Wilo -Drain TM 32 Einbau- Und Betriebsanleitung Seite 15

• When filling the shaft or lowering the pump into
the pit, make sure that the float switches can
move freely. The switch must switch off the pump
before the intake openings of the pump can draw
in air.
• After filling the shaft and opening the check valve
on the pressure side (if provided), the pump starts
up automatically when the switch-on level "h" is
reached and switches off as soon as the switch-
off level "h1" responds.
• 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 slit in the housing is
blocked.
• The maximum volume of water entering the shaft
must not exceed the performance of the pump.
Keep an eye on the shaft when commissioning the
pump.
NOTE: The venting of the pump when commis-
sioned for the first time will be improved by sub-
mersion in the fluid at an angle or by positioning it
at a slight angle.
Adjusting the switching level of the float switch
The perfect functioning of the level control sys-
tem is guaranteed if the details according to the
table in 7.1 and Fig. 2 are observed.
The switching level (switch-on/off point) can be
changed via the free float switch cable by moving
the cable within the clip on the pump handle. The
level "h2 min" must be respected (see Fig. 2).
On version TMR, to reach the maximum low suc-
tion level, the float switch must be manually lifted.
A small degree of water evacuation (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 slit in the housing is
blocked.
• The maximum quantity of water feeding into the
shaft may not exceed the pump's capacity. Moni-
tor the sump during commissioning.
• To increase the required capacity (by approx.16%
of the delivery head) the whirl system device of
the TMW pump can be shut down as follows
(fig. 3):
• Pull the mains plug,
• Remove pump from the sump,
• 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.
Installation and operating instructions Wilo-Drain TM/TMW/TMR
9 Maintenance
Maintenance and repairs may only be carried out
by qualified experts!
DANGER! Risk of fatal injury!
There is a mortal danger through shock when
working on electrical equipment.
• Before any maintenance and repair work, the
pump must be switched off and prevented from
being switched on again in an unauthorised
manner.
• Damage to the connecting cable may only be
repaired by a qualified electrical contractor in
principle.
• When checking the function following long
downtimes, avoid contact with the fluid.
In order to prevent blockage of the pump resulting
from long downtimes, its ability to function should
be checked at regular intervals (every 2 months)
by manual raising of the float switch or direct
switching-on and brief start-up of the pump.
Minor wear of the rotary shaft seal and mechanical
seal can lead to fouling of the liquid following an
oil leak from the oil chamber.
The pump should therefore be serviced after
approx. 2000 operating hours by a specialist or
Wilo After-sales Service, mainly in order to check
the seals.
Only specialist companies or Wilo After-sales
Service may open the encapsulated motor.
Cleaning the pump
Depending on the use of the pump, fouling can
occur within the suction strainer and the impeller.
Rinse off he pump under running water after use.
1 Switch off the power supply. Disconnect the
mains plug.
2 Drain the pump
TMW:
3 The whirl device is screwed to the suction
strainer (fig. 3).
• Loosen 4 screws (∅3.5 x 14),
• Remove whirl device,
4 The suction strainer is screwed to the pump
housing,
• Loosen 4 screws (∅4 x 60),
• Remove suction strainer, handle O-ring
(∅155 x 2) between suction strainer / pump
housing and O-ring (∅14 x 2) in the bypass
hole (necessary for the whirl function) with
care.
TM/TMR:
4 The suction strainer is screwed to the pump
housing,
• Loosen 4 screws (∅4 x 60),
• Remove suction strainer, handle O-ring
(∅155 x 2) between suction strainer / pump
housing with care.
5 Clean the impeller and pump housing under
running water. The impeller must turn freely.
6 Replace damaged or worn parts with original
spares.
7 Re-assembly the pump in the reverse order.
English
13