Desa 103426-01 If Using Mantel, Mantel Clearances, Determining Minimum Mantel Clearance

Page 7
If Using Mantel

SPLIT OAK AND AMERICAN OAK DESIGN 18", 24" AND 30" MODELS

INSTALLATION

Continued

Non-Combustible

Requirements for

Material Distance (A)

Safe Installation

 

 

12" or more

Non combustible material OK.

Between 8" and 12"

24" or 30" Models: Install fireplace hood accessory

 

(GA6050 or GA6052, see Accessories, page 23).

 

18" Model: Non combustible material OK.

Less than 8"

Noncombustible material must be extended to at

 

least 8". See Between 8" and 12", above. If you

 

cannot extend material, you must operate heater

 

with flue damper open.

 

 

Heat Resistant Mantel Clearances

Material

(A)

Minimum Non Combustible Material Clearances

If Using Mantel

You must have non combustible material(s) above the fireplace opening. Non combustible 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 material must extend at least 8 inches up (for all models). If non combustible material is less than 12", you must install the fireplace hood accessory (24" and 30" models only). Even if non combustible material is more than 12", you may need the hood accessory to deflect heat away from your mantel shelf. See chart below and Figures 7 and 8 (page 8) 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 Opera- tion, page 8.

Figure 6 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace

Non-Combustible

Requirements for

Material Distance (A)

Safe Installation

 

 

 

12" or more

Non combustible material OK.

Between 8" and 12"

24" or 30" Models: Install fireplace hood accessory

 

(GA6050 or GA6052, see Accessories, page 23).

 

18" Model: Non combustible material OK.

Less than 8"

Non combustible material must be extended to at

 

least 8". See Between 8" and 12", above. If you

 

cannot extend material, you must operate heater

 

with flue damper open.

 

 

 

10"

8"

6"

21/2"

Mantel Shelf

Underside of

Mantel Shelf

Mantel Clearances

In addition to meeting non-combustible material clearances, you must also meet required clearances between fireplace open- ing and mantel shelf. If you do not meet the clearances losted below, you will need a hood.

Minimum Non-

Combustible

Material

(A)

12"

8"

20"

14"

 

 

All minimum

 

 

distances are

 

 

in inches

 

 

Log Set

241/2" 271/2" 30"

 

24"/30" Models

 

163/4" 181/2" 20"

 

18" Model

 

 

Top of Fireplace

 

Opening

Determining Minimum Mantel Clearance

If you meet minimum clearance between mantel shelf and top of fireplace opening, a hood is not required (see Figure 7).

Minimum Non-

Distances to

Combustible

Underside of

Material Height

Mantel

Continued Figure 7 - Minimum Mantel Clearances Without Using Hood

103426

7

Page 6 Page 8
Image 7
Page 6 Page 8
Contents —WHAT TO DO IF YOU SMELL GAS OWNER’S OPERATION AND INSTALLATION MANUALwhere not prohibited by state or local codes DESA INTERNATIONALUNVENTED NATURAL GAS LOG HEATER SAFETY INFORMATIONWARNINGS LOCAL CODES PRODUCT FEATURESSafety Device PRODUCT IDENTIFICATIONUnusually Tight Construction AIR FOR COMBUSTION AND VENTILATIONPROVIDING ADEQUATE VENTILATION DETERMINING AIR FLOW FOR HEATER LOCATIONVentilation Air From Outdoors ContinuedVENTILATION AIR Ventilation Air From Inside BuildingCHECK GAS TYPE INSTALLATIONINSTALLATION AND CLEARANCES If Not Using MantelINSTALLATION If Using MantelMantel Clearances Determining Minimum Mantel ClearanceContinued Floor ClearancesINSTALLATION UNVENTED NATURAL GAS LOG HEATERContinued INSTALLING HEATER BASE ASSEMBLYInstallation Items Needed INSTALLATIONUNVENTED NATURAL GAS LOG HEATER CONNECTING TO GAS SUPPLYINSTALLATION Installation Items NeededTest Pressures In Excess Of 1/2 PSIG Pressure Testing Gas Supply Piping SystemPressure Testing Heater Gas Connections CHECKING GAS CONNECTIONSContinued INSTALLING LOGS American Oak Design ModelsINSTALLATION UNVENTED NATURAL GAS LOG HEATERFigure 24 - Installing Top Log #4 INSTALLING LOGS Split Oak Design ModelsINSTALLATION Figure 22 - Installing Bottom Middle LogLIGHTING INSTRUCTIONS Thermostat-ControlledModels FOR YOUR SAFETYOPERATING HEATER READ BEFORE LIGHTINGTO TURN OFF GAS TO APPLIANCE MANUAL LIGHTING PROCEDUREManually-ControlledModels FOR YOUR SAFETY Thermostat Controlled ModelsPILOT FLAME PATTERN INSPECTING BURNERSManually-ControlledModels VARIABLE CONTROL OPERATIONLOGS CLEANING AND MAINTENANCEFRONT BURNER FLAME PATTERN ODS/PILOT AND BURNERSREMEDY TROUBLESHOOTINGOBSERVED PROBLEM POSSIBLE CAUSEContinued TROUBLESHOOTINGOBSERVED PROBLEM Maintenance, pageUNVENTED NATURAL GAS LOG HEATER TROUBLESHOOTINGOBSERVED PROBLEM Maintenance, pageFor Masonry and Factory- built Metal Fireplace OPTIONAL POSITIONING OF THERMOSTAT SENSING BULBTECHNICAL SERVICE SPECIFICATIONSREPLACEMENT PARTS SERVICE HINTSBRASS FIREPLACE HOOD - GA6052 ACCESSORIESMANUAL SHUTOFF VALVE - GA5010 BLACK FIREPLACE HOOD - GA6050UNVENTED NATURAL GAS LOG HEATER ILLUSTRATED PARTS BREAKDOWN4Variable Manually Controlled Models VS18NVB CFS18NVB VS24NVB CFS24NVB VS30NVB CFS30NVBVS18NVB/CFS18NVB PARTS LISTVariable Manually-ControlledSplit Oak Models PART NUMBER FORUNVENTED NATURAL GAS LOG HEATER ILLUSTRATED PARTS BREAKDOWNVS18NTA Thermostat-ControlledSplit Oak ModelsPARTS LIST PART NUMBER FORUNVENTED NATURAL GAS LOG HEATER ILLUSTRATED PARTS3 BREAKDOWNVariable Manually-Controlled Models VL18NV VL24NV VL30NVVL18NV Variable Manually-ControlledAmerican Oak ModelsPARTS LIST PART NUMBER FORUNVENTED NATURAL GAS LOG HEATER Page WARRANTY INFORMATION LIMITED WARRANTY VENT-FREENATURAL GAS LOG HEATERSNOT A UPC
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