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Installation and operating instructions • Wilo-Rexa MINI3-V05...-AU • Ed.01/2022-01
11
10.2
Oil change
1
Fig. 3: Sealing chamber oil change
1
Screw plug sealing chamber
✓
Wear protective gloves!
✓
Pump is removed, cleaned and if necessary disinfected.
✓
Oil-resistant sealable collector tank is accessible.
1.
Position the pump horizontally on a firm surface. The screw
plug is on top.
WARNING! Risk of hands being crushed. Make
sure that the pump cannot fall over or slip!
2.
Unscrew the screw plug slowly.
3.
Place a collector tank underneath the pump.
4.
Draining the oil: rotate the pump until the opening points
downwards.
5.
Checking the oil: notify customer service if the oil contains
metal swarf!
6.
Rotate the pump until the opening points upwards again.
7.
Filling the oil: fill in the oil through the opening.
⇒
Comply with requirements concerning oil type and quant-
ity!
8.
Clean the screw plug, replace the seal ring with a new one, and
fully screw it in.
10.3
General overhaul
General overhaul of the pump after 1,500 operating hours by cus-
tomer service. All components are checked for wear and damaged
components are replaced.
11
Faults, causes and remedies
Pump not starting or switches off after a short time.
1.
Interrupted power supply
⇒
Check the electrical connection of the pump.
⇒
Check fuses/residual-current devices by a qualified electri-
cian.
2.
Thermal motor monitoring tripped.
⇒
Cool down the pump. The pump starts automatically.
⇒
Pump switches On/Off too frequently. Check the cable
length of the float switch.
⇒
Excessive fluid temperature. Check the temperature. If ne-
cessary, use a different pump.
3.
Suction port/strainer/impeller silted/clogged.
⇒
Shut down the pump, remove it and clean it.
4.
Float switch not operational.
⇒
The float switch must be able to move freely.
Pump starts up, but does not supply fluid.
1.
Pressure pipe/discharge port clogged.
⇒
Flush out the pressure pipe.
⇒
Flush out the pressure hose.
⇒
Remove any kinks in the pressure hose.
2.
Swing check valve contaminated.
⇒
Shut down the pump, remove it and clean the discharge
port.
⇒
Replace faulty swing check valve.
3.
Water level too low.
⇒
Check inlet.
⇒
Pump is pumping at a too low level. Check the cable length
of the float switch.
4.
Suction port/strainer silted/clogged.
⇒
Shut down the pump, remove it and clean it.
5.
Air in the pump/pressure pipe.
⇒
To escape the air, position the pump at a slight angle.
⇒
Install a bleed unit in the pressure pipe.
Delivery rate drops while the pump is running.
1.
Pressure pipe/discharge port clogged
⇒
Flush out the pressure pipe.
⇒
Flush out the pressure hose.
⇒
Remove any kinks in the pressure hose.
2.
Suction port/strainer silted/clogged
⇒
Shut down the pump, remove it and clean it.
3.
Air in the pump/pressure pipe
⇒
To escape the air, position the pump at a slight angle.
⇒
Install a bleed unit in the pressure pipe.
4.
Signs of wear
⇒
Contact customer service.
Customer service
If the points listed here do not rectify the fault, contact customer
service. Costs may be incurred when using customer service sup-
port! Contact customer services for more information.
12
Disposal
12.1
Information on the collection of used electrical and
electronic products
Proper disposal and appropriate recycling of this product avoid en-
vironmental damage and dangers to your personal health.
NOTICE
Do not dispose in domestic waste!
This symbol means do not dispose the electrical and
electronic product in domestic waste. The symbol is
included on the product, the packaging, or the ac-
companying documentation.
Note the following points for proper handling, recycling, and dis-
posal of the product:
