Ferroli ATLAS D ECO 34 COND UNIT Instrucciones De Uso, Instalación Y Mantenimiento página 40

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. 32- Position of electrodes - baffle
4.2 Commissioning
B
Checks to be made at first lighting, and after all maintenance operations involv-
ing disconnection from the systems or an operation 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
40
EN
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. 31
3
cod. 3541Q460 - Rev. 00 - 10/2015
ATLAS D ECO COND UNIT
Start-up
1
ARIA
AIR
LUFT
AIRE
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.
• preignition, with discharge between electrode tips.
B
6÷6,5
At the end of prewash, the unit opens the electromagnetic valve: the oil reaches the noz-
zle, where it is finely sprayed.
Its contact with the discharge between the electrode tips creates the flame.
The safety time begins simultaneously.
Unit cycle
R-SB-W Thermostats/Pressure switches
OIl pre-heater
OH
Operation enabling contact
OW
Burner motor
M
Ignition transformer
Z
Electromagnetic valve
BV
Photoresistance
FR
Starting with pre-heater
A'
Starting without pre-heater
A
Flame present
B
Normal operation
C
Adjustment stop (TA-TC)
D
Pre-ventilation time
t1
Safety time
TSA
Pre-ignition time
t3
Post-ignition time
t3n
Pre-heating time
tw
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
in the fumes is between 11% and 12%.
CO
2
• Check the parameters are programmed correctly and perform any required custom-
ization (compensation curve, power, temperatures, etc.).
VE
P
VE
P
fig. 33 - Starting
t3n
tw t1
t3 TSA
fig. 34 - Unit cycle
G
G