Installing Vpi Valve To Agilent Triscroll™ Vacuum Pump; Triscroll 300, 320, 600, And 620; Wiring; Vpi Valve Installation Data - Agilent Technologies VPI Series Instruction Manual

2.2 Installing VPI Valve to Agilent TriScroll™ Vacuum Pump

TriScroll 300, 320, 600, and 620

2.2.1
When installed correctly, the position of the VPI Valve is controlled by the TriScroll vacuum
pump motor internal thermal switch and it's electrical supply. The VPI Valve will open
when the pump is running and close when it is stopped. It will also close if the TriScroll
motor thermal overload protection switch shuts down the pump.

2.2.2 Wiring

Refer to Table 3 to verify that the VPI Valve to be installed is compatible with the TriScroll
Vacuum Pump supply voltage and frequency. Then, find the proper wiring diagram to use
from Table 3. Remove the pump motor cover and connect the VPI Valve solenoid wire leads
to the pump motor as shown in the diagram. Replace the pump motor cover, and verify that
the valve is properly grounded prior to applying electrical power.
TriScroll
Vacuum Pump
Operating Voltage
100-120 VAC
50/60 Hz
1 Phase
200-230 VAC
50/60 Hz
1 Phase
200 VAC
50/60 Hz
3 Phase
230 VAC
50/60 Hz
3 Phase
380 VAC
50/60 Hz
3 Phase
18
Vacuum Pump Isolation (VPI) Valve
To prevent damage to the VPI Valve it must be installed only as
NOTE
specified below.
Table 3 VPI Valve Installation Data
NW25
VPI Valve VPI Valve
Part Number Part Number
VPI251205060 VPI401205060
VPI251205060 VPI401205060
VPI251205060 VPI401205060
VPI251335060 VPI401335060
VPI252205060 VPI402205060
NW40 Solenoid
Operating
Voltage Range
90-132 VAC
50/60 Hz
90-132 VAC
50/60 Hz *
90-132 VAC
50/60 Hz *
120-146 VAC
50/60 Hz *
180-264 VAC
50/60 Hz *
Wiring Diagram
Location
Figure 2 on page 19
Low Voltage
Figure 2 on page 19
High Voltage
Figure 3 on page 19
Low Voltage
Figure 3 on page 19
Low Voltage
Figure 3 on page 19
High Voltage