Lennox Merit 14ACX−018−230 Installation Instructions Manual page 19

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.
LOW VOLTAGE CONTROL WIRING
NOTE Wire tie provides low voltage control wire strain relief and to
maintain separation of field installed low and high voltage circuits.
NOTE For proper voltages, select thermostat wire (control wires)
gauge per table above.
NOTE Do not bundle any excess 24VAC control wires inside
control panel.
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)
WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS) 16
AWG# INSULATION TYPE
18 TEMPERATURE RATING
35ºC MINIMUM.
Figure 15. Typical Field Wiring Diagram
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
HIGH VOLTAGE
FIELD WIRING
LOW VOLTAGE
FIELD WIRING
FACTORY
WIRING
THERMOSTAT
POWER
R
HEAT
W1
COOLING
Y
INDOOR
BLOWER
G
COMMON
C
Page 19
SINGLE PHASE
B
CONTROL
WIRING
HIGH VOLTAGE
FLEXIBLE
CONDUIT
INDOOR UNIT
R
OUTDOOR
W
YELLOW
UNIT
Y1
Y
G
BLACK
C
C
A
GROMMET AND
WIRE TIE
14ACX SERIES