Page 72 of 83
SK2018 PCG(H)-V/P-AECM-001
F.4.
Wiring Diagrams
F.4.1.
Standard W Control PCB
AI1: Indoor coil sensor(TI1)
AI2 0~10VDC ,EC Motor control signal.
X-DIS: Led display
TTL: Wired wallpad, used to set motor rpm.
Legend:
ALARM: Pump failure, it's opened.
PUMP: Water pump output
CN1,CN2: Stepping motor
CN4: EC motor output
BK
IC
BG1
X
-D
IS
AI1
TTL
CN1
C
N
2
HV
EH
Relay
P
U
M
P
F
L
O
A
T
-A
F
L
O
A
T
-B
R
L
Y
1
ALARM
FUSE1
RLY2
EMI1
EMI2
PE
N2
N1
L1
AI2
DI
+ -
S4
S3
S1
PROG1
EH L M H AUTO COM
MOTOR3
Y
1
W
1
G
0
G
1
G
2
C
R
R
D
R
D
flo
a
t c
o
n
tr
o
l s
w
itc
h
f
o
r
p
u
m
p
B
L
B
K
G
Y
JP3
JP4
JP1
B
L
B
L
R
D
W
H
B
R
O
R
EC moter
PUMP
W
H
JP2
JP6
JP7,8
B
L
R
D
W
H
B
R
O
R
EH or heating valve signal (24Vac)
High speed signal (24Vac)
Med speed signal (24Vac)
Low speed signal (24Vac)
COM
24VAC
2 pipe sensor (Ti1)
MOTOR1
MOTOR2
MOTOR4
NA-AEC-W1 unit wiring scheme
AEC-W1-2018
BL
GY
WH
OR
BR
YL
RD
CN4
NC
com
NO
Cooling valve signal (24Vac)
115Vac 60Hz
Main power supply
0~10Vdc from thermostat
RLY3
EH 2.5mm2
EH 2.5mm2
EH 2.5mm2
T
em
p
. s
w
itc
h
1,
2
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