Ignition Procedure - Ariston CLAS HE R 12 Installation And Servicing Instructions

Ignition procedure

Press the ON/OFF button on the control panel to
switch on the boiler. The display shows:
The operating mode will be indicated by the three
figures marked out on the diagram above.
The first figure indicates the operating mode:
0 XX - Stand-by
C XX - Boiler active
c XX - "CH External Pump Overrun" - Heating exter-
nal pump overrun
F XX - -Anti-freeze protection enabled
The second and third figures indicate:
- the flow temperature when no heating requests have
been made
- the flow temperature in heating mode
- the flow temperature in anti-freeze mode.
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
efficient.
First ignition
1. Make sure that:
- The gas valve is closed;
- The electrical connection has been properly
carried out. Make sure that, the green/yellow
earthing wire is connected to an efficient
earthing system;
- Switch on the boiler (by pressing the ON/OFF
button)
- Bleed the air from the system;
- The flue system should be suitable and free from
any obstructions;
2. Open the gas isolating valve 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 turning on the time control +
ensure thermostats are calling for heat.
commissioning
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