ST-408N – user's manual
YA, YB, YC, YD – set temperatures of the valve for respective external
temperatures: XA, XB, XC, XD
After weather-based control is switched on, valve set temp. parameter is not
available.
IV.d.8) Change in valve set temp.
This setting determines by how many degrees the valve temperature is to increase
or decrease with a single unit change in room temperature (see: Room
temperature difference) This function is active only with TECH room regulator and it
is closely related to the Room temperature difference parameter.
IV.d.9) Room temperature difference.
This setting is used to define the single unit change in the current room
temperature (with the accuracy of 0.1°C) at which a predefined change in the set
temperature of the valve will be introduced (function available only with TECH room
regulator).
Example:
setting: room temperature difference 0,5ºC
setting: change in set valve temperature 1ºC
setting: set temperature of the valve 40ºC
setting: set temperature of the room regulator 23ºC
Case 1. If the room temperature rises to 23.5ºC (by 0.5ºC ) the valve will close to
such an extent as to have 39ºC as a set-point (by 1ºC ).
Case 2. If the room temperature drops to 22ºC (by 1ºC) the valve will open to such
an extent as to have 42ºC as a set-point (by 2ºC).
IV.d.10) Room temperature reduction
This function is active only if the valve cooperates with the two-state
(standard) room regulator. The user defines the value of valve temperature
reduction which will be performed when the room regulator reaches the set
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