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WILO SE 04/2012
• If the direction of rotation is incorrect, swap two mains
connection conductors.
8.2 Setting the level control device
Setting the level control device: See the installation and
operating instructions for the level control device.
8.2.1 “On ” switching point
The “On” switching point should be adapted to the desired
maximum level, it must, however, be below the inlet line
in the sump.
8.2.2 “Off” switching point
The “Off” switching point (H
min
, Fig. 1, 2, 3) of the level
control device depends on the type of pump and the
operating mode.
Operating mode S2 and S3
H
min
: 8.3 in (210 mm)
Operating mode S1
8.3 Operating conditions in a potentially explosive
environment
See supplementary operating instructions for FM prod-
ucts.
8.4 Operation with frequency converter
The unit is not approved for operation on a frequency
converter.
9 Maintenance
Maintenance and repairs may only be carried out by
qualified experts!
It is recommended to have the pump serviced and
checked by WILO Customer Service every six months.
Carry out maintenance as per EN12056 Part 4.
9.1 Checking and cleaning the pump
The pump service life depends on the operating condi-
tions and therefore differs. The pump should be checked
at regular intervals. If you notice an increase in operat-
ing noise, vibrations in the pipe system or diminishing
output, check the impeller with integrated macerator
for solid material clogging and wear.
9.1.1 Cleaning
• Remove coarse contamination from the intake channels
of the macerator.
• Then rinse out the intake channels of the macerator.
Rinse out the pump housing via the pressure port until
no more contamination comes out of the intake chan-
nels of the macerator.
• Check the cutting gap of the macerator:
• visually check the cutting edges for damage such as
grooves, chunking, etc.
• check the cutting gap using a feeler gauge (0.1 mm).
• If the blade is damage, or if the cutting gap is enlarged
due to wear (>0.1 mm), please consult a specialist
technician or the nearest WILO after-sales service
point or representative.
• Restart the pump.
9.2 Frost protection:
• The pump must be protected against frost if it is not
possible to guarantee that the fluid will not freeze in the
pump.
CAUTION! Danger of damage to the pump!
Dry running will destroy the mechanical seal. The
pump must not run dry and suck in air.
Pump type
H
min
Inch
mm
MTS 40/95 (1~230 V)
18.3
464
MTS 40/95
MTS 40/120
19.1
484
MTS 40/143
MTS 40/165
20.6
524
MTS 40E95…
MTS 40E120…
19.6
499
MTS 40E143…
MTS 40E165…
20.6
524
DANGER! Danger of suffocation
Sumps for submersible sewage pumps can contain
sewage with substances which are toxic and/or
harmful to health.
• For safety reasons, maintenance work in the pump
sump must be carried out with another person pres-
ent.
• Prior to beginning work, the pump sump is to be
ventilated sufficiently.
WARNING! Risk of infection!
All maintenance must be carried out wearing suit-
able protective clothing (protective gloves) in order
to prevent the risk of infection.
WARNING! Danger of electric shock!
Any danger from electrical current should be ruled out.
• The pump should be electrically isolated and
secured against unauthorized switch-on during any
maintenance or repair work.
• Any damage to the connecting cable should always
be rectified by a qualified electrician only.
Содержание Drain MTS 40 Series
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