2.5 Potentially explosive environments
Use explosion-proof pumps for applications in
potentially explosive environments.
The pumps must under no circumstances
pump combustible or flammable liquids.
The classification of the installation site
must comply with local rules.
Before the first startup and after a long
standstill period, make sure that the pump
is filled with the pumped liquid.
The letter X in the certificate number
indicates that the equipment is subject to
special conditions for safe use. The
conditions are mentioned in the certificate
and in this installation and operating
instructions.
Special conditions for safe use of
explosion-proof pumps:
1. Bolts used for replacement must be
class A2-70 or better according to
EN/ISO 3506-1.
2. The pump must not run dry. The level
of pumped liquid must be controlled by
two stop level switches connected to
the motor control circuit. The pumps
can only be used completely
submerged.
3. Make sure that the cable is securely
connected to the terminal board placed
outside the potentially explosive area.
The power cable plug can only be
disconnected by the manufacturer or
his representative.
4. The thermal protector in the stator
windings has a rated cut-out
temperature of 150 °C ensuring the
disconnection of the power supply. The
power supply must be reset manually.
5. The IP68 rating is limited to a
maximum of 10 m submersion depth.
6. The temperature range is limited to -20
to +40 °C for ambient temperature and
0-40 °C for liquids.
7. Contact the manufacturer regarding
the "d" protection type for pumps and
for information on the dimensions of
the flameproof joints.
8. The lock nut of the cable connector
must only be replaced with an identical
one.
9. Compliance with the standards EN
60079-14, EN 60079-17, and EN
60079-19 is a customer responsibility.
9
English (GB)
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