Homa CH235, Instruction Manual

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sleeve (Item 827.02) must be pulled in or out a bit more
(longer cable end = larger operating distance). The position
of the anti-kink sleeve (Item 827.02) must not be changed.
The distance between the anti-kink sleeve (Item 827.02)
and the float (Item 838.45) must be at least 10 cm.
838.45
827.02
732
Float switch for intermediate coupling
Pumps without float switch can be retrofitted with a
HOMA float switch for intermediate coupling. The elec-
trical connection is done by the intermediate coupling of
the float switch between the outlet and the plug of the
pump. With retrofitted installation, attach the float cable
onto the pump or riser tube or on any other permanently
installed point according to the desired switching distance
and level. Never throw the float with cable into the me-
dium, since the correct switching is only possible with a
rotary movement of the float around the mounting point
of the cable. Possible consequences of non-compliance
are flooding (pump does not turn on), or destruction of the
pump by running dry (pump does not stop).
Important: After each change of the float mounting, it is
necessary to check the proper function of the float switch
by performing a trial run. When using separate floats for
pump start, pump stop and the alarm set points (see
Chapter 7.2 Paragraph Reference) must be chosen as
above. The alarm float should turn about 10 cm above the
pump switch-on, but always below the inlet.
5.3. Start-Up
This chapter contains all important instructions for the
operator to ensure safe commissioning and operation of
the machine. The following information must be strictly
observed and reviewed:
• Type of installation
• Operating mode
• Minimum submergence/maximum immersion depth
After an extended down time, this data must be
also checked and any detected deficiencies must be
rectified! The operation and maintenance manual
must always be close to the machine, or be kept in a
designated place where all operators can access it at
all times.
To avoid damage to persons or property during operation
of the machine, the following points must be observed:
The commissioning of the machine must be carried
out only by qualified and trained personnel in accor-
dance with the safety instructions.
• The entire staff working with the machine must re-
ceive, read and understand the operating instructions.
• Check all safety devices and emergency stops before
commissioning.
• Electrical and mechanical adjustments may only be
performed only by qualified employees.
• This machine is only suitable for the use of the
specified operating conditions.
5.4. Preparatory Work
The machine has been designed and mounted according
to state of the art, so that under normal operating con-
ditions it operates reliably and has a long operating life.
However, this requires compliance with all requirements
and instructions. During delivery, small oil leakages of the
mechanical seal are acceptable, but must be removed
before lowering or immersion it into the medium to be
pumped.
Please check the following points:
• Cable routing - no loops, with some slack
• Check temperature of the medium and immersion
depth - see machine data sheet
• If a hose is used on the pressure side, it must be
flushed with clean water before use to ensure that
deposits will not cause blockages
• With wet well installation, the sump pit must be
cleaned.
• The pressure and suction piping must be cleaned and
all slides must be opened.
• The pump housing must be flooded, i.e. it must be
completely filled with the medium and no air should
be inside. The bleeding can be done by appropriate
venting devices in the system or, if available, by vent-
ing screws at the discharge nozzle.
• Check accessories, piping, hanging device for tight
and correct fit
• Inspect existing level controls or dry run protector
5.5. Electrical
When laying and selecting electrical cables and when con-
necting the motor, the relevant local and VDE regulations
must be observed.
Danger from electric current!
Improper use of electricity may result in death! All
pumps with bare cable ends must be connected by a
qualified electrician.