Boge airtelligence PROVIS, Operating Instructions Manual

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VARIOUS SPEED COMPRESSOR
4
The various speed regulated compressor is integrated actively
He sends the information about his motor speed over his analog output to
air
telligence PROVIS
. This parameter must be
programmed to the minimal and maximum capacity delivered compressed air. The analog output various speed regulated
compressor inter- preted for 4-20 mA. The analog signal of Compressors with an analog output of 0-10 VDC must be changed
from 0-10 VDC with a receiving multicoupler to 4-20 mA.
The right combination of compressor capacities
together with speed regulated and normal compressors with a firm performance is decisive for good results in regulation. Is the
various speed regulated compressor the smallest in combination with only bigger compressors there are only small section
regulated by the various speed compressor. Big mechanical hurdle cannot be regulated directly.
Example of the right interpretation of the performances:
45 36 27 18 9 0
2,5-16 m³/min
10 m³/min
20 m³/min
0
9
18
27
36
45
45 36 27 18 9 0
0
9
18
27
36
45
m³/min m³/min
Pmin
Pmax
Pmin
Pmax
2,5-16 m³/min
20 m³/min
20 m³/min
RIGHT combination WRONG combination
The freely definable regulation limits
switches smaller compressor direct ON or OFF direct in the pressure band. The regulation limits are defined with regulation
range max and regulation buffer. The regulation limits are then active if at least a compressor is smaller than the difference
between the minimum capacity and regulation range max, minus buffer (in m³/min) of the regulated compressor. If setting the
regulation range max on e.g. 15m³/min, then the consumption trend is watched over a short time to start the next compressor.
The regulation range of VS compressor is enlarged.
If setting regulation buffer on e.g. 2 m³/min, and the air consumption is lower than 13 m³/min,then the consumption trend is
watched over a short time to switch OFF an small compressor.
With the freely definable minimal capacity
of the various speed compressor you can determine whether the compressed air production can be produced below this point
with an normal load/unload compressor. The range will be from 0 m³/min up to the 50% of the capacity from the speed regu-
lated compressor. If this is point is setted to 0 m³/min the VSD compressor is responsibly also for the lower area in the
start/stop mode.
Respect: installation of pressure transducer with 2 regulated compressors
As an option is availably a control program for 2 regulated compressors. The pressure transducer of
air
telligence PROVIS
and the both VSD compressors must be installed at the same location !!!