INSPECTING BURNERS
Check pilot flame pattern and burner flame pat- terns 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 Appli- ance, page 17)
•see Troubleshooting, pages 20
Note: The pilot flame on natural gas units will | ||
have a slight curve, but the flame should be blue | ||
and have no yellow or orange color. | ||
Pilot Burner | Thermocouple | Pilot Burner |
| ||
WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide. If burner flame pat- terns show yellow tipping, follow instructions below.Yellow flame on rear burner is normal.
NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles are burned by heater, causing brief patches of orange flame.
If burner flame patterns are incorrect, as shown in Figure 27
•turn heater off (see To Turn Off Gas to Appli- ance, page 17)
•see Troubleshooting, page 20
(Natural Gas) | (Propane/LP Gas) | |
Figure 24 - Correct Pilot Flame Pattern | ||
(Your pilot may vary from pilots shown) | ||
Pilot Burner | Pilot Burner | |
Thermocouple | ||
| ||
Figure 26 - Correct Burner Flame Patterns
Yellow Tipping At
Top of Blue Flame
(Natural Gas) | (Propane/LP Gas) |
Figure 25 - Incorrect Pilot Flame Pattern | |
(Your pilot may vary from pilots shown) | |
BURNER FLAME PATTERNS
Figure 26 shows correct burner flame patterns. Figure 27 shows incorrect burner flame patterns. The incorrect burner flame patterns show yellow tipping at top of blue flame.
Figure 27 - Incorrect Burner Flame Patterns
TECHNICAL SERVICE
You may have further questions about installation, operation, or troubleshooting. If so, contact DESA Heating ProductsʼTechnical Service Department at
You can also visit DESA Heating Productsʼtechni- cal services web site at www.desatech.com.
18 | www.desatech.com |
