Jung 1790D Series Operating Instructions Manual Download Page 3

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LB management

Display standard for room temperature control

Optimised heating up

Heating is started at most 4 hours before the switching time, so that the desired temperature
has been reached at the switching time rather than starting to heat up at that time. The display
icon

flashes during the heat-up phase.

Note: Optimised heating up is designed for panel heating/radiators.

Offset

If the system detects that the displayed actual temperature differs from the general room tem-
perature, this parameter can be used to enter a correction value in 0.5 °C increments. The ac-
tual temperature will then be corrected by this offset value.

Controller adaptation

The control principle should be adjusted depending on the heating system and the insert used.
Two-point control: The output remains switched on until the selected setpoint temperature has
been exceeded by 0.5 °C. The output will not be switched on again until the setpoint value is
undercut by 0.5 °C. Since most heating systems respond very slowly, this type of control can
entail temperature overshooting.
Pulse width modulation control (

): Optimised for electrothermal valve drives,

e.g. TVA 230 NC WW: The output is not permanently actuated, but only for a time period (pulse
width) that depends on the difference between setpoint and actual temperature. This method
brings the actual temperature gradually closer to the setpoint temperature. The cycle time is
15 minutes.

Valve adaptation

This parameter is used to adapt to the electrothermal valve drives. There are drives that are
either open (deenergised open, setting NO) or closed (deenergised closed, setting NC) when no
power supply is applied.

Temperature sensor

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The room temperature controller cover features a built-in temperature sensor, which is used to
detect the room temperature.
In conjunction with a room temperature controller insert a remote sensor can be connected,
either to measure the room temperature or limit the maximum floor temperature.
The following settings are possible.

: The room temperature is measured using the internal temperature sensor.

: The room temperature is measured using the remote sensor. The internal temperature

sensor is deactivated.

and

: The room temperature is measured using the internal temperature sensor and the

floor temperature is measured using the remote sensor for monitoring the floor temperature. If
the maximum temperature is exceeded, the floor heating will be switched off until the floor tem-
perature is below the maximum value again. This way, an unpleasantly hot floor is avoided.

Behaviour after a mains voltage failure

Voltage failure less than power reserve
–

All data and settings are preserved

Voltage failure greater than power reserve
–

Date and time are reset and need to be set again

–

Temperature control is performed like before the power failure

–

All times set in the weekly timer are retained

–

All settings are retained

Default setting