Installation
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300407956_002_C1 - 01/2017 - © Leybold
Fig. 3.13 LEYVAC 80 with optional exhaust pressure sensor
Fig. 3.14 Position of the orifice plate to be inserted
3.7.3 Exhaust Pressure Sensor (option)
An exhaust pressure sensor may be installed optionally above the elbow. This
sensor is purge gas protected; the connection is provided by the customer.
At a pressure of 0 bar (g) the output voltage is 1 VDC; with a pressure of 1
bar (g) it is 5 VDC. For more information on connecting the sensor refer to
the manufacturer’s specs. The pump must be turned off with an exhaust
pressure of 0.3 bar (g).
Before starting any installation work on the pump, shut down the system
and leave it to cool down.
In particular observe Safety Information 0.3 and 0.4.
Retrofitting must only be carried out by duly trained personnel. The electri-
cal connection must only be provided by a trained person.
The conversion kit consists of the exhaust pressure sensor as well as all nec-
essary pipes, T-pieces, and fittings.
Only C-an CC-type pumps:
Remove the top and side covers.
Remove the plug above the elbow and screw in the corresponding threaded
connector of the exhaust pressure sensor kit. Use Loctite 542 to ensure for
leak tightness. At the upper tee remove the blank flange from the shaft seal
purge gas pipe. Connect all pipes and tees as shown above. Make sure to
insert the orifice plate into the riser of the lower tee.
DANGER
