ECKELMANN Case Controller UA 4 E Series - Frame and Pane Heater

Firmware V3.13
21.04.2021
107/466
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5.14 Frame and pane heater
General
The frame heater and the pane heater are used for heating window elements on the refrigerated cases to
prevent any misting of these elements due to condensation of water from the ambient air. Within the case
controller up to three operating modes can be selected for the frame/pane heating:
Fixed run time
Setpoint-dependent run time (only UA 131 E)
Enthalpy-dependentruntime
The control is performed via the transistor output 2 (terminals 91/92, see chapter Terminal assignment of the
24VDCtransistoroutputs).
Fixed run time:
A run time (0100%) must be parametrised in this operating mode. The specified run time is output by the case
controller over the entire operating time.
Setpoint-dependent run time (controller type UA 131 E)
There are no further parameters for this operating mode. Depending on the setpoint specified on the controller
inthefirstzone,aruntimeisdeterminedandoutputbythecasecontroller.
The following table is applicable for a supply air setpoint of
Supplyairsetpoint-32°Cheater=75%ON
Supply air setpoint < - 32 °C heater = 95% ON
Function of the transistor output for the frame heater (controller types UA 121 E, UA 131 E, UR 141 TE,
UR141NE)
The control is inverted (factory setting). The transistor output 2 (91/92, see chapter Terminal assignment of the
24VDCtransistoroutputs) outputs 0 V when the frame heater = ON. It supplies 24 V / 50 mA when the frame
heater is OFF. The function can be configured via the parameter Ausgang inver. (menu 2-5-2).
Function of the relay output for the pane heater (controller type UA 141 E)
The relay (73/74) is closed when the pane heater is ON (factory setting). It is open when the pane heater is
OFF. The function can be configured via the parameter Ausgang inver.(menu2-6-2).
The required operating mode must always be set first. Additional parameters dependent on the
operating mode are explained below. No frame or pane heater is provided for the UK 100 E sub cooler
controller or the KR 160 E cascade controller.
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