Aqua Medic K Série Mode D'emploi page 9

2. Principle of operation
The skimmer with venturi pump has to be placed in a separate filter tank. The water is pumped to the skimmer
by the venturi pump. The pump draws water from the filter tank and mixes it with air. Within the pump housing,
the bubbles are cut into very fine pieces by the Aqua Medic Power Wheel. The air/water mixture is pumped back
into the skimmer. The treated water flows through the outlet out of the skimmer back into the filter tank.
3. Venturi pump
The DC Runner series of magnetically coupled centrifugal pumps are very quiet in operation. They have fully
encapsulated synchronous motors. All materials are saltwater resistant.
The polished ceramic shaft and bearing is practically wear-resistant, ensuring a long operating life. The pumps
can easily be taken apart for cleaning. The direction of the rotation is controlled electronically. This enables a
very efficient operation.
3.1. Connections
Suction side: The included air injection nozzle is placed at the pump's suction side.
Pressure side: The pressure side is connected to the skimmer by the existing connection by a piece of hose.
Please make sure that the O-rings (Fig. 1, No. 18 + 24) are placed into the groove.
If possible, mount the pump horizontally for best air power and quiet operation.
3.2. Setup of the pump
The pump DC Runner is operated by an electronic safety transformer at AC 110 – 240 V / 50 – 60 Hz and 24 V
DC output. To open the pump, remove retaining plate and release the pump lock by turning it. After setting the
pump up, please ensure you can always reach the power plug easily.
Safety advices
The pump is constructed for indoor use only. Before working on the aquarium or pump, the power
plug has to be disconnected from the mains. The connection cable and the power plug must
not be changed. If the power cable is damaged, the pump must be scrapped.
3.3. DC Runner Controller
Please refer to the attached manual.
3.4. Maintenance / Cleaning the pump
Depending on contamination, the pump and Power Wheel have to be cleaned occasionally, at least in two-months
intervals, if necessary more frequently.
First of all, remove the retaining plate. Then, take off the pump lock. Now, the complete impeller can be taken
out.
4. Starting the skimmer
 The air tube has always to be installed upward over the water level in the skimmer. This air tube must not
hang down. Therefore, it should always be connected to the silencer (Fig. 1, No. 5). The silencer has to be
put into a borehole of the foam cup's lid. Connect the bottom end of the tube to the air intake of the pump.
The foam cup is simply inserted into the skimmer's housing from the top.
 The ideal water level for each skimmer is listed in the table. With higher or lower water levels, airflow rate and
skimming power will decrease. The filter sump should either contain an overflow edge that keeps the water
level in the ideal range or it should be equipped with an automatic refill unit, such as Aqua Medic Refill System.
 The skimmer will be filled by starting the venturi pump on a low level. A very quick water flow leads to very
fast overflowing of the foam cup. Here, special caution is required, if one connects the outflow nozzle of the
foam cup via a hose with a container standing beside the filter sump. There is the danger that the container
overflows if the skimmer cooks over. Thus, this would also lead to strong loss of water in the filter sump
whereby other devices could run dry and therefore, could be damaged. The flow should be adjusted by using
the adjusting screw (Fig. 1, No. 6) and / or the pump controller so that a nearly dry foam will be produced.
There is an arrow on the adjusting screw. If it points to the skimmer, the outlet is set to the lowest level.
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