Lennox EL296DFV Installation Instructions Manual page 39

®
iComfort Thermostat with a Non-
Communicating Outdoor Unit
®
icCmforti Thermostat
®
iComfort -Enabled Indoor Furnace
Non-Communicating Outdoor Air Conditioner
icomfort
ENABLED
FURNACE
OPTIONAL
DISCHARGE
AIR SENSOR
iComfort®
THERMOSTAT
CLIP ON-BOARD LINK
W915 (Y1 TO Y2) FOR
TWO-STAGE OPERATION
Outdoor Unit
®
-
OPTIONAL
OUTDOOR
AIR SENSOR
NON-COMMUNICATING
OUTDOOR AIR
CONDITIONING UNIT -
1 OR 2 STAGE
Indoor Unit
Controller
Single wire to
terminal C
Unused wires
Communicating systems using the IComfort
stat wires between the thermostat and the furnace/air handler control and four
wires 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 connected to avoid electrical noise. The wires must not be left discon­
nected.
Use wire nuts to bundle the four 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 above.
iComfort
iComfortt-ENABLED Outdoor Unit
®
iComfort Thermostat
®
iComfort -Enabled Indoor Furnace
iComfortt-Enabled Outdoor Air Conditioner or Heat Pump
OPTIONAL
DISCHARGE
AIR SENSOR
OPTIONAL
OUTDOOR
AIR SENSOR
iComfort®
THERMOSTAT
Single wire to
terminal C
Unused wires
®
thermostat require four thermo­
FIGURE 56
Page 39
®
Thermostat with an
®
icomfort -
ENABLED
FURNACE
®
iComfort
OUTDOOR AIR CONDITIONING
OR HEAT PUMP UNIT
iComfort®
THERMOSTAT
- ENABLED