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PRIMING
Slightly open the bleed valve and set the manual operation at the maximum dosing frequency, to facilitate priming of the
pump. When the product to be dosed protrudes from the purge tube, close the valve.
Sometimes it is more effective slightly loosen the bleed valve, wait 4-5 seconds, close it, wait a few seconds and repeat the
operation.
Warning!
Before performing any kind of operation on the pump, carefully read the HSDS of the chemical to be
dosed, in order to define the proper behaviors to be followed, and the personal safety equipment to be worn.
ELECTRICAL CONNECTIONS
The EFka300 is supplied already wired internally and complete with power cable (without plug).
This is the only electrical connection to be performed by the customer.
Standard power supply: 230 V
∼
, 50 Hz, monophasic.
Carefully follow all the rules of electrical safety.
Before starting the unit, check that all electrical and plumbing connections have been properly executed.
The measure inputs from pH and redox electrodes are available on BNC connectors, while inputs for level sensors
(one for each pump) and flow sensor are available on special connectors that allow an extremely fast and easy connection
even for unskilled personnel.
Note:
the pH and redox inputs should never be left open; if an input is not used, you need to short-circuit it.
Level Control
The system is supplied already configured for disabling the dosage in case of low level in the tank. The
level control is made through a specific float sensor (optional, see “Accessories and spare parts”), to be
connected to pins 3 and 4 of the LEV connector (see Figure).
When the product level in the tank falls below the level sensor, the unit stops dosing and the fault is
shown on the display.
The alarm condition is generated with a delay of a few seconds compared to the detection of low level, to
avoid errors due to extreme situation (such as water surface).
Two inputs for level sensor are available, one for each pump/tank.
Flow Control
The system is supplied already configured for disabling the dosage in case of lack of water flow.
The control is made through a SPDT contact to be connected to pins 3 and
of the FLOW connector
(see Figure). A specific flow sensor is also available (optional, see “Accessories and spare parts”).
