Desa Tech CGN20TL Trouble- Shooting, Continued, Observed, Possible, Problem, Cause, Remedy

24

TROUBLE- SHOOTING

Continued

OBSERVED	POSSIBLE
PROBLEM	CAUSE		REMEDY
Burner does not light	1.	Burner orifice is	1.	Clean burner (see Clean-
after ODS/pilot is lit		clogged		ing and Maintenance,
				page 22) or replace burner
				orifice
	2.	Burner orifice diameter	2.	Replace burner orifice
		is too small
	3.	Inlet gas pressure is	3.	Contact local natural gas
		too low		company
Delayed ignition of	1.	Manifold pressure is	1.	Contact local natural gas
burner		too low		company
	2.	Burner orifice is	2.	Clean burner (see Clean-
		clogged		ing and Maintenance,
				page 22) or replace burner
				orifice
Burner backfiring	1.	Burner orifice is	1.	Clean burner (see Clean-
during combustion		clogged or damaged		ing and Maintenance,
				page 22) or replace burner
				orifice
	2.	Burner damaged	2.	Replace burner
	3.	Gas regulator defective	3.	Replace gas regulator
Yellow flame during	1. Not enough air		1.	Check burner for dirt and
burner combustion				debris. If found, clean
				burner (see Cleaning and
				Maintenance, page 22)
	2.	Gas regulator defective	2.	Replace gas regulator
Slight smoke or odor	1. Residues from manu-		1.	Problem will stop after a
during initial opera-		facturing processes		few hours of operation
tion
Heater produces a	1. Turning control knob		1.	Turn control knob to LO
whistling noise when		to HI position when		position and let warm up
burner is lit		burner is cold		for a minute
	2.	Air in gas line	2.	Operate burner until air is
				removed from line. Have
				gas line checked by local
				natural gas company
	3.	Air passageways on	3.	Observe minimum installa-
		heater blocked		tion clearances (see Figure
				4, page 10)
	4.	Dirty or partially	4.	Clean burner (see Clean-
		clogged burner orifice		ing and Maintenance,
				page 22) or replace burner
				orifice

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