Ariston microCombi 23 MFFI Installation And Servicing Instructions page 57

F G
K
I
UT002A
G
F
UT003A
B
UT004A
C
UT005A
G
F
UT003A
K
UT002A
- If the water is very hard, it is recommended that a water softener or in-line scale reducer
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 "F" and "G" 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 a local Service Agent.
Press button "A". The green L.E.D. "K" will illuminate indicating that the boiler is ready
to operate. The centralised electronic control unit will ignite the burner, upon demand for
either C.H. or D.H.W. If, after approximately 10 seconds, the burner has not ignited, the
boiler safety devices will shut off the gas and the red L.E.D. "I" illuminates. To reset the
ignition system, the reset "J" 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 a local Service Agent. I
each time.
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.
Press "F" button to select winter mode. The green L.E.D. "G" will illuminate.
It is possible to set the temperature of the heating system by adjusting the knob "B".
By positioning the indicator somewhere between 1 and 9, a temperature may be obtained
which varies from approximately 42˚C to about 82˚C.
E
XTERNAL
If an external (room) thermostat is installed, it is recommended that the temperature of
the heating system be set by means of the "B" knob, leaving it at 7-8 position 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 "C" knob. A delivery temperature for the water may be chosen in a
range from 36˚C to about 54˚C, depending on the flow rate of the water and the position
of the knob between 1 and 9 settings. N
enough, it may be necessary to slow the flow rate from the hot water outlet being
used.
T
URNING OFF THE CENTRAL HEATING
To turn off the Central Heating, press the "F" button; the respective green L.E.D. "G" will go off.
The boiler will stay in summer mode, only providing Domestic Hot Water
To turn the boiler off, press the button "A"; the respective green L.E.D. "K" will go off. Close the
gas cock located under the boiler by inserting a screw driver into the bottom slot (See F & G)
and turning 1 / turn clockwise until it stops (slot horizontal). It is also necessary to turn the
4
electricity supply switch (located outside the boiler) to the OFF position.
P
RACTICAL TIPS
I
GNITION PROCEDURE
!! Always wait 2 minutes before resetting
MPORTANT
A
DJUSTING THE HEATING
( )
ROOM THERMOSTAT CONTROL
: Should the Domestic Hot Water not be hot
OTE
T
URNING OFF THE BOILER
5