Setting Up And Starting Up; General; Installation; Mobile Operation - Homa C140 WA Manuel D'instructions Original

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
devices 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 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 built in as in the examples. In installa-
tions complying with EN 12056-4, the pressure pipe must
be led as a loop above the locally specified backflow lev-
el, and must be secured with a backflow preventer. The
check valve supplied is required for mobile operation only.
If the pressure pipe is lengthy, a correspondingly greater
pipe cross-section should be selected to prevent friction
losses within it.
If the pump sometimes runs dry (the discharge outlet ap-
pears at the surface), the pump housing may require con-
stant venting. This happens, for example, if the residual
water in the collector shaft evaporates or the pump enters
into slurp operation during a trial run.
The venting screw on the pump housing may be removed
to ensure that the pump housing is securely vented.
Automatic float switch
The direct connection of the float switch in the pump
causes the pump to switch on automatically when it
is manually initiated. Make sure therefore that the
pump is not connected while you are working on it.
If the water level rises to the switch-on point, the rising
float will switch the pump on automatically. If pumping
out has caused the water level to fall to the switch-off
point, the float will switch the pump off.
Rinsing device
The pump can keep the bottom of the shaft in the suc-
tion area largely free of deposits. The pump output is only
slightly reduced thereby. For this purpose, drill three holes
with a diameter of 5mm through the indicated areas, as
shown in the Figure.
Check valve
To assemble the check valve, proceed as follows:
1. Rotate the connecting bracket (9) of the pump dis-
charge outlet.
2. Position the check valve (10) so that it fits perfectly
into the discharge outlet. The smooth surface should
face outwards.
3. Fasten the check valve with the screw (8).
4. Screw the connecting bracket back on to the dis-
charge outlet.
Draining a flat surface
The pump can pump residual water out to a depth of
5mm. To do this, dismantle the suction strainer from the
pump housing. Between suction strainer and pump hous-
ing are two opposed recesses. Plug a screwdriver in both
pits to pull down the suction strainer. Place the pump on
the now visible feet.
In addition, the float must be
held in the switched-on position.
To do this, insert the float arrest-
er supplied over the pivot joint
on the float arm (2).
In order to allow the pump to
convey media, the discharge
hose must be emptied before the pumping operation and
a minimum water level of 40mm must be present.

Mobile operation

For reasons of safety, mobile operation is authorized only
if a suction filter is present. If a hose is used as a pres-
sure pipe, it must be ensured during every pumping op-
eration that it is completely emptied before the pump is
immersed. Any residual liquids still present would prevent
the venting of the pump housing, and thus prevent the
pump conveying. For the same reason, the pump will not
convey media if it is already turned on before being im-
mersed.
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