Appendix
en
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 22, 28-1, 30-1, 40-1, Wilo-Flumen EXCEL-TRE 20, 30, 40
81
13.3
Ex rating
This section contains further information on the operation of the mixer in an explosive
atmosphere. All personnel must read this section.
This section applies only to Ex-rated
mixers!
13.3.1
Identification of Ex-rated mixers
For use in explosive atmospheres, the mixer 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)
ƒ
Flameproof enclosures (CSA-EX)
In order to limit the surface temperature, the motor must be equipped with at least one
temperature limiter (1‑circuit temperature monitoring). It may also be equipped with a
temperature controller (2‑circuit temperature monitoring).
13.3.3
Intended use
ATEX approval
The mixers are suitable for operation in potentially explosive atmospheres:
ƒ
Device group: II
ƒ
Category: 2, zone 1 and zone 2
Mixers must not be used in zone 0!
FM approval
The mixers 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.
CSA Ex rating
The mixers are suitable for operation in potentially explosive atmospheres:
ƒ
Protection class: Explosion-proof
ƒ
Category: Class 1Division 1
13.3.4
Electrical connection
DANGER
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death due to electric
shock!
• Electrical work must be carried out by a qualified electrician!
• Observe local regulations!
ƒ
Always connect the mixer to an electrical outlet outside the explosive area. If the
connection has to be made within the explosive area, then the connection must be
carried out in an Ex-rated housing (ignition protection class according to
DIN EN 60079‑0)! Non-compliance will lead to a risk of fatal injury from explosion!
The connection must always be carried out by a qualified electrician.
ƒ
All monitoring devices outside the “spark-proof areas” must be connected via an in-
trinsically safe circuit (e.g. Ex-i relay XR-4...).
ƒ
The voltage tolerance may not be higher than max. ±10 %.
Overview of possible monitoring devices for submersible mixers
with Ex rating
:
