Grundfos SL1 Serie Montage- Und Betriebsanleitung Seite 11

8. Slide the guide claw of the pump between the guide rails and
lower the pump into the tank by means of a chain secured to
the lifting bracket of the pump. When the pump reaches the
auto-coupling base unit, the pump will automatically connect
tightly.
9. Hang up the end of the chain on a suitable hook at the top of
the tank and in such a way that the chain cannot come into
contact with the pump housing.
10. Adjust the length of the motor cable by coiling it up on a relief
fitting to ensure that the cable is not damaged during
operation. Fasten the relief fitting to a suitable hook at the top
of the tank. Make sure that the cables are not sharply bent or
pinched.
11. Connect the motor cable.
The free end of the cable must not be submerged, as
Note
water may penetrate into the cable .
7.2 Free-standing submerged installation on ring
stand
Fig. 5 Free-standing submerged installation on a ring stand
Pumps for free-standing submerged installation can stand freely
on the bottom of the tank. The pump must be installed on a ring
stand. See fig. 5.
The ring stand is available as an accessory.
In order to facilitate service on the pump, fit a flexible union or
coupling to the elbow on the discharge port for easy separation.
If a hose is used, make sure that the hose does not buckle and
that the inside diameter of the hose matches that of the pump
discharge port.
If a rigid pipe is used, fit the union or coupling, non-return valve
and isolating valve in the order mentioned, when viewed from the
pump.
If the pump is installed in muddy conditions or on uneven ground,
support the pump on bricks or a similar support.
Proceed as follows:
1. Fit a 90 ° elbow to the pump discharge port and connect the
discharge pipe/hose.
2. Lower the pump into the liquid by means of a chain secured to
the lifting bracket of the pump. We recommend to place the
pump on a plane, solid foundation. Make sure that the pump is
hanging from the chain and not the cable. Make sure that the
pump is standing securely.
3. Hang up the end of the chain on a suitable hook at the top of
the tank and in such a way that the chain cannot come into
contact with the pump housing.
4. Adjust the length of the motor cable by coiling it up on a relief
fitting to ensure that the cable is not damaged during
operation. Fasten the relief fitting to a suitable hook at the top
of the tank. Make sure that the cable is not sharply bent or
pinched.
5. Connect the motor cable.
The free end of the cable must not be submerged, as
Note
water may penetrate into the cable.
7.3 Torques for suction and discharge flanges
Grade 4.6 (5) galvanized steel screws and nuts
Pitch
Nominal circle
diameter diameter
[mm]
DN 65 145
DN 80 160
DN 100 180
DN 150 240
Grade A2.50 (AISI 304) steel screws and nuts
Pitch
Nominal circle
diameter diameter
[mm]
DN 65 145
DN 80 160
DN 100 180
DN 150 240
The gasket must be a full face, reinforced paper
Caution
gasket like Klingersil C4300. If softer gasket material
is used, torques must be reconsidered.
Specified torques
rounded off by ± 5
[Nm]
Screws
Slightly Well
oiled lubricated
4 x M16 70 60
8 x M16 70 60
8 x M16 70 60
8 x M20 140 120
Specified torques
rounded off by ± 5
[Nm]
Screws
Slightly Well
oiled lubricated
4 x M16 - 60
8 x M16 - 60
8 x M16 - 60
8 x M20 - 120
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