38
8.3.3 Configuration in MODE 3
External control per frequency (Fig. A5)
• The potentiometer has no function in Mode 3, but
it must nonetheless be set to 100%. The pump is
controlled by an external signal.
Specifications concerning commissioning: see
instruction manual for the pressure boosting
system.
NOTE: In normal operation the state of the leds is
as follows (Fig. A5, ref, 6-7):
9. Maintenance
All servicing must be performed by an author-
ized service representative only!
WARNING! Risk of electrical shock!
Ensure that any electrical hazard is avoided.
Ensure that the power supply is switched off and
secured against unauthorised switching before
performing any work on the electric system.
WARNING! Risk of scalding!
In case of high water temperatures and high sys-
tem pressures, close the insulating valves upstream
and downstream of the pump.
First, allow pump to cool down.
- These pumps are maintenance free. Nevertheless
a regular check is recommended every 15 000
hours.
- In option, mechanical seal could be easily replace
on some models thanks to its cartridge seal
design. Insert its adjusting wedge in its housing
(see Fig. 6) once mechanical seal position is set.
- Always keep the pump perfectly clean.
- Pumps which are not being used during periods
of frost should be drained to avoid damage:
Close the guard valves, open completely the
drain-priming plug and the air bleed screw.
- Service life: 10 years depending on the oper-
ating conditions and whether all requirements
described in the operation manual have been
met.
Status of the LED
Converter live
LED 1 - Red off
LED 2 - Green on
WILO SE 09/2021
English
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