Homa CTP 50, Original Instruction Manual, Page: 34 / 72

34 | ENGLISH
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. Care-
lessness 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 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 han-
dle and lower the pump into the liquid. If the pump is in-
stalled 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 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 support-
ed 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
If the water level rises to a certain maximum level (switch-
on point), the float will automatically switch the pump on.
If the water level drops down to a certain minimum level
during pumping (switch-off point), the float switches off
the pump. The switching distance, i.e. the difference in
water level between activation and deactivation can be
determined individually.
For faultless operation, please follow the instructions
below:
• The mounting points and the length of the free end of
the float cable must be set to the desired switching
level. It should be noted that the switch-on point of
the pump is located below the intake line to prevent
a backflow of the pumping medium. The switch-off
point must be above the upper edge of the pump
housing, so that an air cushion cannot form in the
pump, which could make venting of the pump nec-
essary.
• In no event should the float and cable be thrown into
the pumping medium, as correct switching is only
possible when rotating the float to the attachment
point of the cable. Possible consequences if these
instructions are not followed include flooding (if the
pump does not turn on), or destruction of the pump
caused by dry running (if the pump does not stop).
• When using a separate float for starting or stopping
the pump and the alarm, the switching levels should
be selected as above. The alarm float should switch
about 10 cm above the pump activation point, but be-
low the intake.
• Important: after each change of the float attachment
it is necessary to check the proper function of the
float switch by performing a test run.