Page
58
of
73
SK2015
FSTDC
‐
V/P
‐
ECM
‐
001
E.4.3.
Example
for
2
‐
pipe
PCU
with
EC
‐
mini
PCB
+
EC
Thermostat
+
Modulating
Valve
Medium speed
Remote Sensor
Input
Modbus
B
A
RS
INPUT
B
A
C
R
MF
HF
L
v+
-
24VAC
-
v+
R
230VAC/1Ph/50Hz
L
N
RE
LA
Y
RE
LA
Y
BL
D
C
EC
M
O
T
O
R
HV
Gnd
Vcc
Vsp
FG
FLOAT
float
c
ont
rol
s
w
itc
h
f
o
r p
u
m
p
RE
LA
Y
CPU
SM1
SM2
CN
2
AI1
NC
CN
4
X-DIS
TTL
L
M
H A
U
TO
N
+
-
-
+
0~10VDC(S
1
closed)
V
1
V
2
L
o
M
H
N
L N
BL
YL
BR
OR
L
N
L1 phase to thermastat
customer care
N common to thermastat
customer care
230V~50HZ
Auto speed signal
230V~50HZ
CN1
ALARM
GY
RD
GR
S1
L1
N1
N2
PUMP
BL
RD
WH
BR
OR
BK
B
L
YL/GR
RD
RD
OR
BR
YL
B
L
BL
BK
BL
BL
BL
M
High speed
24VAC modulating valve
2-PIPE thermostate SK-DFPS-E-1.3a
2-PIPE FAN COIL UNIT WITH EC MINI PCB
2-PIPE FCU with ec-mini PCB + EC therModulating Valve
Auto
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