Art. No. ..5192KRMTSD
Art. No. ..5194KRMTSD
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The parameter "Start-up via level" is not checked for plausibility in the ETS, meaning that
an incorrect configuration is possible. For this reason, care should be taken to ensure that
there is no switch-on level in the configuration which is higher than the actual fan levels.
The fan controller automatically corrects a faulty parameterisation by activating level 1 for
the start-up, meaning that the fan starts up normally without a switch-on level.
Fan level limit
To reduce the fan noise of a fan coil, the fan level limit can be activated. The level limit reduces
the sound emissions by limiting the maximum fan level to a fan level value specified in the ETS
by the "Level limit" parameter (limit level). The limitation can be switched on and off via a
1-bit "Fan, level limit" object, and thus activated in accordance with requirements, for example
via a timer during night-time hours in order to reduce noise in bedrooms, or via "manual"
operation of a pushbutton when a "quiet room" is needed (auditorium or the like). The limitation
of the fan level is activated by receipt of a "1" telegram via the object "Fan, level limitation".
Deactivation is therefore achieved through the receipt of a "0" telegram.
While a limitation is active, the fan controller prevents the fan from being switched to a higher
level than the limitation level. If, at the instant that the limit is activated, the fan is running at a
level that is greater than the limit level, then the fan level is immediately reduced to the limitation
value. In this case the switching sequence of the individual levels and the waiting time
configured in the ETS are also taken into account in the level change-over.
The limitation level can be one of the available fan levels.
The level controller distinguishes between Automatic and Manual operation.
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The fan level limit overdrives the switch-on level. As a result, when the fan is switched on, if
the limit is active, the level has an active limit and the switch-on limit is not started. In this
case, the limit level is jumped to without waiting.
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The level limit has no effect with an activated fan forced position.
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The parameter "Level limit" is not checked for plausibility, meaning that an incorrect
configuration is possible. For this reason, care should be taken to ensure that there is no
limit level in the configuration which is higher than the actual fan levels. If a higher limit level
is configured, then the limit has no effect.
Forced fan position
The controller provides the option of activating a forced fan position via the bus. With an active
forced position, the fan levels can neither be controlled nor switched over in either automatic or
manual mode. The fan remains in the forced state until the forced position is removed using the
bus. In this manner, it is possible to switch the fan to a locked and controlled state, for example
for servicing purposes.
As soon as a "1" telegram is received via the 1-bit object "Ventilation, forced position", the
controller immediately sets the fan level configured in the ETS without delay. The fan can also
be completely switched off. The only special feature when activating the forced position is the
fact that the fan controller is in automatic operation and a waiting time elapses, due to a
previous level change-over. In this case, the fan controller only switches to the forced position
level without the waiting time elapsing.
The forced position is dominant. For this reason, if connect be overdriven from automatic mode,
manual mode, the level limit or fan protection. Only when the forced position is removed does
the fan control begin to control the fan levels according to the active operating mode.
The removal takes place when a "0" telegram is received via the
object "Ventilation, forced position". The fan always switches itself off first. In automatic
operation, the controller then evaluates the active command value and, when the waiting time
configured in the ETS has elapsed, switches to the required fan level, taking an optionally-
configured switch-on level into account. In manual operation, the fan first remains switched off.
The fan level is only raised when the manual control button is pressed again. If a switch-on level
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Software "Room controller display compact module 146x11"
Functional description
