Homa TCV 409 Series, Original Instruction Manual

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6. Electrical Connection
Before operation, an expert check must secure that
the required electrical protection measures exist. The
connection to ground, earthing, isolating transformer, fault
current breaker or fault voltags circuit must correspond to
the guidelines set forth by the responsible power plant.
The voltage required in the technical data sheet
must correspond to the existing line voltage.
Submersible pumps used outside of buildings must
have a cable with a minimum length of 10m.
Make sure that the electrical pin-and-socket connec-
tions are installed flood- and moisture-safe. Before start-
ing operation check the cable and the plug against dam-
ages.
The end of the pump power supply cable must not be
submerged in order to prevent water from penetrating
through the cable into the motor.
The normal separate motor starter/control box of
standard as well as explosion proof pumps must
not be installed in explosive enviroments.
6.1. Connection of 1 Ph-Motors
TCV and TCM pumps are supplied with a plug and a ca-
pacitor which is integrated in the pump. If any other then
an original control unit is used, make sure that the thermal
relay in the motor starter is set according to the nominal
current consumption of the pump motor (see data
on pump label).
6.3. Temperature Sensors
Standard models of 1Ph-motors have the sensors (built in
upon request) internally connected, so that no external
connection to the control box is necessary. When the mo-
tor cools, it is switched on again automatically. The
switch-off temperature of the sensors is approx. 130°C.
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 like that).
7.1. Submerged Base Stand 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 it 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 ring of the auto-coupling base
and adjust the length of the rails by cutting them accu-
rately 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 be-
tween 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 auto-
matically 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 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.