Salus FC600 Instruction Manual page 42

The S1/COM Terminal
The S1/COM terminal responds for the heat/cool changeover. It can operate in 4 different modes, depending
on what is connected to the terminal.
2 or 4 pipe
S1/COM
No Function, means that there is nothing connected to the terminal and that the Heating/
Cooling mode will be changed manually by the user when operating the Fan Coil via device or
the App. Heating/Cooling mode cannot be
NoFn
changed via changeover sensor / switch; it will remain in the last mode as selected locally via
button or App.
Heat/Cool Changeover via External Switch - an external Switch is connected to the
thermostat and depending on its position the end user can control the Heating/Cooling
modes on the thermostat. When the switch is open the thermostat enters Heating Mode, when
HCCO
closed - Cooling Mode. The primary usage for this setting is when you have a thermostat in
one room, but wish to operate its mode from a different location (for example you have several
thermostats in different rooms and the Heat/Cool switch placed in the boiler room).
Auto Heat/Cool changeover via Pipe
Sensor. An external pipe temperature
sensor is connected to the S1/COM terminal.
The temperature detected by the pipe
sensor (i.e the water temperature inside the
pipe )is used to change over from heating to
cooling mode, or vice versa. When the pipe
temperature is above e.g. 30 °C(parameter
d25), the thermostat changes over to
heating mode; and to cooling mode when
below e.g.10°C (parameter d24). If the pipe
temperature is between the 2 changeover
points after power-up, the thermostat
Auto
starts in the previous active mode. The
pipe temperature is acquired at 30-second
intervals and the operating state is updated
accordingly.
Note: The temperature detected by the pipe
sensor is NOT the temperature displayed
on your LCD. The screen of the thermostat
displays the room temperature, detected
by the internal temperature sensor. The
information regarding the pipe temperature
is used by the thermostat to ONLY switch
between Cooling/Heating Mode and turn
On/Off the fan, if selected.
An external pipe sensor is connected to the
S1/COM terminal, that tells the fan to run or
not. The type of sensor connected to the S1/
Sens
COM terminal need to be NTC 10kOhm.
42 Fan Coil FC600 Instruction Manual
2 pipe 4 pipe
Auto Heat/Cool changeover via "dead zone"
function. For a 4 pipe configuration there
CANNOT be an external pipe sensor connected.
The thermostat controls 2 valves in Heating
and Cooling Mode. Terminal V1 is used for the
Heating valve, while terminal V2 is used for
the Cooling valve. The Heating/Cooling mode
changeover temperature is the one detected
by the internal temperature sensor.
N/A