Page 69 - Advanced Course

KNX ADVANCED COURSE

Table 13: Fan coil model with one coil all speeds
Fan Actuator Output 1 Output 2 Output 3

OFF 0 0 0

Speed 1 1 0 0

Speed 2 1 1 0

Speed 3 1 1 1

3.2.2 Operating Modes
Fan coil controllers can be operated in different operating modes in the same way as
described for individual room control for the other variants. These modes include:

Comfort mode
Standby mode
Night reduction
Frost/heat protection

The toggling between the operating modes is implemented via communication objects. As
already seen in individual room control, a basic temperature can be set with an insensitive
zone between heating and cooling. Reference is also made to the temperature increase or
reduction.

3.2.3 Sensors
Sensors such as presence detectors, time switches, room thermostats, humidity sensors,
window contacts or sensors for condensed water as well as binary inputs which influence
the control can either communicate via KNX directly with the fan coil actuator via group
addresses or alternatively sensors can be connected directly to the actuator. This
depends on the respective device i.e. whether it is just an actuator or an integrated control
unit.

Home and Building Management Systems KNX Association
HVAC Control with KNX HVAC_E0813b.doc Page 43/60