Installation; Submerged Base Stand Installation; Submerged Installation With Auto-Coupling; Dry Installation - Homa AMX 644-330 53 F Serie Manuel D'instructions De Montage Et D'exploitation

7. Installation

Pay attention to the maximum depth of immersion (see
pump label).
If the pump is installed in a sump, the sump opening
must be covered with a tread-safe cover after installation.
The operator has to prevent damage through the floo-
ding of rooms caused by defects of the pump through the
use of appropriate measures (e.g. installation of alarm
units, backup pump or like that).

7.1. Submerged Base Stand Installation

A separate ring base stand, which is available as an acces-
sory must be fixed at the bottom of the pump.
Fix a 90° elbow to the pump discharge. The pump may be
installed with a flexible discharge hose or a rigid pipe, non-
return valve and isolating valve. If a flexible hose is used,
make sure that it does not buckle.
Fix a chain to the pump handle and lower the pump into the
liquid. If the pump is installed on muddy ground,
support it on bricks to prevent if from sinking in.

7.2. Submerged Installation with auto-coupling

Permanent installation of the pumps can be done on a sta-
tionary auto-coupling. The following instructions refer
to the use of the original HOMA system.
⇒ Place the auto-coupling base unit on the bottom of the pit.
Use a plumb line to fix the correct position of the guide rail
bracket on the inside of the pit cover. Drill mounting holes
and fasten the guide rail bracket provisionally with 2
screws.
⇒ Put the auto-coupling base unit in the exact position and
fasten with expansion bolts to the pit bottom. If the bottom
is uneven, the base unit must be supported to be in hori-
zontal position.
⇒ Assemble the discharge pipe in accordance with the ge-
nerally accepted procedures and without exposing the pi-
pe to distortion or tension.
⇒ Insert the guide rails in the ring of the auto-coupling base
and adjust the length of the rails by cutting them accura-
tely to the guide rail bracket.
⇒ Unscrew the provisionally fastenend guide rail bracket, fit
it on top of the guide rails and fasten it to the pit cover.
Make sure that the guide rails do not have any axial play,
as this would cause noise during pump operation.
⇒ Clean out debris from the pit before lowering the pump
into operation position.
⇒ Fit the coupling flange at the discharge of the pump. Make
sure that the rubber profile-seal is properly fixed to the
flange and will not fall off when the pump is lowered into
the pit. Slide the guide bar of the coupling flange between
the guide rails and lower the pump into the pit by means
of a chain secured to the pump handle. When the pump
reaches the auto-coupling base unit, it will automatically
connect tightly.
⇒ Hang up the end of the chain to a suitable hook at the top
of the pit.
⇒ Adjust the length of the motor cable, so that it is not da-
maged during the pump operation. Make sure that the
cables are not sharply bent or pinched.

7.3. Dry Installation

For installation of the pump outside the collection sump, a
suction pipe must be connected to the pump inlet.
Only pumps with motor jacket cooling must be used for dry
installation.
The pump may be installed vertical or horizontal.
⇒ Fit the bracket or the basestand to the pump.
⇒ Mark and drill mounting holes in the concrete floor.
⇒ Fasten the pump with expansion bolts.
⇒ Connect the motor cable and the monitoring cable.
⇒ Fit the suction and discharge pipes and isolating valves,
if used, and ensure that the pump is not stressed by the
pipe work.

7.4. Automatic Float Switch Control

The pumps may be supplied with float switch level control-
lers. They start and stop the pump according to the
liquid level in the pit.
The difference in level between start and stop must be ad-
justed by adjusting the free swinging length of the cable
between the float switch and the cable fastening. Long
cable end: Large difference in level. Short cable end: Small
difference in level.
The stop level must be adjusted in such a way, that the
pump stops before the liquid level is lowered below the
top of the pump volute.
The start level must in any case be below the bottom of
the liquid inlet pipe of the pit.
The high alarm level, if a separate float switch for that is
installed, should be adjusted approx. 10 cm above the start
level, in any case it must be below the bottom of the liquid
inlet pipe of the pit, so that the start level must be
adjusted accordingly.
Never place the float switch in the sump without fixing the
float switch cable to a fixed point i the sump, because the
float switch needs a rotation around the fixing point of the
cable to operate without any problems. Non-observance
may cause an overflow because the pump does not start
running or a dry run of the pump in fact that the pump does
not stop, which will destroy the pump.
Note: Only the proper adjustement and fixing of the float
switch cable will guarantee a reliable pump operation. After
any modification of the float switch adjustment the
function must be checked by a test-run of the pump.

8. Start-Up

Never let the pump run dry for a long time of period, as
it will destroy the pump (danger of overheating).
Wet well installation
Start the pump, when the system has been filled with liquid
and vented. Open the isolating valves. Check the position
of the float switches. If necessary, check the direction of
rotation of the pump, as described under 6.4. Put the switch
on the control box to the required mode of
operation.
Dry well installation
On dry installation, make sure that the liquid level in the
collection sump is above the top of the pump volute. If ne-
cessary, check the direction of rotation of the pump, as de-
scribed under 6.4. Put the switch on the control box to the
required mode of operation.
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