Soften operating liquid.
OR
De-lime integrated unit.
De-lime integrated unit (pos. D) at regular intervals. (Intervals depend on amount of lime.)
Proceed as follows:
Put on personal protective equipment (gloves and protective glasses).
Shut the system down and secure it so it cannot be switched on again.
Drain the system as described in chapter 8.1 “Draining”, p. 22.
Do not re-attach the cover plate (pos. 064) and the protective grille (pos. 058) to the
condenser.
Remove the pipeline/hose from the threaded nozzle (pos. H) of the integrated unit. To
do so, open the clamp using a special pliers or screwdriver.
Use 10% ethanoic acid as a de-liming liquid.
WARNING: Ethanoic acid can be dangerous! Ethanoic acid can cause serious caustic
burns! Observe the hazardous substance law (Gefahrstoffverordnung) §20, and the
safety data sheet of the manufacturer!
The interior of the integrated unit must be filled with de-liming liquid.
Proceed as follows:
Pour the de-liming liquid into the open threaded nozzle (pos. H) using a funnel. See
“Specifications” chapter for fill quantity. The entire interior of the integrated unit must
be filled with de-liming liquid.
CAUTION: Various seals in the system may be damaged by extended contact with
ethanoic acid. The ethanoic acid may only enter the interior of the integrated unit.
Allow the de-liming liquid to work for at least 30min.
During this time, turn the shaft on the fan wheel by hand occasionally.
Position a collecting container under the system.
Drain the integrated unit. Open the G¼ drain hole (Pos. E) of the integrated unit. The
de-liming liquid flows downwards through the opening in the base of the condenser.
The condenser is not chemically affected by this. Close the drainage hole again.
Attach the removed pipeline/hose to the threaded nozzle (pos. H) of the integrated
unit.
Attach the cover plate (pos. 064) and the protective grille (pos. 058) to the condenser
again.
Re-assemble the system fully.
The de-liming liquid can be poured down the drain.
OR
De-lime the entire system.
Depending on the operating conditions and the lime content of the operating liquid, it may be
necessary to de-lime the entire system. Proceed as follows:
Use citric acid as a de-liming liquid.
Pour citric acid into the system via the fill opening (pos. 007). See the
“Specifications” chapter for the fill quantity of pure citric acid (granulated) for an
average filling of the system with operating liquid.
Run the system approx. 10h with the operating liquid containing citric acid. The citric
acid dissolves the lime.
Then drain the system as described in the “Draining” chapter.
Flush the system repeatedly with clean water.