ABB i-bus FCC/S 1 1 Series Product Manual page 105

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ABB i-bus KNX
Parameters
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7.4.1.1.1.1.8 Dependent Parameter
Actuate additional-stage cooling via
This parameter is not visible if the Additional-stage cooling parameter is deactivated.
This parameter is not visible if the Actuator device option has been selected in the Device function
parameter.
Options:
The way the control value for the additional-stage cooling is to be output is set using this parame-
ter.
The parameter options are dependent on the values selected in theAdditional-stage heating,
Actuate basic-stage heating via, Actuate basic-stage cooling via and Actuate additional-stage
heating via parameters.
• Internal output A (valve); Internal output B (valve):
If one of the internal outputs is selected, the control value is output directly on this physical out-
put where it is converted into the corresponding output signal.
The outputs A and B are used to actuate valve drives.
In parallel to the actuation via the corresponding internal output, the control value is also output
via the related Status Control value Additional-stage cooling KNX group object.
4-pipe system (selection in the Type of heating/cooling system parameter: 4-pipe):
Depending on the selection in the Actuate basic-stage heating via, Basic-stage cooling and
Additional-stage heating parameters, it may not be possible to select all options. If one of the out-
puts has already been selected here, then it cannot also be used as an output for the basic-stage
cooling.
Example:
If the Internal output A (valve) option has been selected as the output for the basic-stage heating,
this cannot be selected as the output for the additional-stage cooling. Conversely, this statement
also applies on the selection of Internal output B (valve).
2-pipe system (selection in the Type of heating/cooling system parameter: 2-pipe):
In a 2-pipe system, heating and cooling are undertaken using the same device (e.g. fan coil unit).
Here it is possible that either the same valve is used for heating and cooling or that two valves
are used because the heat/cooling is output into the room via a dedicated heating/cooling coil.
For this reason it is therefore possible here to output the control values for heating and cooling on
the same output.
In parallel to the actuation via the corresponding internal output, the control value is also output
via the related Status Control value basic heating stage group object.
• Group object: If Group object has been selected as the option, there is no actuation via any of
the internal outputs, instead the control value is only output on the bus.
The control value is output via the related Status Control value Additional-stage cooling group
object.
The settings for the exact control parameters are made in the Temperature controller –
Additional-stage cooling parameter window.
The settings for the actuation of the control values via the valve outputs are made in the related
valve parameter window.
Internal output A (valve)
Internal output B (valve) (Not for FCC/S 1.4.1.1)
Group object
Note
Note
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 105