ECKELMANN Case Controller UA 4 E Series - Heating Circuit Control

Firmware V3.13
21.04.2021
64/466
5.7.18 Heating circuit control
Only UA 400 E CC / UA 410 E AC and only UR 141 NE / UR 141 TE
As an alternative to the second temperature zone, the temperature can be controlled in cold rooms with a
supplementaryheatingcircuit.Heatingcircuitcontrolisplainon-offcontrol.Theheatingcircuitcontrolrelaycuts
outwhentemperaturerisestoavalueequaltothesetpointplushysteresis.Therelaycutsinwhen
temperaturedropsbelowthesetpoint.Therelaywithterminals33/34isusedforheatingcircuitcontrol.
Note that refrigerant feed and heating can occur simultaneously when the heating circuit setpoint and
temperaturesetpointaresetclosetogetherincontinuouscontrolmode.Theparametersmustbeset
accordingly.
ATTENTION
Damage to equipment and goods! Faulty adjustment of setpoints entails the risk of damage to the
system and merchandise! The setpoint for the heating circuit must be set lower than for cooling.
A second zone must not be selected when heating circuit control is used. Only then is it possible to
adjust the setpoints.
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Control of heating circuit and temperature takes place simultaneously. Actuation of heating and cooling
at the same time can be prevented by selecting on-off mode for temperature control instead of
continuous temperature control. When the heating circuit setpoint is set to -- in single-zone operation
(Temperature Zones parameter set to 1), the Cooling 2 relay is operated at the same opening degree
as Cooling 1 relay (push-pull action).
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