8

INSTALLATION

Installation and Clearances for Vent-Free Operation (Cont.)

INSTALLATION

Continued

Carefully follow the instructions below. This will ensure safe installation into a masonry, UL127-listed manufactured fireplace, or listed vent-free firebox.

Minimum Clearances For Side Combustible Material, Side Wall, and Ceiling

A.Clearances from the side of the fireplace cabinet to any com- bustible material and wall should follow diagram in Figure 4.

Example: The face of a mantel, bookshelf, etc. is made of combustible material and protrudes 3 1/2" from the wall. This combustible material must be 4" from the side of the fireplace cabinet (see Figure 4).

Note: When installing your gas logs into a manufactured firebox, follow firebox manufacturer’s instructions for minimum clear- ances to combustible materials.

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

Example

*

*Minimum 16 inches from Side Wall

Figure 4 - Minimum Clearance for Combustible to Wall

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 fire- place opening is not needed. Go to Installing Damper Clamp Accessory for Vented Operation, page 10.

noncombustible material behind it. Noncombustible material must extend at least 8" up. If noncombustible material is less than 12", you must install the fireplace hood accessory. See Figure 5 for minimum clearances.

If Using Mantel

You must have noncombustible material(s) above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have noncombustible material behind it. Noncombustible material must extend at least 8 inches up. If noncombustible material is less than 12", you must install the fireplace hood accessory. Even if noncom- bustible material is more than 12", you may need the hood accessory to deflect heat away from your mantel shelf. See Figure 5 and Figures 6 and 7, page 9, for minimum clearances.

IMPORTANT: If you cannot meet these minimum clearances, you must operate heater with chimney flue damper open. Go to Install- ing Damper Clamp Accessory for Vented Operation, page 10.

Noncombustible

 

Requirements for

Material Distance (A)

 

Safe Installation

 

 

 

 

 

 

12" or more

 

Noncombustible material OK.

Between 8" and 12"

 

24" ,30" or 36" Models: Install

 

 

fireplace hood accessory (GA6050,

 

 

GA6052, or GA6053 see Accesso-

 

 

ries, page 27).

 

 

18" Model: Noncombustible

 

 

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

 

 

 

 

 

 

 

Material

 

 

 

 

 

 

 

 

 

(A)

 

 

 

 

 

 

Minimum Noncombustible Material Clearances

If Not Using Mantel

Note: If using a mantel proceed to If Using Mantel. If not using a mantel, follow the information on this page.

You must have noncombustible material(s) above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have

Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace

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Desa LDL3924PR, LDL3930PR, LDL3930NR installation manual Minimum Noncombustible Material Clearances, If Not Using Mantel

LDL3924PR, LDL3930NR, LDL3930PR specifications

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