De Dietrich MS 24 BIC FF - Инструкция по эксплуатации - Страница 81

81

71.06199.02 - EN

INSTALLATION INSTRUCTIONS

The DHW and CH ilters are housed in special extractable cartridges. The CH cartridge is located on the CH return line 
(igure 15F). To clean the ilters, proceed as described below:

•   switch off the boiler;
•   shut the DHW inlet tap
•   drain the water in the CH circuit by opening tap A in igure 15.
•   remove the clip (1-F) from the ilter as illustrated in the igure and take out the cartridge (2-F) containing the ilter, taking 

care not to apply excessive force;

•   to extract the heating ilter cartridge, irst remove the 3-way valve motor (1-2G - igure 15);
•   eliminate any impurities and deposits from the ilter;
•   reposition the ilter in the cartridge and put it back into its housing, securing it with the clip.

WARNING

when replacing and/or cleaning the O-rings on the hydraulic assembly, only use Molykote 111 as a lubricant, not oil or grease.

30. CLEANING THE FILTERS

To clean, proceed as follows:

•   Turn off the DHW inlet tap
•   Drain the DHW system by opening a hot water tap
•   Turn off the DHW outlet tap
•   Remove the clip 1E in igure 15. 
•   Remove the ilter (2E igure 15).

Dismount the water-water heat exchanger, as described in the next section, and clean it separately.
To clean the exchanger and/or DHW circuit, use Cillit FFW-AL or Benckiser HF-AL.

31. REMOVING SCALE FROM THE DHW CIRCUIT

The stainless steel plate-type water-water heat exchanger can be easily disassembled with an M4 spanner by operating 
as described below:

•   drain the system, just the boiler if possible, 

through the drain tap

;

•   drain the DHW system;
•   remove the two screws at the front securing the water-water heat exchanger and pull it out (igure 15B).

32. DISMOUNTING THE WATER-WATER HEAT EXCHANGER

DRAINING THE STORAGE BOILER

Drain the water in the storage boiler as follows:

-   close the water inlet tap;
-   open a user tap;
-   open the relative drain tap (Fig. 2-B);
-   loosen the nut on the DHW outlet pipe at the bottom of the storage boiler.