Desa 103426-01 Check Gas Type, Installation And Clearances, Vent-FreeOperation Only

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INSTALLATION

UNVENTED NATURAL GAS LOG HEATER

INSTALLATION

NOTICE: A qualified service per- son must install heater. Follow all local codes.

NOTICE: State or local codes may only allow operation of this appli- ance in a vented configuration. Check your state or local codes.

IMPORTANT: Vent-free heaters add mois-

 

ture to the air. Although this is beneficial,

 

installing heater in rooms without enough

 

ventilation air may cause mildew to form

 

from too much moisture. See Air for Com-

42"

bustion and Ventilation, pages 4 and 5.

 

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural, do not install heater. Call dealer where you bought heater for proper type

WARNING: Before installing

heater.

16"

in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a quali-

INSTALLATION AND CLEARANCES

(Vent-Free Operation Only)

fied chimney cleaner. Creosote will ignite if highly heated. In- spect chimney flue for damage. If damaged, operate heater with flue damper closed.

bustion and Ventilation, pages 4 and 5. WARNING: Seal any fresh air vents or ash clean-out doors lo- cated on floor or wall of fireplace. If not, drafting may cause pilot outage or sooting. Use a heat- resistant sealant. Do not seal chimney flue damper.

CHECK GAS TYPE WARNING: Never install the heater

in a bedroom or bathroom un- less installed as a vented ap- pliance, see page 8

in a recreational vehicle

where curtains, furniture, clothing, or other flammable objects are less than 36 inches from the front, top, or sides of the heater

in high traffic areas

in windy or drafty areas

INSTALLATION AND CLEARANCES CAUTION: This heater cre- ates warm air currents. These currents move heat to wall sur- faces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities in the air (such as tobacco smoke) exist, may discolor walls.

(Vent-Free Operation Only) WARNING: Maintain the mini- mum clearances. If you can, pro- vide greater clearances from floor, ceiling, and adjoining wall.

MINIMUM FIREPLACE CLEARANCE TO COMBUSTIBLE MATERIALS

Log Size

18", 24", 30"

 

 

Side Wall

16"

 

 

Ceiling

42"

 

 

Floor

5"

 

 

LOG SIZING REQUIREMENTS

Log

 

Minimum Firebox Size

Size

Height

Depth

Front Width

 

 

 

 

 

18"

 

17"

14"

20"

24"

 

17"

14"

26"

30"

 

17"

14"

32"

 

 

 

 

 

Carefully follow the instructions below. This will ensure safe installation into a masonry or U.L. listed manufactured fireplace.

Minimum Wall and Ceiling Clearances (see Figure 5)

A.Clearances from the side of the fire- place opening to any combustible wall should not be less than 16 inches.

B.Clearances from the top of the fireplace opening to the ceiling should not be less than 42 inches.

Figure 5 - Minimum Clearance to Wall and Ceiling

NOTICE: Manual control heaters may be used as a vented product. If so, you must always run heater with chimney flue damper open. If running heater with damper open, noncombustible material above fireplace opening is not needed. Go to Installing Damper Clamp Accessory for Vented Operation, page 8.

Minimum Non Combustible Material Clearances

If Not Using Mantel

Note: If using a mantel, go to page 7. If not using a mantel, follow the information on this page.

You must have non combustible material(s) above the fireplace opening. Non combus- tible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have non combustible material behind it. Non combustible mate- rial must extend at least 8" up (for all mod- els). If non combustible material is less than 12", you must install the fireplace hood accessory (24" and 30" models only). See chart on page 7, column 1 and Figure 5 for minimum clearances.

IMPORTANT: If you cannot meet these minimum clearances, you must operate heater with chimney flue damper open. Go to Installing Damper Clamp Accessory for Vented Operation, page 8.

