Kranzle Therm 891 E-ST 48 [22/64] Decalcifying the continuous flow heater

Decalcifying the continuous-flow heater:

Calcifiedmachinesuseanunnecessaryamountofenergybecausethewatercanonly

beheatedslowlyandtheexcesspressurevalvefeedsapartofthewaterbackintothe

pumpcircuit.

Calcified machines can be recognised by increased pipeline resistance.

Checkpipelineresistancebydisconnectingthehighpressurelancefromthegunand

switchingthemachineon.Afulljetofwateremergesfromthegun.Themachinemustbe

decalcifiedifthepressureshownonthemanometerisgreaterthan25 bar.

Proceed as follows to decalcify the machine:

Unscrewthehighpressurehosefromthemachineanddecalcifyitseparately.

Putthedetergentsuctionhoseintoacontainerofdecalcifyingsolution.

Setthedetergentvalvetothemaximumconcentration.

Switchonthemachine.

Holdtheguninaseparatecontainerandpressthetrigger.

Waitforaboutaminuteuntilthedecalcifiercomesoutofthegun

 (recognisablebyitswhitishcolour)

Switchoffthemachineandallowthesolutiontoactforabout15-20minutes.

Switchthemachinebackonandrinsewithclearwaterforabout2minutes.

Nowcheckwhetherpipelineresistanceisbacktoanacceptablelevel.



Repeat the decalcifying process if the pressure without the high pressure lance is

still above 25 bars.



Decalcifiers are caustic!

Observe the instructions for usage and accident prevention. Wear

protective clothing to prevent the decalcifying agent from contacting

your skin, eyes and clothing (e.g. gloves, safety mask etc.)