Direction Of Rotation Check (For Three-Phase Current Motors Only); Before Switching On; Switching On And Off - Wilo EMU FA Notice De Montage Et De Mise En Service

7.3 Direction of rotation check (for
three-phase current motors only)
7.4

Before switching on

7.5

Switching on and off

Installation and operating instructions Wilo-EMU FA + F-Motor
Commissioning
The pump is factory-checked and adjusted to the correct direction of rotation for a
clockwise rotating field. Connection is made in accordance with the specifications in
chapter "Electrical connection".
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.
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 bare 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
▪ 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
▪ After inserting the plug into the socket, the pump is ready for operation. The pump is
controlled via two switches on the plug:
– HAND/AUTO: Determines if the pump is switched on and off directly (HAND) or de-
pending on the fill level (AUTO).
– ON/OFF: Switches the pump on and off.
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