Rev 2.3 July 17, 2017
17
8.1
Furnace/Air Handler Interlock Wiring
NC
I
NO
R
C
TL
TS
SB
Hi
LO
U
N
IT
24 VA
C
RE
MOVA
BLE
T
ERMIN
AL
BLO
CK
THERMOSTAT TERMINALS
Y
R
G
W
W
G
R
C
Y
COOLING SYSTEM
FU
RN
AC
E
24 V
A
C
NC
I
NO
R
C
TL
TS
SB
Hi
LO
U
N
IT
24 VA
C
RE
MOVA
BLE
T
ERMIN
AL
BLO
CK
THERMOSTAT TERMINALS
Y
R
G
W
W
G
R
C
Y
COOLING SYSTEM
FU
RN
AC
E
24 V
A
C
STANDARD FURNACE INTERLOCK
ALTERNATE FURNACE INTERLOCK
If the standard interlocking method has the unwanted
effect of bringing on the AC, i.e. thermostats that do
not isolate “G” from “Y”, use the alternate method
shown above.
Summary of Contents for NU0103
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