Page
49
of 71
SK2019 FSTD-SLIM-EC-FLEX-001_01
Wiring Diagrams
Standard EC-FLEXI Type 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
FL
O
AT
-A
FL
O
AT
-B
R
LY
1
ALARM
FUSE1
RLY2
EMI1
EMI2
PE
N2
N1
L1
AI2
DI
S4
S3
+
-
S1
PROG1
L M H EH COM
MOTOR3
V
1
V
2
L
o
M
ed
.
H
i
N
1
R
D
R
D
flo
at
c
on
tro
l s
w
itc
h
fo
r p
um
p
BL
BK
G
Y
JP3
JP4
JP1
BL
BL RD
W
H
B
R
O
R
EC moter
PUMP
W
H
JP2
JP6
JP7,8
BL RD
W
H
B
R
O
R
EH or heating valve signal (230Vac)
High speed signal (230Vac)
Med speed signal (230Vac)
Low speed signal (230Vac)
2 pipe sensor (Ti1)
MOTOR1
MOTOR2
MOTOR4
EC-W1B unit wiring scheme
IPA19-DL-EC-W1B
BL
GY
WH
OR
BR
YL
CN4
NC
com
NO
Cooling valve signal (230Vac)
230Vac 1Ph
Main power supply
0~10Vdc from thermostat
RLY3
EH 2.5mm2
EH 2.5mm2
EH 2.5mm2
Tem
p.
sw
itc
h1,
2
C
R
1
R
BL
12VAC for thermostat
COM
24VAC for thermostat
E
H
G
ND3