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SK2019 FSTD-SLIM-EC-FLEX-001_01
No16 stands for temperature sensor setting:
0=inner and external sensor are used. Inner sensor is to show room temperature. External sensor is used to show
water inlet temperature.
1=External sensor is connected, room temperature is based on external sensor. External sensor is not connected, room
temperature is based on inner sensor
No17 stands for unit configuration setting:
0=2-pipe
1=4-pipe
2=2pipe unit + floor heating
No18 stands for fan control setting:
0=DA, In cooling mode, fan is still on when setting temperature is reached.
1=DB, In heating mode, fan is off when setting temperature is reached.
No19 stands for DA1 setting:
0=EC fan control signal
1=Modulating valve control signal
I/O table
I/O
code
2-Pipe
4-Pipe
Power input
Power input
L
24 VAC or 24 VDC
GND
GND
LED input
Wired wall pad input
TTL1
Wired wall pad
Analogue Input
External sensor(Ti1)
AI1
External sensor (Ti1)
The function is according to No16 setting.
Digital input
Occupancy contact
C1
Unit is ON. The switch is closed for 60S, the unit is OFF. It is turned ON again if
the switch is opened for 10s.
Input common wire
Com
Power input for outputs
L1
The power can be 230 VAC or 24 VAC. This is based on outputs signal
requirement.
Digital output
High speed
CN3
High speed- the power is based on L1 input.
Medium speed
CN4
Medium speed- the power is based on L1 input.
Low speed
CN5
Low speed- the power is based on L1 input.
Motorized valve1
MTV1
Chilled and hot valve for 2-pipe unit
Chilled valve
Motorized valve2
MTV2
No function
Hot valve
Auxiliary contact1
AUX1
Cooling mode signal relay (NO). Voltage free contact.
Auxiliary contact2
AUX2
Heating mode signal relay (NO). Voltage free contact.
EC fan or modulating valve
DA1
0~10VDC signal for EC fan or Modulating valve according to No.19 setting
MV modulating valve
DA2
0~10VDC signal for modulating valve
BUS ports
CN8
Modbus
