Bühler technologies P2. AMEX Serie Guía Rápida página 15

P2.x AMEX
4.5 Electrical connections
WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
WARNING
Inverter operation is forbidden!
WARNING
Regard National directives concerning installation and opera-
tion of electrical devices in hazardous areas when installing
and commissioning the motor (e. g. EN 60079-14).
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
Only operate the unit with the factory-installed motor. The
user must not exchange the unit or replace it with a different
motor.
The sample gas pump must be protected against prohibited
heating with suitable overload protection (protective motor
switch following approval).
Please note the rated current for the protective switch set-
tings (see motor type plate).
Verify that the pump motor has the correct voltage and fre-
quency: Voltage tolerance ±5 %, frequency tolerance ±2 % –
from rated value.
Properly connect the sample gas pump as shown in the corres-
ponding wiring diagram (see below). If the wiring diagram in-
side the cover of the terminal box is different, consult that in-
stead.
The terminal box has a Ø22 mm bore for installing a 1/2" NPT
cable fitting as per NEC Standard requirements. Ensure the
connecting cable has adequate strain relief.
The supply line and earth cross-sections must be adjusted to
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 in line with local regulations:
• Protective earth terminal inside the motor terminal box.
• Protective earth terminal on the mounting bracket.
Stray electrical currents must not be allowed to flow through
this connection.
There must be no foreign objects, contaminants, or moisture
inside the junction box.
To maintain the IP rating specified by the manufacturer, en-
sure that the original seal is correctly seated and tighten the
bolts at 1.6–2 Nm when sealing the terminal box with the
cover.
Be sure to observe any deviating information on the rating
plate. The conditions at the site must correspond with all rat-
ing plate information.
BX420003 ◦ 02/2024
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 (see data sheet), take special attention to
the media temperature with respect to temperature class T3
or T3C. These vary in addition to gas composition and ambi-
ent conditions. Where necessary, the operator must install
temperature sensors for monitoring and must automatically
shut down the sample gas pump should the temperature ex-
ceed the limits.
DANGER
Dangerous electrostatic charge (explosion hazard)
Transporting materials such as very dry, particle-loaded gases
can cause incendive electrostatic charges in the bellow /
pump body.
Install particle filtration with the appropriate fineness up-
stream from the pump gas input. For the P2.x AMEX-O2 ver-
sions in particular, we recommend a filter fineness of <10 µm.
Bühler Technologies GmbH 15