Inspecting Burner - Desa VP10A. VN10TA Owner's Operation And Installation Manual

INSPECTING BURNER

Check pilot flame pattern and burner flame pat-
tern often.
PILOT FLAME PATTERN
Figure 24 shows a correct pilot flame pattern. Figure
25 shows an incorrect pilot flame pattern. The incor-
rect 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 14, 16 or 17 depending on your model)
• see Troubleshooting, page 20
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.
Thermocouple
Thermocouple
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 pro-
duce 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.
18
Pilot Burner
Pilot Burner
www.desatech.com
If burner flame pattern is incorrect, as shown in
Figure 27
• turn heater off (see To Turn Off Gas to Appliance,
page 14 or 17 depending on your model)
• see Troubleshooting, page 20
CORRECT FLAME PATTERN
(Models VN600A and VP600A will be
AT HIGH POSITION
lower due to lower input rating)
CORRECT FLAME PATTERN
Figure 26 - Correct Burner Flame Pattern
AT HIGH POSITION
INCORRECT FLAME PATTERN
AT HIGH POSITION
INCORRECT FLAME PATTERN
AT HIGH POSITION
Figure 27 - Incorrect Burner Flame
BURNER FLAME PATTERN
INFRARED MODELS
Figure 28 shows a correct burner flame pattern. Fig-
ure 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 Appli-
ance, page 16)
• see Troubleshooting, page 20
Figure 28 - Correct Burner Flame Pattern
(Dual Burner Shown)
Figure 29 - Incorrect Burner Flame
Pattern (Dual Burner Shown)
1/2 GLASS HEIGHT
1/2 GLASS HEIGHT
Yellow
Tipping
1/2 GLASS HEIGHT
1/2 GLASS HEIGHT
Pattern
110720-01G