Wilo HC 20.1 + EMU FA Serie Manual De Instrucciones página 193

13.3 Ex rating
13.3.1 Identification of Ex-rated pumps
13.3.2 Protection class
13.3.3 Intended use
Installation and operating instructions Wilo Motor HC 20.1 + EMU FA, Rexa SUPRA, Rexa SOLID
Appendix
▪ In the event of a fault on the internal sealing chamber control, use the external double-
rod electrode.
The following construction measures can also help to reduce or prevent faults:
▪ Separate power supply cables for the main and control cable (depending on the motor
size).
▪ When laying, ensure there is adequate clearance between the main and control cable.
▪ Using shielded power supply cables.
Summary
▪ Continuous duty up to rated frequency (50 Hz or 60 Hz), observing the minimum flow
velocity.
▪ Observe additional measures with regard to EMC regulations (choice of frequency con-
verter, using filters, etc.).
▪ Never exceed the rated current or rated speed of the motor.
▪ It must be possible to connect the motor's own temperature monitoring (bimetallic
strip or PTC sensor).
This section contains further information on the operation of the pump in an explosive
atmosphere. All personnel must read this section. This section applies only to Ex-rated
pumps!
For use in explosive atmospheres, the pump must be marked as follows on the rating
plate:
▪ "Ex" symbol of the corresponding approval
▪ Ex classification
▪ Certification number (depending on the approval)
The certification number, if required by the approval, is printed on the rating plate.
The motor's design version corresponds to the following protection classes:
▪ Flameproof enclosure (ATEX)
▪ Explosionproof (FM)
In order to limit the surface temperature, the motor must be equipped with a temper-
ature limiter (1-circuit temperature monitoring).
DANGER
Explosion due to pumping of explosive fluids!
Pumping of highly flammable and explosive fluids (gasoline, kerosene, etc.) in pure
form is strictly prohibited. There is a risk of fatal injury due to explosion! The pumps
are not designed for these fluids.
ATEX approval
The pumps are suitable for operation in potentially explosive atmospheres:
▪ Device group: II
▪ Category: 2, zone 1 and zone 2
These pumps must not be used in zone 0!
FM approval
The pumps are suitable for operation in potentially explosive atmospheres:
▪ Protection class: Explosionproof
▪ Category: Class I, Division 1
Notice: If the cabling is carried out according to Division 1, installation in Class I, Divi-
sion 2 is also permitted.
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