Maintenance - Wilo -Drain TM 32/7 Einbau- Und Betriebsanleitung

ENGLISH
– After the shaft has been filled and the shut-off
valve on the pressure side opened (if available),
the pump starts up automatically if the switching
level "h" is reached and cuts out as soon as the
cut-out level "h1" responds.
ATTENTION! Do not allow the pump to run dry.
– Switching level adjustment of the float switch
The switching level (start-up point) can be altered
via the free float cable by moving the cable within
the retaining eye.
The fault-free operation of the level control is
guaranteed if the data given in table 1.2.2 and
fig. 1 are observed.
A small degree of water penetration (lateral slit
between suction strainer and housing) when level
"h2" is reached is normal and necessary to
ensure the operational safety of the pump.
– Do not direct the jet of water to be fed into the
shaft at the suction strainer of the pump.
Entrained air can prevent the operating pump
from functioning if the vent hole in the housing is
blocked.
– The maximum quantity of water feeding into the
shaft may not exceed the pump's capacity.
Monitor the shaft during commissioning.
– To increase the required capacity (by approx.
16 % of the delivery head) the whirl device system
of the TMW pumps can be shut down as follows
(fig. 2):
– Pull the mains plug,
– Remove pump from the shaft,
– Remove the 4 screws (pos. 2) below the
suction basket,
– Remove the whirl device (pos. 1), rotate by 180°
and secure again with the 4 screws,
– lower pump again and start up.

7. Maintenance

Pull the mains plug before checking
the pump!
The pump is almost maintenance free.
To prevent the pump from becoming blocked due
to long periods of inactivity, its performance
reliability should be checked at regular intervals
(every 2 months) by lifting the float out manually and
running the pump for a short period.
14
A small amount of wear on the shaft sealing ring
and the mechanical seal is unavoidable and is
accelerated by sandy water.
A defective mechanical seal can lead to the liquid
becoming contaminated by oil leaking from the oil
chamber.
The pump should therefore be serviced after
approx. 2000 operating hours by a specialist or
Wilo Customer Services, mainly in order to check
the seals.
The encapsulated motor may only be opened by
specialists or by Wilo Customer Services.