Fan Coil Actuator FCA 2
Updated: Feb-16 (subject to changes) Page
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5.4.4 Implementation:
A RAM 713 FC and an FCA 2 are used for room temperature control.
The RAM 713 FC calculates the setpoint based on the selected operating mode and a possibly
selected setpoint correction by the room occupants.
The operating mode is specified by a TR 648 top2 RC KNX time switch.
On work days, the time switch switches to
Standby
a little before work, and at the end of the
working time to night mode.
For this purpose, one channel of the time switch is connected with the operating mode object of
the controller.
A presence detector should activate
comfort mode
if the office is actually occupied.
For this purpose, the presence detector is connected with the presence object of the controller.
The room thermostat is connected to the FCA 2 via the
heating actuating value
and
cooling
actuating value
objects.
Via these objects, the FCA 2 controls the valves, and also the fan in
auto
position.
For a manual setting of the fan stages, objects 8 and 15 of the FCA 2 are connected with objects
16 and 17 of the RAM 713 FC.
The outside temperature is sent from a weather station to the FCA 2 (object 18) for adjustment of
the setpoint on hot summer days.
This determines, depending on the configuration, the setpoint correction transmitted to the room
thermostat.
For this, object 19 (FCA 2) and object 0 (RAM 713 FC) are connected with each other.
