Operation In An Explosive Atmosphere; Before Switching On - Wilo FK 17.1 Instrucciones De Instalación Y Funcionamiento

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7.4 Operation in an explosive atmo-
sphere
ATEX approval
FM approval
CSA-Ex approval
Key: − = not available/possible, o = optional, • = as standard
7.5

Before switching on

176
Commissioning
Direction of rotation check
A qualified electrician checks the rotating field at the mains connection with a rotating
field-test device. For the correct direction of rotation, a clockwise rotating field must
be available at the mains connection. The pump is not approved for operation with a
counter-clockwise rotating field! CAUTION! If the direction of rotation is checked
with a test run, comply with the ambient and operating conditions!
Incorrect direction of rotation
If the direction of rotation is incorrect, change the connection as follows:
▪ Swap two phases for motors with direct starting.
▪ Swap the connections of two windings (e.g. U1/V1 and U2/V2) for star-delta activation
motors.
DANGER
Risk of explosion due to flying sparks in the hydraulics!
During operation the hydraulics must be flooded (completely filled with the fluid). If
the volume flow is interrupted or the hydraulics emerges, air cushions can form in
the hydraulics. If this happens, there is a risk of explosion, e.g. flying sparks due to
static charge! Dry-running protection must ensure that the pump is deactivated at
the appropriate level.
o o −
o o −
− − −
For use in explosive atmospheres, the pump must be marked as follows on the rating
plate:
▪ "Ex" symbol of the corresponding approval
▪ 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 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, Divi-
sion 2 is also permitted.
Check the following prior to activation:
▪ Check whether the device has been installed properly and in accordance with the locally
applicable regulations:
– Has the pump been earthed?
– Layout of power supply cable tested?
– Electrical connection made properly?
− − −
− − −
− − −
−
−
−
WILO SE 2019-01