14
Outside Air Connection
A limited amount of outside air can be brought into the
cassette unit [through the 2-9/16 inch (65 mm)] outside air
knockout to be conditioned and mixed into the supply air.
1. Remove the decorative cover panel if installed.
2. Remove the plastic outside air diverter by unscrewing
the screw shown in Figure 14.
4. Reinstall air diverter using the screw removed in step
2. See Figure 14.
5. Knock out the outside air supply opening. See Figure
17.
Figure 17. Typical Outside Air Knockout
Duct Screw
Holes (4)
Outside
Air
Knockout
Diverter color may vary from shown.
Figure 14. Typical Outside Air Diverter
Remove
Screw
Figure 16. Typical Outside Air Supply Channel with
Styrofoam Plug Removed
3.
Make sure the outside air supply channel is clear of
styrofoam and debris. It may be necessary to cut out
or punch through a styrofoam plug. See Figures 15
and 16.
6. Remove any insulation.
7. Connect the outside air duct to cassette body using
the four screw holes shown in Figure 18.
8. Relocate the indoor unit’s return air sensor to either
the controller (electronically) or physically by using the
remote sensor accessory.
9. The outside air supply duct length must be 10 feet or
less.
10.
Use a field-supplied booster fan to increase static
pressure.
Outside Air
Diverter
Figure 15. Typical Outside Air Supply Channel with
Styrofoam Plug Intact
