Elmo Rietschle L-BV3 - Manual (Page 9)

Operating modes
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4 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
4.1 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. 4, Pg. 17.
4.2
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. 6, Pg. 19.
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. 7, Pg. 19.
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 6, "Installation", Pg. 11ff., and
Chapter 7, "Commissioning", Pg. 16ff.