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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.
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).
Summary of Contents for Case Controller UA 4 E Series
Page 23: ...Firmware V3 13 21 04 2021 23 466 For more details see chapter Operation UA 4xx E ...
Page 135: ...Firmware V3 13 21 04 2021 135 466 Exit the menu by tapping the ESC button twice ...
Page 158: ...Firmware V3 13 21 04 2021 158 466 Anschlussbild UA 401 E CC One zode controller ...
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