Page 37 © 2009 McQuay International 800-432-1342 www.mcquay.com
IM 1023 - Fresh Air Damper Kit
The fresh air damper kit provides up to 25% outside air to the
fan coil. It consists of an intake with damper blade and insect
screen. The damper may be manually controlled through the
return air opening or with an optional field-installed damper
motor.
Installation Instructions
1 Locate components and remove from carton. Kit
includes:
• Damper box
• Screen
2 Place the screen against the opening in the back of the
unit base. See Figure 1.
Figure 1: Place Screen Against Opening in Unit Base
3 Slide the damper box in place against the screen,
matching the dimples on the bottom of the damper box to
the slots on the unit base (see Figure 2).
Figure 2: Slide the Damper Against the Screen
4
To secure the damper to the unit, bend the tabs in the unit
base pan against the left and right edges of the damper
(see Figure 3).
Figure 3: Secure Damper with Tabs in Unit Base Pan
Installation and Maintenance Manual IM 1023
Fresh Air Damper Kit for
ThinLine™ 3G Vertical Fan Coils
Group: Applied Air Systems
Part Number: 668115702
Date: August 2009
CAUTION
Sharp metal edges are potential injury hazards. Wear
protective gloves.
Align dimples on bottom of the
damper box with slots in base pan.
Bend tabs in base pan over damper
edge to secure in place.
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