Bühler technologies P2.2 Atex Notice De Montage page 12

P2.x ATEX
The supply line and earthing cross-sections must be aligned
with the rated current. Use a minimum line cross-section of
2
1.5 mm .
Be sure to connect the following protective earth terminals to
your on-site earth conductor per local regulations:
• Protective earth terminal inside the motor terminal box.
• Protective earth terminal on the outside of the motor
housing.
• Protective earth terminal on the mounting bracket. (The
earth bolt on the mounting bracket may alternatively be
connected to the protective earth connection on the out-
side of the motor housing via cable bridge.)
Stray electric currents may not flow through this connection.
No foreign objects, contaminants or moisture may be inside
the junction box. Any unused cable gland openings must be
sealed with plugs approved for the application (if necessary
Atex, IECEx).
To maintain the IP rating specified by the manufacturer,
when sealing the terminal box with the cover ensure the ori-
ginal seal is correctly seated and tighten the bolts at 5 Nm.
Be sure to observe any varying information in the rating plate.
The conditions at the site must correspond with all rating
plate information.
Three-phase motors Three-phase motors
Delta connection star connection
lower voltage higher voltage
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
DANGER
Danger of explosions, danger of poisoning from poison-
ous corrosive gases
During maintenance work, depending on the medium used,
explosive and/or poisonous corrosive gases could escape, and
this could lead to a danger of explosion or could be hazardous
to health.
a) Inspect the leak tightness of your sampling system before
putting the device into operation.
b) Ensure that gases that are hazardous to health are dis-
charged safely.
c) Turn off the gas supply before beginning any mainten-
ance or repair work and flush the gas lines with inert gas
or air. Secure the gas supply so that it cannot be turned
on unintentionally.
d) Protect yourself during maintenance from poisonous /
corrosive gases. Wear appropriate protective equipment.
12 Bühler Technologies GmbH
Adiabatic compression (explosion hazard)!
In case of adiabatic compression, high gas temperatures may
occur. The operator is responsible to consider this situation.
Make sure to obey the allowed technical specifications and
ambient conditions (see data sheet), take special attention to
the media temperature with respect to temperature class T3
or T4. These vary in addition to gas composition and ambient
conditions. Where necessary, the operator must install tem-
perature sensors for monitoring and must automatically shut
down the sample gas pump should the temperature exceed
the limits.
Dangerous electrostatic charging (explosion hazard)
Conveying e.g. very dry and particle-laden gasses may result
in incendive electrostatic charges inside the bellow / pump
body.
Please install a particle-filter with suitable grade of filtration
before the gas input of the pump.
Removing explosive gaseous mediums (max. from zone 1)
with pump P2.x Atex is prohibited if the gas flow results in an
incendive electrostatic charge in the bellow / pump body
(projected surface inside the bellow / pump body ~ 15 cm
AC motors
with
Hot surface
operating capacitor
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 device, ensure that:
• the hose and electrical connections are undamaged and
• no parts of the sample gas pump have been dismantled
• the gas inlet and outlet of the sample gas pump is not
• the preliminary pressure is under 0.5 bar,
• in the event of throttling under 150 l/h (P2.x Atex) or un-
• the ambient parameters are complied with,
• information on rating plates is observed,
• the voltage and frequency of the motor correspond to
• the electrical connections are tightly fastened and the
• air inlet openings and cooling surfaces are clean,
• protective measures have been carried out; earthing!
DANGER
DANGER
CAUTION
correctly installed,
(e.g. cover),
shut,
der 400 l/h (P2.7x Atex) in continuous operation, a bypass
is available,
those of the network,
monitoring devices have been connected and configured
correctly!
2
).
BX420002 ◦ 04/2021