ECKELMANN UA 400 - Fan Control with Case and Cold-Room Controllers; Fan Control on Multidecks; Fan Control - Controller Type UA 131

Firmware V3.15
21.04.2021
52/401
•
•
5.5.8 Fan control with case and cold-room controllers
5.5.8.1 Fan control on multidecks
Controller type: only UA 111, UA 121, UA 111D
During cooling and defrost the fans run continuously and can be stopped for an adjustable period via the
parameter Laufzeit Rollo (only with external setpoint shift from setpoint data record 1 to setpoint data record 2
(not the reverse)). This is necessary to ensure trouble-free closing of the night blind (e.g. on Light OFF). The
fan relay is the normally closed (inverted) type:
when the controller turns on the fan, then the relay contact (73/74) is opened;
when the controller turns off the fan then the relay contact (73/74) is closed.
5.5.8.2 Fan control - Controller type UA 131
Controller type: UA 131
The functions for the fan control are activated via the DIP switch S3 on the controller circuit board, see chapter
Belegung der 230 V AC-Relaisausgänge. The terminal assignment, with the exception of the assignment of the
230 V relay outputs, is identical with the terminal assignment of the UA 131 (see chapter UA 400 installation
and start-up).
The fan relay operates inverted: - when the controller turns on the fan, then the relay contact (73/74) is opened;
- when the controller turns off the fan then the relay contact (73/74) is closed.
Parameterization of the fan control
The relevant parameters for the fan control are found in the operator menu of the case controller under menu
item 2 setpoints - 6 fan and can be used for the normal setpoint or the alternative setpoint.
Functional characteristics
The fan relay is switched on throughout the cooling. At the start of a defrost the fan relay switches off. During
the defrost the fan relay remains switched off. When the defrost is completed the fan relay switches back on in
the event of an undershooting of the Fan start parameter on the evaporator.
During single-zone operation only the evaporator sensor R1.1 is required to undershoot the Fan start value in
order for the fan relay to be switched on.
Duringtwo-zoneoperationboththeevaporatorsensorsR1.1andR1.3mustundershoottheFanstartvaluein
order for the fan relay to be switched back on. If the evaporator sensor R1.3 is not attached then the fan relay
will only be controlled via R1.1, even during two-zone operation. In order for the fan to remain switched on
duringcoolinganddefrosting(continuousoperation),theFanstartvaluemustbesetto"–".
Whenusingthefancontrolnodefrostingcanbecontrolledviatherelay73/74.
