Clean The Heat Exchanger; Checking The Burner - Baxi LUNA DUO-TEC MP 1.90 Instructions Manual For Users And Installers

18.2 CLEANING THE HEAT EXCHANGER FUMES SIDE
Proceed as follows to clean the heat exchanger:
Disconnect the boiler from the mains power supply.
Close the gas inlet valve.
Remove the front cover from the boiler.
Lower the electrical box, ensuring it is protected against contact
with water.
nuts M6 and the connector under the mixer.
Protect the rear insulating panel (2) against water with a waterproof
Accurately suck up the residue inside the combustion chamber and
remove any scale, using a brush with plastic bristles available in
the cleaning kit.
Sprinkle the surfaces to be cleaned (1) generously with the appro-
priate liquid BX-HT Cleaner or similar using the appropriate spray
bottle and wait 10 minutes (other products may be used, after con-
sulting the authorised technical assistance service). Brush without
rinsing and apply BX-HT Cleaner again. Let 10 more minutes pass,
then brush again. If the result is not satisfactory, repeat the ope-
ration.
To reassemble, proceed in the inverse order, tightening the 6 nuts

18.3 CHECKING THE BURNER

The burner needs no cleaning.
Check the burner surface for damage, replace the burner if necessary.
7,5 ±1 (1.90)
5,0 ±1 (1.110)
a Flame detection probe
b Ignition electrode
c Burner
d Burner surface insulation
CG_2190
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b
a
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2
1
c
d