Furnace/Air Handler Interlock Wiring - Nu-Air NU0103 Operating, Maintaining & Installing

8.1

Furnace/Air Handler Interlock Wiring

NC
THERMOSTAT TERMINALS
I
Y
NO
R
C
TL
TS
SB
Hi
LO
STANDARD FURNACE INTERLOCK
Rev 2.3 July 17, 2017
R G W
W
G
R
C
Y
COOLING SYSTEM
NC
THERMOSTAT TERMINALS
I
Y
NO
R
C
TL
TS
SB
Hi
LO
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.
R G W
W
G
R
C
Y
COOLING SYSTEM
17