Lennox 4SCU23LX Installation Instructions Manual page 16

Variable capacity air conditioner
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CONNECTS TO
(2) RAST 6-PIN
CONNECTORS
LOW VOLTAGE
MAKE-UP BOX
ROUTE CONTROL
WIRING THROUGH
GROMMET AND
SECURE WITH
Route Control Wires
Comfort Sync Communicating Thermostat Wiring
Maximum length of wiring (18 gauge) for all connections
on the RSBus is 1500 feet (457 meters). Wires should
be color-coded, with a temperature rating of 95ºF (35ºC)
minimum, and solid-core (Class II Rated Wiring). All low
voltage wiring must enter unit through field-provided field-
installed grommet installed in electrical inlet.
Conventional 24VAC Non-Communicating Thermostat
Wiring
Wire Run Length
Less than 100' (30m)
More than 100' (30m)
Table 7. Conventional 24VAC Non-Communicating
Thermostat Wiring
Page 16 of 25
GROMMET AND
CABLE TIE
CABLE TIE
AWG#
Insulation Type
18
Temperature Rating
35°C Minimum
16
OUTDOOR UNIT
Figure 9.
Route High Voltage and Ground Wires
Any excess high voltage field wiring should be trimmed
and secured away from any low voltage field wiring. To
facilitate a conduit, a cutout is located on the bottom of
the control box. Connect conduit to the control box using a
proper conduit fitting.
Connect the 208/230 high voltage power supply from the
disconnect to the 4SCU23LX contactor as shown. Connect
the ground wire from the power supply to the unit ground
lug connection.
Issue 2231
CONNECT CONDUIT
TO CUTOUT AND
ROUTE HIGH
VOLTAGE WIRING
USE WATERTIGHT
CONDUIT FOR HIGH
VOLTAGE
508296-01

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