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SK2019 FSTD-SLIM-EC-FLEX-001_01
Control Specifications: Complete Function PCB – TOTAL Type Control
Abbreviations
Ts = Setting temperature
AUX1 = Hot water free contact
Tr = Room air temperature
AUX2 = Chilled water free contact
Ti1 = Chilled water coil temperature
MTV1 = Chilled water valve
Ti2 = Hot water coil temperature
MTV2 = Hot water valve
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.
Neutral
N1
Power supply to the PCB and all the loads connected to the voltage outputs.
Earth
PE1
Power supply to the PCB and all the loads connected to the voltage outputs.
Voltage
output
Fan 1
CN4
Fan 1 driver
Fan2
CN5
Fan 2 driver
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
PUMP
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 steeping motors. Voltage output (L)
Output
Auxiliary contact 2
AUX2
Cooling mode signal relay (NO). Voltage free contact.
Auxiliary contact 1
AUX1
Heating mode signal switch (NO). Voltage free contact.
Serial BUS port
CN3
Master-slave network serial connection OR
MODBUS / local PC host network serial connection.
24VAC power input
DA1
24VAC external power supply (modulating valve applications only).
Modulating valve 1
DA2
Connection to DC modulating valve
on 2-pipe coil circuit
- chilled / hot water.
Connection to DC modulating valve
on 4-pipe coil circuit
- chilled water.
Modulating valve 2
DA3
N/A
Connection to DC modulating valve
on 4-pipe coil circuit
- hot water.
