LG P1BRENTW-A - Manual (Page 21)

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3.6 OUTSIDE AIR KIT (Optional)
During operation, the fireplace requires fresh 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
may compete for air, causing negative pressure in the house, resulting in smoke entering the
house from the fireplace. This situation is aggravated in modern airtight houses. To overcome
this problem, we strongly recommend that you install an outside air assembly. Check with
local authorities having jurisdiction in your area, it may be mandatory.
NOTE: Should you decide not to install the outside air assembly, proceed as follows:
- Remove the bottom grill. The air box is located on front left and is on a slant.
- Unscrew the four screws holding the inside air box covering plate and remove it.
3.6.1 Outside Air Installation
The outside air assembly may be installed according to the following requirements :
A) Duct length should be kept to a minimum. The maximum length of duct is 20 ft.
(6.1 m) for a 4 in. dia. pipe (See note below).
B) The air intake register must not be installed more than 10 ft. (3050 mm) above the base of
the fireplace.
C) The fresh air must come from outside the house. The air intake must not draw air from
the attic, from the basement or garage.
D) The air intake should be installed where it is not likely to be blocked by snow or exposed
to extreme wind and away from automobile exhaust fumes, gas meters and other vents.
E) The duct and register may be installed above or below floor level.
The following components are required : - Outside air kit (UZI)
- 4" adapter for fireplace connection (supplied
with the unit)
Make a 4 ¼" (110 mm) hole in the outside wall of the house at the chosen location. From
outside, place the outside air register in the hole (open side down) and fasten the register to
the wall, with screws as shown (see figure 18). Slip the pipe into the insulated sleeve. Place
the insulated pipe over the register tube and over the fireplace’s outside air connector (see
figure 19). At each end, carefully pull back the insulation and plastic cover exposing the
flexible pipe. Using the aluminium tape provided, wrap the tape around the joint between
the flexible pipe and the air inlets. Carefully push the insulation and plastic cover back over
the pipe. Using aluminium tape, fasten the plastic cover in place.
NOTE: We recommend not to exceed 20 feet of 4” flexible pipe. If you require a longer
length we recommend that you use a 5” diameter flexible pipe for the complete run up to 30
feet and a 6” diameter pipe for a run of up to 40 feet.
Figure 18 Figure 19