P2.x AMEX
5.1 Switching on the sample gas pump
Before switching on the device, ensure that:
– the hose and electrical connections are undamaged and correctly installed,
– no parts of the sample gas pump have been dismantled (e.g. cover),
– the gas inlet and outlet of the sample gas pump is not shut,
– the preliminary pressure is under 0.5 bar,
– in the event of throttling under 150 l/h (P2.x Amex) or under 400 l/h (P2.8x Amex) in continuous operation, a bypass is avail-
able,
– the ambient parameters are complied with,
– information on rating plates is observed,
– the voltage and frequency of the motor correspond to those of the network,
– the electrical connections are tightly fastened and the monitoring devices have been connected and configured correctly!
– air inlet openings and cooling surfaces are clean,
– protective measures have been carried out; earthing!
– the motor is secured correctly,
– the terminal box cover is closed and the cable entry points have been properly sealed,
– the elastomer sprocket of the coupling is correctly installed and undamaged,
– depending on the operating mode, the necessary protective and monitoring devices are present and functional (depending
on the type of pump, e.g. motor circuit breaker, manometer, flame arrestor, temperature monitoring).
When switching the sample gas pump on make sure that
– no abnormal sounds or vibrations occur.
– the flow rate is neither too low nor too high. This would indicate a cracked bellow.
5.2 Operating the sample gas pump
The sample gas pump is intended exclusively for the pumping of gaseous media. It is not suitable for liquids.
The sample gas pump should be operated without pre-compression. A preliminary pressure of more than 0.5 bar is not permit-
ted. The gas outlet must not be shut. The flow rate must be at least 50 l/h for the P2.x AMEX and at least 200 l/h for the P2.8x
Amex pumps. In the event of throttling under 150 l/h for the P2.x AMEX and under 400 l/h for the P2.8x Amex pumps in continu-
ous operation, the flow rate must be regulated via a bypass. In this case you should choose a version with bypass valve.
NOTICE
Extreme throttling reduces the life time of the bellow.
For pumps with an integrated bypass valve, the output power can be adjusted. Do not expend a great amount of power when
turning the valve as otherwise the valve could be damaged! The turning range of the valve is around seven rotations.
NOTE: Read and observe the maintenance plan!
16
Bühler Technologies GmbH
BE420003 ◦ 04/2017
