Low Voltage Connections - Lennox Merit Series Installation Instructions Manual

3

LOW VOLTAGE CONNECTIONS

A
CUTOUT WITH GROMMET
B
Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated. See figures 14 and 15 for typical field
connections when connecting unit to either a CBX32MV or CBX40UHV in non-communicating mode. For connections to other Lennox air handlers
or furnaces, see the ComfortSense® 7000 installation instruction for further wiring diagrams.
4
HIGH VOLTAGE POWER SUPPLY CONNECTIONS
NOTE - Any excess high voltage field wiring
should be trimmed and secured away from
any low voltage field wiring.
cated in the bottom of the control box. Connect
conduit to
duit fitting.
C
24VAC
CONNECTIONS
24V CONTROL WIRES
GROUND
G
L1
HIGH VOLTAGE FIELD WIRING
LOW VOLTAGE (24V) FIELD WIRING
WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS)
NOTE - For proper voltages, select thermostat wire (control wires)
gauge per table above.
NOTE - Do not bundle any excess 24VAC control wires inside
control box.
A. Run 24VAC control wires through cutout with grommet.
B. Run 24VAC control wires through wire tie.
C. Make 24VAC control wire connections.
D. Tighten wire tie to security 24V control wiring.
NOTE - Wire tie provides low voltage wire strain relief and maintains
separation of field-installed low and high voltage circuits.
D
TIGHTEN WIRE TIE
FIGURE 11
OUTDOOR UNIT
CONTROL BOX
L2
CONDUIT
CUTOUT
CONDUIT
FIGURE 12
Page 11
AWG# INSULATION TYPE
18 TEMPERATURE RATING
16 35ºC MINIMUM.