Chicago Pneumatic CPVS 20, Инструкция по эксплуатации, Страница: 17 / 28

Chicago Pneumatic Compressors
62 305 454 65
01/2008
Page 17
D - Commissioning
1 - Preparation for start-up
(See Section 3 ).
ATTENTION
The power circuit will have to be cut off when adjusting the
electrical equipment or if inadvertent start-up is to be avoided.
Before start-up, check the following points:
1 - Ensure that the unit has a suitable earth,
2 - Check the oil level in the compressor,
NOTE: the tank was filled in the factory with a suitable oil. See
Section 6 - A for the quality of oil to be used and for the oil
renewal conditions.
3 - Check that the oil drain valve is properly closed.
4 - Make sure that the transport pads (compressor) have been
removed from the compressor silentblocks.
ATTENTION
The oil filler plug, the valve and the drain plugs have always to
be closed during operation and must never be opened before the
system has reached atmospheric pressure.
ADAPTATION OF THE INVERTER BUILT IN RFI FILTER
FOR IT ELECTRICAL SUPPLY NETWORK
(For TN and TT network, inverter has to be kept in its factory
configuration)
In case of inverter drive units installed on IT network, the built in
RFI filter has to be disabled as following "photo vacon". This
upper operation will modify the EMC level from the inverter from
class H to class T.
NOTE: Do not attempt to change the EMC-level back to class H
(TN and TT). Even if the procedure above is reversed, the
frequency converter will no longer fulfil the EMC requirements
of class H.
2 - Control of rotation direction on start up
This control must be implemented when the machine is put into
operation for the first time, after any work has been carried out on
the motor and after any changes to the mains supply.
IMPORTANT :
• Check the direction of rotation (as per the arrow shown on the
Fig. 3 page 10 ) by jogging over with the START button.
If it is incorrect, swap over two of the motor's phase cables under
the drive.
When rotating in the right direction, the oil level (
Fig. 10 ) must
drop after 4 to 5 seconds of operation.
• Also check the direction of rotation of the fan for air-cooled
plants (counter-clockwise, as seen from inside the casing).
1 - Press the START button so that the motor starts.
2 - Allow to rotate for several seconds with the discharge valve
slightly open to observe the compressor at load.
3 - Press the STOP button. The motor stops and the plant
automatically returns to atmospheric pressure.
3 - Setting of pressure - machine
The unit is factory pre-set for a given delivery pressure. As an
energy saving measure, it is strongly advised to reduce the pres-
sure to the exact requirement by adjusting the "Set point 1"setting.
The stop pressure"Indirect shutdown"used when running at less
than the minimum flow-rate - must be set to 7.25 PSI above that
of the "Set point 1". In this way, the current used by the compressor
is minimised (see
ES 3000 electronic controller Section 4 - C ).
Do not set the stop pressure at a level beyond the machine's max P.
4 - Assembly and settings for parallel operation
with other compressors
Pressure for the CPVS compressor must be adjusted at a value
within the range of adjustment values for the rest of the
compressors..
RLRV C1 C2 C3
Various
compressors
Adjustments pressure
Stop P
Set
point 1
5 - Regulating the pressure by changing the speed
This method of regulating the pressure allows accurate adjustment
of the compressor's flow-rate at the compressed air demand valve:
The accuracy is of the order of 1.425 PSI when pressure control
is achieved by changing the speed, provided that the flow-rate
lies between the maximum and minimum rates for the machine.
Remove these
screws
Fig. 8
CPVS