Table des Matières
Publicité
Les langues disponibles
Les langues disponibles
With bigger pumps the check may also be done by watch-
ing the rotation of the impeller through the
discharge or the suction inlet. With pumps
already installed, the check may be done by
comparing head (pump pressure) and flow
(quantity of water) at different direction of rota-
tion. The direction that gives higher head and
flow is the correct one. If the direction of rota-
tion is wrong, interchange two of the phases of
the electric power supply. Using an original
HOMA control box with CEE-plug, this may be
done by a 180° turning of the small round pole
socket at the plug-end with a screwdriver.
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
flooding of rooms caused by defects of the pump through
the use of appropriate measures (e.g. installation of alarm
units, backup pump or the like).
7.1. Submerged Installation
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 rope or 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
stationary 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 provi-
sionally with 2 screws.
• Put the auto-coupling base unit in the exact position and
fasten with expansion bolts to the pit bottom. If the bot-
tom is uneven, the base unit must be supported to be in
horizontal position.
• Assemble the discharge line in accordance with the
generally accepted procedures and without exposing the
line to distortion or tension.
• Insert the guide rails in the rings of the auto-coupling
base and adjust the length of the rails by cutting them
accurately 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 opera-
tion.
• 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
damaged during the pump operation. Make sure that the
cables are not sharply bent or pinched.
7.3 Automatic Floatswitch Control
The pumps may be supplied with floatswitch 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
adjusted by adjusting the free swinging length of the cable
between the floatswitch 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 floatswitch 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.
Note: Only the proper adjustment and fixing of the
floatswitch cable will guarantee a reliable pump operation.
After any modification of the floatswitch adjustment the
function must be checked by a test-run of the pumps.
8. Start-Up
Never let the pump run dry for a long time of period,
as it will destroy the pump (danger of overheating).
Start the pump, when the system has been filled with
liquid and vented. Open the isolating valves. Check the
position of the floatswitches. If necessary, check the direc-
tion of rotation of the pump, as described under 6.4. Put
the switch on the control box to the required mode of
operation.
9. Maintenance and Repair
In case of a defect of the pump, a repair shall be
carried out only by the manufacturer or through an author-
ized workshop. Conversions or alternations of the ma-
chine/units are permitted only after arrangement with the
manufacturer. Only HOMA spare parts shall be used.
In accordance with product liability law we point out
that we shall not be liable for damages caused by our
product due to unauthorized repair by persons other than
the manufacturer or an authorized workshop or due to the
use of spare parts other than original HOMA parts.
13
Publicité
Chapitres
Table des Matières
