Owner`s manual

29898-8-1114 Page 21
Figures 13, 15 and 17 show a correct pilot ame pattern. The correct
ame will be blue and will extend beyond the thermocouple. The
ame will surround the thermocouple just below the tip. A slight
yellow ame may occur where the pilot ame and main burner ame
meet. Figures 14, 16 and 18 show an incorrect pilot ame pattern.
The incorrect pilot ame 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
PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
Figure 13
IncorrectPilotFlamePattern
THERMOPILE
PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
Figure14
If pilot ame pattern is incorrect, as shown in Figure 14
• See Troubleshooting, page 24.
HYDRAULIC THERMOSTAT PILOT
CorrectPilotFlamePattern
PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
Figure15
IncorrectPilotFlamePattern
PILOT
THERMOCOUPLE
(NATURAL)
THERMOCOUPLE
(LPG)
Figure 16
If pilot ame pattern is incorrect, as shown in Figure 16
• See Troubleshooting, page 24.
PILOT FLAME CHARACTERISTICS