Agilent Technologies TriScroll 620 Series, Инструкция по установке и эксплуатации

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15
TriScroll 620 Series Vacuum Pump
DRAFT 10/30/14
Optional Isolation Valve
Scroll pumps return to atmospheric pressure quickly
when shut off, thus the installation of a fast acting,
automatic, normally closed isolation valve is strongly
recommended to prevent pump debris from being
transported back into the vacuum chamber when the
pump is turned off.
❑
The opening of this valve should occur
simultaneously with or after pump startup.
❑
Valve closing should occur before,
simultaneously with, but no later than 250 ms
after pump shut off.
Use an NW25 valve or larger and mount it as close as
possible to the pump inlet. Mounting to the pump inlet is
ideal. (See Figure 5).
.
Figure 5 Isolation Valve Location
Agilent offers a variety of manual, electromagnetic and
electropneumatic controlled vacuum valves for vacuum
applications. The Agilent Vacuum Pump Isolation (VPI)
Valve is highly recommended for vacuum pump isolation
applications. The VPI valve application and installation
information for use with TriScroll vacuum pumps has
been included below.
Overview
The status of the VPI Valve is controlled by the TriScroll
motor internal thermal switch and its electrical supply.
The VPI Valve opens when the pump is running and
closes when it is stopped. It will also close when the
TriScroll motor thermal overload protection switch shuts
down the pump.
Wiring
Using the data in Table 4, verify that the VPI Valve chosen
is compatible with the TriScroll supply voltage and
frequency. Then, locate the proper wiring diagram to use
(Figure 4 on page 13).
1. Remove the three screws (item 12 in Figure 3 on
page 11) that are holding the motor electrical cover
(item 13 in Figure 3).
2. Connect the VPI Valve solenoid wire leads to the
pump motor as shown in Figure 4.
3. Replace the motor electrical cover and secure it using
the three screws removed in step 1. Verify that the
valve is properly grounded before applying
electrical power.
.
*
Solenoid operating voltages are lower than the TriScroll vacuum pump operating voltages in order to utilize the TriScroll motor’s inter-
nal thermal switch to actuate the VPI Valve.
Isolation Valve
Pump Inlet
CAUTION
To prevent damage to the VPI Valve, it
must be installed by a qualified electri-
cian and only as specified below.
Table 4 VPI Valve Installation Data
Motor TriScroll Vacuum Pump
Operating Voltage
VPI Valve Part #
NW25
VPI Valve Part #
NW40
Solenoid Operating
Voltage Range
Use the following
Wiring Diagram
1 Phase 100-120 V 50/60 Hz VPI251205060 VPI401205060 90-132 V Figure 4 low voltage
1 Phase 200-230 V 50/60 Hz VPI251205060 VPI401205060 90-132 V* Figure 4 high voltage
NOTE
VPI valve not available on pump model
X3862-64000.