Desa Tech CGD3930PT, CGD3924PT installation manual Trouble, Shooting, clogged, Heater produces a

TROUBLE-	OBSERVED			POSSIBLE
	PROBLEM			CAUSE
SHOOTING
Continued	Burner	does light		1.	Burner		orifice		clogged
	after ODS/pilot		is lit
				2.	Inlet	gas		pressure		is
					too	low
				3.	Burner		orifice		diameter
					is too		small
	Delayed	ignition	of	1.	Manifold			pressure		is
	bumer				too	low
				2.	Burner		orifice		clogged

Bumer backfiring		1.	Burner orifice is
during combustion			clogged		or damaged
		2.	Damaged		burner
		3.	Gas	regulator		defective
Slight smoke or		1.	Not	enough		air
odor during	initial
operation
		2.	Gas	regulator		defective
		3.	Residues		from manu-
			facturing		processes
			and	logs	curing
Moisture!condensa-		1.	Not	enough		combus-
tion noticed	on		tion/ventilation			air
windows
Heater produces a		I. Turning controlknob
whistling noise			toHI positionwhen
when burner	is lit		burneriscold

2. Air in gas line

3. Air passageways on

heater blocked

4. Dirty or partially clogged burner orifice

REMEDY

1.Clean burner (see Cleaning and Mainte- nance, page 25) or replace burner orifice

2.Contact local propane gas company

3.Replace burner orifice

1.Contact local natural gas company

2.Clean burner (see Cleaning and Mainte- nance, page 25) or replace burner orifice

1.Clean burner (see Cleaning and Mainte-

nance, page 25) or replace burner orifice

2.Replace damaged burner

3.Replace gas regulator

1.Check burner for dirt and debris. If found, clean burner (see Cleaning and Mainte- nance, page 25)

2.Replace gas regulator

3.Problem will stop after a few hours of operation

1.Refer to Air for Com- bustion and Ventilation

requirements (page 5)

1.Turn control knob to LO

position and let warm up for a minute

2.Operate burner until air is removed from line.

Have gas line checked by local natural gas company

3.Observe minimum installation clearances (see pages 9-12)

4.Clean burner (see Cleaningand Maintenance,

page 25) or replace burner orifice