Johnson Controls MAHP18B21S - Figure 39. Connection to Fan Motor Inside Air Handler

PMGB0406B rev.1
64
• Make sure that the wiring does not touch sharp edges.
• Otherwise, the wiring may be damaged and serious accident and malfunction of the air handler may
result.
• Do not connect the fan motor wiring from TB1-#2 to fan motor run capacitor for air handler model AP60.
Otherwise, serious accident and malfunction of the air handler may result.
There are three wiring from the control box for the fan motor.
• Wiring from "X2" terminal on PCB2 connects to "HI" terminal of fan motor.
• Wiring from "X4" terminal on PCB2 connects to "MED" terminal of fan motor.
• Wiring from TB1-#2 must be connected as shown above and depends on corresponding air handler model.
(Connection is different for air handler model AP60)
(1) Pass the fan motor wiring through the conduit hole for the fan motor wiring on the DX-Kit control box. (When
connecting the fan motor wiring from outside the control box, run through the conduit tube.)
(2) Route the three wirings for the fan motor inside the air handler by passing through the connecting hole on
the left side of the air handler.
(3) Use the cable holder to secure excess wiring.
Figure 39. Connection to Fan Motor Inside Air Handler
Fan Casing
Fan Motor Run Capacitor
Fan Motor Terminals
Control Box Cover
Ø
7
/ 8 inch(22.2mm)
Conduit Hole for
Fan Motor Wiring
Control Box
PCB2 PCB1
Use either wiring holes
o
f air handler for routing
t
he fan motor wiring inside
t
he air handler
R
X2
X4
To MED Terminal of Fan Motor
(From X4 on PCB2)
Conduit for Fan Motor Wiring
To HI Terminal of Fan Motor
(From X2 on PCB2)
Fan Motor Wiring
(Accessory)
HI
MED
LO
(Connection is di rent for AP60)
HI Terminal (To X2 on PCB2)
MED Terminal(To X4 on PCB2)
Enlarged View of Fan Motor inside
HI
MED
LO
X2
YX2
X3
YX5 YX4 YX3
P*****
CN402
CN403
CN404
CN401
X4X5
R
121175 8
10
921 3
6
4
321
4
321
32
6
541
32
6
541
4
321
21
PCN6
PCN7
PCN3PCN2
YH2
C4
R
3
PC
4
Z2
DSA
SSR1
R
8
R
6
R
2
R
4
PC
2
PC3
C35
ZD2
HA
CN8
CN7
C3
C8
C2
REG3
LED4
LED3
L2
DM2
N
THM5THM4THM3THM2
CN2
CN4
CN3
TP
L4
L3
EF4
Z3
Z4
FUNC
ZD1
C11
HIC1
DM1
CN11
CN17
LED1
C12
CN1
D12
D11 D10
DSW7
DSW3
DSW4
DSW5
DSW6
RSW1
RSW2
DSW8
R
1
THM1
L1
PCN1
EFR1
EFS1
C1
Z1
CN1925
CN14
PC1
C15
EF
1
R12 R13
REG1
REG2
0
1
9
8
7
6
5
4
3
2
5
4
3
2
1
0
9
8
7
6
1
Fl
oat Sw
.
2 3 4 5 6 7 8 9 1110 12
EXP.VALVE
1 2 3 4 - 6
CONTRO
L
1 2 A B 1 2
L1 L2
1 2 3 4
PS Drain Pump
L1 L2
4321
(Ins)DX-Kit4e-rev1.indd64
(Ins)DX-Kit4e-rev1.indd64
2016/11/2515:33:03
2016/11/2515:33:03