mycom i160M

2203M4-JE-MY-iS2-N_2017.04.
Chapter 2 Compressor Specifications and Configuration
Screw Compressor i-series 2.3
Compressor Specifications
2-3
2.3.2 Operation Limits
Table 2-2 Operation Limits of i-series Compressor
Item
Normal operation range
*Note 1
Permissible limit
Speed
min
-1
2950 @50 Hz
3550 @60 Hz
125S, 160S: Max. 4500 *Note 2
125L, 160M, 160L : Max. 3550
Discharge pressure
MPa
1.0 to 1.9 Max. 1.9
Suction pressure
MPa
0.02 to 0.35
Max. 0.6
Min. -0.05
Differential pressure for
lubrication (Po - Ps)
*Note3
MPa
≥ 0.5 Min. 0.5 *Note 4
Discharge gas temperature
°C
Condensing temperature +
15 to 90
Max. 90
Superheating degree of
suction gas
°C
5 to 20 —
Oil supply temperature
°C
30 to 60
Max. 80 BBSE
*Note 2
Min. 30
Supply oil viscosity
(kinematic viscosity)
mm
2
/s
13 to 40
Min. 13
Max. 300 (At start-up time)
Vibration standard value at
shipment
μm
(Half amplitude) 20 —
Noise standard value at
shipment
dB (A)
125S, L, 160S, M: 84
160L: 85
—

Unless otherwise noted, the pressure unit MPa represents the gauge pressure in this manual.
*Note 1: For operations outside the normal operation ranges, consult our compressor manufacturing
division.
*Note 2: When performing a speed-increasing operation by inverter at 70 °C or above oil temperature,
contact our compressor manufacturing division to confirm the temperature on the mechanical
seal sliding surface.
*Note 3: Po = Oil supply pressure, Ps = Suction pressure
*Note 4: This value excludes the start-up of the compressor. Refer to Note 2 in the next section.
 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.