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Jung 1790D Series - Intended Use; Product Characteristics; Functional Description

Jung 1790D Series
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LB management
Display standard for room temperature control
Icons of the operating area (4)
Ƨ Step back / display current time
ƨ Confirm input / display current time
Ƙ Switch between manual operation and automatic operation
+ / – Increase or reduce the displayed temperatures or times / navigation in menu
ƣ Call up and terminate the programming menu
3 Intended use
Manual and time-controlled regulation of the room temperature
Operation with room temperature controller insert or switch insert from LB management
4 Product characteristics
Timer with three memory areas
Comfort and ECO time for Mo-Fr and Sa-Su in each memory area
Setting a comfort, ECO, cooling and frost protection temperature
Current time can be saved as switching time, quick programming
Automatic summer time changeover, can be switched off
Illuminated segment display for easy reading
Operating lock
Optimised heating up (temperature is reached at the set time), can be switched off
Adaptation to valves (deenergised open or deenergised closed)
Cooling mode possible
Supports internal and external temperature sensor
Temperature drop detection (call-up of frost protection temperature when window is
opened)
Offset adjustment (correction value for measured temperature)
Controller output working method: pulse width modulation (PWM) or two-point
Valve protection function (once a week opening and closing of valve, on Saturdays at
11 a.m.)
Interrupts the heating process after 60 minutes for 5 minutes
Display switch-off after 2 minutes or permanent display available
5 Functional description
Heating and cooling operating mode
Modern heat pump systems often also provide the option of cooling rooms. This function is sup-
ported by the cover by means of the "Heating and cooling" operating mode. In this operating
mode the system permanently regulates the temperature to the set cooling temperature. There
are no time programs in cooling mode. The only way to change the cooling temperature con-
sists in adjusting the temperature parameters, the
+/-
buttons cannot be used.
In conjunction with a room temperature controller insert, cooling mode is activated by applying
mains power to input terminal "C". With switch inserts, cooling mode is activated by applying
mains power to extension input "1". In general, the heat pump features a corresponding output
or a switch can be used.
Frost protection / temperature drop detection Ʒ
The frost protection temperature is the minimum temperature regulated by the controller in order
to avoid frost damage. In case of a significant temperature drop, e.g. after opening a window,
the system regulates to the frost protection temperature for a maximum of 30 minutes. This re-
quires the temperature drop detection parameter Ʒ to be activated.
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32401503 19.05.2020
J0082401503