Profire V Burner Chapter 2
750-177 2-27
TEST EQUIPMENT
The following test equipment should be used to set up and adjust the burner correctly
:
• Combustion analyzer with O
2
indication.
• U-Tube manometer, or pressure gauge, to measure gas pressures
(Main and Pilot), vacuum and pressure gauges for oil.
• Inclined manometer to measure draft pressures.
• Smoke spot tester for oil burners and CO analyzer for gas fired units.
• Voltmeter/Ammeter.
• Stack Thermometer and Thermocouples.
GAS ADJUSTMENTS
Low-fire combustion analysis typically is 6% to 9% O
2
and less than .04% CO (400 ppm). High-fire reading
typically is 3% to 5% O
2
and less than .04% CO. The V/Series burners are capable of operating at low excess
air and less than 50 ppm CO levels at all firing rates.
FUEL OIL ADJUSTMENTS
Adjust for a “clean fire.” Typically for No. 2 oil, O
2
is 5% to 6% at low-fire and 3.5% to 4.5% at high-fire.
GAS PILOT FLAME ADJUSTMENT
The gas pilot flame is regulated by adjusting the pressure setting of the pilot regulato
r. Normal setting is 4” to
6” W.C. when the pilot is burning. The flame must be sufficient to be proven by the flame detector and ignite
the main flame.
To adjust pilot gas pressure, unscrew regulator cap and
turn the adjusting screw in or out.
Although it is possible to visibly adjust the size
of the pilot flame, obtain a proper DC volt or microamp reading
of the flame signal.
The flame safeguard amplifier has a meter jack for this purpose.
At initial startup and during planned
maintenance, test the pilot flame signal, pilot turndown, and safety switch lockout. Refer to the flame
safeguard instruction manual.
Check the pilot electrode setting. The pilot is accessible by loose
ning the four screws on the side of the firing
head and disconnecting the gas line.
!
DANGER
CAUTION
!
DANGER
WARNING
AN ULTRA-VIOLET FLAME SENSOR ELECRICAL
SPARK INTERFERENCE TEST MUST BE PER-
FORMED AFTER FINAL ADJUSTMENT.
DIRECT SPARK (OIL ONLY) ADJUSTMENT
Oil only burner models VL13 to 55 are equipped with a direct spark ignition
. Remove the oil drawer assembly
and check electrode settings and nozzle size.
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