Connection Of Discharge Pipe - Grundfos Unilift CC 5 Montage- Und Betriebsanleitung

7.3 Connection of discharge pipe

The discharge pipe can be connected directly to the
pump top discharge port or by means of the adapter.
To prevent backflow through the pump when it stops,
the supplied non-return valve can be fitted in the
adapter. The non-return valve is fixed when the
adapter is fitted to the pump top discharge port.
Fig. 7 Adapter and non-return valve (position
and function)
The adapter enables the connection of a pipe or
hose matching 3/4", 1" and 1 1/4" external pipe
thread (G). Cut off the adapter so that it matches the
discharge pipe diameter. If a system gasket is used
between the discharge pipe and the adapter, the cut-
off adapter must have an even and smooth surface.
The approval according to DIN EN 12056-4
stipulates that the pipe from the fixed installation
must be connected directly to the pump discharge
port. If the supplied adapter is to be used, the 3/4"
and 1" sockets must be cut off.
8
7.3.1 Using the side discharge port
If you want to use the side discharge port, proceed
as follows:
1. Remove the non-return valve and adapter from
the top discharge port.
2. Remove the side plug and screw it on the top
discharge port.
3. Fit the 90 ° bend in the side discharge port.
Use thread sealing tape or similar material.
4. Fit the non-return valve in the vertical part of the
90 ° bend.
5. Connect the discharge line direct to the
discharge port.
Position the non-return valve in the
vertical part of the 90 ° bend.
If positioned in the horizontal part of
Note
the 90 ° bend, the non-return valve may
not function correctly.
Fig. 8 Correct position of non-return valve