3
FUNCTIONING
Control panel
35
30 24 26
27
25
34
28
33
36
31
32
29
24.- Display
25.- Domestic Hot water switch
26.- Green indicator – Domestic Hot Water mode ON
27.- D.H.W. temperature reducing key
28.- D.H.W. temperature increasing key DHW mode indicator
29.- Central Heating switch
30.- Green indicator – Central Heating mode ON
31.- Central Heating temperature reducing key
32.- Central Heating temperature increasing key
33.- Green indicator – Power ON
34.- Orange indicator - Burner ON
35.- Red indicator - Lock out / flame failure
36.- Reset key
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
Power ON
33.
3. Open the gas tap
39.
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
paragraph 18 Incorrect Function)
Switching on Central heating
Press on key 29
, the green indicator 30 will light and the display will show the Heating
flow temperature.
Keys
31
and 32
allow to adjust the temperature required in the Central Heating system
regarding the weather conditions.
• press
to increase temperature when weather is cold
• press
to reduce temperature when 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
Switching on the Domestic Hot water
Press on key 25
, the green indicator 26 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
Keys
27
and 28
allow to adjust the temperature required for the Domestic Hot Water flow. During the temperature set-
ting operation the display will flash.
Note : The configuration of CH system can generate some gravity effect when the boiler is set in DHW mode only. It may result a
temperature rise of the heating pipes close to the boiler (or eventually a radiator). To avoid that, it is possible to close during sum-
mer period (Central Heating switched off) the heating flow isolating tap (
37). Don’t forget to open it when you will switch on the
Central Heating mode again.
