Grundfos SE Installation And Operating Instructions Manual page 10

Directive or
Code
standard
Ex
db
h
II
B
Harmonised
European EN
and IECEx
T4, T3*
standards
Gb
IP68
X
*When operated by a frequency converter.
2.5.2 Ex certification and classification
Explosion-proof pumps are approved by FM
Approvals in conformity with the essential health and
safety requirements relating to the design and
construction of equipment intended for use in
potentially explosive atmospheres given in Annex II to
the Council Directive 2014/34/EU(ATEX).
2.5.3 Potentially explosive environments
Use explosion-proof pumps for applications in
potentially explosive environments.
The pump must not be used to pump
explosive, flammable or combustible
liquids.
The classification of the installation site
must comply with the local regulations.
10
Description
= Marking of explosion protection.
= Flame proof enclosure according to EN/IEC 60079-1.
= Non-electrical equipment for explosive atmosphere.
= Suitable for use in explosive atmospheres (not mines).
Classification of gases, see EN/IEC 60079-0, Annex A. Gas group B includes
=
gas group A.
T3* = maximum surface temperature of the motor is 200 °C according to
EN/IEC 60079-0.
=
T4 = maximum surface temperature of the motor is 135 °C according to
EN/IEC 60079-0.
= Equipment for explosive gas with "high" level of protection.
= Enclosure class according to EN/IEC 60529.
The letter X in the certificate number indicates that the equipment is subject
= to special conditions for safe use. The conditions are described in the
certificate and the installation and operating instructions.
Special conditions for safe use of
explosion-proof pumps:
1. Make sure the moisture- and thermal
switches are connected in two
separate circuits and have separate
alarm outputs (motor stop) in case of
high humidity or high temperature in
the motor.
2. Bolts used for replacement must be
class A4-80 or A2-80 according to
EN/ISO 3506-1.
3. Contact the manufacturer if
dimensional information on the
flameproof joints is necessary.
4. During operation, the cooling jacket, if
fitted, must be filled with cooling liquid.
5. The level of the pumped liquid must be
controlled by level switches connected
to the motor control circuit.
6. Dry running is not allowed.
7. Make sure the cable is mechanically
protected, attached to the switchboard
and the cable bonding cannot slip out.
8. The sewage pumps have an ambient
temperature range of -20 to +40 °C
and a maximum operating temperature
of +40 °C.
9. Avoid exposing the ethylene-propylene
rubber insulated cables to direct
sunlight.
10. Dry-installed pumps often have a
higher temperature in the cable entries
than submerged pumps. This may
reduce the lifetime of the Ex-protection.
According to IEC/EN 60079-14, it is a