Johnson Controls SABROE UniSAB III - Page 140

Engineering manual - UniSAB III 1.10.8
140/346
001930 en 2021.06
Compressor control and surveillance
• Max. slide
When selecting this function, the output will be activated when the relative travel of the capacity
slide position, Capacity slide position [%] > Signal high [%].
When calculating the relative position of the capacity slide, the absolute travel of the capacity
slide position and the Vi slide position is included. The hysteresis between active and inactive
signal is 1%.
Please note that the line Signal high is not included in the menu until the auxiliary output has
been selected as Max slide.
• At bal. cap.
Select this function for SAB 193 H - 355 H to control the balance piston. Set the Signal high limit
and the Signal low limit to appropriate values, both referring to relative slide capacity.
If selecting this function, the output will be activated when the relative travel of the capacity slide
position, Capacity
relative
[%] < Signal low [%] OR Capacity
relative
[%] > Signal High [%] = AUX Out-
put active.
When calculating the relative position of the capacity slide, the absolute travel of the capacity
slide position and the Vi slide position is included. The hysteresis between active and inactive
signal is 1%.
Please note that the line Signal low and Signal high is not included in the menu until the auxiliary
output has been selected as At bal. cap.