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2. How to Use
Switching on and filling instructions
1. Check the pressure in the central heating system is above 0.7 bar and below 1.5 bar with the pressure gauge 16 (fig.1),
should it be neccessary to re-pressurise the system,ensure the filling loop
45 (fig. 2) is attached, open the filling taps 43 & 44,
the pressure gauge will now start to rise, once the pressure reads 1.0 bar, close the filling taps and disconnect the filling loop.
2. Check that the gas service tap is opened at the gas meter and the main power is on. Green
indicator
27 Power ON
3. Open the gas tap
39 (fig.2).
4. The boiler is now ready to use.
NO
TE
: If the boiler is left off for a long time, some air in the gas pipe can hinder the first lighting
a
ttempts. (please refer to Section 19 Incorrect Function, page 47)
Tank pre-heating mode (System plus only)
Turn the control knob 30 between min and max. During the adjustment, flashes.
The flashing goes on for a while after the adjustment, then the display indicates the time.
Heating mode
Turn the control knob 31 between min and max. During the adjustment flashes.
The flashing goes on for a while after the adjustment, the display will then indicate:
- the central heating flow temperature if the room thermostat is calling for heat.
- the time if the room thermostat is OFF.
Room thermostat request symbol
BURNER ON and output level
The flame digits will increase or decrease depending on the output.
Flame digit
Burner ON
+
+
OP
EN
CL
OSED
When DHW is drawn, the display indicates the following:
"Programming" button: button not activated, the domestic hot water exchanger temperature holding function is
activated permanently.
"Yellow" button activated, the temperature holding function respects the programme (11 p.m. OFF, 6 a.m. ON, original
setting). The display indicates the following
Time setting
You can set the time by using the keys underneath the display.
P
ress the setting key for 5 seconds. The hour digits on the display will begin to flash. Set the correct time by using the or
keys. To alter the minutes, press the setting key again, the minute digits will begin to flash. Set the correct time by using
the or keys, once the correct time has been set, press the setting key once more to accept the time.
Note: This is not a timer for Central Heating control.
To obtain heating
Turn the Central heating knob (30 Fig.1) between mini and maxi.
During the setting flashes and displays the temperature the knob has been
set to.
The flashing will continue for a while after the setting and the display will then
indicate one of the following :
- the heating temperature when the room thermostat is ON (Calling).
- the time when the room thermostat is OFF (Satisfied).
Room thermostat request
pictogram