ENG - Manual of installation, use and maintenance.
210-0352_libretto_WHC_ATI_eng.docx
39
Jan-19
31.
SERVICING THE HEAT EXCHANGER
In case of particularly hard water, it is necessary to perform the cleaning of the exchanger periodically. This type of cleaning is
performed by means of a 3-way valve installed in the appliance, used to circulate a descaling detergent. Use detergents suitable
for limestone cleaning only, not aggressive towards materials such as steel, copper and brass. Follow the instructions below for a
thorough cleaning.
IMPORTANT:
The operation must be performed only by our authorized service centres.
1.
Isolate the appliance electrically.
2.
Close the shut-off valves installed in the circuit external to the device.
3.
Unscrew the plugs from the 3-way valve assemblies as shown in the picture on
the left.
4.
Connect the appliance for the exchanger cleaning to the G 3/4 "connections
instead of just removed caps.
5.
Turn the lever 90 ° as shown in the picture below. In this way the flow is deviated in the indicated outlet.
6.
Start the cleaning cycle for the necessary time.
7.
At the end of the cleaning cycle, you must perform a thorough rinsing of the
heat exchanger to remove any residual detergent used during the cleaning.
8.
After the rinse cycle of the exchanger, close the 3-way valves with the caps
removed earlier.
9.
Return the levers 90 ° to the initial position.
10.
Reopen the shut-off valves.
11.
Make sure there are no leaks along the system.
12.
Reconnect the appliance.
32.
PERIODIC MAINTENANCE
To ensure a safe use of the appliance and to extend its working life, it is advisable to have it checked at least once a year by an
authorized service centre that will act as follows:
Replacement of the magnesium anode
internal inspection of the boiler and possible cleaning of calcium deposited at the bottom of the tank
check of the gas pipe tightness
heat exchanger maintenance
33.
WARRANTY VALIDATION
The warranty starts from the date of purchase proved by a document valid for tax purposes (invoice or receipt): it is essential in
order to take advance of the right to the guarantee.
For further details regarding the warranty terms, see the warranty certificate supplied with your appliance. The guarantee
certificate must be stored together with the purchase document (invoice or receipt) and must be shown to the authorized
service centre in the event of a warranty claim. The only possession of the appliance does not give right to exercise the
guarantee claim.
IMPORTANT:
Tampering any device factory calibrated and sealed by the manufacturer is absolutely forbidden.
