Wilo Drain MTS 40 Serie Instrucciones De Instalación Y Funcionamiento página 11

8.3 Operating conditions in potentially explosive
locations
See additional instructions
for in potentially explosive locations.
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 electrician.
WARNING! Risk of injury!
Danger - rotating cutter! First switch off the
pump.
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.
Installation and operating instructions Wilo-Drain MTS 40
for operation
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 0.004 in (0.1 mm) feeler gauge.
If the blade is damaged or the clearance has
increased (>0.04 in (0.1 mm)) due to wear, please
contact a specialist dealer or the nearest Wilo cus-
tomer 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 EN 12056 Part 4 or with the applicable local
regulations.
English
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