Before Switching On; Switching On And Off - Wilo Rexa PRO Notice De Montage Et De Mise En Service

7.5

Before switching on

7.6

Switching on and off

Installation and operating instructions Wilo-Rexa PRO
Commissioning
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?
– Mechanical components attached correctly?
▪ Check level control:
– Float switches can move freely?
– Switching level tested (pump on, pump off, minimum water level)?
– Additional dry-running protection installed?
▪ Test operating conditions:
– Min./max. temperature of the fluid tested?
– Max. immersion depth tested?
– Operating mode defined depending on the minimum water level?
– Maximum switching frequency adhered to?
▪ Check installation location/operating space:
– Pipe system on the pressure side free of deposits?
– Inlet or pump sump cleaned or free of deposits?
– All gate valves open?
– Minimum water level defined and monitored?
The hydraulics housing must be filled completely with the fluid and there must be no
air cushions in the hydraulics. NOTICE! Provide suitable venting devices if there is a
risk of air cushions being formed in the system!
During the start process, the rated current is temporarily exceeded. During operation,
the rated current may no longer be exceeded. CAUTION! If the pump does not start,
switch off the pump immediately. Remove the fault before reactivating the pump!
Place pumps which are installed as portable pumps on a firm surface so they are level. If
pumps have fallen over, place them upright again before activating them. Securely at-
tach the pump with screws in case of difficult surfaces.
Pumps with free cable end
The pump must be switched on and off using a separate operating point (on/off switch,
switchgear) provided by the customer.
Pump with attached plug
▪ Three-phase current version: After inserting the plug into the socket, the pump is ready
for operation. The pump is switched on and off with the ON/OFF switch.
Pump with attached float switch and plug
▪ Three-phase current version: After inserting the plug into the socket, the pump is ready
for operation. The pump is controlled via two switches on the plug:
– MANUAL/AUTO: Determines if the pump is switched on and off directly (MANUAL) or
depending on the fill level (AUTO).
– ON/OFF: Switch pump on and off.
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