31
1 Commissioning
1.1
Preliminary checks
Commissioning of the format slim He 25 t boiler must be car-
ried out by professionally qualified Personnel after which the
boiler can operate automatically. It may however be necessary
for the User to start the appliance autonomously without in-
volving a technician: for example, after a holiday.
First of all check that the gas isolation and water system
valves are open.
1.2
ignition
After having carried out the preliminary checks, perform the
following to start the boiler:
– set the main system switch to "ON" in order for the display
to show the pressure level in the system during refilling
– make sure that the operating mode is set to "stand-by; if this is
not the case, press the button
y
until "Stand-by" mode
has been selected
ON
Fig. 1
– on the display (1), check that the heating system pressure
when cold is 1-1.2 bar. If this is not the case, open the filling
valve (2) and restore the heating system pressure until the
display (1) shows a reading of 1-1.2 bar
– close the filling valve (2)
2
1
Fig. 2
– select the "SUMMER"
l
operating mode by pressing and
holding the
y
button for at least 1 second. the value of the
delivery sensor detected at that moment will appear on the
display
– open one or more than one hot water tap. The boiler will
work at maximum power until the taps are closed.
Once the boiler has been commissioned in "SUMMER
mode"
l
"WINTER mode"
n
can be selected by pressing
and holding the button
y
for at least 1 second. The value of
the delivery water temperature detected at that moment will
appear on the display. In this case it is necessary to adjust the
air thermostat/s to the required temperature or if the system
has a chrono-thermostat, check that this is "active" and ad-
justed.
1.3
adjusting the heating temperature
If the heating temperature is to be increased or decreased,
press the button
t
followed by the buttons
>
or
<
until the
desired temperature is reached. The temperature can be set
to between 20 and 80°C.
1.4
adjusting the domestic hot water
temperature
If the domestic hot water temperature is to be increased or
decreased, press the button
r
followed by the buttons
>
or
<
until the desired temperature is reached. The temperature
can be set to between 10 and 60°C.
