Qmark CUS900 - Stock Cabinet Unit Heater - Manual (Page 4)

DUCTED APPLICATIONS
1. See Figure 3 for duct flange size and location.
2. Duct collars have been factory located (Bottom inlet, Front
inlet, Top discharge, Front discharge) as ordered.
3. To change duct collar location:
A. Heater duct panels are supplied with a duct collar attached
to one surface and a blank-off plate attached to the other
surface. The location of the duct collar and the blank-off
plate can reversed.
B. Remove screws holding blank-off plate and remove
blank-off plate.
C. Remove screws holding duct collar and remove duct collar.
D. Position duct collar to location desired, align screws holes,
insert and tighten screws to secure duct collar to duct
panel.
E. Position blank-off plate to location desired, align screw
holes, insert and tighten screws blank-off plate to duct
panel.
4. Position field ductwork to outside of heater duct flange.
5. Mark and drill starting holes in duct and flange.
6. Install and tighten screws (field supplied) to provide a
secure seal.
OPTIONAL
100% OUTSIDE AIR DAMPER
1. Flange brackets for the rear mounted duct collar are
packaged unassembled in the heater carton.
2. See Figure 2 for location of damper opening.
3. Position the top flange bracket with the flange at the top of
the damper opening and holes in the flange align with
holes in the cabinet back.
4. Attach flange to cabinet with screws provided.
5. Position and attach remaining three (3) flange brackets
around damper opening.
6. Position field ductwork to outside of flange brackets.
7.
Mark and drill starting holes in duct and flange.
8. Install and tighten screws (field supplied) to provide a
secure seal.
OPERATION OF OPTIONAL
100% OUTSIDE AIR DAMPER
1. Controls, consisting of an “OPEN-CLOSED” switch and
100% positioning potentiometer, are located on the
control panel door.
2. Place switch in OPEN position.
3. The damper will remain open until; the “OPEN-CLOSED”
switch is moved to the closed position.
TO REDUCE RISK OF FIRE AND ELECTRICAL
SHOCK: DO NOT EXCEED 0.2” WG EXTERNAL STATIC
PRESSURE. DO NOT MOUNT HEATER ON END PANEL
(LEFT OR RIGHT AIR FLOW).
WARNING
!
TO REDUCE RISK OF FIRE AND ELECTRICAL
SHOCK: DO NOT USE 100% OUTSIDE AIR DAMPER
OPTION WITH BOTTOM AIR INLET. USE ONLY FRONT AIR
INLET WITH 100% OUTSIDE AIR DAMPER OPTION.
WARNING
!
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