58
926.116.5 - en
INSTRUCTIONS FOR FITTERS
The DHW filters and the filters of the heating circuit are housed in special extractable cartridges. The cartridge of the he-
ating circuit is located on the return of the heating (figure 16F), the cartridge of the DHW circuit is on the cold water input
(figure 16E). To clean the filters, proceed as described below:
r UVSOPGGUIFFMFDUSJDQPXFSTVQQMZUPUIFCPJMFS
r UVSOPGGUIF%)8JOMFUUBQ
r ESBJOUIFXBUFSPVUPGUIFIFBUJOHDJSDVJUUVSOJOHPOUBQ"JOàHVSF
r SFNPWFUIFDMJQ &'GSPNUIFàMUFSBTJMMVTUSBUFEJOUIFàHVSFBOEUBLFPVUUIFDBSUSJEHF &'DPOUBJOJOHUIFàMUFS
taking care not to apply excessive force;
r UPFYUSBDUUIFDBSUSJEHFPGUIFIFBUJOHàMUFSZPVNVTUàSTUSFNPWFUIFNPUPSPGUIFXBZWBMWF (àHVSF
r FMJNJOBUFBOZJNQVSJUJFTBOEEFQPTJUTGSPNUIFàMUFS
r SFQPTJUJPOUIFàMUFSJOUIFDBSUSJEHFBOEQVUJUCBDLJOUPJUTIPVTJOHTFDVSJOHJUXJUIUIFDMJQ
r UPDIBOHFUIF%)8/5$TFOTPSTFFàHVSF%
IMPORTANT
when replacing and/or cleaning the O-rings on the hydraulic assembly, only use Molykote 111 as a lubricant, not oil or grease.
29. CLEANING THE FILTERS
The DHW circuit can be cleaned without removing the water-water heat exchanger if the assembly is fitted with the special
tap (available on request) located on the DHW outlet.
To clean, proceed as follows:
r 5VSOPGGUIF%)8JOMFUUBQ
r %SBJOUIF%)8TZTUFNCZPQFOJOHBIPUXBUFSUBQ
r 5VSOPGGUIF%)8PVUMFUUBQ
r 3FNPWFUIFDMJQ&JOàHVSF
r 3FNPWFUIFàMUFS &àH
If the special tap is not supplied, dismount the water-water heat exchanger, as described in the next section, and clean it
separately. Remove the scale from the seat and relative NTC sensor fitted on the DHW circuit (figure 16D).
To clean the exchanger and/or DHW circuit, use Cillit FFW-AL or Benckiser HF-AL.
30. REMOVING SCALE FROM THE DHW CIRCUIT
The stainless steel plate-type water-water heat exchanger is easily disassembled with a screwdriver by operating as
described below:
r ESBJOUIFTZTUFNKVTUUIFCPJMFSJGQPTTJCMFUISPVHIUIFESBJOUBQ
r ESBJOUIF%)8TZTUFN
r SFNPWFUIFUXPTDSFXTBUUIFGSPOUTFDVSJOHUIFXBUFSXBUFSIFBUFYDIBOHFSBOEQVMMJUPVU àHVSF#
31. DISMOUNTING THE WATER-WATER HEAT EXCHANGER
