Wilo HC 20.1 E3 Series - Ex Rating

en Appendix
46 WILO SE 2019-01
ƒ 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:
ƒ Separate power supply cables for the main and control cable (depending on the mo-
tor size).
ƒ When laying, ensure there is adequate clearance between the main and control
cable.
ƒ Using shielded power supply cables.
Summary
ƒ Continuous duty up to rated frequency (50Hz or 60Hz), observing the minimum
flow velocity.
ƒ Observe additional measures with regard to EMC regulations (choice of frequency
converter, using filters, etc.).
ƒ Never exceed the rated current or rated speed of the motor.
ƒ It must be possible to connect the motor’s own temperature monitoring (bimetallic
strip or PTC sensor).
13.3 Ex rating
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!
13.3.1 Identification of Ex-rated pumps
For use in explosive atmospheres, the pump must be marked as follows on the rating
plate:
ƒ “Ex” symbol of the corresponding approval
ƒ Ex classification
ƒ Certification number (depending on the approval)
The certification number, if required by the approval, is printed on the rating plate.
13.3.2 Protection class
The motor’s design version corresponds to the following protection classes:
ƒ Flameproof enclosure (ATEX)
ƒ Explosionproof (FM)
In order to limit the surface temperature, the motor must be equipped with a temper-
ature limiter (1-circuit temperature monitoring).
13.3.3 Intended use
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:
ƒ Device group: II
ƒ 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:
ƒ Protection class: Explosionproof
ƒ Category: Class I, Division 1
Notice: If the cabling is carried out according to Division 1, installation in Class I, Di-
vision 2 is also permitted.