LEYBOLD 111065, Руководство по эксплуатации, Страница: 15 / 32

4. Slide the front cover by hand and remove from the pump.
5. Remove the four side screws of back pump cover.
6. Slide the back cover by hand and remove from the pump.
Figure 4.
Remove the cover
1. Front cover 2. Back cover 1. Front cover 2. Back cover
5.5 Electrical Connection
VARODRY is supplied with three-phase motor but without accessories for electrical
connection. They must be connected via the appropriate cable, and a suitable motor
protection switch.
The pump cover must be removed to connect the motor cable.
Set the switch in accordance with the rating on the pump nameplate.
Please observe the diagram inside the motor junction box.
Figure 5. Electrical connection
After connecting the motor and after every time you alter the wiring, check the direction of
rotation. To do so, briefly switch on the motor and make sure that the pump fan rotates in
counter-clockwise direction. If not, interchange two phases of the connection.
An arrow (sticker) indicating the correct direction of rotation is placed on the drive cover.
To avoid damage to the pump or the vacuum system make sure that the inlet of the
pump is not connected to a closed vacuum system when doing this test. Running the
pump at full speed in the wrong direction of rotation will generate pressures up to 4.5 bar
(g) at the inlet port, if not vented to atmosphere.
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300766038_002 - © Leybold
Installation