELECTRONIC PILOT HONEYWELL...
Page 37: ...37 FIGURE 25 WIRING DIAGRAMS FOR GAS BURNER WITH ELECTRONIC PILOT NO T STAT...
Page 38: ...38 FIGURE 26 WIRING DIAGRAMS FOR GAS BURNER WITH ELECTRONIC PILOT FENWAL...
Page 46: ...46 NOTES...
