Installation - Homa TCV series Original Instruction Manual

No. Description
1 Pipe
2 Coupling system
3 Service room
4 Inlet
5 Baffle plate
6 min. liquid level
7 Pump

5.2. Installation

Danger of falling! Installation work for the pump and
its accessories is performed directly on the edge of
the basin. Carelessness or wearing inappropriate
clothing could result in a fall. There is a risk of fatal
injury! Take all necessary safety precautions to
prevent this.
Submerged Base Stand Installation
A separate ring base stand, which is available as an ac-
cessory 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.
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
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 suppor-
ted to be in horizontal position.
• Assemble the discharge pipe in accordance with the
generally accepted procedures and without exposing
the pipe 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
accurately to the guide rail bracket.
• Unscrew the provisionally fastened guide rail brack-
et, 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 cou-
pling 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-cou-
pling 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.
Automatic Float Switch Control
The pumps may be supplied with float switch level con-
trollers. 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 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 housing. 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 in the sump, because
the float switch needs a rotation around the fixing point
of the cable to operate without any problems. Non-obser-
vance 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 adjustment 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.
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