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Idiomas disponibles
Idiomas disponibles
Fig. 10 – Correct positioning of the
level probe connector.
ROUTINE MAINTENANCE
Routine and thorough maintenance, together with a scheduled inspection, guarantee system conservation and proper
operation over time.
We therefore advise you to follow our routine maintenance tips and to stipulate a scheduled service and assistance
contract with a trusted Technical Assistance Centre.
Check pump operation at least every 6 months. In case of intensive use of the metering pump, it is recommended to
increase the frequency of the checks.
Check that no deposits have formed in the heads, in which case they can be removed by disassembling the piece and
washing it thoroughly with water. For deposits that are difficult to remove, it is recommended to immerse the head in an aqueous
solution of hydrochloric acid, then rinse the piece thoroughly with water.
Regularly check the seals of the check valves, the diaphragm and all the seals, as they may deteriorate over time as parts
of normal wear.
To replace the diaphragm, unscrew the 4 screws, unscrew the diaphragm, replace it together with the O-Ring, reassemble
everything taking care to tighten the screws evenly (alternatively screw in crisscross fashion respecting the tightening torque
requirement (see Annex 1)
Regularly check the correct tightness of the injection valve, replacing it if required, as it may be subject to deterioration
due to wear and performing a check may can cause the dispensed product to return to the pump.
Caution: When removing the metering pump from the system, carefully remove the tube from the delivery fitting,
as any residual additive inside the tube may escape. Also in this case, the chassis must be clean should it come into
contact with the additive.
Caution: when the power supply is disconnected, the pump may emit one or more pulses, therefore make sure
the pump is fully switched off before disconnecting the tubes.
The maintenance times listed below are to be considered for theoretical purposes only, their variability will depend on
various factors: type of system, type of product dispensed, environment where the pump is installed, etc.
Before carrying out any maintenance or cleaning operations on the metering pump, it is required to:
1) Check that it is disconnected from the electrical mains (both polarities) by extracting the conductors from the contact
points of the mains and spacing the contacts by at least 3 mm.
2) Discharge the pressure present in the pump head and in the delivery pipe in the most suitable way (paying the utmost
attention).
In the event of leaks from the hydraulic system of the pump (breakage of a valve or pipe), its operation must be stopped,
the delivery pipe must be depressurised by adopting the appropriate precautions (gloves, goggles, protective clothing).
30 ENGLISH
Level probe connection: connect the probe cables to PIN 3 and 4 of the
connector (3) and follow the previous instructions in this paragraph. When the
height inside the tank of the product to be dispensed drops below the minimum
preset level, the contact closes and after approximately 3 seconds the metering
pump stops dispensing, signalling the alarm via the LED (8) which remains red.
The delay in stopping the metering pump serves to prevent any disturbances in
the liquid level in the suction tank from triggering false alarms. As soon as the
contact reopens, the pump resumes operation in the mode that was active
before it was stopped.
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