LG ELITE ME43BK SP User Manual

Page 8

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

8

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Hearth Extension Requirements

(refer to Figure 7)
A non-combustible hearth extension must

be built in front of the fireplace and extend

out on both sides. Hearth extensions must

be constructed according to the following

guidelines:

1. A layer of sheet metal 0.018" (0.45mm) thick

or 3/8" (9mm) thick insulating board or any

other material (tiles, marble, granite) with

equivalent heat resistance may be used.

Check with the local building authorities

before installing to determine what other

materials are acceptable in your area.

2. The hearth extension should be secured to

the floor. The gap between the fireplace and

the hearth extension must be sealed with

non-combustible caulking or cement.

3. On a raised base or raised hearth, a “Z” shape

piece of metal must be fabricated to join the

bottom of the fireplace to the floor.

Outside Air Assembly

The outside air assembly is mandatory for

the fireplace.

During operation, the fireplace requires air for

combustion and draws air out of the house. It

may starve other fuel burning appliances such

as gas or oil furnaces. As well, exhaust fans

and fan driven appliances may compete for

air, causing a negative pressure in the home,

resulting in smoke entering the home from

the fireplace. This situation is aggravated in

modern airtight houses.

To overcome this potential problem, the

installation of an outside air assembly is

required to provide outside combustion air to

the fireplace.

Outside Air Installation

The outside air assembly must be installed

according to the following guidelines:

1. The maximum length of 4" I.D. (100 mm)

insulated flexible duct is 20 feet (6.1 m). If a

longer duct is required, use a 6" I.D. (150mm)

insulated flexible duct. The maximum length

is 40 feet (12 m). Refer to Figures 8B and

8C for connections.

2. The duct and register may be installed above

or below floor level.

3. The outside air register must not be installed

more than 7 feet (2.1 m) above the base of

the fireplace.

4. The outside air assembly must draw air from

outside the house. It must not draw air from

the attic, the basement or a garage.

5. Locate the outside register where it will be

well away from automobile exhaust fumes

or other vents.

6. The outside air register should be installed

where it is not likely to be blocked by snow

or exposed to extreme wind.

7. It is recommended to install the outside air

register at floor level. However, if you must

raise the air register above the fireplace level,

you will have to make a loop to the floor with

the flexible pipe to prevent from causing a

draft in the outside air register (see Figure

8 Detail A).

Figure 8

OUTSIDE

INTAKE

ALUMINIUM TAPE

PLASTIC

COVER

FLEXIBLE PIPE

SCREW

OPENING

FACING DOWN

WALL

OUTSIDE AIR CONNECTION

TO THE FIREPLACE

FIREPLACE

CONNECTION

ALUMINIUM

TAPE

INSULATION

FLEXIBLE

PIPE

FIREPLACE

PLASTIC COVER

LOOP IS MANDATORY

7' MAX.

OUTSIDE AIR CONNECTION

(Detail A)

(Detail B)

(Detail C)

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