160GR Natural Gas Booster Instruction Manual
Mayekawa all rights reserved. Subject to change without notice. Lat revised in October 2007
p.5
settings, make sure that the compressor is at a stop and that the gas inside the compressor is
discharged in the air.
Vi should not be changed while the compressor is running.
To Change Vi Settings
[CAUTIONS]
・
On this compressor, Vi should be changed after the compressor is opened to the
atmosphere.
・
Vi settings should be changed while the compressor is stopped. Also, make sure the drive is
not moving or will not move.
・
The interior air pressure of the compressor needs to be equal to the air pressure before
proceeding with changing Vi settings.
Figure1: Variable Vi Structure Cut-up View
The compressor is set at the M port when shipped. Choose the most appropriate Vi setting
for the expected operating conditions.
When the appropriate port is to be other than the M port, the Vi setting needs to be changed
before operations. When the pressure conditions dramatically change during an operation,
the Vi needs to be changed to an appropriate setting.
There are 4 ports: H (Vi=5.0), M (Vi=3.65), L (Vi=2.63), K (Vi=2.3).
3.1.1 When the position of the current port is known
When the position of the current port is known, change the Vi setting by referring to
[Graph1] and choosing the appropriate number of rotations and the direction of the rotation.
a) Make sure the slide valve is on full-load on the current Vi condition (Turn the capacity
control handle in clockwise until it stops).
