Sound Pressure Level; Safety; Transportation And Storage; Installation - Grundfos DW series Montage- Und Betriebsanleitung

2.2.4 Installation depths
Pump type
DW.50.08.(A)1/3
DW.50.07.(A)1
DW.50.09.(A)3
DW.65.27.(A)
DW.65.39.(A)H
DW.100.66.(A)H
DW.100.39.(A)
DW.100.66.(A)
DW.100.110.(A)H
DW.100.200.(A)H
DW.150.110.(A)
DW.150.200.(A)
2.2.5 Level of pumped liquid
The lowest stop level is the level where the pump
starts to suck air.
The A models have an integrated level control
system. A stands for "Automatic". This system will
stop the pump when the stop level is reached. Model
DW.50.08.A has an external float switch.
2.2.6 Operation
The pumps are designed for continuous operation.
The A models have to be switched over to "C" for
continuous operation.
For model DW.50.08.A, the float switch must be tied
up. See fig. 1.
Fig. 1 DW.50.08.A

2.3 Sound pressure level

The sound pressure level of the pump is lower than
the limiting values stated in the EC Council Directive
2006/42//EC relating to machinery.
6
Maximum depth
5 metres
17 metres

3. Safety

Warning
Pump installation in wells must be carried
out by specially trained persons.

4. Transportation and storage

The pump may be transported and stored in a
vertical or horizontal position. Make sure that it
cannot roll or fall over.
Always lift the pump by its carrying handle, never by
the motor cable or the hose/pipe.
If the staff do not have the necessary knowledge
about handling and lifting the pump they must be
trained and instructed accordingly.
For long periods of storage, the pump must be
protected against moisture and heat.
After a long period of storage, the pump should be
inspected before it is put into operation. Make sure
that the impeller can rotate freely. Pay special
attention to the shaft seals and the cable entry.

5. Installation

Installation dimensions, see page 120.
Prior to installation, check the oil level in the oil
chamber, see section 8. Maintenance and
The DW pumps have pump housing for free-standing
installation.
The pump can be installed with a hose/pipe.
In order to facilitate service of the pump, fit a flexible
union or coupling to the discharge line 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 discharge port.
If the pump is installed in muddy conditions or on
uneven ground, it is recommended to support the
pump on bricks.
Lower the pump into the liquid.
service.