43 Fan Coil FC600 Instruction Manual
The S2/COM Terminal
The S2/COM terminal is used for connecting external sensors as occupancy or external temperature sensor. It
can operate in 3 different modes, depending on what is connected to the terminal
.
2 pipe
2 pipe
NoFn
No Function - nothing is connected to the S2/COM contact. No information is provided to
the thermostat.
Occupancy
sensor
Occupancy Sensor - occupancy sensor is connected, meaning that the thermostat can get
information depending on the input from this terminal and different rules can be created.
An example of an occupancy sensor is the hotel card - once the hotel card is inserted, the
thermostat can operate following a schedule it can go to ECO mode or STANDBY mode
(defined by d34 parameter). Occupancy sensor can be used in 2 pipe or 4 pipe applications.
External
Temperature
Sensor
External Temperature Sensor - External Temperature sensor is connected. Once the sensor
is connected, the thermostat will display on the LCD the temperature from that sensor,
ignoring the internal sensor. It can be used as an extension for the thermostat, saying you
have a thermostat operating a room that you don't have access to or is inconveniently
remote. Please note that if you don't have any sensor installed, but selected S2 as
external sensor, there will be no temperature to display, as there will be no source for the
thermostat to gain data from. Can be operable with any d2 value. The sensor should be
NTC 10kOhm.
Note:
The S2/COM terminal has the same usage for either 2 or 4 pipe configuration.
2 or 4 pipe
Sensor
1
2
4.5 Wall Mounting
