TECHNICAL INFORMATION
4. Use silver-plated screws or apply high tem-
perature lubricant to the screw threads. Lubri-
cation simplifies sealing and disassembly. A
recommended lubricant is Fel-Pro C-100.
5. Attach the nuts and tighten each one to 4.5 - 8
ft.-lbs (0.6 - 1.1 Kgm) of torque. After tightening
a nut, always tighten the opposite nut with re-
spect to the center of the flange. This will par-
tially close the gap between the flange faces.
6. Repeat the sequential tightening for two more
cycles.
7. Continue tightening the bolts until the flange
faces meet and a pronounced increase in
torque is felt.
Note that it’s not possible to install the screws from
the lower side, but only from the upper side of the
flange. To allow complete flexibility in the installa-
tion, a stud mounting kit is available (see Fig. 17).
For ordering information refer to the “VacIon
Plus
pump replacement parts and accessories” para-
graph.
Fig. 17 - Stud mounting kit
CONTROL UNIT CONNECTION
,
WARNING!
The high voltage present in the high voltage cable
which connects the control unit to the ion pump,
can cause severe injury or death. Before mounting
the high voltage connector of the cable on the
pump high voltage feedthrough, or before remov-
ing it, be sure the main power is removed from the
control unit.
To avoid injury, never connect the high voltage to
the pump before it is installed into the system and
all the inlet flanges are properly connected or
blanked off.
,
WARNING!
Before removing the high voltage connector of the
cable from the control unit, be sure the main power
is removed from the control unit. Wait at least 10
seconds after removing the main power from the
control unit, to allow capacitors to discharge com-
pletely.
To disconnect the coaxial high voltage cable from
the controller, slide the safety locking sleeve (very
little sleeve travel is required) from the control unit
and at the same time pull on the male end of the
cable connector to remove it from the socket on
the control unit.
SAFETY INTERLOCK
The VacIon
Plus
pump feedthrough in conjunction
with the cable P/N 929-0705, when used with the
Varian MidiVac and DUAL control units, allows the
operation of the “High Voltage Cable Safety Inter-
lock” feature.
When the high voltage cable connector is discon-
nected from the VacIon
Plus
pump feedthrough,
the high voltage is automatically switched off by
the control unit
HEATER INSTALLATION
The heating element is a coaxial resistance heater
shaped to fit the bottom of the pump body.
To install the element proceed as follows (Fig. 18):
1. Disassemble the red cover by loosening the
two screws;
2. Remove the pump from the magnet;
,
WARNING!
If some shock occur to the magnet assembly,
when the pump is removed, the magnets can at-
tract each other with the possibility of trapping fin-
gers, shattering the magnets or damaging the
equipment.
In order to avoid this insert a piece of wood or
plastic in place of the pump body to keep the
magnets separated.
3. Install the heater around the pump body;
4. Reinstall the pump body and the red cover.
16
87-900-106-01(B)
