Desa GWN20TA Slight smoke or odor during, Observe minimum installa, Blocked, Burner orifice

Page 21

TROUBLESHOOTING

Continued

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY

Yellow flame during burner	1.	Not enough air	1.	Check burner for dirt and
combustion				debris. If found, clean
				burner (see Cleaning and
				Maintenance, page 18)
	2.	Gas regulator defective	2.	Replace gas regulator
	3.	Clogged or dirty burner	3.	Clean burner (see Cleaning
				and Maintenance, page 18)

Slight smoke or odor during	1.	Residues from manufactur-	1.	Problem will stop after a few
initial operation		ing processes		hours of operation

Heater produces a whistling	1.	Turning control knob to 5	1.	Turn control knob to 1 posi-
noise when burner is lit		position when burner is		tion and let warm up for a
		cold		minute
	2.	Air in gas line	2.	Operate burner until air is
				removed from line. Have
				gas line checked by local
				natural or propane/LP gas
				company
	3.	Air passageways on heater	3.	Observe minimum installa-
		blocked		tion clearances (see Figure
				4, page 8)
	4.	Dirty or partially clogged	4.	Clean burner (see Cleaning
		burner orifice		and Maintenance, page 18)
				or replace burner orifice

White powder residue forming	1.	When heated, vapors from	1.	Turn heater off when us-
within burner box or on adja-		furniture polish, wax, carpet		ing furniture polish, wax,
cent walls or furniture		cleaners, etc. may turn into		carpet cleaners or similar
		white powder residue		products

Heater produces a clicking/	1.	Metal expanding while heat-	1.	This is normal with most
ticking noise just after burner		ing or contracting while		heaters. If noise is exces-
is lit or shut off		cooling		sive, contact qualified ser-
				vice person

119344-01B

www.desatech.com

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Contents Models GWN20TA, GWP20TA, GWN30TA, GWP30TA, WMN20a, WMP20a What to do if YOU Smell GASSafety Information Table of ContentsSafety Information Product Features Safety InformationLocal Codes UnpackingProviding Adequate Ventilation Air For Combustion VentilationUnusually Tight Construction Confined and Unconfined SpaceAIR for Combustion Ventilation Determining FRESH-AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Ventilation AIR InstallationCheck GAS Type Ventilation Air From Inside BuildingInstallation Items InstallationLocating Heater This heater is designed to be mounted on a wallInstalling Heater to Wall 20,000 Btu/Hr Models 30,000 Btu/Hr ModelsAttaching To Wall Stud Method Attaching To Wall Anchor MethodMounting heater to floor With optional floor kit Installing Bottom Mounting ScrewsHeater Wall Mounting Base Feet to HeaterTypical Inlet Pipe Diameters Connecting to GAS SupplyTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Checking GAS ConnectionsCorrect all leaks at once Pressure Testing Heater Gas ConnectionsOperating Heater For Your Safety Read Before LightingLighting Instructions Do not try to light any applianceOperating Heater Manual Lighting ProcedureTo Turn OFF GAS To Appliance Thermostat Control OperationInspecting Heater Pilot Flame PatternBurner Flame Pattern ODS/PILOT and Burner Cleaning MaintenanceBurner Pilot Air Inlet CabinetObserved Problem Possible Cause Remedy TroubleshootingTroubleshooting Slight smoke or odor during Observe minimum installaBlocked Burner orificeStatement above Gas leak. See WarningService Hints SpecificationsReplacement Parts Technical ServiceModels WMN20A, WMP20A, GWN20TA, GWP20TA, GWN30TA and GWP30TA Illustrated Parts BreakdownNJF 8C Parts ListEquipment Shutoff Valve GA5010 AccessoriesBase Kit GA4550 Electronic ignitor Kit GA435 Not ShownParts Centrals Keep this Warranty Warranty InformationModel Serial No Date of Purchase Industrial Drive P.O. Box 119344-01 Rev. B