5
user’s manual
Initial operating procedures
If the boiler is installed inside the apartment, make sure that
all provisions relating to the air inlet and room ventilation (in
compliance with current legislation) are respected.
Check the water pressure on the display regularly and make sure
that the fi 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 fi lling procedure.
Re-establish the correct pressure by fi 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.
Ignition procedure
Press the ON/OFF button
9
on the control panel to switch on the
boiler. The display shows:
●
the operating mode:
Winter
Summer
Only Heating
(CLAS HE EVO System)
●
The fi gures indicates:
- the fl ow temperature when no heating requests have been made
- the fl ow temperature in central heating mode
- the temperature of the hot water in domestic hot water
Operating mode selection
Use the MODE button
3
to select the desired operating mode.
Operating mode
Display
h hot water production for domestic use -
winter
hot water production for domestic use only -
summer
Only heating (only for System models)
The ignition of the burner is indicated on the display by the symbol
the dashes underneath indicate the power utilised. .
Note: Connections viewed from behind boiler
Note: Connections viewed from behind boiler
CLAS HE EVO
CLAS HE EVO SYSTEM
1. To repressurise the system ensure fl 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.
