Desa Tech B - Manual (Page 20)

20
101808
INSPECTING
BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot flame pattern. Figure 19 shows 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.
Thermocouple
Pilot Burner
Figure 18 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 19 - Incorrect Pilot Flame Pattern