– press the button
y
mode
l
has been selected
– press and hold down the buttons
for approximately 10 seconds until the message "Hi" appears
on the display together with the flashing symbols
– press the button
>
to make the boiler operate at maximum
power "Hi" and check that the mains gas pressure value on the
pressure gauge is correct. Take a reading of the combustion
data and measure the combustion efficiency.
– press the button
<
to make the boiler operate at minimum
power "Lo". The message "Lo" will appear on the display
together with the flashing symbols
– take the combustion data reading
– press the button
y
Procedure". The boiler water delivery temperature will
appear on the display
– disconnect the pressure gauge, carefully close the pressure
point (6), put the control panel back to the original position
and refit the front panel (2).
Gas supply pressure
Type of gas
Pressure (mbar)
124
for at least 1 second until "SUMMER"
<
and
>
at the same time
l
l
and
n
to exit the "Chimney sweeper
G20
G31
20
37
3.7
Domestic hot water comfort function
(preheating)
models have a "domestic hot water comfort" function
HE Plus
which ensures the best performance in terms of domestic hot
and
n
water, reducing the time necessary for the hot water to become
available and ensuring that the temperature is stable.
To activate the function:
– select parameter "PAR 22" (see "Parameter setting and
display") and set it to a 1
– exit parameter settings and press button
5 seconds until the symbol
begins to flash indicating that the function has been activated.
To deactivate the function:
– press button
symbols
r
and
indicating that the function has been deactivated.
3.8
Gas conversion
models can work with G20 or G31 without the need for
HE Plus
any mechanical conversion. Simply select parameter "PAR 03"
(see "Parameter setting and display") and set the type of gas
to be used.
If changing the type of gas to be used, carry out the entire
appliance "COMMISSIONING" phase.
m
CAUTION
Conversion may ONLY be carried out by Professionally
Qualified Personnel.
m
CAUTION
If the gas supply is changed from G20 to G31, mark the
box on the TECHNICAL DATA PLATE.
G31 - 37 mbar
>
r
appears on the display and
>
again for approximately 5 seconds until the
R
appear on the display and begin to flash
EN
for approximately
X