Start-Up; Preparatory Work; Electrical Equipment - Homa concept 100 Originalbetriebsanleitung

have been deposited on the check valve and prevent the
opening. This is particularly true in view of the fact that
the pump has to be bled at every first startup after a long
downtime.
The disadvantage is that with an installation without a
check valve, the water returning from the pipe must be
absorbed with the rest of the residual water (wiped up
or removed by wet vacuum); therefore, in most cases it
is preferred rather than a possible pump failure. A check
valve should therefore only be installed for applications
involving frequent operation (at least 1 x per week).
No. Description
1 Hose coupling
2 Elbow
3 Non-return valve
4 Discharge
Lay the check valve on the pressure connection as illus-
trated. Then screw the conduit elbow on to the pressure
connection. Lastly, screw the hose connection on to the
conduit elbow.

5.3. Start-Up

This chapter contains all important instructions for the op-
erator 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 recti-
fied! The operation and maintenance manual must al-
ways be close to the machine, or be kept in a designat-
ed place where all operators can access it at all times.
To avoid damage to persons or property during oper-
ation of the machine, the following
machinery failures:
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 understood the operating instruc-
tions.
• 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 spec-
ified operating conditions.

5.4. Preparatory Work

The machine has been designed and mounted ac-
cording to state of the art, so that under normal
operating conditions it operates reliably and has
a long operating life. However, this requires the
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 Equipment

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.
troubleshooting
EngliSH | 25