Operation Limits - mycom 2016 C Series Instruction Manual

2.3.2

Operation Limits

Items
Maximum discharge pressure
Minimum suction pressure
Maximum intermediate
pressure
Minimum intermediate pressure
Oil supply pressure
1) Journal lubrication
pressure
2) Bearing and oil injection
minimum lubrication
pressure
3) Balance piston minimum
lubrication pressure
Suction temperature
Maximum discharge
temperature
Maximum oil supply
temperature
Minimum oil supply temperature
Maximum M rotor rotation
speed
Minimum M rotor rotation speed
Note 1: Unless otherwise noted, the pressure unit MPa represents the gauge pressure in this manual.
Note 2: When it is required that pressure difference between Pd and Ps should be not greater than
0.49 MPa, oil pump needs to be installed.
If a combination of "NH
lubricating oil, oil pump must be installed.
 If operation at partial load, which is not greater than 30% of the indicated load, is
continued for a long time except when starting up the machine, abnormal noises
or vibration may be generated. So avoid such operation.
 Repeated startup and stop in a short period is harmful not for the startup devices
and electric machinery but also for the compressor itself. For information on the
start/stop limitations, refer to each instruction manual. Wait at least 15 minutes
after stopping the compressor before restarting it.
Compound 2-stage Screw Compressor 2016**C
Chapter 2 Configuration and Specifications of Compressor
Table 2-2 Operation Limits of 2016**C
Operation Limits
1.96 MPa *Note 1
-0.080 MPa
0.588 MPa
> Suction pressure
Ps: Suction pressure, Pd: Discharge pressure
Pd + (0.049 to 0.39)
MPa
Ps + 0.49 MPa
*Note 2
Pd + 0.049 MPa
max. 85°C
min. -60°C
Low-stage 90°C
High-stage 100°C
60°C
30°C
4000 rpm
1450 rpm
+ compatible oil (PN46)" is used for working fluid (refrigerant) and
3
2-3
2200LZJE-HO-C6-N_2013.12.
Remarks
Casing design pressure: 2.6 MPa
Shaft seal, inherent properties
Bearing
Recommended condition:
> Suction pressure + 0.1 MPa
Balance piston lubrication
(Pressure lubrication)
Check valve must be installed.
Clearance allowed between rotor and
casing Casing design
Clearance allowed between rotor and
casing
Oil viscosity should be not less than
2
13mm /s.
(Optimally, oil viscosity should be between
2
13 and 40 mm /s.)
Oil viscosity should be not higher than
2
60mm /s.
Bearing, inherent properties, seal
Bearing
2.3 Compressor Specifications