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Building Technologies
Basic documentation: Communication via the KNX bus
CE1P3127en
HVAC Products
Appendix
30.08.2007
Control strategy
Room control
combination
Effect
•
Same room
operating mode
•
Shared setpoints
Slave external
setpoint
The slave ventilation controller shares
the same setpoint as the master:
Comfort heating setpoint
PreComfort heating setpoint
Economy heating setpoint
The setpoints cannot be set in the
slave ventilation controllers. Any
setpoint adjustments required must be
made in the master ventilation
controller.
•
Same room
operating mode
•
Individual
setpoints
Slave internal
setpoint
The slave ventilation controller
operates with its own setpoints.
Room with underfloor heating and ventilation
Another application of the "Room control combination" is a room with underfloor
heating and a ventilation system. Exchanging the relevant process values over the
KNX bus enables a common control strategy to be applied, with the following aims:
•
Optimum control, heating or cooling
•
The same room operating mode for both controllers
(time switch and holiday/special day program, manual override)
•
Automatic changeover of ventilation control
(Winter:
Constant supply air temperature control, own setpoints)
(Summer:
Room/supply air cascade control)
M
M
T
∆
p
∆
p
T
M
M
∆
p
T
T
T
M
31
27
S
0
2
2
2
Control strategy
Application example 3
