Ignition procedure
Press the ON/OFF button on the control panel to switch on the
boiler. The display shows:
● the operating mode:
winter
summer
Only heating - CLAS SYSTEM ONE
● The gures indicate:
-
the ow temperature when no heating requests have been made
- the ow temperature in central heating mode
-
the temperature of the hot water set in domestic hot water
The carrying out of certain functions is shown:
Deaeration cycle started
Centrl Heating Post-circulation
D.H.W. circuit Post-circulation
Electricity supply
- Check that the voltage and frequency of the electricity supply
correspond to the data shown on the boiler data plate;
- Make sure that the earthing connection is efcient.
First ignition
1. Make sure that:
- The gas valve is closed;
- The electrical connection has been properly carried out.
Make sure that, in any case, the green/yellow earthing wire
is connected to an efcient earthing system;
- Use a screwdriver to lift the cap on the automatic air relief
valve;
- Switch on the boiler (by pressing the ON/
OFF button) and use the
button to
select the standby mode, where no hot
water or heating requests are made.
- Start the deaeration cycle by pressing
mode for 5 seconds
The boiler will start a deaeration cycle
lasting about 7 minutes (See below). If
you need to stop it press mode. During the deaeration cycle
open the manual air vent (2) on the heat exchanger and
close when clear water free of air is visible.
- At the end, check that the system is completely deaerated
and, if not, repeat the procedure.
- Bleed the air from the radiators;
- The exhaust duct for combustion products should be suitable
and free from any obstructions;
- Any necessary ventilation inlets in the room should be open
(type B installation).
- Check whether the condense trap contains water; if not, it
must be relled. If necessary, open the manual air vent on
the main exchanger until complete lling.
N.B.: if the boiler will not be used for long periods, the
trap should be lled before the boiler is started up again.
It is dangerous not to rell the siphon as fumes may be
released into the environment.
2. Open the gas cock and check the connection seals, including
the boiler connection joints, making sure that the meter does
not detect any passage of gas. Eliminate any leaks.
3. Start the boiler by selecting the heating or domestic hot
water operation using the
button.
Description of Function
Deaeration cycle
During the lling stage or if there is excess air in the system,
the deaeration cycle can be activated by holding the mode
button for 5 seconds. The boiler will start a cycle which lasts
approximately 7 minutes. When this is complete the menu screen
will be restored. The cycle may either be repeated, if necessary,
or stopped by pressing mode. Press the mode button until the
normal display screen is restored.
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