P2.3C, P2.4C
CAUTION
Hot surface
Burning hazard
According to the product type and operation conditions, the
temperature of the housing may exceed 50 °C during opera-
tion.
Depending on the conditions at the installation site it may
be necessary to provide these areas with appropriate warn-
ing signs.
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 in continuous op-
eration, a bypass is available,
• 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 (P2.4C only) is cor-
rectly installed and undamaged,
• depending on the operating mode, the necessary pro-
tective and monitoring devices are present and func-
tional (depending on the type of pump, e.g. motor circuit
breaker, manometer, flame arrestor, temperature monit-
oring).
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 pump-
ing of gaseous media. It is not suitable for liquids.
The sample gas pump should be operated without pre-com-
pression. A preliminary pressure of more than 0.5 bar is not
permitted. The gas outlet must not be shut.
The sample gas pump should be operated without pre-com-
pression. A preliminary pressure of more than 0.5 bar is not
permitted. The gas outlet must not be shut. The flow rate
must be at least 50 l/h. In the event of throttling under 150 l/
h in continuous operation, the flow rate must be regulated
via a bypass. In this case you should choose a version with by-
pass 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!
6 Maintenance
Always observe the applicable safety- and operating regula-
tions when performing any type of maintenance. Please refer
to the original operator’s manual on the included CD or on-
line at www.buehler-technologies.com for maintenance in-
formation.
7 Service and Repair
Please refer to the original operator’s manual on the included
CD or online at www.buehler-technologies.com for a detailed
description of the unit including information on
troubleshooting and repair.
13
Bühler Technologies GmbH
BX420022 ◦ 08/2018
