ABB i-bus FCC/S 1 1 Series Product Manual page 141

®
ABB i-bus KNX
Parameters
Dependent parameters:
• Type of heating/cooling system
• Heating/Cooling changeover
• Use 6-way valve
• Actuate basic-stage cooling via
On the selection of the Fan coil unit: Water cooling coil options, the fan follows the valve control
value for this stage if the automatic mode is active.
On the selection of the Free configuration option, this can also be set via a parameter.
—
7.4.1.2.1.2.3 Dependent Parameter
Type of heating/cooling system
This parameter is not visible if the Basic-stage heating or Basic-stage cooling parameters are de-
activated.
Options:
This parameter must be selected to suit the heating/cooling system in which the device is to be
used. It affects the changeover behavior of the device between heating and cooling.
• 2-pipe: This option is to be selected if the heating and cooling devices actuated are in a 2-pipe
system. In this system, only one pipe is used to supply the device with hot and cold water. It is
therefore only ever possible to heat or cool; a changeover is necessary to change. It follows
that the device is not allowed to decide on a change between heating and cooling and the
changeover must always be made via the bus. The Heating/Cooling changeover parameter is
correspondingly parameterized to Via object only and cannot be changed.
• 4-pipe: This option is to be selected if the devices actuated are in a 4-pipe system. In a 4-pipe
system, separate pipes are used for the hot and cold water supply. It is therefore possible to
change between heating and cooling at any time. In this situation the decision can be made
centrally, and also by the device. The Heating/Cooling changeover parameter is correspond-
ingly parameterized to Automatically.
—
7.4.1.2.1.2.4 Dependent Parameter
Heating/Cooling changeover
This parameter is set to Via object only and cannot be changed because a pure actuator device
cannot decide whether heating or cooling is required. This changeover must always be made via
the controller.
This parameter is only visible if the Basic-stage heating and Basic-stage cooling parameters are
activated.
Note
2-pipe
4-pipe
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 141