Maintenance; Maintenance Of The Impeller - Newa NKF 250 Manual De Instrucciones

ATTENTION: DO NOT CONNECT THE FILTER PLUG TO THE POWER SUPPLY UNTIL THE UNIT IS FILLED WITH WATER, AS IT
MAY CAUSE DAMAGE OF THE ROTOR.
ATTENTION: DO NOT PLACE THE AERATOR DRIPSTONES CLOSE TO THE INLET BLOCK, AS IT MAY IMPEDE THE EFFICIENT
FILTER OPERATION AND GENERATE NOISE.

MAINTENANCE

ATTENTION: REMOVE ALL ELECTRICAL APPLIANCES IN THE AQUARIUM BEFORE CARRYING OUT INSTALLATION AND
EN
MAINTENANCE OPERATIONS. IN CASE OF MOISTURE INGRESS TO THE PLUG OR ELECTRICAL SOCKET, BREAK THE
NETWORK MAIN SWITCH, PRIOR TO DISCONNECTION OF THE SUPPLY CABLE.
Perform any maintenance operations when the filter is switched off, strictly observing the following instructions
1. Disconnect the filter from the power supply.
2. Close the shutoff valve, by pulling the green lever located between the two taps and raising it up to the full attainment of its
end position. The green lever will be in a vertical position relative to the plane in which it is housed (fig. 26).
ATTENTION: During the maintenance operations, the shutoff valve must ALWAYS be connected to the flexible
tubes in a closed position.
3. Disconnect the shutoff valve from NEWA Kanist filter, pulling taps INLET – OUTLET upwards. It is not necessary to take out
the flexible tubes and the outlet blocks from the aquarium, unless they must be cleaned. In this case, remove the possible
incrustation with brushes.
ATTENTION: It is recommended to provide an absorbing material, necessary for wrapping the shutoff valve, because water may
leak out of it during the disconnection.
4. Lift the filter by the grooves located around its perimeter and move to a suitable place for maintenance (for example, a basin,
a sink, a bathtub, etc.), keeping it upright to prevent leakage. Do not grab the filter for the side levers for opening / closing.
5. For detailed instructions on opening the filter, its containers with the filtering materials, and the reassembly of NEWA Kanist
filter, refer to the section "INSTALLATION OF THE FILTERING MATERIALS".
ATTENTION: to facilitate the maintenance operations, it is recommended to drain the remaining water, holding the baskets,
after the rotor unit removal.
6. When the maintenance operations are finished (see: points a) and b)), connect the shutoff valve with taps INLET – OUTLET to
NEWA Kanist filter. Make sure that the former tightly fits the filter rotor unit. Open the shutoff valve, by pulling the green lever
(see also "Connection of the shutoff valve with taps INLET – OUTLET with the external filter").
7. Put the filter into operation, strictly observing the instructions, stated in Section "FILTER START" (point b – Actuation).
Note: it is recommended to periodically lubricate all the rubber parts of the rotor unit applying vaseline oil on the O-shaped
gaskets, the plunger and the pushbutton pad.
a) Maintenance of the impeller:
ATTENTION: the impeller used in NEWA Kanist filters consists of supports and ceramic shaft. It is recommended to
be very careful in its handling during the maintenance operations.
1. Remove the impeller chamber cover (4) from the rotor unit (1), by turning it counter clockwise using the appropriate levers
and gently pull it upwards (fig. 27).
2. Disconnect the ceramic shaft and black rubber support from the impeller cover, and carefully put them on the table. Note: the
second rubber support may remain in place within the housing of the rotor: to extract it is necessary to insert the free end of the
ceramic shaft into the rubber support tag, after the removal of the rotor unit.
3. Take out the rotor group from the cylinder, holding the impeller blades, and rinse the rotor group together with the impeller
cover under running water with non-abrasive brush to remove dirt. In case, the rotor unit is covered with calcium plaque, soak it
in vinegar for 15-20 minutes before cleaning, then rinse thoroughly.
ATTENTION: do not use acids or solutions different from normal vinegar, as they may be toxic to fish.
4. Reassemble the rotor unit: first, insert the ceramic shaft, and then install corresponding black rubber supports on the free end
of the shaft (fig. 28). (5)
5. Install the rotor unit back into the cylinder and install the impeller cover, so that the rubber gasket on the ceramic is correctly
positioned in the impeller cover grooves.
6. Fix the impeller cover on the rotor unit, turning the corresponding levers clockwise.
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