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INSTALLATION INSTRUCTIONS
I f your cabinet space is between 20" and
23-1/2" deep, the metal duct extension is
NOT needed. Attach the registers directly
to the unit knockout openings. Do NOT in-
sert the registers more than 1/2" into the
knockouts. In some installations registers
will need to be cut to fit the cabinet space.
See "FIG. 9" on page (10) for the order
of installation and installation kit compo-
nent part list.
8. After the registers have been installed, install
the inside grille to the cabinet front.
W hen unit is installed with air distribution
ducts to carry the conditioned air to re-
mote areas of the interior space, the ducts
MUST be sized to maintain a static pres-
sure at the blower outlet between 0.0 and
0.6 inches of water column on high speed.
G.
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.
c. Remove junction box cover. See "FIG. 9" on
page (10).
d. Route the previously run 120 Vac supply
wire through the strain relief and into junc-
tion box. Tighten strain relief making sure not
to damage wires. Leave enough wire inside
junction box to connect to unit 120 Vac wires.
e. Connect the wires in the junction box to the
120 Vac supply wire using appropriate size
wire connectors.
● Active to Black
● Neutral to White
● Earth to Green/Yellow
f. Tape the connectors to the supply to ensure
they don't vibrate loose.
g. Install junction box cover.
2. Low Voltage Wiring Connections
a. Verify the positive (+) 12 Vdc
terminal is disconnected from supply battery.
Otherwise, damage to unit could occur.
b. Connect the previously run +12 Vdc supply
wire to the red wire protruding from unit.
c. Connect the previously run –12 Vdc supply
wire to both the black wire protruding from
the unit and to the wire of the three wire cable
that goes to the thermostat 12V– terminal.
T he low voltage connection can be
made without removing the electri-
cal box cover. The low voltage leads
MUST be tucked back inside the elec-
trical box.
d. Connect the previously run furnace wires (if
applicable) to the blue/white wires protruding
from the unit. The polarity of this connection
does not matter.
e. Connect the red/white wire protruding from
the unit to the wire of the three wire cable
that goes to the thermostat 12V+ terminal.
f. Connect the orange wire protruding from the
unit to the wire of the three wire cable that
goes to the thermostat COMMS terminal.
H.
Thermostat And Communication Cable
Installation
W ire colors listed for the communication ca-
ble (3 conductor cable) match the wire colors
in the unit wire harness. Available wire colors
may vary.
1. Remove the cover from the LCD SZ thermostat.
Depress tab on bottom of thermostat and sepa-
rate it from the base.
2. Insert the previously run communication cable
(3 conductor cable) through the hole in the base
assembly.
3. Cut back the outer cable shield approximately 3
inches and strip 1/4" insulation from each wire.
4. Mount the thermostat level on the wall using the
screws provided.
5. Make the following connections to the thermo-
stat. See (FIG. 6).
FIG. 6
8
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