2205B0JE-DA-J-N_2014.05.
2 Structure and Specifications of the Compressor
Screw Compressor J-series
2.8 Variable Vi Control
2-30
2.8.3.2 Fixed Vi Mode
The J-series also allows for fixed Vi if the operating conditions are stable and the automatic variable Vi
control is not necessary.
Note, however, a specified controller is required to adjust the variable Vi slide valve to the desired Vi
value. It is able to set Vi to the following three ports: L port (Vi=2.5), M port (Vi=3.5), H port (Vi=5.0).
Note 1: For the J-series, a specified controller is always required.
2.8.4 Vi Position Sensor
Figure 2-27 Vi Sensor Wiring Diagram
Table 2-9 Relationship between Vi and Vi Sensor Output
P o r t
Vi
R a t i o t o f u l l s t r o k e ( %)
R e s i s ta n c e (
Ω
)
O u t p u t vo l ta g e
r a t i o ( %)
L 2.5
0
830
83
M 3.5
56
550
55
H 5.0
100
330
33
Table 2-10 Specifications of the Potentiometer
I t e m
Sp e c i f i c a t i o n s
Total resistance
1k
Ω
±20%
Rated power
0.3W/50°C
Insulation resistance
100M
Ω
or more 500V DC
Withstanding voltage
500V AC for 1 minute
Working temperature range
-40—100°C
Figure 2-28 Vi Sensor Dimensions
