33
925.220.4 - EN
*/4536$5*0/41&35"*/*/(505)&*/45"--&3
(Not fitted on 1.240 i - 1.240 Fi and 1.310 Fi models)
To clean the DHW system it is not necessary to remove the DHW heat exchanger if the assembly is equipped with the
appropriate taps (supplied on demand) placed on the hot water outlet and inlet.
To carry out the purge it is necessary to:
r DMPTFUIFDPMEXBUFSJOMFU
r ESBJOUIF%)8TZTUFNGSPNUIFXBUFSDPOUBJOFEUIFSFJOCZNFBOTPGBIPUXBUFSUBQ
r DMPTFUIF%)8PVUMFU
r VOTDSFXUIFUXPTUPQDPDLTDBQT
r SFNPWFUIFàMUFST
In case the appropriate tap is not supplied it is necessary to disassemble the DHW heat exchanger, as described in the fol-
lowing section, and do the purge aside. We recommend you also purge from limestone deposits the DHW heat exchanger
seat and the NTC sensor fitted on the DHW system.
To purge the exchanger and/or the DHW system we suggest the use of Cillit FFW-AL or Beckinser HF-AL.
28. HOW TO PURGE THE DHW SYSTEM FROM LIMESTONE DEPOSITS
(Not fitted on 1.240 i - 1.240 Fi and 1.310 Fi models)
The stainless steel plate-type DHW heat exchanger is easily disassembled with a screwdriver by operating as described
below:
r ESBJOJGQPTTJCMFPOMZUIFCPJMFSTZTUFN
through the drain tap
;
r ESBJOUIF%)8TZTUFNGSPNXBUFS
r SFNPWFUIFUXPTDSFXT SJHIUJOGSPOUPGZPVTFDVSJOHUIF%)8IFBUFYDIBOHFSBOEQVMMJUPGGJUTTFBU àHVSF
29. HOW TO DISASSEMBLE THE DHW HEAT EXCHANGER
30. CLEANING THE COLD WATER FILTER
31. ANNUAL MAINTENANCE
To optimise boiler efficiency, carry out the following annual controls:
r DIFDLUIFBQQFBSBODFBOEBJSUJHIUOFTTPGUIFHBTLFUTPGUIFHBTBOEDPNCVTUJPODJSDVJUT
r DIFDLUIFTUBUFBOEDPSSFDUQPTJUJPOPGUIFJHOJUJPOBOEáBNFTFOTJOHFMFDUSPEFT
r DIFDLUIFTUBUFPGUIFCVSOFSBOENBLFTVSFJUJTàSNMZàYFE
r DIFDLGPSBOZJNQVSJUJFTJOTJEFUIFDPNCVTUJPODIBNCFS
Use a vacuum cleaner to do this;
r DIFDLUIFHBTWBMWFJTDPSSFDUMZDBMJCSBUFE
r DIFDLUIFQSFTTVSFPGUIFIFBUJOHTZTUFN
r DIFDLUIFQSFTTVSFPGUIFFYQBOTJPOWFTTFM
r DIFDLUIFGBOXPSLTDPSSFDUMZ
r NBLFTVSFUIFáVFBOEBJSEVDUTBSFVOPCTUSVDUFE
r DIFDLGPSBOZJNQVSJUJFTJOTJEFUIFTJQIPOàUUFEPODFSUBJOCPJMFST
r DIFDLUIFNBHOFTJVNBOPEFXIFSFQSFTFOUGPSCPJMFSTàUUFEXJUITUPSBHFCPJMFST
WARNINGS
Before commencing any maintenance operations, make sure the boiler is disconnected from the power supply.
Afterwards, move the knobs and/or operating parameters of the boiler to their original positions.
(Not fitted on 1.240 i - 1.240 Fi and 1.310 Fi
models)
The boiler is equipped with a cold water filter
placed on the hydraulic assembly. To clean it do
the following:
r ESBJOUIF%)8TZTUFNGSPNXBUFS
r VOTDSFXUIFOVUPOUIFáPXTFOTJOHBTTFNCMZ
(Figure 19);
r QVMMPVUUIFáPXTFOTJOHEFWJDFBOEJUTàMUFS
r SFNPWFUIFJNQVSJUJFT
Important
: in the event of replacements and/or
cleaning of the O-rings on the hydraulic unit, do
not use oil or grease as lubricant but exclusively
Molykote 111.
0606_2703 / CG_1839
Figure 19
DHW heat exchanger securing screws
flow sensing securing nut
