Ariston Clas 24 FF Installation And Servicing Instructions page 72

user' manual
Initial operating procedures
If the boiler is installed inside the apartment, make sure that
all provisions relating to the air inlet and room ventilation (in
compliance with current legislation) are respected.
Check the water pressure on the display regularly and make sure
that the fi gure is between 0.6 and1.5 bar when the system is cold.
If the pressure is just under the minimum value the display will
request a fi lling procedure.
Re-establish the correct pressure by fi lling loop.
If the pressure drops very frequently, there may be a water leak at
some point in the system. If this is the case a plumber should be
contacted.
Ignition procedure
Press the ON/OFF button on the control panel to switch on the boiler.
The display shows:
The fi rst fi gure indicates the operating mode:
0 - Stand -by,
C - Central heating request
c - Heating post-circulation
d - Domestic hot water request
H - Hot water post-circulation
F - Circulation pump anti-freeze protection enabled
- burner anti-freeze protection enabled
The second and third fi gures indicate:
- the fl ow temperature when no heating requests have been made
- the fl ow temperature in central heating mode
- the temperature of the hot water in domestic hot water mode
- the fl ow temperature in anti-freeze mode.
4
Winter or summer function
Turn the heating button 6 to select the desired operating mode
(winter or summer). In winter mode every heating is shown on the
display by the heating temperature.
Summer mode is set by putting the button 6 in "O" position (hea-
ting off ).
Adjusting the heating
It is possible to set the temperature of the heating water by
adjusting the knob 6. By placing the indicator somewhere between
min. and max. a temperature may be obtained which varies from
about 20°C to about 45°C (low temperature) and about 35°C to
about 82°C (high temperature).
Domestic hot water temperature adjustement (COMBI)
It is possible to set the temperature of the domestic hot water by
adjusting the knob 11 a temperature may be obtained which va-
ries from about 36°C to about 60°C.
The value set previously will fl ash on the display.