Pilot Flame Characteristics - Empire Comfort Systems MILLIVOLT VFPA32BP30LN-1 Installation Instructions And Owner's Manual

Figures 13 and 15 show a correct pilot flame pattern. The correct
flame will be blue and will extend beyond the thermocouple. The
flame will surround the thermocouple just below the tip. A slight
yellow flame may occur where the pilot flame and main burner flame
meet. Figures 14 and 18 show an incorrect pilot flame pattern.
The incorrect pilot flame is not touching the thermocouple. This will
cause the thermocouple to cool. When the thermocouple cools, the
heater will shut down.
MILLIVOLT PILOT
Correct Pilot Flame Pattern
THERMOPILE
THERMOCOUPLE
(LPG)
Incorrect Pilot Flame Pattern
THERMOPILE
THERMOCOUPLE
(LPG)
If pilot flame pattern is incorrect, as shown in Figure 14.
• See Troubleshooting, page 25.
Page 20

PILOT FLAME CHARACTERISTICS

PILOT
THERMOCOUPLE
(NATURAL)
Figure 13
PILOT
THERMOCOUPLE
(NATURAL)
Figure 14
INTERMITTENT PILOT
Correct Pilot Flame Pattern
SENSOR
Incorrect Pilot Flame Pattern
SENSOR
If pilot flame pattern is incorrect, as shown in Figure 16:
• See Troubleshooting, page 25-27.
IGNITOR
PILOT
Figure 15
IGNITOR
PILOT
Figure 16
39025-2-0620