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Vent Door and Cable
The vent door is manually operated by a vent
control, which is located at the upper left side of the
unit behind the front cabinet. A cable connects the
vent control to the vent door. The door is factory-
set and locked in the closed position by 2 shipping
screws.
Only the air inside the room is circulated and
fi
ltered
when the door is in the closed position. When set to
the OPEN position, some outdoor air (up to 75 cfm)
will be drawn into the room. This will reduce the
heating or cooling ef
fi
ciency. A replaceable screen
in the vent inlet prevents unwanted matter from
entering the plenum.
The vent door assembly is attached to the air
conditioner with 5 Phillips-head screws. To replace
the vent door, it is necessary to remove the 2
Phillips-head shipping screws. The vent control cable
is attached to the door post and held in place with a
cable wire retainer.
Note:
It may be necessary to use a stubby Phillips-
head screwdriver to remove the 5 Phillips-head
screws.
Control Assembly
The user controls are located behind a door in the
top-right of the room cabinet. The room cabinet
must be removed to remove the control panel and
access the control assembly.
The control assembly consists of a main board and
a permanently attached operation board.
The control assembly is attached to the inside of
the control panel with 9 Phillips-head screws and 5
plastic locking tabs.
To check power to the main board from the low
voltage transformer, check for 24 VAC at the CN11
connecting wire. The main board should read
24 VAC between R and C. (See photo.)
Vent Door
Vent Control
Shipping Screw
Shipping Screw
Retainer
Post
Cable
To remove the control assembly:
1. Remove the room cabinet. (See
Room Cabinet
.)
2. Remove the 2 Phillips-head screws that attach
the control panel to the air conditioner. Lift the
control panel from the 2 top tabs.
Tabs
(Continued next page)
CN11
R
C
