Page
27
of
73
SK2015
FSTDC
‐
V/P
‐
ECM
‐
001
C.
Control
Specifications:
SK
‐
NCPFWB
‐
001
‐
ECM
~S
Configuration:
Full
Control
PCB
Abbreviations
Ts
=
Setting
temperature
Tr
=
Room
air
temperature
Ti1
=
Chilled
water
coil
temperature
Ti2
=
Hot
water
coil
temperature
AUX1
=
Hot
water
free
contact
AUX2
=
Chilled
water
free
contact
MTV1
=
Chilled
water
valve
MTV2
=
Hot
water
valve
C.1.
I/O
Port
Definitions
I/O
Code
2
‐
Pipe
4
‐
Pipe
Analogue
Input
Return
air
sensor
AI1
Return
air
temperature
(Tr)
2
‐
pipe
coil
circuit
sensor
AI2
Chilled
/
hot
water
coil
circuit
(Ti1)
Chilled
water
coil
circuit
(Ti1)
Hot
water
Sensor
AI3
N/A
Hot
water
coil
circuit
(Ti2)
Input
LED
display
/
IR
receiver
X
‐
DIS
1
Digital
communication
port
to
LED
display
/
IR
receiver
board.
Wired
wall
pad
TTL1
Digital
communication
port
to
wired
wall
‐
pad
board.
Digital
input
Occupancy
contact
ON/OFF
Window
contacts:
for
remote
ON/OFF
(when
DIPB
SW1=1).
Economy
mode
contacts:
for
remote
activation
of
economy
mode
(when
DIPB
SW1=0).
Float
switch
Float
Voltage
‐
free
(NC)
Electrical
heater
safety
switch
EH
Voltage
‐
free
(NC).
The
contact
is
closed
before
the
EH
is
turned
on.
Power
input
Phase
L1
Power
supply
to
the
PCB
and
all
the
loads
connected
to
the
voltage
outputs.
Max
length:
5
m.
Neutral
N1
Power
supply
to
the
PCB
and
all
the
loads
connected
to
the
voltage
outputs.
Max
length:
5
m.
Earth
PE1
Power
supply
to
the
PCB
and
all
the
loads
connected
to
the
voltage
outputs.
Max
length:
5
m.
Voltage
output
Fan
1
CN4
Fan
1
driver
Fan2
CN5
Fan
2
driver
and
motor
connection
port.
Valve1
MTV1
2
‐
pipe
coil
circuit
valve
output
–
chilled
/
hot
water
valve.
Voltage
output
(L)
4
‐
pipe
coil
circuit
valve
output
–
chilled
water
valve.
Voltage
output
(L)
Valve2
MTV2
Reserved
4
‐
pipe
coil
circuit
valve
output
–
hot
water
valve.
Voltage
output
(L)
Water
pump
WP
Power
supply
to
condensate
pump
Voltage
output
(L)
Voltage
of
electrical
heater
(Live)
L
‐
EH
Voltage
output
(L),
maximum
30A
[See
wiring
diagram,
cross
check
with
supplier].
Stepping
motor
CN1
‐
2
Power
supply
to
louver
stepping
motors
Voltage
output
(L)
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