Monitoring Of Motor Compartment - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

en-US
13.2.3 Intended use
13.2.4 Electrical connection
13.2.4.1 Monitoring of motor compart-
ment
46
Appendix
DANGER
Explosion due to pumping explosive fluids!
Pumping highly flammable and explosive fluids (benzene, kerosene etc.) in their pure
form is strictly forbidden. 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, Division 2 is
also permitted.
DANGER
Electrocution hazard!
Improper conduct when carrying out electrical work causes death due to electric shock!
Electrical work must be carried out by a qualified electrician in accordance with the local
regulations.
▪ Always connect the pump to an electrical outlet outside the explosive area. If the connec-
tion 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 quali-
fied electrician.
▪ All monitoring devices outside the "spark-proof areas" must be connected via an intrinsi-
cally safe circuit (e.g. Ex-i relay XR-4...).
▪ The voltage tolerance may not be higher than max. ±10 %.
Overview of monitoring devices:
Internal monitoring devices
Motor compartment
Motor winding: Temperature limiter
(1-circuit temperature monitoring)
Motor winding: Temperature controller
(2-circuit temperature monitoring)
External monitoring devices
Sealing chamber
Key: - = not available/possible, o = optional, • = as standard
All monitoring devices fitted must be connected at all times!
The connection is made as described in the "Electrical connection" section.
P 13 P 17
• o
• o
o •
o o
WILO SE 2019-02