Product Solenoid Valve; Preventive Maintenance; Rinsing The Chemical Supply/Injector System; Change Of Injector - Nilfisk FOOD MA2CM Mode D'emploi

9.2.4.

Product solenoid valve

Maintance free.
If defective, replace the product solenoid valve and/or
replace chemical supply hoses.
Warning: Risk of chemical residue.
Wear protec tive gear.
1. Turn off power supply.
2. Remove valve with a slot-head screwdriver.
3. Change valve and/or hoses. Be ware of flow
direction marked on bracket.
4. Mount the valve in the bracket.
The flow direction is marked on the
bracket. The flow of chemical supply is
in the direction of the arrow with the tip
pointing towards the automatic block.
Do NOT use the marking printed on
the solinoid valve.

9.3. Preventive maintenance

Depending on usage, maintenance should be un-
dertaken by an authorised service engineer at least
once a year in order to prevent defects and failure of
operation. Authorised engineers are persons who due
to their skills and experience have sufficient knowl-
edge of the Hygiene Systems and are confident with
the state work safety regulations, accident preventing
regulations, lines and generally acknowledged techni-
cal regulations such as DIN-norms and VDE-provi-
sions. For your safety, this cleaning unit has been
manufactured according to all relevant regulations
valid in the EU and therefore it has been supplied with
the CE-marking. For further information, please refer
to the service department.

9.4. Rinsing the chemical supply/injector system

The chemical supply must always be
rinsed thoroughly after use.
Remains of detergents or disinfectants can clog the
injector so it needs to be rinsed or replaced.
The following procedure will clean the chemical sup-
ply for detergents and/or remains of disinfectants.
1. Remove User Pack, if any.
2. Hold the rinsing bottle with clean water tightly
against the suction opening (with User Pack) or
against the hose (without User Pack). Alternati-
vely, you can place a User Pack with clean water
in the holder or – without User Pack – place the
hose in a bucket of clean water.
3. Activate the hose handle until clean water comes
out of the nozzle (approx. 30 seconds).
This procedure should be
followed both on the detergent
and the disinfectant side (if this is
installed).

9.5. Change of injector

1. Turn off power supply.
2. Turn off water and air supply.
3. Depressurise the system.
4. Unscrew and change injector. Beware of chemi-
cal residue.
5. Reconnect water, air supply and power supply.
WARNING
Risk of chemical residue.
Wear protective clothing.
CAUTION
The unit might be hot.
Ensure sufficient cooling time.

9.6. Deliming

The interval of the deliming procedure depends on
the water hardness. Please see table in the end of
this section.
9.6.1.

Manual block

1. Make sure the water and the power to the unit is
disconnected.
2. Remove the cover from the unit.
3. Depressurise the system.
4. Dismount the injector block, product non-return
valve, air valve and air non-return valve including
the air fittings.
5. Rinse the injector block in the clean water.
6. Place the injector block and product non-return
valves in a deliming bath - make sure the selector
knob is over the surface.
7. Wait for 60 minutes.
8. Rinse the injector block in clean water.
9. Mount the air valve, air non-return valve and
product non-return valve on the injector block
and mount the injector block in the unit.
10. Reconnect water to the unit.
11. Test the unit in foam position make sure the
vacuum is sufficient, it is recommended to be
between 14,8-20,7 inHg/-0,05-0,07MPa.
12. Test that the unit can start and stop in both foam
and rinse position.
13. Reinstall the cover on the unit.
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