Oil Safety Logic; Part 1: Missing Oil Pressure; Part 2: Insufficient Main Oil Pressure During Low Differential - Johnson Controls Frick QUANTUM LX Manual

P < P
A
oil suct
+ 15
No
Reset
t = 0
1
P < P
A
oil suct
+ 10
No
Reset
t = 0
2

Part 2: Insufficient Main Oil Pressure During Low Differential

P < [1.5 x
oil
B
P ] + 15
suct
No
Allow Load
Reset
t = 0
3
FRICK QUANTUM™ LX COMPRESSOR CONTROL PANEL
®
OPERATION - SERVICE
APPENDIX B

OIL SAFETY LOGIC

Part 1: Missing Oil Pressure

No Pump or Demand Pump
(All pressure calculations are in PSIA)
t + 1
1
t > 25 sec.
1
Yes
No
t + 1
2
t > 25 sec.
2
Yes
No
OIL SAFETY LOGIC
No Pump or Demand Pump
(All pressure calculations are in PSIA)
Sv > 40%
Yes
Yes
No
Missing Compressor
WARNING
Yes
t > 2 min.
1
Yes
No
Yes
t
3
Sv > 50%
Yes
No
Inhibit
Load
(Low Oil
(Low Oil
Flow)
t
3
090-022 O (NOV 09)
Oil Pressure
WARNING
Missing Compressor
SHUTDOWN
Oil Pressure
Shutdown A
Missing Compressor
Oil Pressure
SHUTDOWN
Shutdown B
+1
Force
Unload
Flow)
Insufficient Main Oil
Pressure Shutdown
Yes
SHUTDOWN
> 3 min.
No
Page 103
B
B
C