Installation; Free-Standing Submerged Installation; Installation Procedure - Grundfos DWK Serie Instrucciones De Instalación Y Funcionamiento

10. Installation

Check these points before beginning installation
procedures:
• Does the pump correspond to order.
• Is the pump suitable for the supply voltage and
frequency available at the installation site.
• Are accessories and other equipment
undamaged during transportation.
Warning
Observe all safety regulations at the
installation site.
Use blowers for fresh-air supply to the
tank.
Warning
Make sure that the lifting bracket is
tightened before attempting to lift the
pump. Tighten if necessary. Carelessness
during lifting or transportation may cause
injury to persons or damage to the pump.
Warning
Before beginning the installation, switch off
the power supply and lock the mains
switch in position 0 with a padlock to
ensure that the power supply cannot be
accidentally switched on.
Switch off any external voltage connected
to the pump before working on the pump.
Prior to installation, check the oil level in the oil
chamber. See section 14. Maintenance, inspection
and overhaul.
The pumps are designed for operation in
Caution
vertical position only.
The DWK pumps can be installed with a hose or
pipe.
10

10.1 Free-standing submerged installation

Pumps for free-standing submerged installation can
stand freely on the bottom of the tank or the like.
Fit a flexible union or coupling to the outlet port in
order to facilitate service on the pump and easy
separation of pump and outlet line.
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 outlet 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, we recommend that you support the
pump on bricks or a similar support.

Installation procedure

1. Lower the pump into the liquid by means of a
chain secured to the lifting bracket of the pump.
We recommend that you place the pump on a
plane, solid foundation. Make sure that the pump
stands securely.
2. 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.
3. 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. Make sure that the
cable is not sharply bent or pinched.
4. Connect the motor cable.
Fig. 4 Free-standing pump on strainer