Elmo-rietschle L-BV7 Manuel d'utilisateur télécharger pdf (Page 19)

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Description of Vacuum Pump/Compressor

5.3 Operating modes

The pump-motor unit can function in several

different operating modes.

These differ in how the pump-motor unit is

supplied with operating liquid:

 Self-priming operation

 Operation with operating-liquid feed:

– Non-automatic operation

– Automatic operation

5.3.1 Self-priming operation

In this operating mode the pump-motor unit

automatically sucks in the operating liquid.

The operating-liquid flow rate is automatically

adjusted.

See Fig. 8, Pg. 30.

5.3.2 Operation with operating-liquid feed

In this operating mode the pump-motor unit

DOES NOT automatically suck in the operating

liquid.

A certain volume flow ("nominal operating-

liquid flow rate") or pre-pressure must be set

for the operating liquid.

Here the following additional distinctions are

made:

Non-automatic operation

In this case the operating liquid feed is

switched on and off manually with a stop valve.

See Fig. 11, Pg. 32.

Automatic operation

In this case the operating liquid feed is

switched on and off by a solenoid valve. The

solenoid valve is dependent on the motor

operating mode:

 Motor/pump-motor unit switched on:

Valve open.

 Motor/pump-motor unit switched off:

Valve closed.

See Fig. 12, Pg. 32.

NOTICE

The following is dependent on

the operating mode:

 when and how the pump-

motor unit must be filled with

operating liquid the first time,

 how the pump-motor unit is

put into operation.

The specifications for this are

contained in Chapter 7,

"Installation", Pg. 22ff., and

Chapter 8, "Commissioning",

Pg. 28ff.

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