Explosion Hazard - Bühler technologies P1.2 Notice De Montage

P1.2, P1.2E
P1.2 115V/230V
AC
protective earth
Fig. 2: Electrical connections P1.2 pumps
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.
DANGER
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, take special attention to the media tem-
perature with respect to temperature class T4. These vary in
addition to gas composition and ambient conditions. Where
necessary, the operator must install temperature sensors for
monitoring and must automatically shut down the sample
gas pump should the temperature exceed the limits.
DANGER
Dangerous electrostatic charge (explosion hazard)
Conveying e.g. very dry and particle-loaded gasses can result
in incendive electrostatic charges in the bellow / pump body.
Install particle filtration with an appropriately fine filter
ahead of the pump gas input.
Sampling explosive gaseous media (max. zone 2) with P1.2 /
P1.2E pumps is prohibited if the gas flow results in an in-
cendive electrostatic charge in the bellow / pump body (pro-
jected surface in the bellow / pump body ~ 9 cm
12 Bühler Technologies GmbH
P1.2E 115V/230V
black = AC
green/yellow = protective earth
2
).
DANGER

Explosion hazard

Flammable media fed into the pump may only be heated to a
maximum of 80 % of their respective ignition temperature.
CAUTION
Hot surface
Burning hazard
According to the product type and operation conditions, the
temperature may exceed 50 °C during operation.
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 0.3 bar.
• a bypass is installed for continuous operation for throt-
tling below 150 L/h
• ambient parameters are met.
• data on the rating plate is met.
• the voltage and frequency of the motor match the mains
values.
• electrical connections are securely connected and monit-
oring devices are connected and set as prescribed.
• air inlets and cooling surfaces are clean.
• ventilation slots in the housing cover are not covered or
dirty, but are freely accessible.
• precautions have been taken; earthing!
• the necessary safety and monitoring devices, depending
on the application, are installed and functional (e.g. pro-
tective motor switch, manometer, flame arrester, temper-
ature 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.
BX420021 ◦ 03/2020