19
Figure 14. AHU Control Box Wiring Diagram
CN2
CN57
CN66
CN56
CN55
CN58
CN60
CN59
CN26
CN14
CN67
CN63
CN64
CN65
CN69
CN4
CN30
CN54
CN12
CN8
CN61
CN15
CN51
CN51_1
CN51_2
CN51_3
ENC1
ENC2
ENC3
ENC4
SW2 SW3 SW4 SW1 SW5
Capacity
Mid.
Low
High
Water
level
switch
Remove the short-wire
and connect to drainage
pump switch if the
drainage pump is
available.
T2B
T1/T0
T2
T2A
Display board
L1
L
L2
L2
COM
COM
T2A
T1/T0
T2B
T2
Li
Mi
Hi
Vo+ 0
0
Vi+
Ho
Mo
Lo
L1’
90-250V 60Hz
POWER IN
PUMP
CONTROL
OUTPUT
FAN
POWER
IN
FAN CONTROL
OUTPUT
Alarm
Output
FAN
CTON
HTON
AUXH
DEH
0-10V
Input
0-10V
Output
OPT
YL
Infrared
X
Y
12V
GND
HA
HB
P
Q
Water Sensor
M Smart
FAN CONTROL INPUT
Main board
CN62
“ +5V GND +12V ”
ONLY USED
FOR TESTING
ON/OFF
SWITCH
To Master/Slave EEVKit
Box comm.bus
To Outdoor/MS units
comm.bus
To Wire Controller
Power
To Wire Controller
comm.bus
Y
X
P
12V
GND
HA
HB
Q
Occupancy sensor
CN1
PWV(A)
PWV(B)
(2V Factory Default) (7V Factory Default)
(10V
Factory Default)
RL1
RL3
RL2
RED
WHITE
BLUE
BLACK
XS2
XS4
XS6
XS8
XS1
XS3
XS5
XS7
XS9
XS11
XP11
XP2
XP4
XP6
XP8
XP1
XP5
XP3
XP7
XP9
A2
A1
11
14
A2
A1
11 14
A2
A1
11
14
1. Refer to manual for communication wiring
2. Please use the 2-conductor shielded twisted
cable for communication
NOTE:
NOTE:
Component in dash line is optional or field wiring
Code
Name
PWV(A/B)
Eletrical Expansion valve
T1/T0
Return air temperature
T2B
T2A
T2
XS1-11
RL1-3
Jack
Evaporator outlet temperature sensor
Evaporator inlet temperature sensor
Middle of evaporator temperature sensor
XP1-11 Plug
Relay
XS10
XP10
( Current range: 0-1A)
Voltage range: 0-24V
Dial code
1
0
0.5
3
4
5
6
7
8
9
1
2
2
3
4
5 6
7
8
9
10
10
10
10 10
10
A
B
C
D
E F
Voltage (V)
Low speed
Mid. speed
High speed
ENC2
ENC3
ENC4
0-10V Output Voltage
ALT
AUX
Li
Mi
Hi
COM
NOTE - Typical wiring diagram. Refer to wiring diagram on the unit for actual wiring.
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