ECKELMANN Case Controller UA 4 E Series - Page 28

Firmware V3.13
21.04.2021
28/466
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Two-zone operation - only UA 400 E CC / UA 410 E AC
two temperature zones
2 pilot cases
In two-zone operation, the temperature and superheat are controlled separately for each refrigerated case. In
addition to the conventional end of defrosting, there is the possibility of returning the two refrigerated cases to
the cooling operation together after a defrost. The master/slave mode in two-zone operation must be activated
for this; see Defrosting in general. Only one evaporator sensor per evaporator is intended.
One-room.air-sensor operation - Controller type UR 141 NE, UR 141 TE - only UA 400 E CC / UA 410 E AC
Intwo-zoneoperation,theroomcontrollerscancontrolbothzonesviaonecommonroomairsensor.Inthis
operating mode, the room air sensor for the first zone (R4.1) is used for the room temperature control of both
zones. The superheat control of both zones continues to be performed independently. This operating mode is
suitable e.g. for the use of two independently controlled evaporators within one room.
In order to activate operation the following must apply
two-zone operation is set (menu 6-1) and
-thecoldroomtemperaturesetpointofthesecondzone(menu2-1-2)issetto“--“.
The alternative cold room temperature setpoint of the second zone (e.g. night-time value) has no
function in this operating mode.
If the transition to cooling should take place simultaneously for both zones after a defrost, the
master/slave mode must be activated for this case controller.
Theroomairsensorofthesecondzone(R4.2)isnotusedforregulationinthisoperatingmode;
nevertheless, if it is plugged in, temperature monitoring takes place for this sensor.
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