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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
Power input
Power input
GND
LED input
Wired wall pad input
Analogue Input
External sensor(Ti1)
Occupancy contact
Digital input
Input common wire
Power input for outputs
High speed
Medium speed
Low speed
Motorized valve1
Motorized valve2
Auxiliary contact1
Digital output
Auxiliary contact2
EC fan or modulating valve
MV modulating valve
BUS ports
code
2-Pipe
L
24 VAC or 24 VDC
GND
TTL1
Wired wall pad
External sensor (Ti1)
AI1
The function is according to No16 setting.
Unit is ON. The switch is closed for 60S, the unit is OFF. It is turned ON again if
C1
the switch is opened for 10s.
Com
The power can be 230 VAC or 24 VAC. This is based on outputs signal
L1
requirement.
CN3
High speed- the power is based on L1 input.
CN4
Medium speed- the power is based on L1 input.
CN5
Low speed- the power is based on L1 input.
MTV1
Chilled and hot valve for 2-pipe unit
MTV2
No function
AUX1
Cooling mode signal relay (NO). Voltage free contact.
AUX2
Heating mode signal relay (NO). Voltage free contact.
0~10VDC signal for EC fan or Modulating valve according to No.19 setting
DA1
0~10VDC signal for modulating valve
DA2
CN8
Modbus
Page 59 of 71
4-Pipe
Chilled valve
Hot valve
SK2019 FSTD-SLIM-EC-FLEX-001_01
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