Explosion Hazard - Bühler technologies P2.3C Notice De Montage

P2.3C, P2.4C
Verify the pump motor has the correct voltage and frequency:
Voltage tolerance ±5 %, frequency tolerance ±1 % - from rated
value.
Properly connect the sample gas pump per the respective wir-
ing diagram (see below). If the wiring diagram inside the
cover of the terminal box is different, observe that instead.
The required tightening torque for the nuts on the terminal
board is 1.5 Nm.
Ensure the connecting cable has adequate cable relief. The
clamping area of the cable gland is 6-10 mm. The required
tightening torque for the cable gland is 5 Nm.
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 appropriately tighten the
bolts.
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
BX420022 ◦ 10/2021
5 Operation and control
The device must not be operated beyond its specifications.
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
b) Ensure that gases that are hazardous to health are dis-
c) Turn off the gas supply before beginning any mainten-
d) Protect yourself during maintenance from poisonous /
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.
Dangerous electro-static charge (danger of explosion)
AC motors
During the pumping of, for instance, very dry gases or gases
with
contaminated with particulate matter, potentially incendiary
operating capacitor
electro-static charges could build up in the bellow / pump
body.
Provide the pump with a particle filtration with a suitable fil-
ter unit placed before the pump gas inlet.
The extraction of explosive gaseous media (max. zone 2) with
the pumps is not permitted if the gas flow leads to a poten-
tially incendiary electro-static charge in the bellow / pump
body (projected surface area in bellow / pump body ~ 15 cm

Explosion hazard

Flammable media fed into the pump may only be heated to a
maximum of 80 % of their respective ignition temperature.
NOTICE
DANGER
putting the device into operation.
charged safely.
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.
corrosive gases. Wear appropriate protective equipment.
DANGER
DANGER
DANGER
2
).
Bühler Technologies GmbH 13