Lennox XC17 Series

Page 23
XC17
Y1
O
R
W1
G
D
R
Y1
L
C
C
Furnace Control
ComfortSense[ 7000 Thermostats
Catalog # Y0349 or Y2081
One−Stage
Air Conditioner Control
B
Y2
Y2
i−
W
O
i+
DS
L
T
T
W2
H
H
O
C
L
Y2
DS
DH
G
R
Y1
W2
W1
Cut on−board link (W914) (clippable wire) from DS to R for dehumidification (Optional).
1
2
3
On−board link
Low voltage thermostat
wiring
1. Thermostat T terminals are used for outdoor sensor input. Use for thermostat’s outdoor temperature display (optional).
2. R to L connection is required for this model when using the ComfortSense
®
7000 − catalog number Y0349 only. Resistor Kit (catalog number
47W97) required and ordered separately.
3. Cut on−board link (clippable wire) DS−R for Humiditrol
®
or Harmony IIIt applications. This will slow the indoor blower motor to the lowest speed
setting. See furnace installation instruction or engineering handbook for lowest fan speed information.
Figure 9. ComfortSense® 7000 Series Thermostat 
Furnace/One−Stage Air Conditioner