13
7.4. Installation of tank extension
Take the cover plate with the frame and floor drain of the
collecting tank down and put the cover frame out there.
Put the extension kit in the tank.
Afterwards put the cover frame on the extension kit.
Finally put the cover plate with floor drain on the frame.
8. Start Up
Never let the pump run dry for a long time of period,
as it will destroy the pump (danger of overheating).
Before starting the pump station make sure that all isolat-
ing valves are open and check that the unit runs satisfac-
torily.
Make sure that the correct phase sequence was proofed
at the 3-ph models.
Turn the operation switch inti the position "Auto".
In combination with the pneumatic level control the pump
starts and stops according to the liquid level in the tank.
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 authorized
workshop. Modifications of the pump must be confirmed
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.
Visual control at pump types with oil chamber (models
without cooling jacket or model „U“ with cooling jacket and
open cooling circuit):
Oil level and oil condition:
The condition of the mechanical seals can be visually con-
trolled as follows:
The pump in horizontal position, so that the screw of the
oil chamber is on top (for larger pumps: one of both oil
chamber screws).
Remove the screw and take out a small quantity of oil.
The oil becomes greyish white like milk the oil contains
water. This may the result of defective shaft seals.
In this case the condition of the shaft seals should be
checked by a HOMA Service shop.
The oil should be replaced after 3000 operating hours.
Oil type: degradable HOMA-ATOX. Used oil has to be
disposed according to the existing environmental rules
and regulations.
For long and trouble-free operation of the unit we recom-
mend the following measures:
•
Clean the pump station with clear water and
scour the pump station by running pumps every
6 months.
•
Check the operatability and the mobility of the
niveau sensors every 6 months.
•
Make an arrangement with you HOMA agent for
an annual maintenance.
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.
Return of pumps
If a pump has been used for a liquid which is injuri-
ous to health or toxic, the pump will be classified as con-
taminated.
If HOMA is requested to service the pump, HOMA must
be contacted with details about the pumped liquid, etc.
before the pump is returned for service. Otherwise HOMA
can refuse to accept the pump for service (see attach-
ment).
Possible costs of returning the pump are paid by the cus-
tomer. However, any application for service (no matter to
whom it may be made) must include details about the
pumped liquid if the pump has been used for liquids which
are injurious to health or toxic.
