Lennox SL280DFV Installation Instructions Manual page 27

SL280 Field Wiring Applications With Conventional Thermostat (Continued)
DIP Switch Settings and On−Board Links (figure 25)
DIP Switch 1
Thermostat
Thermostat
Heating
Stages
Dual Fuel
Single Stage OFF
Heat Pump
ComfortSense
7000 L7724U
thermostat w/
dual fuel capa-
bilities
Capable of 2
stage gas heat
control
Dual Fuel
OFF
Two Stage
Heat Pump
ComfortSense
7000 L7724U
thermostat w/
dual fuel capa-
bilities
Capable of 2
stage gas heat
control
* Connect W1 to W1 ONLY if using defrost tempering kit 67M41
NOTE − Do NOT make a wire connection between the room thermostat L terminal and the L terminal of the SL280
integrated control.
TABLE 13
On Board Links Must Be Cut To Select
System Options
CUT ON−BOARD LINK
W951
HEAT
PUMP
CUT ON−BOARD LINK
W915
2 STAGE
COMPR
CUT ON−BOARD LINK
W951
HEAT
PUMP
Page 27
Wiring Connections
FURNACE
HEAT PUMP
L7724U
TERM. STRIP
T'STAT
H
67M41*
L
Y2
D
B
Y2
T
T
L7724U
FURNACE
T'STAT
TERM. STRIP
H
67M41*
L
Y2
D
B
T
outdoor
sensor
T
L
Y
outdoor
sensor
HEAT PUMP
L
Y2
out blue