Johnson Controls SABROE Unisab III Control User Manual

7.6. Electrical slide systems (certain screw compressors)
The built-in capacity slide position transmitter must be adjusted correctly to ensure safe and
reliable slide control. This adjustment must always be carried out as described in
7.6.2. Transmitter adjustment. Afterwards, the capacity signal must be adjusted by software
as described in 7.5.13. Software calibration, hydraulic slide systems.
7.6.1 Manual slide positioning
Contrary to hydraulic slides, the electrical capacity slide can be positioned manually for test-
ing. This is useful when performing transmitter adjustment and software adjustment. Select
Setup/Compr. Control Mode = Stop and then Setup/Configuration/Calibrate/Position.
The following picture will appear:
While this picture is open (and Unisab III is still in Stop mode) the capacity slide can be
moved by means of
F2
/CAP. UP and
F3
/CAP. DOWN.
Note that when reaching the end stop, the shutdown Capacity error will be displayed after two
seconds. Release the button at once and reset the shutdown.
7.6.2 Transmitter adjustment
The capacity transmitter is fitted with a single calibration button surrounded by a green and a
red LED as shown in Fig. 37.
LED position
(Green)
Calibration
push button
LED-working
(Red)
Normally, not visible
For calibration
remove cover
Fig. 37: Capacity transmitter
Calibration
Engineering manual - Unisab III 1.10
001930 en 2014.09
249/319

Johnson Controls SABROE Unisab III Control Specifications

General

Brand	Johnson Controls
Model	SABROE Unisab III Control
Category	Control Systems
Language	English