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Page 34
Figures 29 and 30 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 31 and 32 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.
Correct Pilot Flame Pattern for MILLIVOLT
Figure 29
Correct Pilot Flame Pattern for INTERMITTENT PILOT
Figure 30
Incorrect Pilot Flame Pattern for MILLIVOLT
Figure 31
Incorrect Flame Pattern for INTERMITTENT PILOT
Figure 32
If pilot flame pattern is incorrect, as shown in Figures 31 and 32
• See Troubleshooting, page 37.
THERMOPILE
(VFRL ONLY)
PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
THERMOPILE
(VFRL ONLY)
PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
pILOT FLAME CHARACTERISTICS
PILOT
THERMOCOUPLE
(NATURAL)
THERMOCOUPLE
(LPG)
PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
