Ariston microGENIUS HE 24 MFFI User Manual page 5

PL004D
PL007D
summer
PL009D
winter
PL009D
C
PL008D
C
PL008D
B
- If the water is very hard, it is recommended that a water softener be added to the
system so as to reduce the formation of limescale in the boiler exchangers. This will
ensure that the efficiency of the unit remains the same over time, reducing gas
consumption and maintenance costs.
- If the boiler should be out of use for a prolonged period, it is recommended that the
electrical power supply be disconnected and that the external gas cock be closed. If low
temperatures are expected, the boiler and system pipe work should be drained in order
to prevent frost damage.
- To improve comfort and take full advantage of the heat produced by the boiler, it is
recommended that an external (room) thermostat be installed.
- It is good practice to clean and service the appliance and central heating system every
year. Call an Authorised Service Centre.
Turn the selector knob "A" to the "I" position. The display will
indicate "o o n n " indicating that the boiler is ready to operate. The
electronic control unit will ignite the burner, without any manual
intervention but in response to the request for Domestic Hot Water
or heating. If, after approximately 10 seconds, the burner has not
ignited, the boiler safety devices will shut off the gas and the
display will indicate the fault code A A 0 0 1 1 . To reset the ignition
system, the reset button "D" must be pressed and released. Should
the boiler fail to ignite a second time, check that the external gas cock
is open. If the problem persists, contact an Authorised Service Centre.
W
INTER AND SUMMER OPERATING MODES
In the 'winter' operating mode, the boiler will produce both Central
Heating and Domestic Hot Water. In the 'summer' operating mode,
the boiler will produce only Domestic Hot Water.
Using the knobs on the control panel, the user can select 'winter'
or 'summer' operating mode.
Keeping the knob "C" at the "
operating mode, the simbol "
mode may be selected by positioning the knob "C" between the
min. and max. settings. The simbol "
It is possible to set the temperature of the Central Heating system by adjusting the knob
"C". By positioning the indicator somewhere between min. and max., a temperature may
be obtained which varies from approximately 45˚C to about 80˚C.
The water temperature in the primary circuit may be checked on the display.
E
XTERNAL
If an external (room) thermostat is installed, it is recommended that the temperature of
the Central Heating system be set by means of the "C" knob, leaving it at max in order
to obtain the best performance from the boiler and to allow the regulation of the external
temperature to function efficiently.
S
ETTING THE HOT WATER FOR DOMESTIC USE
Both in the winter and summer mode, the temperature of the Domestic Hot Water may be
adjusted by using the "B" knob. A delivery temperature for the water may be chosen in a
range from 36˚C to about 56˚C, depending on the flow rate of the water and the position
of the knob between the min. and max. settings.
The water temperature in the primary circuit may be checked on the display.
P
RACTICAL TIPS
I
GNITION PROCEDURE
I I
" position selects the 'summer'
" will illuminate. 'Winter' operating
" will illuminate.
A
DJUSTING THE HEATING
( )
ROOM THERMOSTAT CONTROL
A
I I
PL004D E C
D
PL006C
estate
C
inverno
C
PL007C
5