05/02/2021 Rev.1
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4.2 Periodic maintenance
Liquid’s level in the tank should be monitored regularly and the tank refilled a
necessary to avoid the running dry of the pump. Wet parts of the pump, foot
valve, suction/delivery valves and the head and diaphragm should be inspected
and cleaned at least every 3 months. Where very aggressive chemicals are
being dosed, (Sodium Hypo chlorite is particularly difficult) this period may
need to be reduced and cleaning be carried out more frequently. If pumps are
not used for long periods, scale, sediment and encrustation deposits can build
up causing the pump to malfunction. We highly recommend careful
maintenance of the valves by running them under clean water after long
periods of non use. Alternatively, if the pump has not been used for long
periods, before re-setting up the operations, we strongly recommend operating
it for at least 30 minutes with the foot filter immersed in clean water to flush the
pump.
4.3 Basic maintenance procedures
Before doing any maintenance read with attention the technical and safety characteristic of the dosing
chemicals and follow the next procedures:
1 Turn off the pump and immerse the foot filter and the injection tube in clean water. Turn on the
pump to let the water go through the pump head. If there are some crystals to be cleaned follow the
next procedures:
2 Immerse the foot filter and the injection tube into an adequate solution to remove the crystals (ex.
Chloridric Acid for Sodium Hipochlorite crystals); let the pump work for some minute. Then repeat the
action with water and connect the pump to the plant.
ATTENTION!!!!!
It’s necessary to effectuate all the operations with gloves and glasses
suitable for the product used then consult the supplier of the chemical
product.
4.4 Replacing worn parts
Fuse replacement.
Proceed as follows:
1. Put at minimum the knob of the piston regulation of the run (in the pump where it is present)
2. Unscrew the fixing screws of the box
3. Open the front and the back part of the box minding the spring of the knob where it is present.
4. Replace the fuse that is well visible.
5. Assemble all the parts paying attention that the piston regulation knob (where it is present) is at the
minimum position and that the spring is in.
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