Operation In An Explosive Atmosphere; Before Switching On; Switch On And Off - Wilo -Flumen EXCEL-TRE 20 Installation And Operating Instructions Manual

en
7.4 Operation in an explosive atmo-
sphere
Approval according to
ATEX
FM
CSA-Ex
7.5

Before switching on

7.6

Switch on and off

66
Commissioning
o o o
o o o
o − o
Legend
− = not available/possible, o = optional, • = standard
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
For the relevant requirements, refer to the explosion protection chapter in the ap-
pendix of these installation and operating instructions!
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.
Check the following prior to activation:
ƒ
Has the electrical connection been carried out in accordance with regulations?
ƒ
Has the connection cable been routed safely?
ƒ
Can the float switch move freely?
ƒ
Accessories attached correctly?
ƒ
Temperature of the pumped fluid observed?
ƒ
Immersion depth observed?
ƒ
Intermittent operation: Is the max. switching frequency complied with?
ƒ
Has the minimum water level above the propeller been defined and monitored?
ƒ
Min. fluid temperature can drop below 3 °C: Monitoring device with automatic deac-
tivation installed?
ƒ
No installations within the direct rotary range of the propeller?
The mixer must switch on and off using a separate operating point (on/off switch,
switchgear) set by the customer.
ƒ
When the mixer starts, the rated current is exceeded for a short time.
ƒ
Current consumption continues to be slightly above the rated current during the
start-up phase, until the flow in the basin increases.
ƒ
During operation, do not exceed the rated current any more.
CAUTION! Material damage! If the mixer does not start up, switch it off immediately.
Motor failure! Remove the fault first before reactivation.
o o o
o o o
o o −
o o
o o
o −
WILO SE 2021-10