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13
How to Use
Switching on
1. Check that pressure in central heating system is above 0.7 bar and below 1.5 bar with the pressure gauge 16.
2. Check that the gas service tap is opened at the gasmeter and main power is on. Green indicator
36.
3. Open the gas tap 42 (Fig.21).
The boiler is now ready to use.
Attention ! If the boiler stays a long time without working, some air in the gas pipe can hinder the first lightings. (please refer
to Section 18 Incorrect Function).
Switching on the Central Heating
Switching on the Domestic Hot Water
Keys 30
and 31
allow the adjustment of the temperature required for the Domestic Hot Water flow. During the
temperature setting operation the display will flash.
Note : The configuration of the C.H. system can generate some gravity effect when the boiler is set in DHW mode only. It may
result in a temperature rise of the heating pipes close to the boiler (or eventually a radiator). To avoid this it is possible during
the summer period (Central Heating switched off) To close the Central Heating flow isolating tap (40 Fig. 21). Don't forget to
open it before switching on the Central Heating mode again.
Switching on the Domestic Hot water and Central Heating together
Press key 32
the green indicator 33 will light.
Press key 28
the green indicator 29 will light.
If there is no water demand
In case of draw off
Press on key 32
, the green indicator 33 will light and the display will show the Heating
flow temperature.
Keys 34
and 35
allow the adjustment of the temperature required in the Central
Heating system dependent on the weather conditions.
• press
to increase the temperature when the weather is cold
• press
to decrease the temperature when the weather is fair
During the temperature setting operation the display will flash.
If the room thermostat is calling for heat, a dot will be displayed at the bottom of the 3rd digit
Press key 28
, the green indicator 29 will light :
If there is no water demand
the display will show the following graphic
In case of draw off
a square made of 4 digits will move clockwise on the display
the display will show the heating flow temperature
a square made of 4 digits will move clockwise on the display
Power ON
19
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