Use Of Chains; Start-Up - Homa H307 Manuel D'instructions Original

• 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 Control
The pumps may be supplied with float switch level con-
trollers. They start and stop the pump according to the liq-
uid 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.
32 | ENGLISH

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.
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! The operation and maintenance handbook
must always be kept either by the machine or in a
place specially reserved for it where it is accessible for
operating personnel at all times.