SILVER 24T - 34T
19
EN
cod. 3541I691 - Rev. 00 - 01/2017
Turning the boiler off and on
Press the
On/Off button
(detail 7 fig. 1) again for 5 seconds.
fig. 7 - Turning the boiler off
When the boiler is turned off, the PCB is still powered. Domestic hot water and heating
are disabled. The frost protection system remains activated. To relight the boiler, press
the
On/Off button
(detail 7 fig. 1) again for 5 seconds.
fig. 8
The boiler will be immediately ready to operate whenever domestic hot water is drawn
or in case of a room thermostat demand.
B
The frost protection system does not work when the power and/or gas to the
unit are turned off. To avoid damage caused by freezing during long shutdowns
in winter, it is advisable to drain all water from the boiler, the DHW circuit and
the heating system water; or drain just the DHW circuit and add a suitable an-
tifreeze to the heating system, as prescribed in sec. 3.3.
2.4 Adjustments
Summer/Winter Switchover
Press the
summer/winter
button (detail 6 - fig. 1) for 2 seconds.
The display activates the Summer symbol (detail 10 - fig. 1): the boiler will only deliver
domestic hot water. The antifreeze system remains activated.
To deactivate the Summer mode, press the
summer/winter
button (detail 6 - fig. 1)
again for 2 seconds.
Heating temperature adjustment
Use the heating buttons (details 3 and 4 - fig. 1) to adjust the temperature from a min. of
20°C to a max. of 80°C.
fig. 9
DHW temperature adjustment
Use the DHW buttons (details 1 and 2 - fig. 1) to adjust the temperature from a min. of
10°C to a max. of 65°C.
fig. 10
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature required in the rooms. If the room ther-
mostat is not installed, the boiler will keep the system at the set system delivery setpoint
temperature.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the required temperature in the rooms. The boiler will
adjust the system water according to the required room temperature. For operation with
remote timer control, please refer to the relevant instruction manual.
Hot water tank exclusion (economy)
Hot water tank temperature maintaining/heating can be excluded by the user. If exclud-
ed, domestic hot water will not be delivered.
The hot water tank can be deactivated by the user (ECO mode) by pressing the ECO/
COMFORT button (detail 7 - fig. 1). In ECO mode the display activates the ECO symbol
(detail 12 - fig. 1). To activate COMFORT mode, press the ECO/COMFORT button (de-
tail 7 - fig. 1) again.
Sliding Temperature
When the optional external probe is installed the boiler adjustment system works with
"Sliding Temperature". In this mode, the heating system temperature is regulated ac-
cording to weather conditions, to ensure the high comfort and energy efficiency through-
out the year. In particular, as the outside temperature increases the system delivery
temperature decreases according to a specific "compensation curve".
With the Sliding Temperature adjustment, the temperature set with the heating buttons
(detail 3 - fig. 1) becomes the maximum system delivery temperature. It is advisable 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. However,
the user can make any further adjustments necessary to optimise comfort levels.
Compensation curve and curve offset
Press the
reset button
(detail 6 - fig. 1) for 5 seconds to access the “Sliding temperature”
menu; the display shows “CU” flashing.
Use the DHW buttons (detail 1 - fig. 1) to adjust the desired curve from 1 to 10 according
to the characteristic (fig. 11). By setting the curve to 0, the sliding temperature adjust-
ment is disabled.
Press the heating buttons (detail 3 - fig. 1) to access parallel curve offset; the display
shows “OF” flashing. Use the DHW buttons (detail 1 - fig. 1) to adjust parallel curve offset
according to the characteristic (fig. 12).
Press the
reset button
(detail 6 - fig. 1) again for 5 seconds to exit the "Sliding Temper-
ature" menu.
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.
fig. 11 - Compensation curves
fig. 12 - Example of compensation parallel curve offset
Adjustments from Remote Timer Control
A
If the Remote Timer Control (optional) is connected to the boiler, the above ad-
justments are managed according to that given in table 1.
Table. 1
0
1
4
2
3
reset
eco
comfort
0
1
4
2
3
reset
eco
comfort
Heating temperature setting
Adjustment can be made from the Remote Timer Control menu
and the boiler control panel.
DHW temperature adjustment
Adjustment can be made from the Remote Timer Control menu
and the boiler control panel.
Summer/Winter Switchover
Summer mode has priority over a possible Remote Timer Control
heating demand.
Eco/Comfort selection
On disabling DHW from the Remote Timer Control menu, the
boiler selects the Economy mode. In this condition, the
eco/com-
fort
button (detail 7 - fig. 1) on the boiler panel is disabled.
On enabling DHW from the Remote Timer Control menu, the
boiler selects the Comfort mode. In this condition it is possible
select one of the two modes with the
eco/comfort
button (detail 7
- fig. 1) on the boiler panel.
Sliding Temperature
Both the Remote Timer Control and the boiler card manage Slid-
ing Temperature adjustment: the boiler card Sliding Temperature
has priority.
20
30
40
50
60
70
80
90
85
20
10
0
-10
-20
1
2
3
4
5
6
8
9
10
7
20
30
40
50
60
70
80
90
85
20
30
40
50
60
70
80
90
85
1
2
3
4
5
6
8
9
10
7
1
2
3
4
5
6
8
9
10
7
OFFSET = 20
OFFSET = 40
