Desa SVYD18N installation manual Refer to Air for Com

TROUBLE- SHOOTING

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OBSERVED	POSSIBLE
PROBLEM	CAUSE		REMEDY
Burner does not light	1.	Inlet gas pressure is	1.	Contact local natural
after ODS/pilot is lit		too low		gas company
	2.	Burner orifice clogged	2.	Clean burner (see
				Cleaning and Mainte-
				nance, page 21) or
	3.	Burner orifice diameter		replace burner orifice
			3.	Replace burner orifice
		is too small
Delayed ignition	1.	Manifold pressure is	1.	Contact local natural
burner		too low		gas company
	2.	Burner orifice clogged	2.	Clean burner (see
				Cleaning and Mainte-
				nance, page 21) or
				replace burner orifice
Burner backfiring	1.	Burner orifice is	1.	Clean burner (see
during combustion		clogged or damaged		Cleaning and Mainte-
				nance, page 21) or
	2.	Damaged burner		replace burner orifice
			2.	Replace damaged
	3.	Gas regulator defective		burner
			3.	Replace gas regulator
Slight smoke or odor	1. Not enough air		1.	Check burner for dirt
during initial opera-				and debris. If found,
tion				clean burner (see
				Cleaning and Mainte-
	2.	Gas regulator defective		nance, page 21)
			2.	Replace gas regulator
	3.	Residues from manu-	3.	Problem will stop after
		facturing processes		a few hours of opera-
		and logs curing		tion
Heater produces a	1. Turning control knob		1.	Turn control knob to
whistling noise when		to HI position when		LO position and let
burner is lit		burner is cold		warm up 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
	3.	Air passageways on		company
			3.	Observe minimum
		heater blocked		installation clearances
	4.	Dirty or partially		(see pages 8-9)
			4.	Clean burners (see
		clogged burner orifice		Cleaning and Mainte-
				nance, page 21) or
				replace burner orifice
Moisture/condensation	1.	Not enough combus-	1.	Refer to Air for Com-
noticed on windows		tion/ventilation air		bustion and Ventilation
				requirements (pages 5-7)

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