ECKELMANN Case Controller UA 4 E Series - Refrigeration Point Disabling; E*Cop; Suction Pressure Shift

Firmware V3.13
21.04.2021
110/466
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5.16 Refrigeration point disabling
The case controller enables refrigeration points to be disabled by the pack controller (e.g. VS 3010) via the
CANbus.Coolingbythecasecontrollerisinterruptedaslongasrefrigerationpointdisablingisactive.
5.17 E*COP+
The auto-adaptive E*COP+ control process dynamically adjusts the suction pressure to the current cooling
power requirement. The algorithm evaluates the operating data of all controllers and determines the optimum
suction pressure over the respective requesting cooling units. The suction gas pressure p
0
and evaporation
temperature t
0
are dynamically increased as much as possible. The process uses the fact that less
compression work has to be performed in the case of an increase of p
0
and t
0
. Depending on the operating
status, increasing the evaporation temperature by 1 K can save approx. 3% energy. In the case of fluctuating
partial loads, E*COP+ always finds the ideal operating point and improves the COP (Coefficient of
Performance).
Parameters for E*COP+
This is the standard operating mode for suction pressure shifting. The operating mode is also suitable for mixed
operation of EEV and TEV controllers. Since all controllers participate in the suction pressure shift, all of them
(including the TEV controllers) must also be set to COPT+. In order for the EEV refrigeration controller (from
version >= V1.90) to be included in the control procedure, the following parameters must be set:
Menu 6-1: Refr. Sys. No.
Menu 6-2-7: OD over CAN set to OFF
Menu 6-2: COPT+ set to ON
Parameters for E*COP+ (compatibility mode with existing systems)
This operating mode serves to maintain compatibility with existing systems with UA 400 E / UA 410 E
controllers up to version V1.89. As soon as one of the controllers participating in E*COP+ uses this "older"
mode, all other controllers must also be set to this mode. Mixed operation of EEV/ TEV is then no longer
possible! In order for the EEV refrigeration controller to be included in the control procedure in compatibility
mode, the following parameters must be set:
Menu 6-1: Refr. Sys. No.
Menu 6-2-7: OD over CAN set to ON
Menu 6-2: COPT+ set to OFF
5.18 Suction pressure shift
Current valve opening degrees and case/superheat control status is transmitted by the case controller to the
pack controller via the CAN bus to enable suction pressure setpoint shift to be made on the pack controller
according to the actual refrigeration load. Transmission of the case controller valve opening degrees to the
pack controller can be switched on and off by the VO via CAN parameter (menu 6-2-7). (This can only be done
in Superuser mode). Thus it is possible for transmission of these positions to be disabled individually on any
case controller that is not to be included in suction pressure shift. The suction pressure setpoint on the pack
controller is shifted up or down according to the opening degree of the case/coldroom controllers concerned.
The action can be defined on the pack controller. Suction pressure setpoint is not shifted up when one of the
controllers concerned switches to superheat control and when temperature on the room/return air sensor is
greater than the room/return air setpoint + 2K. The suction pressure setpoint is accordingly not shifted up only
whenadisplaycaseisat”warm”temperatureandhasalsoswitchedtosuperheatcontrol.
A detailed description of the required settings and parameters can be found online on our E°EDP
documents platform at https://edp.eckelmann.de/edp/lds/_AzMqeNOO3W.
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