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2.5.
PRE-SET TEMPERATURE
The pre-set zone temperature depends on the weekly schedule settings. The user may also change this value separately.
After the value has been set, the user defines how long the temperature should apply. When the time elapses, the pre-
set temperature depends on the weekly schedule again.
2.6.
OPERATION MODE
Local schedule – it is a weekly schedule assigned to one zone only. Once a room sensor is detected by the
controller, it is automatically assigned to this zone. It may be edited freely.
Global schedule 1-5 – Global schedule may be assigned to any number of zones. Changes introduced in the global
schedule apply in all the zones where this schedule has been selected.
Constant temperature – The user sets the temperature which will be maintained until this option is deactivated.
After deactivation, the pre-set temperature will depend on the current schedule.
With time limit – This function enables the user to define the pre-set temperature which will apply for a pre-
defined period of time. When the time is over, the pre-set temperature will depend on the previous mode
(schedule or constant temperature without time limit).
2.7.
HYSTERESIS
Hysteresis defines tolerance of the pre-set temperature in order to prevent undesired oscillation in case of small
temperature fluctuation within the range 0,1 - 10⁰C with the accuracy of 0,1°C.
Example: if the pre-set temperature is 23⁰C and the hysteresis is 1⁰C, the zone temperature is considered too low when
it drops to 22⁰C.
2.8.
CALIBRATION
Room sensor calibration should be performed while mounting or after it has been used for a long time, if the zone
temperature displayed differs from the actual temperature. Calibration setting range is from -10⁰C to +10⁰C with the
accuracy of 0,1⁰C.
2.9.
ACTUATORS
Registration – This option concerns wireless actuators STT-868 and STT-869. The registration process is described
in the instruction manual of particular actuators.
The number displayed next to Registration icon informs about the number of registered valves (max. 6).
Valve removal – this option is used to delete all wireless thermostatic actuators STT-868 or STT-869 registered
in the zone from the controller memory.
Settings
SIGMA – this function enables smooth control of the thermostatic actuator. The user may define the maximum
and minimum valve opening – the level of valve opening and closing will never exceed these values.
Moreover, the user configures <Range> parameter, which defines the room temperature at which the valve
starts closing and opening.
