Setting Up And Starting Up; General; Installation; Starting Up - Homa CH150 WA Original Instruction Manual

5. Setting up and starting up

5.1 General

In order to prevent damage to the pump while setting it
up and operating it, the following points are to be heeded:
• Setting-up work is to be carried out by qualified per-
sonnel in compliance with the safety regulations.
• Before being set up, the pump is to be checked for
any damage.
• In the case of level control systems, the minimum
water cover is to be ensured.
• Air inclusions in the pump housing and pipework
must absolutely be prevented (by suitable venting de-
vices or by slightly tilting the pump).
• Protect the pump against frost.
• The current leads of the pump must be laid so that
operation is safe and assembly/disassembly is easy.
• Running dry is most strictly forbidden. We recom-
mend a level control system for this purpose.
• Carry the pump by the handle and empty it into the
conveyed medium, not on to the cable, using a rope
or chain.If the supporting surface is muddy, lay stones
or the like under the pump to keep it from sinking in.
• If the substrate is sludgy, place stones or similar un-
der the pump to prevent sinking.
• If a hose is used, make sure it is laid without kinks.

5.2 Installation

Danger due to falling!
During the installation of the pump and its accesso-
ries, work is done directly at the edge of the basin.
Inattentiveness or incorrect footwear may cause a
fall. Danger of fatal accident!
Take all safety precautions in order to prevent this.
The pump must be installed according to the examples.
For installations to EN 12056-4, the pressure pipe must be
routed in a loop above the locally stipulated backflow level
and secured with a non-return valve. The non-return valve
supplied is only needed for mobile operation.
For a longer pressure pipe, choose a correspondingly large
pipe cross-section to avoid pipe friction loss.
Continuous venting of the pump housing may be needed
if the pump occasionally dries out (i.e. the discharge is no
longer submerged). This can happen if, for example, the
residual water in the collection sump evaporates or the
pump has gone into sip operation during a test run.
For reliable venting of the pump housing, the air vent
screw on the pump housing can be removed.
Automatic float switch
Because the float switch in the pump is directly con-
nected, the pump switches on automatically when
this switch is manually triggered! Therefore, make
sure that the pump is not connected when you are
working on it.
When the water level rises to the switch-on point, the
rising float switch automatically switches the pump on.
When the water level drops to the switch-off point due to
water being pumped out, the pump is switched off by the
float switch.
Purging device
The pump can keep the bottom of the sump largely free
of deposits in the suction area. The pump rate drops only
slightly due to this. For this reason, drill three holes mea-
suring 5 mm in diameter through the areas indicated as
shown in the image.
Low level suction
The pump can pump out the residual water down to a
height of 5 mm. To do this, the strainer must be removed
from the pump housing. The strainer is fixed to the pump
housing with a bayonet lock. Turn the strainer anti-clock-
wise and then pull it off the pump housing.
In addition, the float switch must
be locked in the "on" position. To
do this, push the float switch
lock supplied over the swivel
joint on the float arm, as shown.
To commence pumping, the drain hose must be emptied
before the pumping process begins, and the water level
must be at least 60 mm.
Mobile operation
Mobile operation is only permitted with a strainer for safe-
ty reasons. If a hose is used as the pressure pipe, make
sure that it is fully emptied before immersing the pump
for each pumping process. Any residual liquid remain-
ing would prevent pump housing venting and therefore
pumping. For the same reason, the pump will not work if
switched on before immersion.

5.3. Starting up

This section contains all important instructions for operat-
ing staff to start up and operate the machine safely. The
following information must be complied with and checked
without fail:
• Type of installation
• Mode of operation
• Minimum water cover / max. immersion depth
These details are also to be checked after a prolonged
standstill period, and any defects discovered are to be
eliminated.
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