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ENGLISH
Confirming with the MENU (B) key returns you to the display of the
on/standby status.
B
Fig. 5
If no action is taken, once 2 minutes have passed the appliance exits the
menu and returns to the normal operation screen.
4.4 Start-up
The first commissioning of the appliance must be carried out by qualified
personnel.
The following checks and operations must be carried out:
- check that the fuel shut-off and water taps of the water system are open
Fig. 6
- set the system's master switch to "on".
Fig. 7
The appliance is powered and is normally off.
The display shows in sequence (from off to on) every 2 seconds a seg-
ment of 2 digits to compose the writing "oF" (off). When "oF" is fully pres-
ent on the display, it remains on for 10 seconds, then it blinks 5 times and
switches off for 5 seconds. After which the sequence for switching on
the segments restarts.
In this way the appliance ignores every ignition
request.
Fig. 8
- Press the ON - OFF/RESET (A) button to switch on the appliance.
All the icons on the display appear for 2 seconds. After which only the
icons regarding the current operating mode stay on.
In ON mode, the appliance is on with the possibility of producing domestic
hot water.
If there is no domestic hot water request, the water heater goes into
stand-by.
During this phase the display switches on in sequence (from off to on)
every 2 seconds a segment to compose the writing "Sb".
When "Sb" is visible on the display, it remains on for 10 seconds, then
it blinks 5 times and switches off for 5 seconds. Then the activation se-
quence of the segments restarts.
In stand-by, if the temperature measured by the domestic hot water probe
is > 65°C the fan is started. When the temperature drops below 65°C the
fan remains powered for another minute and then is switched off.
Fig. 9
Domestic hot water pick-up
- Open a domestic hot water tap. Once the time set in the parameter
“Domestic Hot Water Waiting Time” has passed (about 0.5 seconds)
the display shows the tap symbol and the set temperature.
- The burner comes one, when the flame is detected, the corresponding
symbol is shown on the display.
- The appliance will produce domestic hot water at the temperature set
in the parameter "Domestic hot water maximum setpoint” (see table of
parameters).
- When the water tap is shut-off, the boiler switches off and prepares for
the next start-up.
The switching on and off of the burner is managed in two modes:
- absolute: burner switching off threshold at 70°C
- correlated: burner switching off threshold when the setpoint of +4°C is
reached.
The switching back on point is the same for both modes and is the set-
point -1°C.
Fig. 10
CHANGING THE DOMESTIC HOT WATER SETPOINT
- Pressing the "+" or "-" key it is possible to change the setpoint for the
domestic hot water. With the "+" key the value increases, with the "-"
key it decreases.
Fig. 11
If there is a fault the water heater carries out a “STOP” (see section Op-
erating faults and reset).
