11
NO C NC I OC OL Y R G B
20-MINUTE
PUSH-BUTTON SWITCHES
(5 MAXIMUM)
A11214
Fig. 24 - Electrical connection to 20- minute lighted push button timer(s)
NOTE
: If an optional auxiliary control is activated and then, the
Dehumidistat (or Humidity Control) is being activated, the
Dehumidistat (or Humidity Control) will override the auxiliary
control commands.
Once the control(s) connections have been made, insert the
terminal connector on the recessed side of electrical compartment.
See Fig. 25.
Bottom of the unit
Terminal
connector
A11219
Fig. 25 - Terminal connector
NOTE
: For information about the operation of the wall controls,
refer to the user guide.
ELECTRICAL CONNECTION TO THE
FURNACE
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury
or death.
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
!
WARNING
For 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 ALTERNATE FURNACE
INTERLOCK WIRING. See Fig. 26.
W R G
Y
W
R
G
C
Y
UNIT TERMINAL CONNECTOR
THERMOSTAT
TERMINALS
FOUR
WIRES
TWO WIRES
heating only
FURNACE
24-VOLT
TERMINAL BLOCK
TWO WIRES
COOLING SYSTEM
N
O
C
N
C
I O
C
OL Y R G B
W
R
G
Y
W
R
Y
R
G
Y
C
THERMOSTAT
TERMINAL
4 WIRES
2 WIRES
heating only
wiring
nuts
FURNACE
24-VOLT
TERMINAL BLOCK
2 WIRES
COOLING SYSTEM
NO
NC
C
UNIT TERMINAL CONNECTOR
N
O
C
N
C
I OC
O
L Y R G B
Standard furnace interlock wiring
Alternate furnace interlock wiring
A11215
Fig. 26 - Electrical connection to furnace
