Lennox Collection XC21 System Installation Instructions Manual page 20

3
A. ROUTE COnTROL WIRES
Install low voltage control wiring from outdoor to indoor unit and from
thermostat to indoor unit.
A Run 24VAC control wires through hole with grommet.
B Make 24VAC control wire connections to heat pump control (A175) .
NOTE Do not bundle any excess 24VAC control wires inside control box.
NOTE Wire tie provides low voltage wire strain relief and to maintain
separation of field installed low and high voltage circuits.
NOTE For proper voltages, select control wires gauge per table below.
WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS) 16
B. ROUTE COnTROL WIRES
Maximum length of wiring (18 gauge) for all connections on the RSBus is limited to 1500 feet (457 meters). Color−coded, temperature rating 95
minimum, solid core. (Class II Rated Wiring)
4
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 in the bottom of the control box. Connect conduit to the control box using a proper conduit fitting.
HIGH VOLTAGE
CONDUIT HOLE
WATERTIGHT
CONDUIT
FITTING
WATERTIGHT
FLEXIBLE
CONDUIT
TO SERVICE
DISCONNECT BOX
506587−01
NOn−COMMUNICATING
AWG# INSULATION TYPE
18 TEMPERATURE RATING
35ºC MINIMUM.
COMMUNICATING
PIPING PANEL
COnTROL BOX
GROUND LUG
CONTACTOR
ELECTRICAL INLET (CONTROL WIRING
USE BUSHING PROVIDED IN BAG ASSEMBLY HERE.
B
HEAT PUMP
CONTROL (A175)
ELECTRICAL INLET
(HIGH VOLTAGE)
WIRING ENTRY POINTS
LOW VOLTAGE).
Page 20
COnTROL BOX
A
HOLE
ACCESS VIEW
º º
F (35 C)