Kessel Aqualift F Installation Manual page 24

Inspection
The Pumpstation Aqualift F should be inspected monthly by
the owner to make sure it is functioning properly and is water
tight.
Caution !!!
Before conducting any maintenance on this unit make sure
to disconnect the entire unit from its power source.
All of the inspection and maintenance instruction listed
below should be handled by an authorized service profes-
sional.
Repairs should only be handled by the manufacturer.
Maintenance
Important:
All screws / bolts on the system should be tightened to a ma-
ximum torque of 3 N.
DIN 1986 - 3 should be followed when maintaining this unit.
Maintenance should be handled by an authorized pro-
fessional and should include the following:
• Visual inspection of the pump and the pump housing /
Chamber
• Complete cleaning of the entire system including pumps
• Check for obvious wear and tear and build up of deposits
on the pump and the pump chamber
• Connection cables should be inspected for damage
• Closure valve to be tested to assure function – valve should
be replaced every 2 years
• Inspection chamber checked for leaks and for any build up
of deposits
• Isolation test of the pump motor
• Check the pump impeller for easy of rotation and also for
wear and tear and or build up.
Maintenance should be in accordance to DIN 1986-31
and should occur at the following intervals:
• Units in commercial applications should be maintained
every 3 months.
• Units in residential (multi-family) homes should be main-
tained every 6 months.
• Units in single family homes should be maintained every
year.
7.1 Pump information
The pump should be checked at regular intervals. In the case
that the pump begins running abnormally, louder than nor-
mal, begins to vibrate or the performance of the pump
decreases, the pump and impeller must be checked for wear
7. Inspection and Maintenance
and tear, damage or blockages. The motor assembly should
be opened with the 2 screws (ass seen in Section 10.2.1 and
10.2.2) and be removed from the pump housing. When ins-
pected the pump housing make sure that the ventilation open
is open and remains open during operation.
7.1.1 Seals (water tightness)
The seals on the rotor shaft should be inspected after the first
500 hours of pump use. After this initial inspection the seals
should be checked every six months or after 1000 hours of
operation, whichever comes first.
The seal on the rotor between the motor and the pump is lo-
cated between two mechanical ring seals which have a oil
holding chamber between them. The condition of the floating
seal on the bottom of the pump (the pumping medium side)
can be checked by examining the oil. In order to complete
this check, the two oil outlet plug screws have to be removed
(see illustration). After removing the two oil outlet plug scr-
ews the oil can be poured into a clear glass container. If the
oil is clean and clear then the lower floating ring seal is still
in good condition. If the oil is milky and cloudy or contains
dirty water, then the lower floating ring seal needs to be re-
placed. The replacement of this seal should only be handled
by a qualified professional. While replacing the lower seal,
the professional should also check the condition of the above
seal. If the oil needs to be changed, replace with non-viscous
paraffin oil HAFA CLAREX OM, Merck Nr. 7174 or equiva-
lent – non toxic (type Codex). Alternatively, allmotor oils with
the SAE 10W to SAE 20W may also be used. Do not mix any
type of oils with one another. The quantity of replacement oil
needed is 0.74 liter for both the 1.3 and 1.9 kW pumps.
7.1.2 Macerating blades (cutting blades)
The cutting blades of the pump should be checked during the
6 month inspection or if operation of the pump becomes lou-
der. The blades should be checked for wear and tear, da-
mage or blockage. The distance between the rotating surfa-
ce and the cutting blades should be 0.1 to 0.3 mm. Checking
or re-setting the cutting blades should only be handled by a
licensed professional
7.1.3 Bearings
The bearings are permanently lubricated and are mainten-
ance free. However, if operation of the motor becomes lou-
der and louder, the bearings should be inspected. Problems
can be confirmed if the rotor is difficult to turn by hand or
when turning the rotor / impeller by hand it is noticed that the
rotation axis is not exact (rotor is not firmly in place). If this is
the case the entire pump must be refurbished.
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