Maintenance And Cleaning - Beretta Ciao 25C Installer And User Manual

ERROR CODE
A10
A11
A20
A30
A40
A41
A42
A60
A70
A80
A90
A91
A58
A59
CFS
SFS
FIL
>3.0 bar

4 MAINTENANCE AND CLEANING

Periodic maintenance is an "obligation" required by the law and is essential
to the safety, efficiency and duration of the boiler. It allows for the reduction of
consumption, polluting emissions and keeping the product safe and reliable
over time. Before starting maintenance operations:
ƒ close the fuel and water taps of the heating and domestic hot water sy-
stem.
To ensure product characteristics and efficiency remain intact and to comply
with prescriptions of current regulations, it is necessary to render the applian-
ce to systematic checks at regular intervals. When carrying out maintenance
work, respect the indications given in chapter "1 WARNINGS AND SAFETY
".
This normally means the following tasks:
ƒ removing any oxidation from the burner
ƒ removing any encrustation from the heat exchangers
ƒ check the state of deterioration of the electrode and, if it is deteriorated,
replace it together with the relative seal
ƒ check and general cleaning of the exhaust and intake pipes
ƒ checking the external appearance of the boiler
ƒ checking the ignition, switch-off and operation of the appliance, in both
DHW and heating mode
ƒ checking the seal on the couplings and on the gas, water and condensate
connection pipes
ƒ checking the gas consumption at maximum and minimum output
ƒ checking the gas failure safety device.
b
During boiler maintenance, the use of protective clothing is
recommended to avoid any risk of personal injury.
b
After carrying out the maintenance tasks, an analysis of the combustion
products is needed to make sure the boiler is working correctly.
b
In the event that, after any replacement of the electronic board,
exchanger, fan/mixer, gas valve, or having carried out maintenance
on the detection electrode or on the burner, the analysis of the
combustion products returns values that are out of tolerance, it is
necessary to repeat the procedure described in paragraph "3.8
Combustion analysis".
b
Do not clean the appliance or its parts with inflammable substances
(e.g. petrol, alcohol, etc.).
b
Do not clean panels, painted parts and plastic parts with paint thinner.
b
Panel cleaning must be carried out only with soapy water.
Cleaning the primary heat exchanger
ƒ Switch off the electrical supply by turning the system's main switch to "Off".
ƒ Close the gas shut-off valve.
ƒ Remove the casing as explained in paragraph "2.5 Removing the casing".
ƒ Disconnect the connecting cable of the electrode.
ƒ Disconnect the power cables of the fan.
ƒ Take out the clip of the fixing ramp (A) from the mixer.
ƒ Loosen the nut of the gas train (B).
ƒ Rotate and take out the gas ramp from the mixer.
ƒ Remove the 4 nuts (C) that fix the combustion unit.
ƒ Take out the air/gas conveyor assembly including the fan and mixer,
being careful not to damage the insulating panel and the electrode.
ERROR MESSAGE
Flame lockout
Condensate drain obstructed
Flue gas exhaust/air suction obstructed
Extraneous fl ame
Limit thermostat
Fan fault
Fill the system
Fill the system
Pressure transducer fault
DHW probe fault
Flow sensor fault
Flow sensor overtemperature
Flow/return sensor diff erential
Return probe fault
Return probe overtemperature
Return-fl ow sensor diff erential
Flue gas probe fault
Clean primary heat exchanger
Low power supply voltage
High power supply voltage
Call Service
Stop for Service
Low pressure - check system
High pressure - check system
DESCRIPTION OF TYPE OF ALARM
ƒ Remove the siphon connecting pipe from the condensate drain fitting of
the heat exchanger and connect a temporary collecting pipe. At this point
proceed with the heat exchanger cleaning operations.
ƒ Vacuum out any dirt residue inside the heat exchanger, being careful
NOT to damage the retarder insulating panel.
ƒ Clean the coils of the heat exchanger with a soft bristled brush.
DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COM-
PONENTS.
ƒ Clean the spaces between the coils using a 0.4 mm thick blade (also
available in a kit).
ƒ Vacuum away any residue produced by the cleaning.
ƒ Rinse with water, being careful NOT to damage the retarder insulation
panel.
b
In case of stubborn deposits of combustion products on the surface
of the exchanger, clean by spraying natural white vinegar, taking care
NOT to damage the retarder insulation panel
ƒ Leave for a few minutes.
ƒ Clean the coils of the exchanger with a soft bristle brush.
DO NOT USE METALLIC BRUSHES WHICH CAN DAMAGE THE
COMPONENTS.
ƒ Rinse with water, taking care NOT to damage the retarder insulation
panel.
ƒ Make sure the retarder insulation panel is undamaged and replace it if
necessary following the relative procedure.
ƒ Once the cleaning operations are finished, carefully reassemble all the
components, following the above instructions in the reverse order.
ƒ To close the fixing nuts of the air/gas conveyor assembly, use a tightening
torque of 6 Nm following the sequence indicated on the diecast (1,2,3,4).
ƒ Turn the power and gas feeding to the boiler back on.
Cleaning the burner
ƒ Switch off the electrical supply by turning the system's main switch to
"Off".
ƒ Close the gas shut-off valve.
ƒ Remove the casing as explained in paragraph "2.5 Removing the casing".
ƒ Disconnect the connecting cable of the electrode.
ƒ Disconnect the power cables of the fan.
ƒ Take out the clip of the fixing ramp (A) from the mixer.
ƒ Loosen the nut of the gas train (B).
ƒ Rotate and take out the gas ramp from the mixer.
ƒ Remove the 4 nuts (C) that fix the combustion unit.
ƒ Take out the air/gas conveyor assembly including the fan and mixer, being
careful not to damage the ceramic insulation panel and the electrode. At
this point proceed with the burner cleaning operations.
ƒ Clean the burner with a soft bristled brush, being careful not to damage
the insulation panel and the electrode.
DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COM-
PONENTS.
ƒ Check that the burner insulating panel and the sealing gasket are unda-
maged and replace them if necessary, following the relative procedure.
ƒ Once the cleaning operations are finished, carefully reassemble all the
components, following the above instructions in the reverse order.
ƒ To close the fixing nuts of the air/gas conveyor assembly, use a tightening
torque of 6 Nm.
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