Bühler technologies GAS 222.21 Ex1 Notice De Montage page 17

GAS 222.21 Ex1
4.9.3 Solenoid Valves (Optional)
DANGER
Explosion hazard when opening the solenoid valve
housing
The solenoid valve is a closed system. It must not be removed!
A fuse suitable for the rated current (max. 3 x Ib per
IEC 60127-2-1) or a protective motor switch with short circuit
and fast thermal response (set for rated current) must be con-
nected upstream from each magnet to prevent short-circuits.
• For magnets with a very low rated current, a fuse of the
lowest current value under the IEC standard will suffice.
This fuse must be connected separately, upstream.
• The rated fuse voltage must be equal to or greater than
the specified nominal voltage (U
The fuse rating is specified in the type plate of the solen-
oid valve.
• The limiting breaking capacity of the fuse element must
be equivalent to or greater than the maximum short-cir-
cuit current expected at the installation site (typically
1500 A).
DANGER
Potential equalization/static charge
Static charges can result in incendive sparking.
Avoid static charges. All conductive probe parts must be
earthed!
The housing has a connection for an earth/equipotential
bonding conductor. Ensure the housing is adequately earthed
(minimum conductor cross-section 4 mm
Particularly also observe the requirements of IEC/EN
60079-14!
4.9.4 Limit Switch (Optional)
The optimal limit switch has a separate terminal box with ter-
minals (terminal diagram see "Appendix").
5 Operation and Control
NOTICE
The device must not be operated beyond its specifications.
NOTICE
The weather hood must be closed during operation!
WARNING
Housing or component damage
Never exceed the maximum working pressure and temperat-
ure range of the drive.
DANGER
Explosion hazard due to electrostatic discharge
Equipment may only be used where normal operating condi-
tions do not produce frequent flammable, electrostatic dis-
charge.
BX460047 ◦ 03/2021
+10 %) of the magnet.
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2
).
5.1 Before Startup
Before starting the device, verify:
• The hose and electrical connections and the heating tape
are not damaged and installed correctly.
• No parts of the sample gas probe have been removed.
• The protection and monitoring devices are installed and
functional (e.g. flame arrester).
• The gas inlet and outlet on the gas probe are open.
• Ambient parameters are met.
• Probe parts are resistant to media to be conveyed and in
the surrounding area.
• The performance specifications in the type plate are met.
• The voltage and frequency of the heating tape match the
mains values.
• The electrical connections are tight.
• The monitoring equipment is connected and set as spe-
cified.
• Precautions have been taken.
• The earth is proper and functional.
• The downstream filter and the handle with O-ring are in-
stalled (if applicable).
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 17