30411-17-0120
Page 20
PILOT FLAME CHARACTERISTICS
Figures 13, 14 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 16, 17 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.
Correct Pilot Flame Pattern
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
THERMOPILE
PILOT
Millivolt Pilot, Figure 13
PILOT
THERMOCOUPLE
(NATURAL)
THERMOCOUPLE
(LPG)
Hydraulic Thermostat Pilot, Figure 14
PILOT
SENSOR
IGNITOR
Intermittent Pilot, Figure 15
Incorrect Pilot Flame Pattern
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
THERMOPILE
PILOT
Millivolt Pilot, Figure 16
PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
Hydraulic Thermostat Pilot, Figure 17
PILOT
SENSOR
IGNITOR
Intermittent Pilot, Figure 18
If pilot flame pattern is incorrect as shown in Figures 16 and 17
• See Troubleshooting, Page 22
If pilot flame pattern is incorrect, as shown in Figure 18.
• See Troubleshooting, pages 25 - 27.
THERMOCOUPLE
(PROPANE)
THERMOCOUPLE
(PROPANE)
THERMOCOUPLE
(PROPANE)
THERMOCOUPLE
(PROPANE)
