Use Of Chains; Start-Up - Homa TP 28 Originalbetriebsanleitung

• 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 fol-
low 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.

5.3. Use of chains

Chains are using for lowering and raising the pump in the
operating area. They are not using to safe pending pumps.
Use them as follows:
• Fix one end of the chain on the handle of the pump.
• Fix the other end of the chain on the lifting gear.
• Tight the chain and lift the pump slowly.
• Swing the pump over the operating area and lower
it carefully.
• Make sure if the pump stands secure or if the cou-
pling system is connect tightly.
• Remove the chain from the lifting gear and safe it on
the chain guard on the top of the operating area.
• Make sure that the chain cannot fall down.
Therefore please look at the following drawings.
No. Description
1 Chain guard
2 Chain
3 Handle
4 Pump

5.4. Start-Up

The „Start-up" chapter contains all the important instruc-
tions for the operating personnel for starting up and op-
erating the machine safely. The following specifications
must be adhered to and checked:
• Type of installation
• Operating mode
• Minimum water coverage / max. submersion
If the machine has not been operated for some time,
check these specifications again and rectify any faults
you find!
EngliSH | 45