5.9
Circulation pump
The flow-head performance curve available for the heating
system is shown in the graph below.
RESIDUAL HEAD (mbar)
500
400
300
200
100
0
0
200
400
5.10
Control panel
3
4
3
OFF
RESET
5
MULTIFUNCTIONAL HEATING DIAL
1
During normal operation, the heating dial allows:
t
"WINTER mode" (Central Heating and Domestic Hot
Water) to be selected and its setpoint to be set.
l
"SUMMER mode" (Domestic Hot Water only) to be
selected.
6
boiler off with all heat requests excluded. However the
following functions are still on: anti-freeze, pump anti-
seize and 3-way valve.
R
unlock the system after a permanent lockout stoppage.
To reset the system, turn the dial to " OFF/Reset "; wait
until the " RES " message appears on the display, then
turn the dial back to the previous position.
56
600
800
1000
1200
1400
FLOW (l/h)
Fig. 19
1
2
6
Fig. 20
MULTIFUNCTIONAL DHW DIAL
2
During normal operation, the DHW dial allows:
D
the DHW setpoint to be set.
z
the "chimney sweep function" to be set.
SERVICE BUTTONS
3
> <
Buttons
>
and
<
(service buttons) are reserved for
Professionally Qualified Personnel who, with the correct
procedures, described in the relevant sections, can carry
out procedures to configure, adjust and calibrate the
boiler-system structure.
4
SERVICE CONNECTOR
Programming connector cover plug.
m
CAUTION
Buttons
>
,
<
and the connector are NOT accessible to the
user but only to Trained Technical Personnel
DISPLAY
5
n
. The symbol is shown in Antifreeze
"ANTIFREEZE"
operating mode. When the boiler is switched on, the
symbol
8
or
t
will also appear, depending on the type
of antifreeze in progress (relating to DHW or central
heating).
8
"DOMESTIC HOT WATER"
request for DHW; it flashes while the domestic hot water
set point is being selected.
t
. This symbol stays steadily on
"CENTRAL HEATING"
during central heating operation; it flashes while the
central heating set point is being selected.
1
. This symbol stays steadily on during
"FLAME PRESENT"
burner operation, when the system detects a flame is
present.
2
"LOCKOUT" BECAUSE NO FLAME PRESENT
stays steadily on when the system does NOT detect a
flame.
I
. This indicates that a fault has occurred. The
"ALARM"
presence of another symbol specifies the cause that
triggered it (see paragraph "Malfunction codes and
possible solutions".)
7
.
The
"TEMPERATURE"
expressed in degrees Celsius.
3
"EXTERNAL SENSOR"
. This symbol is shown when
the control board recognises an external sensor is
connected. To modify the curve of the external sensor,
turn the multifunctional heating dial
k
"WATER PRESSURE"
. This symbol is shown together with
the
I
symbol and indicates there is no water pressure
in the central heating circuit.
c
. This symbol is shown together with
"CHIMNEY SWEEP"
the
I
symbol and indicates that the Chimney sweep
function should be activated.
0
. This symbol flashes when
"OVERTEMPERATURE"
the system temperature reaches an excessive, and
potentially dangerous, level.
PRESSURE GAUGE
6
EN
.
. This symbol is shown during a
. This symbol
temperature
is
displayed,
t
.