LG P1BRENTW-A - Manual (Page 22)

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3.6.2 AC CHIMNEY OUTSIDE AIR KIT (Optional)
* The outside air assembly for the AC (Air Cool) chimney is mandatory in some areas.
Check with your local building authority for the requirements in your area.
All required parts for outside air assembly are contained in the following kit: ACZIB
1) Install the outside air kit box and collar on the top of the unit. Install the flex 4" adaptor on
the top of the outside air kit box.
2) Install the outside air register as described in the preceding section (3.6.1). Connect the
outside air register to the 4" flex adaptor with the flex pipe. Respect the installation
guidelines A) to E) from the preceding section (3.6.1).
Figure 20
Chimney outside air kit installation