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pump can be operated properly on this connec-
tion; relevant information is to be obtained from
the local electricity company (EVU) and the pump
manufacturer.
8 Starting-up
WARNING! Risk of injury!
Danger – rotating cutter! First switch off the
pump!
CAUTION! Risk of damage to the pump!
Prior to starting up the pump, the shaft and the
intake pipes should be freed from solid matter
such as rubbish.
8.1 Direction of rotation (only for three-phase
motors)
The correct direction of rotation must be tested
before the pump is submerged. This is indicated
by the arrow showing the direction of rotation on
the pump housing.
• Hang the pump in the hoist.
• Briefly switch on the pump. The pump will move in
the opposite direction to the motor (arrow on
housing).
• If the direction of rotation is incorrect, 2 phases of
the mains connection must be exchanged.
8.2 Adjusting the control level
Adjusting the control level: see instructions for
assembly and installation of the control level.
CAUTION! Risk of damage to the pump!
Dry running destroys the mechanical seal.
The pump must not be allowed to run dry and to
suck any air.
The "OFF" position (H
depends on the pump type and/or the operating
mode (Fig. 1, 2, 3).
Type of operation: S1, S3
Pump
H
[mm]
min
MTS 40/...
467
MTS 40 E
500
The "ON" position should be set to the desired
maximum level but should nevertheless remain
below the intake pipe in the shaft.
8.3 Operating conditions in potentially explosive
locations
See additional instructions for operation for in
potentially explosive locations.
Installation and operating instructions Wilo-Drain MTS 40
) of the level control
min
9 Maintenance
Maintenance and repair work should only be
carried out by qualified personnel!
DANGER! Risk of asphyxiation!
Shafts for wastewater submersible motor-
driven pumps may contain wastewater with
toxic and/or harmful substances.
• For reasons of safety, maintenance work should
only be carried out in the presence of another
person.
• The pump shaft must be properly ventilated
before any work takes place.
WARNING! Risk of infection!
In order to avoid any risk of infection, mainte-
nance work should only be carried out using
appropriate protective clothing (protective
gloves).
WARNING! Risk of electric shock!
Potential dangers caused by electrical energy
must be excluded.
• The pump must be switched off for all repair
work and secured against unauthorised opera-
tion.
• In principle, damage to the connecting cable
should only be repaired by a qualified electri-
cian.
Checking and cleaning the pump:
• The lifetime of the pump depends on the operat-
ing conditions and consequently varies greatly.
The pump should be inspected at regular intervals.
In the case of increasing operating noise, vibra-
tions in the pipework or a drop in conveying
capacity, the impeller, with built-in cutter, must
be checked for obstructions caused by solid mat-
ter and wear.
Cleaning:
• Remove coarse impurities from the cutter's inlet
channels.
• Next, rinse out the cutter's inlet channels. Rinse
the pump housing via the discharge side until no
more impurities emerge from the cutter's inlet
channels.
• Check the cutter's blade clearance: Visually check
the cutting edges for damage such as scoring,
broken-off parts and the like. Check the blade
clearance using a 0.1mm feeler gauge. If the blade
is damaged or the clearance has increased
(>0.1mm) due to wear, please contact a specialist
dealer or the nearest Wilo customer service centre
or representative.
• Restart the pump.
Protection against frost:
• If it cannot be ensured that the flow medium in the
pump will not freeze, the pump should be pro-
tected against frost.
We would recommend that the pump be main-
tained and checked thoroughly by Wilo customer
services once every six months.
Maintenance shall be carried out in accordance
with EN12056 Part 4.
English
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