3
FUNCTIONING
Control Panel
35
30 24
27
28
34
33
36
31
32
29
24.- Display
27.- Setting key
28.- Setting key
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 (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 para-
graph 19 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
Turn off the boiler
- Press on key 29
, to switch off CH mode. The green indicators 30 will stop
- Switch off the main electrical supply
- Shut off the gas service tap 39 (fig. 21)
Note : In this conditions, the anti-freeze system is inoperative
Stand by mode
A fixed digit at the centre of the display and the green indicator 33 on
Putting the boiler in stand by mode and anti freeze system. :
Press on key 29
, to switch off CH mode. The green indicators 30 will stop.
During the all duration of the stand by mode, an automatic anti-sticking system will switch on the pump for 1
minute and make a movement of the 3 way valve each 23 hours.
The stand by mode will disable the anti-freeze function of the room thermostat (if fitted). To leave the room thermostat
anti freeze system operative, please let the Central Heating mode on.
The boiler is equipped with an automatic anti freeze system which permanently on.
If the Central Heating temperature decrease bellow 7°C, the pump will start.
If the Central Heating temperature decrease bellow 4°C, the pump and the burner will start.