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SK2018 PCG(H)-V/P-AECM-001
F.4.2.
AECM-W1 unit with AC/EC thermostat wiring diagram
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
LY
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
co
nt
ro
l s
w
itc
h
f
o
r
p
um
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
2 pipe sensor (Ti1)
MOTOR1
MOTOR2
MOTOR4
BL
GY
WH
OR
BR
YL
BL
BK
CN4
NC
com
NO
0~10Vdc from thermostat
RLY3
EH 2.5mm2
EH 2.5mm2
EH 2.5mm2
T
em
p.
sw
itc
h1
, 2
NA-AEC-W1 unit with 2-modulating valves and ECM running at setting speed
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
EH or heating valve signal (230Vac)
High speed signal (230Vac)
Med speed signal (230Vac)
Cooling valve signal (230Vac)
L
1
D
A
1
V
1
A
1
A
2
H
i
L
o
D
A2
M
e
V
2
S
1
C
1
A
B
L
1
V
1
H
i
L
o
M
e
V
2
24Vac
~
Legend:
L1: Hi,M,L, V1, V2 power supply;
Hi: High speed contact;
Med: Medium speed contact;
Lo: Low speed contact;
V1: Cooling valve contact;
V2: Heating valve contact;
S1: Remote on/off contact;
C1: COM
A1: Cooling status signal contact;
A2: Heating status signal contact;
DA1: 0~10Vdc signal
DA2: 0~10Vdc signal
A/B: RS485 port
AC/EC-S4 Thermostat Wiring scheme
R
t
MV2
MV1
}
230Vac 50Hz
Main power supply
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
LY
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
at
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
2 pipe sensor (Ti1)
MOTOR1
MOTOR2
MOTOR4
BL
GY
WH
OR
BR
YL
BL
BK
CN4
NC
com
NO
0~10Vdc from thermostat
RLY3
EH 2.5mm2
EH 2.5mm2
EH 2.5mm2
T
em
p.
sw
itc
h1
, 2
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
EH or heating valve signal (24Vac)
High speed signal (24Vac)
Med speed signal (24Vac)
Cooling valve signal (24Vac)
L
1
D
A
1
V
1
A
1
A
2
H
i
L
o
D
A2
M
e
V
2
S
1
C
1
A
B
L
1
V
1
H
i
L
o
M
e
V
2
24Vac
~
Legend:
L1: Hi,M,L, V1, V2 power supply;
Hi: High speed contact;
Med: Medium speed contact;
Lo: Low speed contact;
V1: Cooling valve contact;
V2: Heating valve contact;
S1: Remote on/off contact;
C1: COM
A1: Cooling status signal contact;
A2: Heating status signal contact;
DA1: 0~10Vdc signal
DA2: 0~10Vdc signal
A/B: RS485 port
AC/EC-S4 Thermostat Wiring scheme
R
t
MV1
}
230Vac 50Hz
Main power supply
NA-AEC-W1 2-pipe unit with modulating valve and adjusting air flow
Lo speed signal (24Vac)