Hot Surface; Switching On The Sample Gas Pump; Operating The Sample Gas Pump - Bühler technologies P4.3 Guía Rápida

P4.3, P4.83
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
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 warning
signs.
DANGER
Toxic, corrosive gases
The measuring gas led through the equipment can be hazard-
ous when breathing or touching it.
a) Check tightness of the measuring system before putting
it into operation.
b) Take care that harmful gases are exhausted to a save
place.
c) Before maintenance turn off the gas supply and make
sure that it cannot be turned on unintentionally.
d) Protect yourself during maintenance against toxic / cor-
rosive gases. Use suitable protective equipment.

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,
10 Bühler Technologies GmbH
• in the event of throttling under 150 l/h (per head in the
P4.3) or under 400 l/h (per head in the P4.83) in continu-
ous operation, a bypass is available,
• the ambient parameters are complied with,
• information from the identification plate is complied
with,
• the voltage and frequency of the motor correspond to
those of the network,
• the electrical connections are fastened tightly and the
monitoring devices have been connected and set cor-
rectly,
• the 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.
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-com-
pression. A preliminary pressure of more than 0.5 bar is not
permitted. The gas outlet must not be shut. The flow rate per
pump head must be at least 50 l/h for the P4.3 and at least
200 l/h for the P4.83 pumps. In the event of throttling under
150 l/h for the P4.3 or under 400 l/h for the P4.83 pumps in
continuous 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.
The output can be adjusted on pumps with built-in bypass
valve. Do not apply a lot of force when turning the valve as the
valve could otherwise be damaged! The rotation range of the
valve is about 7 rotations.
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 online
at www.buehler-technologies.com for maintenance informa-
tion.
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.
BX420010 ◦ 10/2021