Pilot Flame Characteristics - Empire Comfort Systems FLINT HILL VFDR18LB10N-1 Installation Instructions And Owner's Manual

Figures 21 and 22 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 23 and 24 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.
THERMOPILE
(VFDR ONLY)
THERMOCOUPLE
(LPG)
correct Pilot Flame Pattern for VFDr
correct Pilot Flame Pattern for VFDT & VFDM
Page 22

PILOT FLAMe cHArAcTerISTIcS

PILOT
THERMOCOUPLE
(NATURAL)
Figure 21
Figure 22
THERMOPILE
(VFDR ONLY)
THERMOCOUPLE
(LPG)
Incorrect Pilot Flame Pattern for VFDr
Incorrect Flame Pattern for VFDT & VFDM
If pilot flame pattern is incorrect, as shown in Figures 23 and 24
• See Troubleshooting, page 24.
PILOT
THERMOCOUPLE
(NATURAL)
Figure 23
Figure 24
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