Control Wiring; Low Voltage Wiring - Lennox T?CLASS TPA024S4 Unit Information

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.
B Make 24VAC thermostat wire connections to CMC1.
NOTE Do not bundle any excess 24VAC control wires inside
control panel.
NOTE For proper voltages, select thermostat wire (control
wires) gauge per Table above.
WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS) 16
TYPICAL CONTROL WIRING

Low Voltage Wiring

Thermostat Indoor Unit
power
R R
common
C
C
1st. stage aux. heat
W1 W1
W2
W3
indoor blower
G
G
reversing valve
O
compressor
Y1
(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)
Low Voltage Wiring (with Auxiliary Heat)
Thermostat Indoor Unit
power
R
common
C
emergency heat
E
W1 W1
1st. stage aux. heat
W2
W3
indoor blower
G
reversing valve
O
compressor
Y1
(SOME CONNECTIONS MAY NOT APPLY. REFER TO
SPECIFIC THERMOSTAT AND INDOOR UNIT.)
AWG# INSULATION TYPE
18 TEMPERATURE RATING
35ºC MINIMUM.
Outdoor Unit
power
R
common
C
1st. stage aux. heat
W1
O
Y1
Outdoor Unit
power
R
R
common
C
C
emer.
heat
relay
outdoor t'stat
W1
1st. stage aux. heat
G
O
Y1
THREE PHASE
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
CUTOUT FOR HIGH
VOLTAGE CONDUIT
GROMMET AND WIRE TIE FOR
CONTROL WIRES
NOTE Wire tie provides low voltage wire strain relief and
to maintain separation of field installed low and high voltage
circuits.
SINGLE PHASE
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
CUTOUT FOR HIGH
VOLTAGE CONDUIT
Page 19
DEFROST CONTROL
BOARD (CMC1)
CONTROL WIRE
CONNECTIONS
A
DEFROST CONTROL
BOARD (CMC1)
A
GROMMET AND WIRE TIE
FOR CONTROL WIRES
B
HIGH VOLTAGE
FIELD WIRING
LOW VOLTAGE
FIELD WIRING
FACTORY
WIRING
B
CONTROL WIRE
CONNECTIONS