Merloni Elettrodomestici
DISHWASHER EVO3
Service manual
EN
03-05-20/0
44-54
Language Issue/Edition
Page
7.1
Regeneration process
Resins are regenerated (
regeneration
) during the rinse stage (the precise
moment depends on the programme).
When the regeneration solenoid is activated, the water in the air break
chamber (approx. 200cc) runs into the salt container whereas the water
already in the salt container runs into the resin container to regenerate the
contents (exchange of calcium and magnesium ions with sodium ions in the
salt).
This ionic exchange lasts 20-25 minutes. Two resin washes will then be
performed; 1 litre of water at a time is filled that removes the salt water
present by way of the resins. One litre at a time is filled to prevent the salt
water escaping from the sump and reacting with the stainless steel tub.
7.2
ITR
(safety thermostat)
A safety thermostat is used to protect the dishwasher, or more specifically, the
heating element. The purpose of this device is to disconnect the electrical
supply to the heating element should the temperature exceed the safe limit.
There are two different ITRs, one on the open heating element which can be
seen between the bars of the element. On the concealed heating element it
has been integrated with the element itself.
Cutoff values are listed in the following table:
7.3
Dispenser
A coil actuator activates the dispenser to dispense both detergent and rinse
aid. The actuator device consists of the following components:
coil
A
door lever
B
rocker arm
C
rinse aid lever
D
pump
E
The energised coil engages the door lever opening it.
Nota:
if salt is not added when the indicator light comes on the resins will ensure the water is softened
for a maximum of 5 more cycles. After this limescale will begin to form.
ITR (concealed heating element)
TR (open heating element)
98±5°C
78±1.5°C
ITR
