7
H. Installation Preparation
1. Check gasket alignment of the unit over the roof
opening and adjust if necessary. Unit may be moved
from below by slightly lifting. See FIG. 6.
2. Remove air distribution box and mounting hardware
from carton. The upper duct is shipped inside the
lower duct which is part of the ceiling template.
3. All models listed in this manual will use a four (4)
bolt pattern for installing the air distribution box kit.
These bolts are furnished in the SZLCD control kit.
4. Remove upper duct from ceiling template and
locate it over blower discharge. See FIG. 7.
Note: Edges without anges install toward REAR and
SIDE of opening.
5. Use two (2) sharp pointed #10 sheet metal screws
to hold duct to base pan. Screw holes are provided
in bottom of base pan for these screws.
6. Reach up into the return air opening and pull the
unit electrical cord down for later connection. See
FIG. 8.
FIG. 8
Center Unit
From Below
Pull Down
Electrical Cord
Measure Ceiling
Thickness
Note: In some applications it may be necessary to extend the
6 pin cable. Order cable number 3105584.001 if needed.
7. Measure the ceiling to roof thickness:
a. If distance is 2"-3", remove perforated tabs
from lower duct. See FIG. 9.
b. If distance is 3"-4", install ducts as received.
See FIG. 9.
c. If distance is 4"-6", use optional 3106775.004
Duct Adaptor and 3100895.006 Bolt Kit.
8. Remove the junction box cover from the SZLCD
control box.
9. Plug the electrical cord (6 pin connector) from the
upper unit into the mating connector in the SZLCD
control box.
Note: Plastic SZLCD control boxes will need to have the
supplied freeze control sensor plugged into the matching
connector in the SZLCD control box.
10. Insert the freeze control sensor into the evaporator
coil ns approximately 1" above the bottom of the
coil ns and on the left side as shown in FIG. 10.
Bend ns over sensor to secure in place.
Roof Gasket
FIG. 6
Side Without
Tabs Are To Rear
And Side Of Unit
Screw
Lower
Duct
Screw
Upper
Duct
FIG. 7
Step a
Remove At
Perforation
Step b
Use As
Packaged
Upper Discharge
Air Duct
Lower Discharge
Air Duct
FIG. 9
FIG. 10
Freeze Control
Sensor
Remove Hang
Tag
Route Up Through
Return Air Opening
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