DISHWASHER INO 81
Code NU271706-02/04
Chap. 5 – Page 2
To enable us to guarantee this equipment, it is necessary to carry out the following maintenance operations:
5.1.5 Dismantling of the rotary arms
to free a choked nozzle
* Partly unscrew the nut, pull the rotary arm by bearing on the nut then finish unscrewing the nut and remove the rotary
arm. Free the choked nozzle in question and clean the rotary arm. Drive the rotary arm on its conical pin and screw
on the nut.
5.2. PREAMBLE RELATING TO STAINLESS STEELS
* Stainless steel
is a grade of steel designed so that a thin protecting layer covers the metallic surface
and protects it against corrosion. (Oxide film resulting from the chemical reaction of oxygen on the metal
surface).
Any element hindering the formation of this layer or facilitating its part destruction (food residues,
overflow, stagnant liquids...) diminishes the resistance of stainless steel to corrosion.
*
If the composition of certain stainless steels
enables them to resist to certain chemical aggressions
better than classical steels,
you must not imagine that “stainless steel” is indestructible.
3 main factors of corrosion are to be closely checked:
The chemical environment. In general :
Brines (salt concentration, sauerkraut...)
Chloride, contained especially in:
cleaning products, bleach.
The temperature:
The aggressiveness of any chemical environment as
designated above to stainless steel increases
considerably with temperature.
The duration:
The longer the contact time between stainless steel
and the chemical environment, the more the
consequences of corrosion will be noticeable.
The combination of these three factors may lead to the destruction of the walls, even if they are
manufactured with very high quality stainless steel.
Note that when stainless steel is corroded, it is extremely rare that this is due to the steel itself.
Generally speaking, unadapted or wrongly used maintenance products, defective maintenance or
extreme conditions of use, are often at the origin of the damage met.
W
ARNING
!
The builder will not be held responsible for cases of corrosion met in these conditions, and no
guarantee will then apply.
A list of the most frequent cases met is given hereunder in order to enable you to identify as
accurately as possible these bad conditions of use, and to operate your equipment as long as
possible.
