Removing Scale From The D.h.w. Circuit; Dismounting The Water-Water Heat Exchanger; Combustion Parameters - Baxi ECO COMPACT Manual Para El Usuario

18.4 REMOVING SCALE FROM THE D.H.W. CIRCUIT

The DHW circuit can be cleaned without removing the water-water exchanger from its housing if the plate was initially provided
with the specific tap (available on request) located on the DHW outlet (see figure in annex "SECTION" F at the end of this manual).
To clean, proceed as follows:
• Close the DHW inlet valve;
• Drain the DHW system by opening a hot water tap;
• Close the DHW outlet tap;
• Remove the clip (1E);
• Remove the filter (2E);
• to replace the DHW NTC probe (D).
If the special tap is not supplied, dismount the water-water heat exchanger, as described in the next section, and clean it separately.
Remove the scale from the seat and relative NTC sensor fitted on the DHW circuit (D). To clean the exchanger and/or DHW circuit,
use Cillit FFW-AL or Benckiser HF-AL.

18.5 DISMOUNTING THE WATER-WATER HEAT EXCHANGER

The stainless steel plate-type water-water heat exchanger is easily disassembled with a screwdriver (see figure in annex
"SECTION" F at the end of the manual ) 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 (B).
Pay great attention when dismantling the individual parts of the hydraulic assembly. Do not use sharp tools, do not apply
excessive force when removing the fixing clip.

19. COMBUSTION PARAMETERS

To measure combustion efficiency and the toxicity of the products of combustion, the boiler is fitted with two dedicated test points.
One connection point is connected to the exhaust duct and is used to measure combustion efficiency and the toxicity of the
products of combustion. The other is connected to the air intake circuit and is used to check for the presence of any products of
combustion circulating in installations with co-axial flues.
The following parameters can be measured at the connection point on the flue gas circuit:
• temperature of the combustion products;
• concentration of oxygen (O
• carbon monoxide (CO) concentration.
The temperature of the comburent air must be measured on the test point located on the air intake flue by inserting the measurement
sensor by about 3 cm.
The combustions analisys shall be done using an analyzer regularly calibrated.
) or, alternatively, carbon dioxide (CO
2
);
2
43 7110102.03 (1-06/13)