n
Cleaning the plate exchanger
If descaling of the plate exchanger is necessary, proceed as follows:
1. Close the main water valve.
2. Drain the boiler.
3. Remove the air vent hose above the siphon.
4. Remove the siphon.
5. Remove the clip holding the heating flow hose in place on the left
side of the hydroblock.
6. Dismantle the heating flow hose on the left side of the hydroblock
and not on the heat exchanger side (heating circuit).
7. Unscrew the 2 hexagonal socket screws located to the right and
left of the plate exchanger.
8. Slightly turn the plate exchanger and carefully remove it from the
boiler.
9. Clean the plate exchanger with a descaling product (e.g. citric acid
with a pH of approximately 3). To do this, a specific cleaning
appliance is available as an accessory. After cleaning, rinse
thoroughly under running water.
10.Re-assemble all of the components.
T001622-C
3
4
5
6
7
7
3
2
1
8
H
2
O
2
1
+/+ H
2
O
7. Checking and maintenance
Calenta 25s - 28c - 35s - 40c
80
040412 - 7600585-01
