
HPS Rotary Screw Compressor Units
070.700-IOM (MAR 21)
Page 42
Maintenance
LEGEND (Covers all P & I diagrams in this manual)
AS
AIR SUPPLY
C COMPRESSOR
CV
CHECK VALVE
DP
DISCHARGE PRESSURE
FG
FLOW GLASS
FS
FLOW SWITCH
GCOC GLYCOL COOLED OIL COOLER
HTR HEATER
HV
HAND VALVE
HX
HEAT EXCHANGER
LG
LEVEL GLASS
LIC
LEVEL INDICATING CONTROLLER
LS
LEVEL SWITCH
LSL
LOW LEVEL SWITCH (ALARM)
LSLL
LOW LEVEL SWITCH (SHUTDOWN)
LSH
HIGH LEVEL SWITCH (ALARM)
LSHH
HIGH LEVEL SWITCH (SHUTDOWN)
M MOTOR
MV
MOTOR OPERATED VALVE
1MC
MOTOR CONTROL CENTER
2MC
MOTOR CONTROL CENTER
NOS
NO OIL SWITCH
NV
NEEDLE VALVE
OF
OIL FILTER
OP
OIL PRESSURE
P PUMP
PAH
HIGH DISCHARGE PRESSURE (ALARM)
PAHH HIGH DISCHARGE PRESSURE (SHUTDOWN)
PAL
LOW PRESSURE (ALARM)
PALL
LOW PRESSURE (SHUTDOWN)
PCV
PRESSURE CONTROL VALVE
PDAH HIGH PRESSURE DIFFERENTIAL (ALARM)
PDAH HIGH PRESSURE DIFFER. (SHUTDOWN)
PDI
PRESSURE DIFFERENTIAL INDICATOR
PDSLL COMPR. LOW PRESS. DIFFER. CUTOUT
PE
PRESSURE TRANSDUCERS
PI
PRESSURE INDICATOR
PIC
PRESSURE INDICATION CONTROLLER
PM
PUMP MOTOR
PS
PRESSURE SWITCH CONTROL
PSV
HIGH PRESSURE SAFETY VALVE
PV
PRESSURE VESSEL
RTD
RESISTANCE TEMPERATURE DETECTOR
SP
SUCTION PRESSURE
STR STRAINER
TAH
HIGH TEMPERATURE (ALARM)
TAHH HIGH TEMPERATURE (SHUTDOWN)
TAL
LOW OIL TEMPERATURE (ALARM)
TALL
LOW OIL TEMPERATURE (SHUTDOWN)
TC
TEMPERATURE CONTROLLER
TCV
THERMAL CONTROL VALVE
TE
TEMPERATURE ELEMENT
TI
TEMPERATURE INDICATOR
TS
TEMPERATURE SWITCH
TSH
TEMPERATURE SWITCH HIGH (ALARM)
TSOC THERMOSYPHON OIL COOLER
TT
TEMPERATURE TRANSMITTER
TW THERMOWELL
VI
VI CONTROL
WCOC WATER COOLED OIL COOLER
WS
WATER SUPPLY
XAH
HIGH VIBRATION (ALARM)
XAHH HIGH VIBRATION (SHUTDOWN)
XE
VIBRATION ELEMENT
Figure 42: PID example for a CO2 cascade compressor package
XT
VIBRATION TRANSMITTER
YY
SOLENOID VALVE
ZI
POSITION INDICATOR
ZT
POSITION TRANSMITTER
ZV
POSITION VALVE
BP-1
DISCHARGE BYPASS
SB-2
INLET BEARING & BALANCE PISTON
SB-3
DISCHARGE BEARINGS, SHAFT SEAL
& UNLOADER PLUG OIL FEED
SC-5
INLET PRESSURE
SC-6
DISCHARGE PRESSURE
SC-7
SEAL WEEPAGE
SC-8
OIL DRAIN CONNECTION
SL-0
LIQUID INJECTION
SM-1
MAIN OIL INJECTION
SM-1
MAIN OIL INJECTION, Vi = 1.05
SV-1 ECONOMIZER
SD-1
COALESCER BLEED
SD-2
LIQUID INJECTION BLEED
TW-1 THERMOWELL
PRESSURE TRANSDUCERS INDICATE:
PE-1
OIL PRESSURE (MANIFOLD)
PE-2
OIL PRESSURE BEFORE FILTER
PE-3
DISCHARGE PRESSURE
PE-4
SUCTION PRESSURE
TEMPERATURE PROBES INDICATE:
TE-1
SUCTION GAS TEMPERATURE
TE-2
DISCHARGE GAS TEMPERATURE
TE-3
LUBE OIL TEMPERATURE
TE-4
SEPARATOR OIL TEMPERATURE
SOLENOID VALVE FUNCTION:
YY-1
ENERGIZE VALVE
SHIPPED LOOSE
SUCTION VALVE
ENERGIZED
CAPACITY CONTROL
DE-ENERGIZED
YY-1
CAPACITY
100%
90%
MICROPROCESSOR NOTES:
1. PRESSURE TRANSDUCERS INDICATE:
PE-1 OIL PRESSURE 0-800 PSIA
PE-2 OIL PRESSURE BEFORE FILTER 0-800 PSIA
PE-3 DISCHARGE PRESSURE 0-800 PSIA
PE-4 SUCTION PRESSURE 0-800 PSIA
2. TEMPERATURE PROBES INDICATE:
TE-1 SUCTION GAS TEMPERATURE
TE-2 DISCHARGE GAS TEMPERATURE
TE-3 LUBE OIL TEMPERATURE
TE-4 SEPARATOR OIL TEMPERATURE
1/4 PURGE/VENT
4
OIL COOLER
SET @ 120° F
R744 RELIEF VALVES SHIPPED LOOSE.
THE R744 (CO2) RELIEF VALVES
SHOULD BE LOCATED OUTDOORS
WITH NO DOWNSTREAM PIPING.
PI
PALL
PAL
PE
1
1
1
1
LG
1
PV-1
HTR-1
HTR-2
4
4
TE
TAL
C-1
M-1
TE
2
TAH
2
TAHH
2
YY-1
PE
3
PAH
3
CV-1
TE
1
SUCTION
AMMONIA
4
TALL
PAHH
3
NV-1
NV-3
STR-1
2
LG
LG
3
1
LSLL
1
LS
TI
1
PI
1
HTR-3
SM-1
SC-6
SB-2
SB-3
SC-5
SD-1
PALL
4
PAL
4
4
PIC
PE
4
SD-2
SC-8
SL-0
SM-2
SV-1
BP-1
500W
500W
3 COALESCERS
1
XE
1
XAH
1
XAHH
2
XE
2
XAH
2
XAHH
OIL FILTER
3
TAHH
3
TAH
3
TI
3
TE
PDAH
2
PDI
PE
2
2
2
LSH
2
LS
1
TCV
LIQUID
AMMONIA
1
PSV
1 HAND EXP
VALVE
C
B
A
1
3/4
24 OD SEPARATOR
3/4 OD
1 OD
3
3/8 OD
4
4
3/8 OD
1/4
1/4
3/4
1/4
3/4
3/4" PUMPOUT
1/4
3/8
3/4 OD
1/2
1
3/4
1/4
3/8 OD
1/2
2
2
SAMPLING
VALVE
2
1/2
1/4
2
1/2
1/2
2
2
2
1 1/2
1 1/2
1 1/2
CASCADE
CO2
HEAT
EXCHANGER
MV-1
MV-2
EVAPORATOR
1 1/2
1 1/2