2.
If the compressor has been running for more than 90 seconds but less than 180 seconds and
DOP < (Oil Setpoint1/90)*(Comp. Running Time [in seconds] - 90)
for 3 continuous readings, then the alarm shall be tripped.
3.
If the compressor has been running for 180 seconds or more, then if:
a). DOP < Oil pressure setpoint1 for 15 continuous seconds,
OR
b). (Poil - Psuction) < Oil pressure setpoint2 for 15 continuous seconds,
then the alarm shall be tripped.
Action To Be Taken
1.
If the alarm is tripped then the affected compressor shall be stopped. The other compressors shall
continue to run.
4.17.4- Differential Oil Pressure Setpoint 1 alarm condition summary.
CARRIER SA
USER'S GUIDE FOR
30GX&HX PRO_DIALOG 4 V.2
ECG-UG-02-002
Rev: Original
Page: 50/98
©
C
ARRIER
S
.
A
NOT
TO
BE
DISCLOSED
TO
PERSONS
OUTSIDE
CARRIER
ORGANIZATION
0
Di
fferen
ti
al
Oi
l pres
su
re req
u
ired
180s
oil pressure trip
Oil pressure trip with low ambient or
90s
30s
5s
oil setpoint1
oil setpoint1
oil setpoint1
oil setpoint1
3 continued
3 continued
3 continued
3 continued
reading values
reading values
reading values
reading values
3 continued
3 continued
3 continued
3 continued
reading values
reading values
reading values
reading values
15 s delay
15 s delay
time from start
low condensing temperature
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