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2. OPERATING INSTRUCTIONS
2.1 Introduction
Dear Customer,
Thank you for choosing a FERROLI boiler featuring advanced design, cutting-edge tech-
nology, high reliability and quality construction. Please read this manual carefully since
it provides important information on safe installation, use and maintenance.
ATLAS D ECO SI UNIT is a high-efficiency heat generator for heating and domestic hot
water production, equipped with a blown oil burner. The boiler shell consists of cast-iron
elements, assembled with double cones and steel stays. The control system is with mi-
croprocessor and digital interface with advanced temperature control functions.
2.2 Control panel
Panel
11
12
1
14
2
19
13
27
26
24
3
25
23
4
22
fig. 1 - Control panel
Panel key
1 =
DHW temperature setting decrease button
2 =
DHW temperature setting increase button
3 =
Heating system temperature setting decrease button
4 =
Heating system temperature setting increase button
5 =
Display
6 =
Summer / Winter mode selection button
7 =
Economy / Comfort mode selection button
8 =
Reset button
9 =
Unit On / Off button
10 =
"Sliding Temperature" menu button
11 =
Set DHW temperature reached
12 =
DHW symbol
13 =
DHW mode
14 =
DHW outlet temperature / setting
15 =
Eco (Economy) or Comfort mode
16 =
External sensor temperature (with optional external probe)
17 =
Appears on connecting the external Probe or the Remote Timer Control (op-
tionals)
18 =
Room temperature (with optional Remote Timer Control)
19 =
Burner On
20 =
Antifreeze operation
21 =
Heating system pressure
22 =
Fault
23 =
Heating delivery temperature/setting
24 =
Heating symbol
25 =
Heating mode
26 =
Set heating delivery temperature reached
27 =
Summer mode
Indication during operation
Heating
A heating demand (generated by the Room Thermostat or Remote Timer Control) is in-
dicated by flashing of the hot air above the radiator (details 24 and 25 - fig. 1).
The heating graduation marks (detail 26 - fig. 1) light up as the heating sensor tempera-
ture reaches the set value.
36
EN
15
5
16
7
21
20
18
17
6
fig. 2
cod. 3541Q544 - Rev. 02 - 05/2024
Domestic hot water (DHW)
A DHW demand (generated by drawing domestic hot water) is indicated by flashing of
the hot water under the tap (details 12 and 13 - fig. 1).
Comfort
9
10
A Comfort demand (reinstatement of temperature inside the boiler) is indicated by flash-
ing of the COMFORT symbol (details 15 and 13 - fig. 1)
2.3 Lighting and turning off
Boiler not electrically powered
8
The antifreeze system does not work when the power
B
and/or gas to the unit are turned off. To avoid damage
caused by freezing during long idle periods in winter, it is
advisable to drain all water from the boiler, DHW circuit
and system; or drain just the DHW circuit and add a suit-
able antifreeze to the heating system, complying with that
prescribed in sec. 3.3.
Boiler lighting
•
Open the fuel on-off valves.
•
Switch on the power to the unit.
•
For the next 120 seconds "FH" will be displayed in the upper part of the display,
which identifies the heating system air venting cycle.
•
During the first 5 seconds the software version of the card will also be shown in the
lower part of the display.
•
When the message FH disappears, the boiler is ready to operate automatically
whenever domestic hot water is drawn or in case of a room thermostat demand.
Turning the boiler off
Press the on/off button (detail 9 - fig. 1) for 1 second.
ATLAS D ECO SI UNIT
fig. 3
fig. 4
fig. 5 - Boiler not electrically powered
fig. 6 - Boiler lighting
fig. 7 - Turning the boiler off
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