Page 19
XPG20 SERIES
3
Install low voltage wiring from outdoor to indoor unit and
from thermostat to indoor unit as illustrated.
TYPICAL CONTROL WIRING CONNECTIONS
R
W3
C
G
R
C
Y2
Y1
W1
O
OUTDOOR UNIT
INDOOR UNIT TB1
R
O
THERMOSTAT
W2
Y2
Y1
O
Y2
Y1
G
C
W1
W1
Y2
OUT
L
L
DS
DS
NOTE
For proper voltages, select thermostat wire (control wires) gauge
per table above
.
WIRE RUN LENGTH
AWG# INSULATION TYPE
LESS THAN 100’ (30 METERS)
18 TEMPERATURE RATING
MORE THAN 100’ (30 METERS) 16 35ºC MINIMUM.
NOTE
Wire tie provides low voltage wire strain relief and to maintain
separation of field−installed low and high voltage circuits.
A
Run 24VAC control wires through hole with grommet.
B
Make 24VAC thermostat wire connections.
NOTE
Do not bundle any excess 24VAC control wires inside control box.
4
ROUTE THERMOSTAT WIRES
A
B
DEFROST CONTROL
BOARD (DCB)
CONTROL BOX
HOLE
NOTE
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.
5
ROUTE HIGH VOLTAGE AND GROUND WIRES
CONTROL BOX
PIPING PANEL
HIGH VOLTAGE
CONDUIT
HOLE
GROUND
LUG
CONTACTOR
WATERTIGHT
CONDUIT
FITTING
WATERTIGHT
FLEXIBLE
CONDUIT
TO AC
DISCONNECT
BOX
ACCESS VIEW
ELECTRICAL INLET
(HIGH VOLTAGE)
SOLAR MOD-
ULE WIRING
ELECTRICAL INLET
(CONTROL WIRING
− LOW VOLTAGE)
WIRING ENTRY POINTS
