Homa H 501 Series, Installation And Operation Instruction Manual

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8. Start-Up
Never let the pump run dry for a long time of period,
as it will destroy the pump (danger of overheating).
If necessary, check the direction of rotation of the
pump, as described under 6.4. Put the switch on the con-
trol box to the required mode of operation.
Connect the pump to the mains supply.
Model H 501 without float switch start running. To stop
the pump the pump disconnect the pump from the mains
supply.
All other models without float switch have an “On/Off”-
switch at the control box. Bring the switch into the position
“On”. The pump start running. To stop the pump bring the
switch in the position “Off”.
Model H 501 with float switch start running when the float
switch is raised by the water level to its on position, and
shut off
when the float switch is lowered by the water level
to its off position.
All other models with float switch have a “HAND/AUTO”-
switch. For a pump operation without the float switch turn
the switch in to the position „HAND“. If the medium is
pumped down return the switch into the position "Auto". In
position “AUTO” the pump start running when the float
switch is raised by the water level to its on position, and
shut off
when the float switch is lowered by the water level
to its off position.
9. Maintenance and Repair
In case of a defect of the pump, a repair shall be car-
ried out only by the manufacturer or through an author-
ized workshop. Modifications of the pump must be con-
firmed by the manufacturer. Only HOMA spare parts shall
be used.
In accordance with the product liability law we point
out that we shall not be liable for damages caused by our
product due to unauthorized repair by persons other than
the manufacturer or an authorized workshop or due to the
use of spare parts other than original HOMA parts. The
same product liability limitations are valid for accessories.
Before maintenance or repair disconnect the pump
from the power supply to avoid accidental starting of the
pump!
Before maintenance or repair make sure that all rotat-
ing parts stand still!
Before carrying out maintenance and service, the
pump must be thoroughly flushed with clean water. Rinse
the pump parts in clean water after dismanteling.
At pump types with oil chamber an overpressure can
escape with loosening of the oil chamber control screw.
Screw only when pressure balance took place.
Pumps running under normal operation conditions should
be inspected at least once a year. If the pumped liquid is
very muddy or sandy or if the pump is operating continu-
ously, the pump should be inspected every 1.000 operat-
ing hours.
For long and trouble-free operation of the pump, following
points should be checked regularly:
- Nominal current (A): Check with amp-meter.
- Pump parts and impeller: Check for possible wear.
Replace defective parts.
- Ball bearings: Check the shaft for noisy or heavy opera-
tion (turn the shaft by hand). Replace defective ball bear-
ings. A general overhaul of the pump is usally required in
case of defective ball bearings or poor motor function.
This work must be carried out by an authorized
service workshop.
- Cable entry: Make sure that the cable entry is watertight
and that the cables are not bent sharply and/or pinched.
Additionally at pump types with oil chamber:
- Oil level and oil condition in oil chamber:
Put the pump in horizontal position, so that the screw of
the oil chamber is above (at larger pumps: one of both
screws). Remove the screw and infer a small quantity of
oil. The oil becomes greyish white like milk if it contains
water. This may be the result of defective shaft seal.
In this case leave the condition of the shaft seals by a
HOMA Service to examine.
The oil should be replaced after 3000 operating hours.
Oil type: Shell Tellus C22, degradable HOMA-Atox (avail-
able on request). Used oil is to be disposed accordingly.
Servicing Contract
For a regular expert execution of all necessary mainte-
nance and inspection we recommend the conclusion of a
servicing contract by our HOMA Service. Please contact
our HOMA customer service.