Installation guide

8
INSTALLATION PROCEDURE
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).
Furnace
Wires
Gasket
Electrical
Cord
Control
Cables
AC Power
Supply
FIG. 8
In some applications it may be necessary
to extend the 6 pin connector. 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 318556.000
Duct Adaptor and 3100895.006 Bolt Kit.
Step a
Remove At
Perforation
Step b
Use As
Packaged
Upper Discharge
Air Duct
Lower Discharge
Air Duct
FIG. 9
8. Remove the junction box cover from the SZLCD
electronic control box.
9. Plug the electrical cord (6 pin connector) from
the upper unit into the mating connector in the
SZLCD electronic control box.
10. Plug the supplied freeze control sensor into the
matching connector in the SZLCD electronic
control box.
11. Insert the freeze control sensor into the evapora-
tor coil ns approximately 1″ above the bottom of
the coil ns and on the left side. See (FIG. 10).
Bend the ns over sensor to secure in place.
,
Freeze Control
Sensor
Remove Hang
Tag
Route Up Through
Return Air Opening
FIG. 10
H. Wiring System
1. 120 Vac Power Supply Connection
a.  ELECTRICAL SHOCK HAZ-
ARD. Verify 120 Vac power is disconnected
from RV. Failure to obey this warning could
result in death or serious injury.
b.  ELECTRICAL SHOCK HAZ-
ARD. Provide grounding in compliance with
all applicable electrical codes. Failure to
obey this warning could result in death or se-
rious injury.
Route the 120 Vac supply wire through the
strain relief in the SZLCD electronic con-
trol box. Tighten strain relief, making sure
enough wire is inside SZLCD electronic con-
trol box to connect with unit 120 Vac wires.
c. Connect the white to white; black to black;
and green or bare copper wire using appro-
priate size wire connectors.
d. Push the wires into the SZLCD electronic
control box and install the cover with the four
(4) blunt point screws provided.
2. Low Voltage Wire Connections At The SZLCD
Electronic Control Box.
a.  Verify the positive (+) 12 Vdc
terminal is disconnected from supply battery.
Otherwise, damage to unit could occur.