Page
54
of
73
SK2015
FSTDC
‐
V/P
‐
ECM
‐
001
E.
Control
Specifications:
SK
‐
NCPFWB
‐
002
‐
ECM
~W
Configuration:
Limited
function
PCB
Used
in
all
FSTD(C)
[V/P]
W
unit
configurations.
SK
‐
NCPFWB
‐
002
‐
ECM
is
used
for
FSTD(C)
with
electrical
heater.
E.1.
Features
a)
Condensate
management
with
valve
protection
and
NC
alarm
contact.
b)
Integrated
fan
relays
for
zone
control
applications.
c)
ON/OFF
thermostat
input
and
low
‐
voltage
modulating
fan
speed
input
flexibility.
d)
Simple
error
diagnostic
and
LED
error
display.
E.2.
I/O
Port
Definitions
I/O
Code
2
‐
Pipe
4
‐
Pipe
Analogue
input
Coil
temperature
sensor
AI1
Cooling
/
heating
coil
sensor
(Ti1)
Cooling
only
coil
sensor
(Ti1)
Voltage
input
High
fan
speed
H
230VAC
input
signals
from
wired
thermostat
Medium
fan
speed
M
Low
fan
speed
L
Phase
L
External
230VAC
power
supply
connection
to
the
PCB.
Max
length:
5
m.
Neutral
N
Earth
GND
Auto
ON/OFF
AUTO
230VAC
input
signal
from
wired
thermostat,
activates
modulating
control
mode
Signal
Input
Modulating
signal
+/
‐
Low
voltage
modulating
signal
input
(standard
0~5VDC;
optional
0~10VDC)
Digital
input
Programming
interface
TTL
Low
voltage
digital
signal
input
for
board
programming
Float
switch
Float
Voltage
‐
free
(NC)
Voltage
output
Water
pump
WP
Voltage
output
(L)
EC
motor
CN4
5
‐
wire
connection
with
230VAC
power
supply
to
EC
motor
and
0
‐
5VDC
modulating
signal
output
Stepping
motor
CN1
‐
2
Low
‐
voltage
output
Digital
output
LED
display
X
‐
DIS
Low
‐
voltage
output
Voltage
‐
free
output
Alarm
Voltage
‐
free
alarm
contact:
(a)
Standard
configuration
is
(NC).
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