Cleaning The Filters; Removing Scale From The Dhw Circuit; Dismounting The Water-Water Heat Exchanger; Disassembling The Boiler Anode - Baxi Nuvola 3 BS 40 Series Operating And Installation Instructions

The DHW and CH filters are housed in special extractable cartridges. The CH cartridge is located on the CH return line
(figure 20F). To clean the filters, proceed as described below:
WARNING
when replacing and/or cleaning the O-rings on the hydraulic assembly, only use Molykote 111 as a lubricant, not oil or grease.

32. REMOVING SCALE FROM THE DHW CIRCUIT

The cleaning of the DHW circuit can be carried out without removing the water-water exchanger from its housing if the
plate has been initially provided with the specific tap (on request) located on the DHW outlet.
To clean, proceed as follows:
If the special tap is not supplied, 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.

33. DISMOUNTING THE WATER-WATER HEAT EXCHANGER

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

34. DISASSEMBLING THE BOILER ANODE

Check the state of the protective magnesium anode on
an annual basis
(before proceeding, empty the boiler circuit using the
relevant drain tap).
To disassemble the anode unit loosen the support nut (A)
using a 27 mm fixed wrench.
INSTRUCTIONS FOR FITTERS

31. CLEANING THE FILTERS

through the drain tap
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A
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