Operation Manual

Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 71 of 71
7.4 Dead zone
The dead zone is a buffer area between heating and cooling operation.
Neither heating nor cooling takes place within this dead zone.
If Cheops control switches to cooling operation, the set point value is increased internally by
the amount of the dead zone.
Without this buffer zone, the system would switch continuously between heating and cooling.
As soon as the set point value had been under-run, the heating would activate and when the
set point value would be achieved, cooling were to be started immediately and the
temperature would fall to below the set point value and switch on the heating again.
7.5 Valve stroke
Mechanical path that is between the two end positions, i.e. 0% (valve closed) and 100%
(valve fully open) covered (see Valve arrangement diagram).