Wiring For Control System Components - Lennox iComfort S30 Installation And Setup Manual

The figure below illustrates the basic Lennox communication control wiring to all system components.
FURNACE (IFC) OR AIR HANDLER (AHC)
OPTIONAL DISCHARGE AIR
SENSOR (SEE DAS NOTE ON
PAGE 5)
OPTIONAL OUTDOOR AIR
SENSOR (SEE OAS NOTE ON
PAGE 5)
SMART HUB
C
i-
i+
HD DISPLAY
R
A
A
B
B
i+
i+
-
-
MAXIMUM TOTAL LENGTH OF ALL CONNECTIONS ON THE RSBUS IS LIMITED TO 1500FT.
WIRE GAUGE OF RSBUS WIRE IS 18.
®
Figure 3. iComfort
DAS NOTE: The discharge air sensor is intended to be mounted downstream of the heat exchanger and air conditioning coil. It must be placed in free airflow, where other
accessories (such as humidifiers, UV lights, etc.) will not interfere with its accuracy. Wiring distance between the IFC or AHC and the discharge air sensor should not
exceed 10 feet when wired with 18-gauge thermostat wire. 2
OAS NOTE: The optional outdoor temperature sensor wiring distance between the IFC or AHC should not exceed 200 feet when wired with 18-gauge thermostat wire.
RSBUS NOTE Maximum total length of all connections on the RSBus is limited to 1500 ft. (450 m). Maximum length between components is 300 ft. (90 m).

WIRING FOR CONTROL SYSTEM COMPONENTS

®
iComfort
OUTDOOR UNIT
Communicating System Wiring
OPTIONAL DISCHARGE AIR SENSOR
(SEE DAS NOTE ON PAGE 5)
A
®
IComfort
B
i+
(AC OR HP)
-
DISPLAY
MAXIMUM TOTAL LENGTH OF ALL
CONNECTIONS ON THE RSBUS IS
LIMITED TO 1500FT.
WIRE GAUGE OF RSBUS WIRE IS 18.
Figure 4. iComfort
1
5
®
iComfort AIR HANDLER (AHC)
SMART HUB
RSBUS
A
B
i+
-
HD
®
Communicating Indoor/Non-Communicating Outdoor
(HP) System Wiring
OPTIONAL OUTDOOR
AIR SENSOR (SEE OAS
NOTE ON PAGE 5)
SETUP NOTES:
CUT Y1-Y2 ON-BOARD
LINK FOR 2-STAGE OUT­
DOOR UNITS
CUT R-O ON-BOARD
LINK FOR OUTDOOR
HEAT PUMP UNITS
24VAC
HEAT PUMP UNIT
- 1 OR 2 STAGE