18-AC74D1-4
15
Red
Yellow
Green
White
Blue
Yellow
Green
White
Blue
B
B - Blue
Blue
W
G
Y
Y - Yellow
Yellow
R
Red
O
Orange
Comfort Control
Air Handler
Field wiring
O **
R **
B
YI (In)
W1
YO (Out)
G
W2
W3
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Air Conditioner
GAM5 Air Handler
Hook-up Diagram
* For multiple stages of
1.
electric heat, jumper W1,
W2, and W3 together if
comfort control has only
one stage of heat.
** R to
2.
O jumper must
be in place as shown for
cooling only, non-heat
pump systems for proper
operation.
Yi and Yo connections
3.
must be made as shown
for freeze protection and
internally mounted con-
densate overflow circuits
to work properly.
Internally mounted con-
4.
densate switch is optional
and must be ordered
separately.
If 3rd party condensate
5.
overflow switches are
installed, they should be
wired in series between
YO and Y to the outdoor
unit.
Comfort Control
Air Handler
Air Conditioner
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Field wiring
Yellow
Blue
Red
Yellow
Green
White
Blue
B
B - Blue
W
G
Y1
Y2
Y1 - Yellow
R
O
O
R
B
YI
W1
YO
Y2
DH/BK
G
W2
W3
(In)
(Out)
*AM7 Air Handler
Hook-up Diagram
1
1
1
2
3
4
5
1
2
3
4
5
HP
2 (Compressor)
2 (Stages)
AC (System)
}
OUTDOOR
Capacity (Tons)
OUTDOOR
}
Torque
CFM/Ton
Cool Off Delay
}
INDOOR
CFM
+12V
R13
R14
R1
R4
1
U1
R NET 1
S1
on
on
S2
R NET 2
R
6
C
22
C
19
C
15
C
12
C
18
C
21
C10
D9
L1
R22
Must configure to
“ON” for AC Units.
Must configure to “OFF” for
single-stage compressors.
Control Board
