Desa CGN6L, CGN10L installation manual Observed Possible Remedy Problem Cause

TROUBLE- SHOOTING

OBSERVED	POSSIBLE	REMEDY
PROBLEM	CAUSE

Continued

Burner does not light after ODS/pilot is lit

1.Burner orifice is clogged

2.Burner orifice diameter is too small

3.Inlet gas pressure is too low

1.Clean burner orifice (see Cleaning and Mainte- nance, page 20) or replace burner orifice

2.Replace burner orifice

3.Contact local natural gas company

Delayed ignition of	1.	Manifold pressure is	1.	Contact local natural gas
burner		too low		company
	2.	Burner orifice is	2.	Clean burner orifice (see
		clogged		Cleaning and Mainte-
				nance, page 20) or
				replace burner orifice
Burner backfiring	1.	Burner orifice is	1.	Clean burner orifice (see
during combustion		clogged or damaged		Cleaning and Mainte-
				nance, page 20) or
				replace burner orifice
	2.	Burner damaged	2.	Replace burner
	3.	Gas regulator defective	3.	Replace gas regulator

Yellow flame during burner combustion

1.Not enough air

2.Inlet gas pressure is too low

3.Gas regulator defective

1.Check burner for dirt and debris. If found, clean burner (see Cleaning and Mainte- nance, page 20)

2.Contact local natural gas company

3.Replace gas regulator

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Slight smoke or odor	1.	Residues from manu-	1.	Problem will stop after a
during initial operation		facturing processes		few hours of operation
Heater produces a	1.	Turning control knob	1.	Turn control knob to
whistling noise when		to HIGH position		LOW position and let
burner is lit		when burner is cold		warm up for a minute
	2.	Air in gas line	2.	Operate burner until air
				is removed from line.
				Have gas checked by
				local natural gas company
	3.	Air passageways on	3.	Observe minimum
		heater blocked		installation clearances
				(see Figure 4, page 10)
	4.	Dirty or partially	4.	Clean burner (see
		clogged burner orifice		Cleaning and Mainte-
				nance, page 20) or
				replace burner orifice.

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