Grundfos PS.W.04, Инструкция по установке и эксплуатации

Страница: 11 / 34

English (GB)
11
4.13 Installing the venting pipe
If the cover is not pre-installed with a venting pipe, we
recommend that you provide the pit with a venting pipe, supplied
as an accessory.
For installation, see section
4.6 Connecting the pipes .
Fig. 21 Pit with venting pipe
4.14 Installing the cable entry
The cables to the level switches and the pump can be led into the
pit through a cable entry in the side of the upper region of the pit.
See fig.
22 .
Fig. 22 Pipe for cable entry
5. Installing the level controllers
When installing the level controllers, observe the following points:
• To prevent air intake and vibrations in the pump, install the
stop level switch in such a way that the pump stops before air
is sucked into the pump.
• In the case of 1-pump operation, install the start level switch in
such a way that the pump starts at the required level; however,
start the pump before the liquid level reaches the lower edge
of the bottom inlet pipe.
• In the case of 2-pump operation, install the start level switches
in such a way that pump 2 starts before the liquid level
reaches the lower edge of the bottom inlet pipe, and so that
pump 1 starts correspondingly earlier.
• Install the high-level alarm switch about 10 cm above the start
level switch; however, the alarm must always be given before
the liquid level reaches the inlet pipe.
For further settings, see the installation and operating instructions
for the pump controller selected.
5.1 Start and stop levels
The effective volume of the pit must be so large that the number
of starts does not exceed the maximum permissible number. See
the installation and operating instructions for the pump.
5.2 Installing the pump controller
See the installation and operating instructions for the pump
controller.
TM0
6
3
91
3 1
2
1
5
TM
06
34
7
8
06
15
Adjust the length of the power 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 pit.
Make sure that the cable is not sharply bent or
pinched.
If the pit is equipped with an Auto
ADAPT
-controlled
pump, an external level controller is not needed.
Check that the pump controller is designed for the
pumps to be installed.