Initial operating procedures
Check the water pressure on the pressure gauge and make sure
that the 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 lling procedure - see note below.
Operating mode selection
Use the MODE button 3 to select the desired operating mode.
Operating mode
Display
heating + hot water production for domestic use -
WINTER
hot water production for domestic use only -
SUMMER
ONLY HEATING
CLAS SYSTEM ONE
The ignition of the burner is indicated on the display by the
symbol
the dashes underneath indicate the power
utilised.
Re-establish the correct pressure by 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.
Adjusting the heating
It is possible to set the temperature of the heating water by
pressing the buttons 8.
The temperature that may be obtained.which varies from 20°C
to 45°C (low temperature) and 35°C to 82°C (high temperature).
FILLING PROCEDURE
PURGE
Ignition procedure
Press the ON/OFF button on the control panel to switch on the
boiler
CLAS ONE / CLAS NET ONE
1. To repressurise the system ensure exible hose 3 is
connected
2. Slowly open taps 1 & 2 (see diagrams above)
3. Water will be heard entering the system
4. When the pressure gauge reads 1.5 bar close taps 1 & 2
1
1
2
2
3
3
Note.
Connections viewed from
behind boiler.
Note.
Connections viewed from
behind boiler.
CLAS SYSTEM ONE
The display shows :
- the operating mode:
- the set temperature in central heating mode
-
the set temperature of the hot water in domestic hot water
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