Connection To The Flue; Service And Maintenance; Electrical Connections - Ferroli ATLAS 25 SI UNIT Instrucciones De Uso, Instalación Y Mantenimiento

ATLAS 25 SI UNIT
fig. 20 - Siphon feed
fig. 21 - Ring feed

3.5 Electrical connections

Connection to the electrical grid
The unit's electrical safety is only guaranteed when correctly connected to an efficient
earthing system executed according to current safety standards. Have the efficiency and
suitability of the earthing system checked by professionally qualified personnel. The
manufacturer is not responsible for any damage caused by failure to earth the system.
Also make sure that the electrical system is adequate for the maximum power absorbed
by the unit, as specified on the boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the electricity line.
The connections to the grid must be made with a permanent connection and equipped with a bi-
polar switch whose contacts have a minimum opening of at least 3 mm, interposing fuses of max.
3A between the boiler and the line. It is important to respect the polarities (LINE: brown wire / NEU-
TRAL: blue wire / EARTH: yellow-green wire) in making connections to the electrical line. During
installation or when changing the power cable, the earth wire must be left 2 cm longer than the
others.
The user must never change the unit's power cable. If the cable gets damaged, switch
off the unit and have it changed solely by professionally qualified personnel. If changing
the electric power cable, use solely "HAR H05 VV-F" 3x0.75 mm2 cable with a maxi-
mum outside diameter of 8 mm.
Room thermostat (optional)
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE CON-
TACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMINALS WILL
PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for these devices
from their breaking contacts Their power supply must be by means of direct connection
from the mains or with batteries, depending on the kind of device.
Accessing the electrical terminal block
Undo the two screws "A" located on the top part of the control panel and remove the cover.
fig. 22 - Accessing the terminal board
A
A
cod. 3541I320 - Rev. 01 - 10/2016

3.6 Connection to the flue

The unit must be connected to a flue designed and built in compliance with current reg-
ulations. The pipe between the boiler and flue must be made from material suitable for
the purpose, i.e. heat and corrosion resistant. Ensure the seal at the joints and insulate
the entire pipe between boiler and flue, to prevent the formation of condensate.

4. SERVICE AND MAINTENANCE

All adjustment, conversion, commissioning and maintenance operations described be-
low must only be carried out by Qualified Personnel (meeting the professional technical
requirements of current regulations) such as the personnel of the Local After-Sales
Technical Service.
FERROLI declines any liability for damage and/or injury caused by unqualified and un-
authorised persons tampering with the unit.
4.1 Adjustments
TEST mode activation
Press the Reset button (detail 3 - fig. 1) 3 times in 3 seconds to activate the TEST mode.
The boiler lights irrespective of the heating or hot water demand.
The heating symbol (detail 5 - fig. 1) and DHW symbol (detail 6 - fig. 1) flash on the dis-
play.
fig. 23 - TEST Mode
To deactivate TEST mode, repeat the activation sequence.
The TEST mode is automatically disabled in any case after 15 minutes.
Burner adjustment
The burner is factory-set as given in table 2. The burner can be set to a different power
by adjusting the pump pressure, nozzle, head and air setting as described in the follow-
ing paragraphs. In any case, the new power setting must come within the boiler's nominal
working range. After making any adjustments, use a combustion analyser to check that
the CO % in the fumes is between 11% and 12%.
2
Table. 2 - Burner adjustment
Heating Burner Burner
capacity model capacity
US
kW kg/h
Gall/h
28.3 SUN G6 2.24 0.60
Oil nozzle delivery table
table 3 indicates the oil deliveries (in kg/h) as the pump and nozzle pressure changes.
N.B. - The values given in the table are approximate, since the nozzle deliveries can vary
by ± 5%. Also, for burners with a preheater, the fuel flow rate decreases by approximately
10%.
Table. 3
Pump pressure kg/cm
NOZZLE
8 9
G.P.H.
0.40 1.36 1.44
0.50 1.70 1.80
0.60 2.04 2.16
0.65 2.21 2.34
0.75 2.55 2.70
0.85 2.89 3.06
1.00 3.40 3.61
Delivery at nozzle outlet in kg/h
40
20
0
x3
Pump Head
Nozzle
pressure adjustment
Angle Code Bar L
60° 35601540 9 19
2
10 11 12 13
1.52 1.59 1.67 1.73
1.90 1.99 2.08 2.17
2.28 2.39 2.50 2.60
2.47 2.59 2.71 2.82
2.85 2.99 3.12 3.25
3.23 3.39 3.54 3.68
3.80
EN
60
80
100
120
Air
adjustment
Mark
8
14
1.80
2.25
2.70
2.92
3.37
3.82