ABB i-bus FCC/S 1 1 Series Product Manual page 143

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ABB i-bus KNX
Parameters
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7.4.1.2.1.2.7 Dependent Parameter
Actuate basic-stage cooling via
Options:
The control value is received via the bus and output directly on the selected output.
On the selection of the Group object option, the control value received is output directly again via
the bus without any processing in the device.
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7.4.1.2.1.2.8 Dependent Parameter
Switch relay output independently of fan speed (including when fan = 0)
This parameter is only visible if the Internal relay output has been selected for Actuate basic-stage
heating via.
Options:
This parameter is used to set whether switching of the relay output is to be allowed, independently
of whether the fan is running or not. The switching is undertaken via the dependent object Switch
relay group object.
NOTICE
Device damage due to large amount of heat
An electric heater can produce a large amount of heat. On the usage of the Switch relay group
object it is possible to switch on the electric heater without the fan running. Normally the fan is
used to blow heated air into the room. Without the fan running, there is a risk of overheating,
which may lead to damage to the building or the risk of a fire.
To prevent this situation from arising, suitable measures must be taken, e.g. temperature moni-
toring with mechanical shutdown.
If the device is in the cooling operating mode, even on the activation of this parameter it is not
possible to switch on the relay. This feature prevents simultaneous heating and cooling.
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7.4.1.2.1.2.8.1 Dependent Parameter
Automatic reset of manual relay overdrive to controller operation after
This parameter is only visible if the Yes option has been selected in the Switch relay output
independently of fan speed (including when fan = 0) parameter.
Options:
This parameter defines when switching of the relay outside the control is to be reset and controller
operation activated again.
For the time stated here the relay output can be overridden via the group object. Only after this
time has elapsed is the control value specified by the controller applied again for the relay.
A change in the operating mode from heating to cooling will always reset the relay manual override
to controller operation.
Internal output A (valve)
Internal output B (valve) (Not for FCC/S 1.4.1.1)
Group object
No
Yes
Note
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FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 143