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Installation and operating instructions • Wilo-Rexa PRO-S • Ed.01/2022-03
–
Permanent magnet motors: 30 Hz up to the stated maximum frequency as per rating
plate
NOTICE! The maximum frequency may be below 50 Hz!
–
Comply with the minimum flow velocity!
•
Observe additional measures with regard to EMC regulations (choice of frequency con-
verter, using filters, etc.).
•
Do not exceed the rated current or rated speed of the motor.
•
Connection for bimetallic strip or PTC sensor.
13.3
Ex rating
This section contains further information on the operation of the pump in an explosive at-
mosphere. All personnel must read this section.
This section applies only to Ex-rated
pumps!
13.3.1
Identification of Ex-rated pumps
The pump is labelled as follows on the rating plate for use in explosive atmospheres:
•
“Ex” symbol of the corresponding approval
•
Ex classification
•
Certification number (depending on the approval)
If required by the approval, the certification number is printed on the rating plate.
13.3.2
Protection class
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 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
IECEx certification
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!
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, Division
2 is also permitted.
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!
•
Always connect the pump to an electrical outlet outside the explosive area. If the con-
nection must 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-observance may lead to fatal injury due to explosion! Connection must always be
carried out by a qualified electrician.
•
All monitoring devices outside the “spark-proof areas” must be connected via an in-
trinsically safe circuit (e.g. Ex-i relay XR-4...).
