Desa UNVENTED (VENT-FREE) NATURAL GAS FIREPLACE Accessories, GMC12U - Unfinished

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	ACCESSORIES	Purchase these fireplace accessories from your local dealer. If they can not supply
	ACCESSORIES	these accessories, call DESA International’s Sales Department at 1-800-432-2382

		for information. You can also write to the address listed on the back page of this
		manual.

CABINET MANTEL

GMC11F - Walnut Finished

GMC12U - Unfinished

Shown with optional base accessory.

Dimensions (HxWxD): 44-1/8" x 56-15/16" x 22-7/16"

HEARTH BASE

GC3333F- Walnut Finished

GC3334U - Unfinished

The hearth base creates a handsome riser for the fireplace

Dimensions (HxWxD): 6" x 56-7/8" x 28"

MANUAL SHUTOFF

VALVE - GA5010

For all models. Manual shutoff valve with 1/8" NPT tap. Fits 1/2" NPT pipe.

NAILING FLANGE - G3004

For securing fireplace to wall studs for built-in installation. Two included.

101742

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Contents Save this manual for future reference OWNER’S OPERATION AND INSTALLATION MANUALUNVENTED VENT-FREENATURAL GAS FIREPLACE Safety Information continues on next page CONTENTS SAFETY INFORMATIONWARNINGS DANGERINFORMATION SAFETYContinued Figure 1 - Log Base Assembly PRODUCT IDENTIFICATIONFigure 2 - Fireplace Piezo Ignition System LOCAL CODES UNPACKING PRODUCT FEATURESSafety Device OperationPROVIDING ADEQUATE VENTILATION AIR FOR COMBUSTION AND VENTILATIONContinued AIR FORVENTILATION COMBUSTIONVentilation Air from Inside Building AIR FOR COMBUSTION AND VENTILATIONContinued VENTILATION AIRNOTICE INSTALLINGContinued Continued INSTALLINGASSEMBLING AND ATTACHING BRASS TRIM CONVENTIONAL FIREPLACE INSTALLATION INSTALLINGINSTALLATION CLEARANCES ContinuedContinued INSTALLINGheads and putty over Continued INSTALLINGBUILT-INFIREPLACE INSTALLATION Continued39 3/8 27 7/8 35 1/2 55 5/8 INSTALLINGFigure 13 - Attaching Nailing Flange Accessory ContinuedContinued INSTALLINGMantel Clearances for Built-InInstallation ContinuedNOTICE INSTALLINGINSTALLING GAS PIPING TO FIREPLACE LOCATION Installation Items NeededContinued INSTALLINGCONNECTING FIREPLACE TO GAS SUPPLY Installation Items NeededContinued G 001WARNINGINSTALLING NOTICEContinued INSTALLINGPressure Testing Fireplace Gas Connections ContinuedFigure 22 - Installing Front Log INSTALLINGINSTALLING LOGS Figure 21 - Installing Rear LogContinued INSTALLINGFigure 23 - Installing Crossover Log ContinuedContinued FOR YOUR SAFETY READ BEFORE LIGHTINGOPERATING FIREPLACE INSTALLINGLIGHTING INSTRUCTIONS OPERATINGFIREPLACE NOTICEOPERATING FIREPLACE MANUAL LIGHTING PROCEDURETO TURN OFF GAS TO APPLIANCE VARIABLE OUTPUT CONTROL OPERATIONPILOT FLAME PATTERN INSPECTINGBURNERS NOTICEODS/PILOT AND BURNERS CLEANING AND MAINTENANCE TROUBLE SHOOTINGLOGS Continued TROUBLE- SHOOTINGCleaning and Mainte ContinuedCleaning and Mainte TROUBLE SHOOTINGCleaning and Mainte Cleaning and Mainteleaks see Checking Gas TROUBLESHOOTING ContinuedWhen gas quality is bad TECHNICAL SERVICE SERVICE HINTSREPLACEMENT PARTS SPECIFICATIONS When gas pressure is too lowHEARTH BASE GC3333F- Walnut Finished ACCESSORIESCABINET MANTEL GMC11F - Walnut Finished GMC12U - UnfinishedBREAKDOWN Log Base AssemblyILLUSTRATED PARTSDESCRIPTION PARTS LISTLog Base Assembly PART NUMBERBREAKDOWN FireplaceILLUSTRATED PARTSDESCRIPTION PARTS LISTFireplace PART NUMBERLIMITED WARRANTY VENT-FREENATURAL GAS FIREPLACE WARRANTY INFORMATIONKEEP THIS WARRANTY