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5SETTING HYSTERESIS PARAMETERS
HYSTERESIS (factory setting of 0.5 °C)
Set from 0.1 to 6 °C. According to the value preset, the thermostat switches on at the temperature:
T switching = T required - HYSTERESIS
Set the hysteresis by turning the “ “ button, and confirm with the “ “ button.
MINIMUM SWITCH-ON TIME (factory setting of 2 min)
Here you can set the minimum switch-on time of the boiler in minutes at hysteresis. Select within the range
from 1 to 5 minutes according to the type of the heating system used (see the table).
Set the value by turning the “ “ button, and confirm with the “ “ button.
6SETTING PI-CONTROL PARAMETERS
PI-CONTROL INTERVAL factory setting of 10 min.)
Select according to the object’s thermal inertia. The optimum setting usually falls within the range of 10 to 15
min. The adjustable range is 5 min to 20 min (by 1 min).
Set the interval by turning the “ “ button, and confirm with the “ “ button.
MINIMUM SWITCH-ON TIME (factory setting of 2 min.)
Select within the range of 1 to 5 minutes. The setting is given by the
heating system type, and depends on the PI-control time period selection.
Setting according to the table is recommended.
Set the value by turning the “ “ button, and confirm with the “ “ button.
PI-CONTROL BAND (factory setting of 2 °C)
This value determines the temperature at which the PI-control starts functioning. For example, the desired tem-
perature is 22 °C, the proportional band is 1.5 °C. Up to 20.5 °C, the source heats fully. When this value is
reached, the PI-control starts. The PROPORTIONAL band can be set within the range of 0.5 to 3.0 °C (by 0.1 °C).
Set the PI band by turning the “ “ button, and confirm with the “ “ button.
7PRELIMINARY SWITCH-ON OF HEATING (NO SET BY DEFAULT)
This function guarantees you the required temperature at the required time. You need not consider when to
switch the heating on in order to be warm when getting up in the morning without heating unnecessarily long
in advance. You just program the time at which you want the desired temperature. Within two operating days,
the program ascertains the thermal constants of the room and then it switches the heating on in advance
sufficiently. The preliminary switch-on time is limited to 2 hours.
Set YES/NO by turning the “ “ button and press the “ “ button to confirm.
8SUMMER MODE (NO SET BY DEFAULT)
In this mode, you are not allowed to switch the heating on. It can particularly be used in the summer
period, when you need not heat. After you enable this mode, the “ “ symbol appears on the display.
Set YES/NO by turning the “ “ button and press the “ “ button to confirm.
Note: The anti-freeze protection (3 °C) is still enabled. In this mode, you cannot change the temperature or set
the holiday mode!
9EVEN-ODD WEEK SELECTION (NO SET BY DEFAULT)
If you choose “YES”, the PrU and PrL programs will alternate automatically according to the current week
(even/odd). This setting is suitable, for example, for shift operation (the requirements on thermal comfort in the
object change every week).
Set YES/NO by turning the “ “ button and press the “ “ button to confirm.
10 HEATING / COOLING SELECTION (HEAT SET BY DEFAULT)
Setting the thermostat function.
HEATING = the output relay (for heating systems) switches if the current temperature drops below
the desired value
COOLING = the output relay (for cooling systems) switches if the current temperature rises above
the desired value
Set HEAT/COOL by turning the “ “ button and press the “ “ button to confirm.
11 TEMPERATURE CORRECTION (0 °C SET BY DEFAULT)
This is used for correcting the temperature measured by the thermostat. The setting can only be done after 12
hours of operation, when the internal sensor temperature has settled. Measure the room
temperature with a thermometer; if it is different from the temperature on the thermostat,
set the correction within the range of -5 °C do +5 °C.
Set the correction by turning the “ “ button and press the “ “ button to confirm.
HYSTERESIS
MIN TIME ON
MIN TIME ON
PI ZONE
PRE SWITCH MOdE
SUMMER MOdE
Odd-EVEN MOdE
HEATING
TEMP CORRECT
Heating type Minimum source
switch-on time
Electric heating 1
Plate radiators 2 (3)
Cast iron radiators 4
Floor heating 5
