506860-03
Issue 1946
Page 13 of 27
Figure 7.
Indoor Control
Outdoor Unit
Connect single wire
to terminal C
NOTE
:
On communicating systems, extra wires must terminate on the indoor “C” Comfort Sync
TM
terminal strip (RSBus). Use an additional wire to connect all unused wires to “C” terminal on the indoor
control ONLY.
Comfort Sync
TM
Thermostat
Connect single wire
to terminal C
All unused wires
All unused wires
Comfort Sync
TM
Thermostat with
Comfort Sync
TM
-enabled Furnace / Air Handler and
Non-Communicating Heat Pump
Comfort Sync
TM
Thermostat with
Comfort Sync
TM
-enabled Furnace / Air Handler and
Comfort Sync
TM
-enabled Heat Pump
COMFORT SYNC
TM
-
ENABLED FURNACE
OR AIR HANDLER
RSBus
RSBus
OPTIONAL
DISCHARGE
AIR SENSOR
COMFORT SYNC
TM
THERMOSTAT
COMFORT SYNC
TM
-
ENABLED HEAT PUMP
RSBus
OPTIONAL
OUTDOOR
AIR SENSOR
OPTIONAL
DISCHARGE
AIR SENSOR
COMFORT SYNC
TM
-
ENABLED FURNACE
OR AIR HANDLER
COMFORT SYNC
TM
THERMOSTAT
NON-COMMUNICATING
HEAT PUMP
1 OR 2 STAGE
NOTES:
Maximum total length of all connections on the RSBus is limited to 1500 ft.
Wire gauge of RSBus wire is 18.
Cut Y1-Y2 on-board link for 2-stage outdoor units
Cut R-O on-board link for outdoor heat pump units
Field Wiring and Routing - Communicating Controls
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 95ºF (35ºC) minimum, and solid core (Class II Rated Wiring). All low voltage wiring must
be connected through the low voltage grommet in the control box.
