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4. CONTROLS (
CONT
4.2 E
C
LECTRICAL
ONNECTION TO
4.2.3 E
C
LECTRICAL
ONNECTION TO
NO C NC I OC OL Y R G B
Y
G B
VE0328A
4.2.5 E
C
LECTRICAL
ONNECTION TO
NOTE: If an auxiliary wall control is first activated,
and
the
Dehumidistat
afterwards, the operation of the latter will
override the operation of the first.
5. ELECTRIC CONNECTION TO THE FURNACE
Never connect a 120-volt AC circuit to the terminals of the furnace interlock (standard wiring). Only use the low
voltage class 2 circuit of the furnace blower control.
F
OR A FURNACE CONNECTED TO A COOLING SYSTEM
On some older thermostats, energizing the "R" and "G" terminals at the furnace has the effect of energizing "Y" at the thermostat and
thereby turning on the cooling system. If you identify this type of thermostat, you must use the
STANDARD FURNACE INTERLOCK WIRING
W
R
G
FOUR
WIRES
TWO WIRES
heating only
W
R
G
C
Y
FURNACE
24-VOLT
TERMINAL BLOCK
VE0108A
'
)
D
O
W
C
PTIONAL
ALL
VT4W M
W
C
AIN
ALL
MAIN WALL CONTROL
VT4W
REAR VIEW
Y
G
B
O
A
W
PTIONAL
UXILIARY
NO C NC I OC OL Y R G B
is
activated
VE0371
:
THERMOSTAT
Y
TERMINALS
TWO WIRES
COOLING SYSTEM
(
'
)
ONTROL
CONT
D
4.2.4 E
ONTROL
LECTRICAL
NO C NC I OC OL Y R G B
VE0187
C
ALL
ONTROLS
!
WARNING
4 WIRES
2 WIRES
heating only
W
R
R
G
C
Y
Y
FURNACE
24-VOLT
TERMINAL BLOCK
15
C
VT6W M
ONNECTION TO
ALTERNATE FURNACE INTERLOCK WIRING
ALTERNATE FURNACE INTERLOCK WIRING
THERMOSTAT
W
R
G
Y
TERMINAL
wiring
nuts
NO
NC
C
2 WIRES
W
C
AIN
ALL
ONTROL
.
COOLING SYSTEM
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