(Natural Gas)

22

INSPECTING BURNERS

Pilot Flame Pattern Burner Flame Patterns

INSPECTING BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure 37 shows a correct pilot flame pattern. Figure 38 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 38

turn heater off (see To Turn Off Gas to Appliance, page 18 [Ther- mostat-Controlled Models] or page 20 [Remote-Ready Models])

see Troubleshooting, pages 24 through 26

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

 

Thermocouple

(Natural Gas)

(Propane/LP Gas)

Figure 37 - Correct Pilot Flame Pattern (Your pilot may vary from

pilots shown)

Thermocouple

Pilot Burner

Pilot Burner

 

Thermocouple (Propane/LP Gas)

Figure 38 - Incorrect Pilot Flame Pattern (Your pilot may vary from pilots shown)

BURNER FLAME PATTERNS

Figure39 showscorrectfrontand/ormiddleburnerflamepatterns.Figure 40 shows incorrect front and/or middle burner flame patterns. The incorrect burner flame patterns show yellow tipping at top of blue flame.

WARNING: If yellow tipping occurs, your heater could produce increased levels of carbon monoxide. If burner flame patterns show yellow tipping, follow in- structions 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 front and/or middle burner flame patterns are incorrect, as shown in Figure 40

turn heater off (see To Turn Off Gas to Appliance, page 18 [Ther- mostat-Controlled Models] or page 20 [Remote-Ready Models])

see Troubleshooting, pages 24 through 26

Correct Front and Middle Burner Flame Patterns for VRL24NT/PT,

VRL24NR/PR, VRL30NT/PT and VRL30NR/PR Models

Correct Front and Middle Burner Flame Patterns for

CSG3924NT/PT and CSG3924NR/PR Models

Correct Middle Burner Flame Pattern for

CTB3924NT/PT and CTB3924NR/PR Models

Figure 39 - Correct Burner Flame Patterns

Yellow Tipping At

Top of Blue Flame

Incorrect Front and Middle Burner Flame Patterns for VRL24NT/PT,

VRL24NR/PR, VRL30NT/PT and VRL30NR/PR Models

Yellow Tipping At

Top of Blue Flame

Incorrect Front and Middle Burner Flame Patterns for

CSG3924NT/PT and CSG3924NR/PR Models

Yellow Tipping At

Top of Blue Flame

Incorrect Middle Burner Flame Pattern for

CTB3924NT/PT and CTB3924NR/PR Models

Figure 40 - Incorrect Burner Flame Patterns (VRL Models only)

For..com

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Desa CTB3924PT, VRL24NT, CSG3924NT, VRL24PT, VRL30NT, VRL30PT Inspecting Burners, Pilot Flame Pattern, Burner Flame Patterns

VRL30NT, VRL24PT, CSG3924NT, VRL30PT, VRL24NT specifications

Desa VRL24NR, VRL24PR, VRL30NR, VRL30PR, CSG3924NR, CSG3924PR, CTB3924NR, CTB3924PR, VRL24NT, VRL24PT, VRL30NT, VRL30PT, CSG3924NT, CSG3924PT, CTB3924NT, and CTB3924PT are a series of innovative heating solutions that cater to various residential and commercial needs. These models are designed to provide efficient, reliable, and aesthetically pleasing heating options.

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