ECKELMANN UA 400 - System Design of UA 400; Application

Firmware V3.15
21.04.2021
15/401
•
•
3 System Design of UA 400
Figure: UA 400 AC - full configuration
3.1 Application
The UA 400 case controller for thermostatic expansion valves (TEV), is suitable for the control and monitoring
of up to two temperature zones in refrigerated display cases and cold rooms for normal cooling and low
temperature refrigeration (NT/LT).
The appropriate application for refrigerated shelves, refrigerated display cases, island freezers and freezer
rooms can be simply set using the DIP switches on the controller. Factory settings for the desired application,
tired and tested in praxis, are then loaded.
The use of the case controller for electronic expansion valves offers decisive advantages thanks to a reduced
pressure difference between the high and low pressure sides, lower superheat at the evaporator as well as
constant conditions for the goods and evaporator thanks to continual regulation. The adaptive suction pressure
control generates further savings potential thanks to the load independent increase in suction pressure.
A range of functions for cost and energy saving such as defrost on demand, latent heat utilisation, intelligent fan
control, enthalpy controlled frame heating and the constant temperature control of the goods are available with
this case controller.
In order to fully utilise its performance features the controller is typically connected to the CAN bus, through
which it communicates with further control and monitoring components across the entire network.
Via the CAN bus an intelligent data exchange is carried out with the following system components:
System Centre / Store computer: Archiving of the operating data as well as alarm and message
management, Connection to LDSWin for analysis, configuration and evaluation
Pack controller: Data exchange between the E*LDS components, Consumer lock (emergency function in
the event of pack failure)
ABT300xOperatorInterfaceandonetofourBT30TemperatureDisplayscanbeconnectedtothecontroller
when required. Electrical connections are described in Section Pin and Terminal Assignments of UA 400.