Installation And Start-Up; General; Installation - Homa H 500 Serie Originalbetriebsanleitung

5. Installation and Start-Up

5.1 General

The following points must be noted in order to prevent damages to the pump during installation and operation:

The installation work must be carried out by qualified personnel in compliance with the safety
regulations.

The pump must be checked for possible damages prior to installation.

The minimum submersion in water must be considered for level control.

Air pockets in the pump casing and in pipes must be absolutely avoided (by means of appropriate
venting facilities or slight tilting of the pump).

Protect the pump from frost.

The mechanical room must be designed for the respective machinery. This includes also that a
lifting device for assembly/disassembly can be installed, with which the installation site of the pump
can be reached without danger.

The lifting device must have a maximal lifting power which is more than the weight of the pump with
mounting parts and cable.

The power lines of the pump must run in such a way that hazard-free operation and easy
assembly/disassembly is possible.

5.2 Installation

Danger of falls!
When mounting the pump and its accessories, work is carried out directly at the edge of the basin!
Carelessness or wrong footwear can lead to falls. There is danger to life!
Take all safety measures to prevent this.
Fix the pressure pipe or the hose on the pressure branch of the pump and lay the
pressure pipe. When using a threaded hose connection or pipe connection, the
hose connector at the branch of the pump can be cut off. Additionally, a swing
check valve can be mounted in the pressure pipe to prevent backward running of
the water when the pump is switched off. The pressure pipe must be mounted
without tension.
When using a hose, it must be ensured that this is laid out without bends. When
using accessories, e.g. a quick coupling or similar, it has to be ensured that these
are sealed with Teflon tape, since leakage reduces the conveyor performance of the
pump.
Fix the pump on the handhold with a rope or chain and lower down into the medium.
In the event of muddy ground, lay stones (or sim.) under the pump to prevent
sinking.
Installation on the ground
Mount the pressure pipe with the aid of a Storz-fixed coupling that is screwed onto
the central pressure connection or with an STA hose coupling. The pressure pipe
must be laid out without bends. The internal diameter of the pipe must correspond
to that of the pressure connection. Place pump into the medium. When used on
muddy, sagging ground stones or similar must be laid under the pump or it must be
placed in a close-meshed basket, so that the intake strainer is protected from
obstruction.
Automatic float switch
If the water level increases to a determined maximum level (switching point), the floating float automatically
switches the pump on. If the water level has sunk to a determined minimum level (tripping point) due to pumping
down, the float switches the pump off.
The reacting distance, i.e. the water level difference between switching point and tripping point, can be
determined individually. For perfect functioning, please note the following information:
The mountings as well as the length of the freely moveable end of the float cable must be adjusted to the desired
switch level. Here it has to be ensured that the switching point of the pump is below the entrance pipe so that an
obstruction of the pumping medium can be avoided. The tripping point must be above the upper edge of the pump
casing so that no air pockets can develop in the pump, which could possibly require de-aerating of the pump.
Under no circumstances may the float with the cable be simply thrown into the medium, since a correct switch is
only possible with a rotational movement of the float around the mounting point of the cable. Possible
consequences in the event of non-compliance are flooding (the pump does not start)/destruction of the pump due
to a dry run (the pump does not switch off).
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