Continued

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103426

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Contents DESA INTERNATIONAL OWNER’S OPERATION AND INSTALLATION MANUALwhere not prohibited by state or local codes —WHAT TO DO IF YOU SMELL GASSAFETY INFORMATION UNVENTED NATURAL GAS LOG HEATERWARNINGS PRODUCT IDENTIFICATION PRODUCT FEATURESSafety Device LOCAL CODESDETERMINING AIR FLOW FOR HEATER LOCATION AIR FOR COMBUSTION AND VENTILATIONPROVIDING ADEQUATE VENTILATION Unusually Tight ConstructionVentilation Air From Inside Building ContinuedVENTILATION AIR Ventilation Air From OutdoorsIf Not Using Mantel INSTALLATIONINSTALLATION AND CLEARANCES CHECK GAS TYPEDetermining Minimum Mantel Clearance If Using MantelMantel Clearances INSTALLATIONUNVENTED NATURAL GAS LOG HEATER Floor ClearancesINSTALLATION ContinuedINSTALLATION INSTALLING HEATER BASE ASSEMBLYInstallation Items Needed ContinuedInstallation Items Needed CONNECTING TO GAS SUPPLYINSTALLATION UNVENTED NATURAL GAS LOG HEATERCHECKING GAS CONNECTIONS Pressure Testing Gas Supply Piping SystemPressure Testing Heater Gas Connections Test Pressures In Excess Of 1/2 PSIGUNVENTED NATURAL GAS LOG HEATER INSTALLING LOGS American Oak Design ModelsINSTALLATION ContinuedFigure 22 - Installing Bottom Middle Log INSTALLING LOGS Split Oak Design ModelsINSTALLATION Figure 24 - Installing Top Log #4READ BEFORE LIGHTING Thermostat-ControlledModels FOR YOUR SAFETYOPERATING HEATER LIGHTING INSTRUCTIONSThermostat Controlled Models MANUAL LIGHTING PROCEDUREManually-ControlledModels FOR YOUR SAFETY TO TURN OFF GAS TO APPLIANCEVARIABLE CONTROL OPERATION INSPECTING BURNERSManually-ControlledModels PILOT FLAME PATTERNODS/PILOT AND BURNERS CLEANING AND MAINTENANCEFRONT BURNER FLAME PATTERN LOGSPOSSIBLE CAUSE TROUBLESHOOTINGOBSERVED PROBLEM REMEDYMaintenance, page TROUBLESHOOTINGOBSERVED PROBLEM ContinuedMaintenance, page TROUBLESHOOTINGOBSERVED PROBLEM UNVENTED NATURAL GAS LOG HEATEROPTIONAL POSITIONING OF THERMOSTAT SENSING BULB For Masonry and Factory- built Metal FireplaceSERVICE HINTS SPECIFICATIONSREPLACEMENT PARTS TECHNICAL SERVICEBLACK FIREPLACE HOOD - GA6050 ACCESSORIESMANUAL SHUTOFF VALVE - GA5010 BRASS FIREPLACE HOOD - GA6052CFS18NVB VS24NVB CFS24NVB VS30NVB CFS30NVB ILLUSTRATED PARTS BREAKDOWN4Variable Manually Controlled Models VS18NVB UNVENTED NATURAL GAS LOG HEATERPART NUMBER FOR PARTS LISTVariable Manually-ControlledSplit Oak Models VS18NVB/CFS18NVBILLUSTRATED PARTS BREAKDOWN UNVENTED NATURAL GAS LOG HEATERPART NUMBER FOR Thermostat-ControlledSplit Oak ModelsPARTS LIST VS18NTAVL30NV ILLUSTRATED PARTS3 BREAKDOWNVariable Manually-Controlled Models VL18NV VL24NV UNVENTED NATURAL GAS LOG HEATERPART NUMBER FOR Variable Manually-ControlledAmerican Oak ModelsPARTS LIST VL18NVUNVENTED NATURAL GAS LOG HEATER Page LIMITED WARRANTY VENT-FREENATURAL GAS LOG HEATERS WARRANTY INFORMATIONNOT A UPC