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Press the button
(detail 7 - fig. 1) for 5 seconds.
When the boiler is turned off, the PCB is still powered.
Domestic hot water (with optional hot water tank installed) and heating operation are dis-
abled. The antifreeze system remains activated.
To relight the boiler, press the button
The boiler will be immediately ready to operate whenever domestic hot water is drawn
(with optional hot water tank installed) or in case of a room thermostat demand.
To completely disconnect the power to the unit, press the button detail 14 fig. 1.
B
The antifreeze system does not work when the power and/or gas to the unit are
turned off. To avoid damage caused by freezing during long idle periods in win-
ter, it is advisable to drain all water from the boiler, DHW circuit and system; or
drain just the DHW circuit and add a suitable antifreeze to the heating system,
complying with that prescribed in sec. 3.3.
Press the button
detail 6 - fig. 1 for 1 second.
The display activates the Summer symbol detail 10 - fig. 1. The heating function is deac-
tivated, whereas the possible production of domestic hot water (with optional external hot
water tank) remains activated. The antifreeze system remains activated.
To deactivate Summer mode, press the button
ond.
Use the heating buttons
ture from a min. of 20°C to a max. of 90°C.
Use the
(details 1 and 2 - fig. 1) to adjust the temperature from a min. of
10°C to a max. of 65°C.
eco
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comfort
(detail 7 fig. 1) again for 5 seconds.
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comfort
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(detail 6 - fig. 1) again for 1 sec-
(details 3 and 4 - fig. 1) to adjust the tempera-
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comfort
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comfort
cod. 3540S736 - Rev. 00 - 09/2013
Using the room thermostat, set the temperature required in the rooms.
Using the remote timer control, set the temperature desired in the rooms. The boiler unit
will set the system water according to the required room temperature. For information on
the remote timer control, please refer to its user's manual.
When the optional external probe is installed the corresponding symbol (detail 22 fig. 1)
is activated on the control panel display (detail 5 - fig. 1). The boiler control system works
with "Sliding Temperature". In this mode, the heating system temperature is controlled
according to the outside weather conditions in order to ensure high comfort and energy
saving throughout the year. In particular, as the outside temperature increases, the sys-
tem delivery temperature is decreased according to a specific "compensation curve".
With Sliding Temperature adjustment, the temperature set with the heating buttons
3 and 4 - fig. 1) becomes the maximum system delivery temperature. It is advis-
able to set a maximum value to allow system adjustment throughout its useful operating
range.
The boiler must be adjusted at the time of installation by qualified personnel. Adjust-
ments can in any case be made by the user to improve comfort .
Compensation curve and curve offset
Press the
button (detail 8 - fig. 1) for 5 seconds, to display the actual compensation
curve (fig. 10) which can be modified with the
Adjust the required curve from 1 to 10 according to the characteristic (fig. 12).
By setting the curve to 0, sliding temperature adjustment is disabled.
Press the
(details 3 and 4 - fig. 1) to access parallel curve offset
(fig. 13), modifiable with the
Press the
button (detail 8 - fig. 1) again for 5 seconds to exit parallel curve adjust-
ment mode.
If the room temperature is lower than the required value, it is advisable to set a higher
order curve and vice versa. Proceed by increasing or decreasing in steps of one and
check the result in the room.
90
85
80
70
60
50
40
30
20
20
10
OFFSET = 20
90
10
9
8
7
85
6
80
5
70
4
60
3
50
2
40
1
30
20
(details 1 and 2 - fig. 1).
I
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(details 1 and 2 - fig. 1).
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10
9
8
7
6
5
4
3
2
1
0
-10
-20
OFFSET = 40
90
10
9
8
7
85
80
70
60
50
40
30
20
6
5
4
3
2
1
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