Johnson Controls SABROE Unisab III Control User Manual

A
B
P oil - 1.1 x
P suct - < lim A
Yes
Yes
No
No
No
Low lubricating
pressure
Low lubricating pressure
ALARM
SHUTDOWN
Reset
t33 = 0
t33 > 120 sec
t33 = 120 sec fixed
t33 > 25 sec
P oil = Absolute oil pressure
P suct = Absolute suct. pressure
Lim A = Shutdown for low pressure
Yes
t33 + 1
Fig. 7: Low lubricating pressure
Note: For SAB 157HR: the alarm delay is 120 seconds and the shutdown delay is 180 sec-
onds.
B
C
P oil > [1.5 x
P suct ] + 1.0 bar
No
No
Yes
No
Insufficient main oil
pressure shutdown
Yes
SHUTDOWN
No
Yes
Allow load
Reset
t36 = 0
Sv < 40%
Sv > 50%
Inhibit
load
Force
unload
Yes
t36 > 3 min
t36 + 1
Fig. 8: Insufficient main oil pressure during low differential pressure
Alarms and shutdowns
Engineering manual - Unisab III 1.10
001930 en 2014.09
55/319

Johnson Controls SABROE Unisab III Control Specifications

General

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