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18
LENNOX
!
This terminal must be connected to transformer common.
# Leave factory-installed jumper in place.
R
Wiring
terminal
function
Existing
thermostat
wiring
New
thermostat
wiring
COMMON
POWER
1
ST
STG.
HEAT (COMP)
1
ST
STG.
COOL
2
ND
STG.
HEAT
FAN
C/O VALVE
HEAT
C/O VALVE
COOL
SYSTEM
MONITOR
EM. HEAT
X
X
Y W2
1
E E
L
M W1
B
V/VR
Y1
2
F
G
R O
or
Y
BL
or
R
or
Y
R
O
BK
or
or
or