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Les langues disponibles
Unit cycle
tw
fig. 31 - Unit cycle
R-SB-W Thermostats/Pressure switches
OH
OIl pre-heater
OW
Operation enabling contact
M
Burner motor
Z
Ignition transformer
BV
Electromagnetic valve
FR
Photoresistance
A'
Starting with pre-heater
A
Starting without pre-heater
B
Flame present
C
Normal operation
D
Adjustment stop (TA-TC)
t1
Pre-ventilation time
TSA
Safety time
t3
Pre-ignition time
t3n
Post-ignition time
tw
Pre-heating time
Output signals from the unit
Necessary input signals
Checks during operation
•
Ignite the appliance as described in sec. 2.3.
•
Check that the fuel circuit and water systems are airtight.
•
Check the efficiency of the flue and air-fume ducts while the boiler is working.
•
Check that the water is circulating properly between the boiler and the systems.
•
Check the proper ignition of the boiler by performing various tests, turning it on and
off with the room thermostat or remote control.
•
Check that the burner door and fume chamber are tight.
•
Check that the burner works properly.
•
Analyse the combustion (with the boiler unit stable) and check that the content of
CO
in the fumes is between 11% and 12%.
2
•
Check the parameters are programmed correctly and perform any required custom-
ization (compensation curve, power, temperatures, etc.).
4.3 Maintenance
Periodical check
To ensure correct operation of the unit over time, have qualified personnel carry out a
yearly check, providing for the following:
•
The control and safety devices must function correctly.
•
The fume exhaust circuit must be perfectly efficient.
•
Check there are no obstructions or dents in the fuel supply and return pipes.
•
Clean the filter of the fuel suction line.
•
Measure the correct fuel consumption
•
Clean the combustion head in the fuel outlet zone, on the swirl disc.
•
Leave the burner running at full rate for approximately ten minutes, then analyse
the combustion, checking:
-
All the elements specified in this manual are set correctly
-
Temperatures of the fumes at the flue
-
CO2 percentage content
•
The air-fume end piece and ducts must be free of obstructions and leaks
•
The burner and exchanger must be clean and free of deposits. For possible clean-
ing do not use chemical products or wire brushes.
•
The gas and water systems must be airtight.
•
The water pressure in the cold water system must be approx. 1 bar; otherwise, bring
it to that value.
•
The circulating pump must not be blocked.
•
The expansion tank must be filled.
•
Check the magnesium anode and replace it if necessary.
The boiler casing, control panel and aesthetic parts can be cleaned with a soft
A
and damp cloth, if necessary soaked in soapy water. Do not use any abrasive
detergents and solvents.
40
EN
t3n
t1
t3
TSA
Boiler cleaning
1.
Disconnect the power supply to the boiler.
2.
Remove the front top and bottom panel.
3.
Open the door by undoing the knobs.
4.
Clean the inside of the boiler and the entire path of exhaust fumes, using a tube
brush or compressed air.
5.
Then close the door, securing it with the knob.
To clean the burner, refer to the Manufacturer's instructions.
Burner disassembly
•
Remove the cover (B) by undoing the screw (A), thereby making all the accessories
accessible.
•
Undo the nut (C) and position the burner so as to access the nozzle.
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 22 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdown (marked with the letter "A"): to restore
operation, press the RESET button (detail 8 - fig. 1) for 1 second or RESET on the op-
tional remote timer control if installed; if the boiler fails to restart, it is necessary to elim-
inate the fault indicated by the operation LEDs.
Faults marked with the letter "F" cause temporary shutdowns that are automatically reset
as soon as the value returns within the boiler's normal working range.
Table. 4 - List of faults
Fault
Fault
code
A01
Burner block
Flame present signal with
A02
burner off
Overtemperature protec-
A03
tion activation
A04
Card parameter fault
Preheater fault (the con-
F07
tact fails to close within
120 seconds)
F09
Card parameter fault
cod. 3540S526 - Rev. 00 - 09/2013
ATLAS D UNIT
fig. 32 - Burner disassembly
Possible cause
Cure
Pump blocked
Replace
Faulty electric motor
Replace
Faulty oil valve
Replace
No fuel in tank, or water on bottom
Refill with fuel or suck the water
Oil line supply valves closed
Open
Dirty filters (line-pump-nozzle)
Clean
Pump unprimed
Prime and find the cause of unpriming
Ignition electrodes not properly adjusted, or
Adjust or clean them
dirty
Nozzle clogged, dirty or deformed
Replace
Unsuitable head and shutter adjustments
Adjust
Faulty electrodes or earthed
Replace
Faulty ignition transformer
Replace
Faulty electrode wires or earthed
Replace
Electrode wires deformed by high tempera-
Replace and protect
ture
Faulty valve or transformer electrical connec-
Check
tions
Broken pump-motor joint
Replace
Pump inlet connected to return pipe
Correct the connection
Faulty photoresistance
Replace
Dirty photoresistance
Clean the photoresistance
Photoresistance short circuit
Replace photoresistance
Extraneous light strikes the photoresistance
Eliminate the light source
Check the correct positioning and oper-
Heating sensor damaged
ation of the heating sensor
No water circulation in the system
Check the circulating pump
Air in the system
Vent the system
Check the card parameter and modify it
Wrong card parameter setting
if necessary
Preheater fault
Check the preheater
Wiring disconnected
Check the wiring
Check the card parameter and modify it
Wrong card parameter setting
if necessary
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