Switching On The Sample Gas Pump; Operating The Sample Gas Pump - Bühler technologies P2.2/P2.82 AMEX Manual Del Usuario

P2.x AMEX
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.

5.1 Switching on the sample gas pump

Before switching on the unit, check:
• the hose- and electrical connections are not damaged and
correct installed.
• no parts of the sample gas pump have been removed (e.g.
cover).
• the gas inlet and outlet of the sample gas pump are not
closed.
• the pre-pressure is below 0.5 bar.
• a bypass is installed for continuous operation for throt-
tling below 150 L/h (P2.x Amex) or 400 L/h (P2.8x Amex).
• ambient parameters are met.
• rating plate information is observed.
• the voltage and frequency of the motor match the mains
values.
• electrical connections are securely connected and monit-
oring devices are connected and set correctly!
• air inlets and cooling surfaces are clean.
• precautions have been taken; earthing!
• the motor is properly secured!
• the junction box cover is closed and the cable glands
sealed properly.
• the elastomer ring gear on the coupling (only P2.4 Amex/
P2.84 Amex) is mounted correctly and undamaged.
• the necessary safety and monitoring devices, depending
on the application, are installed and functional (e.g. pro-
tective motor switch, pressure gauge, flame arrester, tem-
perature monitor, depending on pump type).
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.
BX420003 ◦ 08/2021

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
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 continuous operation, the flow rate must be regu-
lated 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 dam-
aged! The turning range of the valve is around seven rota-
tions.
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 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.
Bühler Technologies GmbH 13