17
13 ADJUSTMENT AND SAFETY DEVICES
This unit is designed in accordance with European standards and directives and in particular with the following elements:
• Safety thermostat
A safety thermostat turns off the boiler if the water temperature is too high in the primary circuit. It is imperative to find the
cause of overheating before resetting.
IT IS FORBIDDEN TO DEACTIVATE THIS SAFETY DEVICE
• NTC flue gas sensor
This device is placed on the water-exchanger flue gas.
The electronic card on the control panel turns off the boiler if the temperature exceeds 110°C.
NB: the reset operation is only possible if the temperature is below 90°C
.
IT IS FORBIDDEN TO DEACTIVATE THIS SAFETY DEVICE
• Flame ionisation electrode
The flame detection electrode guarantees safety in the event of gas starvation or poor burner ignition.
In this case it turns off the boiler.
• Hydraulic pressure controller
This device allows the burner to start only if the water pressure is above 0.5 bar.
•
Heating circulator with post-circulation
The electronic control allows the heating pump a post-circulation of 3 minutes after the burner shuts down in heating
mode if the room thermostat calls for the burner stop
.
• Antifreeze protection
The boiler’s electronic control system included in heating mode or domestic hot Sanitary water production has a
protection against frost. If the water temperature falls below 6°C the burner starts up to reach a temperature of 30°C.
This function is only valid if the boiler is lit, gas is open, and water pressure is correct.
• Circulator blockage protection
If no request for heating or domestic hot water is received for 24 hours, the circulator starts automatically for 10 seconds
to avoid any blockage.
• Blockage protection in 3-way valve
If no heating demand is received for 24 hours, the 3-way valve automatically performs a complete operating cycle
.
• Safety valve (heating circuit)
This device limits the pressure in the heating circuit to 3 bar.
Do not use to drain the heating circuit.
• Heating circulator with pre-circulation
In the case of a heat request in heating mode, the unit can operate the circulator in pre-circulation before lighting the
burner. This pre-circulation phase may last a few minutes depending on the operating temperature and the installation
conditions.
To Next Page
Loading...
