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ATLAS D ECO 56 UNIT
Air damper adjustment
After loosening the screw 3, operating the screw 1, the combustion air is adjusted ac-
cording to the indications of the pointer 2. After adjustment, lock the screw 3.
Position of electrodes - baffle
After fitting the nozzle, check correct positioning of the electrodes and baffle, according
to the dimensions given below. It is advisable to check the dimensions after each oper-
ation on the head.
2÷3
2÷3
fig. 28- Position of electrodes - baffle
4.2 Commissioning
Checks to be done at first lighting, and after all mainte-
B
nance operations that involved disconnection from the
systems or work on safety devices or parts of the boiler:
Before lighting the boiler
•
Open any on-off valves between the boiler and the systems.
•
Check the tightness of the fuel system.
•
Check the pre-filling of the expansion tank
•
Fill the water system and make sure that all air contained in the boiler and the sys-
tem has been vented by opening the air vent valve on the boiler and any vent valves
on the system.
•
Make sure there are no water leaks in the system, hot water circuits, connections or
boiler.
•
Make sure the electrical system is properly connected and the earth system works
properly.
•
Make sure there are no flammable liquids or materials in the immediate vicinity of
the boiler.
•
Fit the pressure gauge and the vacuum gauge on the pump (remove after starting)
of the burner.
•
open the gate valves along the diesel pipe
Lighting
P
P
fig. 29 - Starting
A
When the thermostatic line closes, the burner motor starts turning together with the
pump: all the oil sucked is sent to the return. The burner blower and the ignition trans-
former are also working, therefore the following stages are carried out:
•
firebox preventilation.
•
prewash of a part of the oil circuit.
2
3
MAX
4
AIR
2
ARIA
M
STOP
AIR
A
4
1
MIN
X
AIR
2
LUFT
STOP
AIRE
1
M
N
I
fig. 27
3
VE
G
VE
G
cod. 3541Q964 - Rev. 01 - 11/2022
•
preignition, with discharge between electrode tips.
B
At the end of prewash, the unit opens the electromagnetic valve: the oil reaches the noz-
zle, where it is finely sprayed.
1
Its contact with the discharge between the electrode tips creates the flame.
The safety time begins simultaneously.
Unit cycle
ARIA
AIR
LUFT
AIRE
R-SB-W Thermostats/Pressure switches
M
Burner motor
Z
Ignition transformer
6÷6,5
BV
Electromagnetic valve
FR
Photoresistance
A'
Beginning of ignition with pre-heater
A
Beginning of ignition 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
Preheating 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.
t3n
t1
t3
TSA
fig. 30 - Unit cycle
EN
33
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