Wilo-TOP-E / TOP-ED / TOP-EV - NRF

– It is recommended that a shut-off device be installed
in front of and behind the pump. This avoids the
necessity to empty and fill the unit every time a
pump has to be replaced.
Additional isolating devices are no longer required
for pump type TOP-EV. The isolating units are built
into the pump casing. Therefore it is no longer
necessary to drain and refill the installation as and
when the motor module needs changing.
Assembly is to be carried out in such a way that no
drops fall onto the pump motor or the terminal box.
– When assembling pumps with all-purpose flange
PN 6/10 the following guidelines are to be observed
(Fig. 10):
1. It is not permitted to assemble all-purpose
flanges with all-purpose flanges.
2. enclosed plain washers (pos. 1) must be used
between the screw/nut head and the all-purpose
flange.
ATTENTION! Safety elements (e.g. lock washers)
are not permitted.
ATTENTION! In the event of incorrect assembly
the screw nut may become locked
in the oblong hole. This may adversely
influence the operatability
of the flange connection due to the
inadequate tension of the screws.
3. It is recommended to use screws for flange
connections of property class 4.6 if screws of
higher properties are used for the assembly only
the torque according to property class 4.6 is
permissible.
Permissible torque of property class 4.6:
for M 12 f 40 Nm,
for M 16 f 95 Nm
ATTENTION! If screws of higher property classes
are used, splintering may occur
around the edges of the oblong
holes due to the higher screw tensions.
This will cause the screws to
lose their tension and the flange
connection may become leaky.
4. Screws of sufficient length must be used:
Flange connection
PN 6
Flange connection
PN 10
Thread
M 12
M 16
min. screw length
DN 40 DN 50/DN 65
55 mm 60 mm
60 mm
65 mm
ENGLISH
– During the installation of TOP-EV union pumps, the
valve unit must be hold with a spanner in the
correct position while fixing the union nut.
ATTENTION! The valve unit can turn during the
assembly, the pump can be brought
back in the correct position by
turning. The hexagon for operating
the valve should be positioned on
the left side of the pump in order to
garantee free access for the spanner.
– When installing flow pipes in open units, the expansion
flow pipe must branch off before the pump.
– Assembly should be voltage-free. The pipes must
be attached in such a way that the pump does not
bear the weight of the pipes.
– The direction of flow must correspond to the arrow
on the pump housing.
– The air inlet to the heat sink must not be blocked
in any way.
– Only installation positions in accordance with
Fig. 8a/8b are permissible. The pump shaft must lie
horizontally. For pumps with P1 ≥ 500 W the ribs of
the heat sink must stand vertically to the electronic
module. It is possible that the motor housing has to
be turned after loosening the Allen screws.
ATTENTION! In doing so, care must be taken not to
damage the O-ring between the split
pot and the pump housing. The O-ring
must lie, unturned, in the edge of the
split pot which faces the impeller.
– Place both thermal lagging shells on the single pump
and press them together so that the pilot pins lock
into their respective, opposite holes.
– ATTENTION! For units which are to be insulated,
only the pump housing may be insulated.
The condensation water
holes on the motor flange must
remain open.
5.2 Electrical connection
Electrical connection should be made by
a qualified electrician. Current national
regulations must be observed (e.g. VDE
regulations in Germany).
– According to Part 1 of the VDE 0730, the pump
must be connected to the electrical supply by a
solid wire (min. 3 x 1.5 mm2) equipped with a plug
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