Lennox iComfort S30 Installation And Setup Manual page 13

OUTDOOR UNIT
Single wire to
terminal C
Unused wires
COMMUNICATING SYSTEMS USING THE ICOMFORT
BETWEEN THE OUTDOOR UNIT AND THE FURNACE/AIR HANDLER CONTROL. WHEN A THERMOSTAT CABLE WITH MORE THAN FOUR WIRES IS USED, THE EXTRA WIRES MUST BE PROPERLY CONNEC­
TED TO AVOID ELECTRICAL NOISE. THE WIRES MUST NOT BE LEFT DISCONNECTED.
BEST PRACTICES! KEEP ALL COMMUNICATION WIRING AS FAR AWAY FROM HOUSE ELECTRICAL WIRING AND LARGE ELECTRICAL APPLIANCES AS POSSIBLE (15' [5M] RECOMMENDED).
√ RSBUS MINIMUM WIRE SIZE IS 18 GAUGE
√ THE ICOMFORT® S30 DOES NOT REQUIRE SHIELDED CABLE WIRING.
√ MAXIMUM TOTAL LENGTH OF ALL CONNECTIONS ON THE RSBUS IS LIMITED TO 1500 FT. (450 M). MAX. LENGTH BETWEEN COMPONENTS
IS 300 FT. (90 M).
INDOOR UNIT CONTROLLER
Single wire to
terminal C
USE WIRE NUTS TO BUNDLE THE UNUSED WIRES AT EACH END
OF THE CABLE. A SINGLE WIRE SHOULD THEN BE CONNECTED
TO THE INDOOR UNIT END OF THE WIRE BUNDLE AND ATTACHED
TO THE "C" TERMINALS AS SHOWN IN THE DIAGRAM ABOVE.
®
S30 REQUIRE FOUR THERMOSTAT WIRES BETWEEN THE HD DISPLAY, SMART-HUB AND THE FURNACE/AIR HANDLER CONTROL AND FOUR WIRES
Figure 12. Thermostat Wire Termination in Communicating System
®
ICOMFORT S30
SMART HUB
COM
12VDC
BUS
+ -
A B
Single wire to
indoor unit terminal
C
Unused wires
13
®
ICOMFORT S30
MAG-MOUNT
COM
12VDC
BUS
+ -
A B
Single wire to bundle
wire to indoor unit
terminal C
Unused wires