Control Wiring - Lennox T?Class TSA*S4 Units Installation Instructions Manual

ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING
HIGH VOLTAGE / 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 panel. Connect conduit to the control panel using a proper conduit fitting.

CONTROL WIRING

Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit as illustrated.
A Run 24VAC control wires through hole with grommet
and secure with provided wire tie.
B Make 24VAC thermostat wire connections. Locate the
two wires from the contactor and make connection
using field provided wire nuts:
S
Yellow to Y1
S
Black to C (common)
NOTE For proper voltages, select thermostat wire (control wires)
gauge per table below.
NOTE Do not bundle any excess 24VAC control wires
inside control panel.
TYPICAL LOW VOLTAGE FIELD
WIRING
THERMOSTAT INDOOR UNIT
POWER
R
HEAT
W1
COOLING
Y
INDOOR
BLOWER
G
COMMON
C
WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS) 16
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
HIGH VOLTAGE
R
CONNECTIONS
(CONTACTOR)
OUTDOOR
W
UNIT
Y1
Y
G
C
C
AWG# INSULATION TYPE
18 TEMPERATURE RATING
35ºC MINIMUM.
THREE PHASE
HIGH VOLTAGE FLEXIBLE
CONDUIT
NOTE Wire tie provides low voltage control wire strain
relief and to maintain separation of field installed low and
high voltage circuits.
SINGLE PHASE
GROUND
HIGH VOLTAGE
FLEXIBLE CONDUIT
Page 17
B
CONTROL
WIRING
A
GROMMET AND
WIRE TIE
B
CONTROL
WIRING
A
GROMMET AND
WIRE TIE
HIGH VOLTAGE
FIELD WIRING
LOW VOLTAGE
FIELD WIRING
FACTORY
WIRING
TSA*S4 SERIES