Stop; Adjustment Of Detergent; Adjustment Of Air; Maintenance, Trouble Shooting And Service - Nilfisk-Advance FOOD Hybrid SU21 Directions For Use Manual

2. Select requested function. Use the unit according
to the "User Guide".
7.1.2.

Stop

1. Close the water supply (layout drawing).
2. Close the air supply (layout drawing).
3. Deactivate chemical supply by pulling up the suc-
tion hose or removing the userpack.
Due to the following it is very important
to close water, air and chemical suplly
when the unit not in use.
• If the air supply is open when the unit
is not in use - air might seep into the
water pipe - which means that the
system has to be bled again.
7.1.3.

Adjustment of detergent

Remove cover from the unit.
Adjustment of detergent can be done either by means
of a limiting nozzle or by means of a dosing valve
(layout drawing).
The limiting nozzle is placed in the suction nipple of
the non-retur valve (110003529) and can be re-
placed with a smaller or larger nozzle depending on
the concentration needed, please also see table for
guidelines.
All tests have been made with Topax 12
Nozzle size in mm Concentration by 20 Bar in %
0,4
0,5
0,6
0,7
0,8
0,9
1,0
1,1
1,5
16
Remove the cover from the unit.
The dosing valve (optional) is placed on the bracket
above the injector block. (layout drawing)
Adjust the valve by turning counter clock wise for
lower concentration and clock wise for higher con-
centration, as guideline we can inform you that by a
setting of approx. 2 the concentration will be approx.
2,5%, tested with Topax 12.
In order to get your equipment adjusted properly we
recommend that your chemical supplier adjust it for
you for a clock wise measurement of the detergent in
use.
7.1.4.
Remove the cover from the unit.
Adjust the air pressure on the reduction valve until an
appropriate foam quality is reached.

7.2. Maintenance, trouble shooting and Service

Maintenance Instructions
110003529
1. Quick couplings; it is recommended to lubricate
all couplings parts regularly, approx. once a
month) by water proof grease to prevent leaks
and damage of o-rings.
2. If the quick couplings leak, o-rings should be
replaced.
3. 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
0,75
persons who due to their skills and experience
1,15
1,65
2,20
2,90
3,60
4,40
5,3
9,4

Adjustment of air

When setting the regulator, carefully
pull up the knob and turn it clockwise
for pressure increase and counter clock
wise for pressure decrease.
110003528