en
Installation and operating instructions • Wilo-Rexa FIT-S • Ed.01/2022-03
15
•
Check
the direction of rotation.
Check the rotating field at the mains connection with a rotat-
ing-field testing device.
•
Correct
the direction of rotation.
If the direction of rotation is incorrect, change the connection
as follows:
–
Direct starting: swap two phases.
–
Star-delta starting: Swap the connections of two windings
(e.g. U1/V1 and U2/V2).
7.4
Before switching on
Check the following prior to activation:
•
Has the electrical connection been carried out in accordance
with regulations?
•
Has the connection cable been routed safely?
•
Can the float switch move freely?
•
Accessories attached correctly?
•
Temperature of the pumped fluid observed?
•
Immersion depth observed?
•
Are the pressure pipe and pump sump free of deposits?
•
All gate valves in the pressure pipe open?
•
Are ventilation systems present in the pressure pipe?
Air pockets in the pump and in the pressure pipe can lead to de-
livery problems.
7.5
Switching on and off
•
When the pump starts, the rated current is exceeded for a short
time.
•
During operation, do not exceed the rated current any more.
CAUTION! Material damage! If the pump does not start, switch
off the pump immediately. Motor failure! Remove the fault first
before reactivation.
Observe the following points for transportable installation:
•
Place the pump on a firm bearing surface. Avoid sinking!
•
If the pump has fallen over, place it upright again before activ-
ating it.
•
If the pump “moves away”, screw the pump to the ground.
Pump with attached float switch and plug
•
Single-phase AC version (1~ motor)
Insert the plug into the socket, the pump is ready for operation.
The pump is controlled via two switches on the capacitor box:
–
HAND/AUTO: Set the operating mode.
HAND: Switch the pump on and off manually. AUTO: Switch
the pump on and off automatically depending on the fill
level.
–
ON/OFF: Switch the pump on and off in operating mode
“HAND”.
Pump with attached plug
•
Single-phase AC version (1~ motor):
Insert the plug into the socket, the pump is ready for operation.
Switch the pump on and off with the ON/OFF switch on the ca-
pacitor switchgear.
Pump with bare cable end
The pump is switched on and off using a separate operating point
(on/off switch, switchgear) provided by the customer.
7.6
During operation
WARNING
Risk of injury from rotating components!
No persons are allowed to be present in the working
area of the pump. There is a risk of injury!
• Demarcate and cordon off the working area.
• If there are no persons in the working area, activ-
ate the pump.
• If persons enter the working area, switch off the
pump immediately.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns.
• Allow the pump to cool down at ambient tem-
perature after switching it off!
CAUTION
Do not allow the pump to dry run!
Dry running of the pump is prohibited. When the
minimum delivery level is reached, switch off the
pump. Dry running may destroy the seal and cause
the pump to be irreparably damaged.
NOTICE
Cleaning cloths and wipes can cause clogging
in the macerator!
To prevent cleaning cloths and wipes in the fluid,
mechanically pre-clean the incoming fluid.
NOTICE
Pumping problems due to water level being
too low
The hydraulics are self-venting. Smaller air cushions
are resorbed during pumping. If the fluid is lowered
too much, separation of the volume flow may occur.
The minimum permissible water level must reach the
upper edge of the hydraulics housing!
Please regularly check the following points:
•
Inlet quantity corresponds to the pump delivery rate.
•
The level control device and dry-running protection work cor-
rectly.
•
Minimum water submersion ensured.
•
Connection cable is not damaged.
•
Pump free from deposits and encrustations.
•
No air intake in the pumped fluid.
•
All gate valves open.
•
Quiet and low-vibration running.
•
Max. switching frequency not exceeded.
