Page 14
6
ROUTE CONTROL WIRES
Maximum length of wiring (18 gauge) for all connections on the RSBus is 1500 feet (457 meters). Wires should be color-coded, with
a temperature rating of 95
º
F (35
º
C) minimum, and solid-core (Class II Rated Wiring). All low voltage wiring must enter unit through
field-provided field-installed grommet installed in electrical inlet.
The iComfort Wi-Fi
®
thermostat requires four thermostat wires between the thermostat and the furnace / air handler iComfort
®
control
and four wires between the outdoor unit and the furnace/air handler iComfort
®
control. When a thermostat cable with more than four
wires is used, the extra wires must be properly connected to avoid electrical noise (see below).
Use a wire nut to bundle the four unused wires at each end of the cable. Each bundle should also include an additional wire that should
be connected on each end to the C terminal as shown in the figure below.
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 on the bottom of the control box. Connect conduit to the control box using a proper conduit fitting.
ROUTE HIGH VOLTAGE AND GROUND WIRES
7
Indoor Control
Single Wire To
C Terminal
Unused Wires
Unused Wires
Single Wire To C Terminal
OUTDOOR UNIT
PROVIDED RAST
6-PIN CONNECTOR
CONNECTS TO
RAST 6-PIN
CONNECTOR
ROUTE CONTROL
WIRING THROUGH
GROMMET AND
SECURE WITH
CABLE TIE
GROMMET AND
CABLE TIE.
USE WATERTIGHT
CONDUIT FOR HIGH
VOLTAGE
CONNECT CONDUIT
TO CUTOUT AND
ROUTE HIGH
VOLTAGE WIRING
INDOOR CONTROL
FIGURE 14
