Ariston HS C 24 FF NG Installation And Servicing page 57

Initial procedures
To guarantee safety and the correct operation of the appliance,
the boiler must be prepared for operation by a qualified technician
who possesses the skills which are required by law.
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.
Filling the hydraulic circuit
Proceed in the following manner:
- Open cold water inlet tap;
- Lift the cap on the automatic air relief valve on the circulation
pump;
- Gradually open the valve under the boiler
- Open each air release tap starting with the lowest point and close it
only when clear water, free of air, is visible.
- Clause the valve under the boiler when at least 1 bar registers
on the pressure gauge.
Gas supply
Proceed in the following manner:
- make sure that the main gas supply uses the same type of gas
as indicated on the boiler data plate;
- Open all doors and windows;
- Make sure there are no sparks or naked flames in the room;
- Make sure that the system does not leak fuel using a cut-off
valve inside the boiler itself which should be closed and then
opened while the gas valve is disabled. The meter must not
show any signs of gas being used for 10 minutes.
Ignition procedure
Press the ON/OFF button on the control panel to switch on the
boiler. The display shows:
● the operating mode:
● The figures indicate:
- the set temperature in central heating mode
- the tset emperature of the hot water 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
HS C
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 efficient earthing system
- use a screwdriver to lift the cap on the automatic air relief
valve
- the system pressure is at least 1 bar on the pressure
gauge
2. Switch on the boiler (by pressing the
ON/OFF button) and select the standby
mode, where no hot water or heating
requests are made
3. Start the deaeration cycle by pressing
ON/OFF button for 5 seconds. The
boiler will start a deaeration cycle
lasting about 7 minutes. If you need to
stop it press ON/OFF. At the end, check
that the system is completely deaerated
and, if not, repeat the procedure
4. Bleed the air from the radiators
5. the exhaust duct for combustion products should be suitable
and free from any obstructions
6. any necessary ventilation inlets in the room should be open
(type B installation).
7. Open the gas valve and check the connection seals, including
the boiler connection seals, making sure that the meter does
not detect any passage of gas. Eliminate any leaks.
8. Start the boiler by selecting the heating or domestic hot water
operation.
Deaeration cycle
During the filling stage or if there is
excess air in the system, the deaeration
cycle can be activated by holding the
button 1 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 the button 1.
COMMISSIONING
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