Empire Comfort Systems DV-35-2SG Furnace User Manual


 
12434-3-0903
Page 11
PILOT FLAME CHARACTERISTICS
The correct flame will be almost horizontal, blue and will extend
past the thermopile 1/4" (6mm). The flame will surround the
thermopile just below the tip.
On propane (LP-gas) slight yellow might occur where the pilot
flame and burner flame meet.
Natural gas pilots require adjusting when the inlet pressure is
above 5" w.c. (1.25kPa) Turn adjustment screw clockwise to
reduce flame.
Propane (LP-gas) will not require adjusting.
Figure 7
MAIN BURNER FLAME CHARACTERISTICS
There will be a short blue inner flame with a much larger lighter
blue secondary flame. The burner flame may have a yellow tip
when hot. See the burner drawing showing the approximate
heights of each part of the flame. Dust in the combustion air will
produce an orange or red flame. Do not mistake the orange or red
flame for an improper yellow flame. After use, cleaning may be
required for the proper flame.
Figure 8
Primary Air Adjustment (Figure 9)
An air adjustment bolt is located on the chamber support bottom.
The four inch (102mm) clearance between the furnace and the
floor allows access to the air adjustment bolt. The air adjustment
bolt is above the rectangular opening on the inner casing bottom.
BURNER FLAME
PRIMARY FLAME 1/4" (6mm) TO 1/2" (13mm)
SECONDARY FLAME 4" (102mm) TO 6" (152mm)
On Propane gas, if a whistling noise (resonation) occurs, screw
air adjustment bolt into the chamber support in order to reduce the
amount of primary air. If the whistling noise (resonation) is not
eliminated when the air adjustment bolt is screwed into the
chamber support this may indicate the air adjustment bolt is
misaligned. Grasp air adjustment bolt and pivot (push) air
adjustment bolt away from yourself. Observe the main burner
flame as you push air adjustment bolt and when the main burner
flame begins to develop a yellow flame, you should stop pushing
on the air adjustment bolt. Screw air adjustment bolt out of the
chamber support until the yellow flame on the main burner is
eliminated. The air adjustment bolt should now be properly
aligned. The reduction in primary air will soften the main burner
flame and will eliminate the whistling noise (resonation).
On Propane or Natural gas, if a yellow flame occurs, screw air
adjustment bolt out of the chamber support but do not completely
remove air adjustment bolt from chamber support. The
repositioning of the air adjustment bolt will increase the amount
of primary air. The increase in primary air will sharpen the main
burner flame and will eliminate the yellow flame.
Figure 9
4" (102mm)
FLOOR
AIR BOLT