Desa GWN10 - Manual (Page 15)

107902-01D
15
15
For more information, visit www.desatech.com For more information, visit www.desatech.com
GRH/OV 007 GOOD PILOT/LP GRH/OV 008 BAD PILOT/LP
1/2 GLASS HEIGHT
1/2 GLASS HEIGHT
INSPECTING BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 24 shows a correct pilot flame pattern. Figure 25 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.
If pilot flame pattern is incorrect, as shown in Figure 25
• turn heater off (see To Turn Off Gas to Appliance, pages 12, 13
or 14 depending on your model)
• see Troubleshooting, pages 17 through 19
Note: The pilot flame on natural gas units will have a slight curve,
but flame should be blue and have no yellow or orange color.
Figure 25 - Incorrect Pilot Flame
Pattern Figure 24 - Correct Pilot Flame
Pattern
BURNER FLAME PATTERN
BLUE FLAME MODELS
Figure 26 shows a correct burner flame pattern. Figure 27 shows an
incorrect burner flame pattern. The incorrect burner flame pattern
shows yellow tipping of the flame. It also shows the flame higher
than 1/2 the glass panel height.
WARNING: If yellow tipping occurs, your heater
could produce increased levels of carbon monoxide.
If burner flame pattern shows yellow tipping, proceed
with the following instructions.
NOTICE: Do not mistake orange flames with yellow
tipping. Dust or other fine particles enter the heater
and burn causing brief patches of orange flame.
If burner flame pattern is incorrect, as shown in Figure 27
• turn heater off (see To Turn Off Gas to Appliance, pages 12 or
14 depending on your model)
• see Troubleshooting, pages 17 through 19
Thermocouple
Pilot Burner
Thermocouple
Pilot
Burner
Figure 26 - Correct Burner Flame Pattern
Yellow
Tipping
Figure 27 - Incorrect Burner Flame Pattern
(Models GWN6 and GWP6 will be lower
due to lower input rating)
INSPECTING BURNER
Pilot Flame Pattern
Burner Flame Pattern Blue Flame Models
Burner Flame Pattern Infrared Models
BURNER FLAME PATTERN
INFRARED MODELS
Figure 28 shows a correct burner flame pattern. Figure 29 shows an
incorrect burner flame pattern.
If burner flame pattern is incorrect, as shown in Figure 29
• turn heater off (see To Turn Off Gas to Appliance, page 13 or 14)
• see Troubleshooting, pages 17 through 19
Figure 29 - Incorrect Burner
Flame Pattern Figure 28 - Correct Burner
Flame Pattern