Freestyle 80 - Heat Exchanger Circuit Cleaning

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WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
)GNITOR
33 Maintenance (continued)
Procedure For Cleaning Of Internal Heat
Exchanger Circuit
4HISPROCEDUREISINTENDEDASAGUIDELINEFORACORRECTRESTORATION
OFTHEFUNCTIONALITYOFTHEBOILERASARESULTOFOPERATIONWITH
UNTREATEDWATERVERYHARDWATERFEEDINGCONDITIONSDEBRISLIME
scale, sludge, metal oxides and, in low temperature systems, also
biomass in the heat exchanger water circuit.
s #AREFULLYREADANDFOLLOWTHEINSTRUCTIONSBELOW
s #LEANINGANDMAINTENANCEMUSTBECARRIEDOUTBYPROFES-
sionally qualified personnel, in compliance with the current
REGULATIONSANDACCORDINGTOTHEMANUFACTURERSINSTRUCTIONS
Do not carry out any operation on the sealed control parts.
s "EFORECARRYINGOUTANYCLEANINGORMAINTENANCEOPERATION
DISCONNECTTHEUNITFROMTHEELECTRICALPOWERSUPPLYUSING
THESWITCHANDORTHESPECIALCUTOFFDEVICES
s 4HEDISPOSALOFCHEMICALSANDRESIDUESOFCLEANINGSHOULD
be carried out in an appropriate manner, in accordance with
current standards.
s BEFOREINSTALLATIONOFTHEBOILERCAREFULLYmUSHALLTHEPIPESOF
THESYSTEMTOREMOVERESIDUESORIMPURITIESTHATCOULDAFFECT
THEPROPEROPERATIONOFTHEUNIT5SECHEMICALCONDITIONERS
THATARESUITABLEFORTHEPURPOSE4HEPRODUCTSUSEDMUST
NOTBECORROSIVEANDORAGGRESSIVEFORMETALSANDPLASTICS
s )FITISNECESSARYACLEANINGOFTHEHEATEXCHANGERCIRCUITTO
RECOVERYTHEFUNCTIONALITYOFTHEBOILERASARESULTOFOPERA-
TIONWITHUNTREATEDWATERVERYHARDWATERFEEDINGCONDI-
tions, sludge, metal oxides and, in low temperature systems,
also biomass in the heat exchanger water circuit, is allowed
THEUSEOFCHEMICALPRODUCTSFORTHECLEANINGIFANDONLYIF
THEMANUFACTUREROFTHESEmUIDSPROVIDESAGUARANTEEWHICH
ENSURESTHATITSPRODUCTSARESUITABLEFORUSEANDCAUSENO
damage to the heat exchanger or other components and /
ORMATERIALSOFTHEBOILERANDSYSTEM
3YSTEMSUPPLY
$OMESTICHOTWATEROUTLET
3 Gas inlet
$OMESTICCOLDWATERINLET
3YSTEMRETURN
0LASTICSCREW#OMBI 
BOILERPUMPDRAIN
2EFRACTORY
(EATEXCHANGERCOVER
PLATEANDGASKET
Burner and
BURNERGASKET
(EAT%XCHANGER
3PRING
Figure 144(EATEXCHANGERCOMPONENTS
Figure 145(EATEXCHANGERCOMPONENTS
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