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926.116.5 - en

INSTRUCTIONS FOR FITTERS

The DHW lters and the lters 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 (gure 16F), the cartridge of the DHW circuit is on the cold water input

(gure 16E). To clean the lters, proceed as described below:

r UVSOPGGUIFFMFDUSJDQPXFSTVQQMZUPUIFCPJMFS

r UVSOPGGUIF%)8JOMFUUBQ

r ESBJOUIFXBUFSPVUPGUIFIFBUJOHDJSDVJUUVSOJOHPOUBQ"JOàHVSF

r SFNPWFUIFDMJQ&'GSPNUIFàMUFSBTJMMVTUSBUFEJOUIFàHVSFBOEUBLFPVUUIFDBSUSJEHF&'DPOUBJOJOHUIFàMUFS

taking care not to apply excessive force;

r UPFYUSBDUUIFDBSUSJEHFPGUIFIFBUJOHàMUFSZPVNVTUàSTUSFNPWFUIFNPUPSPGUIFXBZWBMWF(àHVSF

r FMJNJOBUFBOZJNQVSJUJFTBOEEFQPTJUTGSPNUIFàMUFS

r SFQPTJUJPOUIFàMUFSJOUIFDBSUSJEHFBOEQVUJUCBDLJOUPJUTIPVTJOHTFDVSJOHJUXJUIUIFDMJQ

r UPDIBOHFUIF%)8/5$TFOTPSTFFàHVSF%

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 tted with the special

tap (available on request) located on the DHW outlet.

To clean, proceed as follows:

r 5VSOPGGUIF%)8JOMFUUBQ

r %SBJOUIF%)8TZTUFNCZPQFOJOHBIPUXBUFSUBQ

r 5VSOPGGUIF%)8PVUMFUUBQ

r 3FNPWFUIFDMJQ&JOàHVSF

r 3FNPWFUIFàMUFS&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 tted on the DHW circuit (gure 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 ESBJOUIFTZTUFNKVTUUIFCPJMFSJGQPTTJCMFUISPVHIUIFESBJOUBQ

r ESBJOUIF%)8TZTUFN

r SFNPWFUIFUXPTDSFXTBUUIFGSPOUTFDVSJOHUIFXBUFSXBUFSIFBUFYDIBOHFSBOEQVMMJUPVUàHVSF#

31. DISMOUNTING THE WATER-WATER HEAT EXCHANGER

Baxi Fourtech Series User Manual

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