Maintenance, Trouble Shooting, Service; Preventive Maintenance; Rinsing The Chemical Supply/Injector System; Descaling - Nilfisk FOOD Ecolab Naga Mode D'emploi

9. Maintenance, Trouble
shooting, Service

9.1. Preventive maintenance

Depending on usage, maintenance
should be undertaken 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 knowledge of
the Hygiene Systems and are confident
with the state work safety regulations,
accident preventing regulations, lines
and generally acknowledged technical
regulations such as DIN-norms and VDE-
provisions. 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 contact to the service department.
9.2. Rinsing the chemical supply/
injector system
Remains of detergents or disinfectants
can clog the injector so it needs to be
rinsed or replaced.
The following procedure will clean the
chemical supply for detergents and/or
remains of disinfectants.
1. Hold the rinsing bottle with clean
water tightly against the hose.
Alternatively, you can place the hose
in a bucket of clean water.
2. 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).

9.3. Descaling

• The interval of the Descaling pro-
cedure is depends on the water
hardness.
16
• Make sure the water supply to the
unit is disconnected.
• Remove the Cover from the unit.
• Dismount the injector block.
• Put the injector block in a descaling
bath – make sure the dosing valve
(the knob) is over the surface.
• Wait for 60 minutes.
• Rinse the block in clean water.
• Connect water to the unit.
• 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 - 0.07 MPa.
• Test that the unit can start and stop in
both foam and rinse position
• Reinstall the cover to the unit
The following descaling interwals must
be observed to prevent lime building up
in the unit, that can discontinue operation
of the unit:
°dH ppm Time between
Descaling
0-5 18-90 12 months
5-10 90-180 6 to 12 months
10-15 180-270 3 to 6 months
15-20 270-360 3 to 6 months
>20 >360 1 to 3 months

9.4. Coupling

It is recommended to lubricate all
coupling parts regularly (approx. once a
week) with waterproof grease to prevent
leaks and damage of packings. If the unit
is equipped with a spray gun the piston of
the gun should also be lubricated.
In leaking quick couplings the packings
should be replaced.

9.5. Internal cleaning of the unit

We recommend opening and cleaning
the unit inside min. once a week.