Ferroli ATLAS D 25 K 100 UNIT Instrucciones De Uso, Instalación Y Mantenimiento página 45

ATLAS D 25 K 100 UNIT
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
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
A
R
SB
W
M
t1
Z
t3
BV
FR
fig. 35 - Unit cycle
R-SB-W Thermostats/Pressure switches
M Burner motor
Z Ignition transformer
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 proper operation of the unit, have it checked yearly by qualified personnel,
providing for the following:
• The control and safety devices must function correctly.
• The fume exhaust circuit must be perfectly efficient.
• Make sure there are no obstructions or dents in the fuel supply and return pipes.
• Clean the fuel intake line filter.
• Check correct fuel consumption
• Clean the combustion head in the fuel outlet zone, on the turbulence disc.
• Leave the burner operating at max. for about ten minutes, then analyse the combus-
tion, checking:
- Correct setting of all the elements specified in this manual
- Fume temperatures at the flue
- CO2 percentage content
• The ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. For cleaning, do not
use chemical products.
• The fuel and water systems must be tight.
• The water pressure in the system when cold 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.
B C
t3n
TSA
cod. 3541I100 - Rev. 03 - 04/2018
The boiler casing, control panel and aesthetic parts can be cleaned with a soft
and damp cloth, if necessary soaked in soapy water. Do not use any abrasive
detergents and solvents.
Burner disassembly
• Remove the casing (B) by undoing the screw (A), thus making all the accessories
accessible.
• Undo the nut (C) and position the burner in order to access the nozzle.
C
D
Boiler cleaning
1. Disconnect the power supply to the boiler.
2. Remove the burner (see preceding section).
3. Remove the upper panel.
4. Remove the cleaning door "A" by undoing the nuts "B".
5. Open the burner door "C" after undoing the nuts "D".
6. Clean the inside of the boiler and the entire path of exhaust fumes, using a tube
brush, exhauster or compressed air.
7. Then close the doors.
fig. 36 - Burner disassembly
C
A
D
fig. 37
EN
A
B
B