TECH ST-408, User Manual, Page: 14 / 28

ST-408 – user's manual
IV.e.1) Temperature control
This parameter determines water temperature measurement (control)
frequency behind the CH or HUT installation valve. If the sensor indicates a
change in temperature (deviation from the set value), then the electric valve
will open or close by the set stroke, in order to return to the preset
temperature..
IV.e.2) Opening time
Parameter specifying the time needed for the servomotor valve to open
from 0% to 100% position. This time should be selected according to the
owned valve servomotor (stated on the rating plate).
IV.e.3) Single stroke
This is a maximum single stroke (opening or closing) that the valve may
make during one temperature sampling. If it is near the preset temperature,
the stroke calculated on the basis of
WSP PROPORCJON parameter position.
The smaller the single stroke, the more precisely the set temperature can be
achieved. However, the preset temperature is being fixed for a longer time.
IV.e.4) Minimum opening
The parameter determines, which valve opening may be the smallest
Thanks to that parameter, the valve may be opened minimally, to maintain
the smallest flow.
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