ECKELMANN Case Controller UA 4 E Series, Инструкция по эксплуатации

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Firmware V3.13 21.04.2021 58/466
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5.7.11 Regulation according to tc / high pressure
Only UA 410 E AC and only controller type UK 100 E or KR 160 E
With the controller type UK 100 E or the controller type KR 160 E, control can be performed both via the
subcooler outlet temperature / cascade outlet temperature as well as via t
c
. The following settings must be
made for the regulation via t
c
:
In menu 6-1, the pack number must be set to the pack controller for the control circuit which provides the
refrigeration. For example, in cascade controller operation this is the NT control circuit.
In menu 6-2-6, the second analogue input must be parametrised. The associated parameters must be set
as follows:
Set AIN2 aktiv to "Yes"
Select Kältem.Z 2
Fkt. AIN2 must be set to "tc TK"
The limits for the pressure transmitter must be set via the parameters HD Z2 Min and HD Z2 Max
Optional: Using the parameter “Verb. tc TK”, the CAN bus address of the pack controller can be
parametrised for the reception of tc via the CAN bus (e.g. as backup value (fallback) in the event of
the failure of the local pressure transmitter or for saving on the local pressure transmitter).
The value of the pressure transmitter connected to the analogue input AIN2 (terminals 11/14) is preferred for
the regulation. If this has been disabled or fails, the tc received from a “remote case controller” is used if
possible (see chapter Sending and receiving of analogue values via CAN bus ). If this is not available, the tc
transmitted from the pack controller via CAN bus is used at the lowest fallback level. If this is also not available,
the sensors R4.1 / R4.2 (subcooler / cascade outlet temperatures 1/2) are used for the regulation.
If the transcritical range is exceeded during the measurement of tc with the refrigerant R744 (C02), the
temperature continues to be converted, however it no longer corresponds to the pressure.
There is no built-in limitation at 31 °C in this version. There is currently also no pressure recorded or displayed
regarding t
0
/t
c
but only the temperatures.
This function is not supported by older pack controllers. Therefore, it must be clarified before use
whether the associated pack controller also supports this function. A firmware update may have to be
performed for the pack controller.
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