Operating Mode; Connections; Vent Connection; Check Valve - DAB FEKAFOS 1200 Instrucciones Para La Instalación Y El Mantenimiento

These systems incorporate pumps with knife grinder systems, which chop up the solids and are therefore always
in contact with the liquid to be lifted. In constant duty conditions, wear of the grinder knives means that constant,
continual maintenance is required to maintain rated performance levels.
2.2.1

Operating mode

When the liquid in the tank reaches the level at which the electric pump control float switch contact is closed, the
pump starts, gradually emptying the tank. The pump stops when the liquid reaches the minimum level at which
the float switch contact is opened. When two electric pumps are installed, the second pump starts after the first
and only if the latter is unable to transfer all the liquid arriving from the various inlets to the sewer. An additional
float switch may be installed higher up than the others in the pumping station, to signal an excessively high level
of liquid in the tank.
2.3

CONNECTIONS

2.3.1

Vent connection

Tank vents should always be connected to a ventilation pipe, if
available.
If the location does not have a ventilation pipe, a PVC pipe must be
connected to the system's safety vent, with the outlet end at a level
above the maximum level of the liquid in the tank.
Various national regulations may require different ratios between the
outlet and vent pipe diameters.
This pipe must always be fitted with an anti-fouling device (protective
grille) and must be inspected periodically to guard against blockages.
2.3.2

Check valve

Install a check valve on the pipeline connecting to the public/private
sewer system. This prevents the flowback of liquids. Install the valve at
least 1 metre from the lifting station to enable the flow of liquid
delivered by the pump to open the valve shutter (unless otherwise
recommended by the manufacturer). Always refer to the relevant local
and/or national regulations, laws and standards.
Check valves are available as accessory kits.
2.3.3

Gate stop valve

Install a stop valve both on the inlet pipeline and on the delivery line (connecting to the public/private sewer
system). This allows maintenance work to be done without having to empty the entire system. Gate valves or ball
valves can be used.
Stop valves are available as accessory kits.
2.4

ELECTRICAL CONNECTIONS AND FLOAT SWITCH ADJUSTMENT

Make sure that the gradient between the pump and the sewer system is compatible with the
pump's rated performance.
2.4.1

Choosing the electrical control panel

Check that the electrical data of the panel and pump are compatible.
An incorrect combination may cause malfunctions and not provide the motor with the necessary
protection.
Always refer to the pump manual and the instructions supplied with the electrical panel
ENGLISH
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SOLUTIONS
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