Ravelli HR EVO 200 SMART, Use And Maintenance Manual

Page: 138 / 357

Use and maintenance manual HR EVO Smart
Pag.21
Rev.1 08/09/2021
EN
Safety devices
The boiler has been designed and equipped with safety systems to minimize user risks.
It is equipped with the safety devices listed in the following table, which also intervene in case of failure of the electronic board.
Element Description
Water temperature thermostat
If the water temperature exceeds the set safety value, it immediately stops the pellet
loading motor and the boiler is automatically switched off; to restart it, it is necessary to
wait until it has cooled down and manually reset the thermostat, using the appropriate
button.
Pellet tank thermostat
If the temperature exceeds the set safety value, it immediately stops the pellet loading
motor and the boiler is automatically switched off; to restart it, it is necessary to wait until
it has cooled down and manually reset the thermostat, using the appropriate button.
Pressure switch
If the pressure in the smoke outlet duct is too high (a sign that the smoke evacuation sys-
tem is obstructed) it immediately stops the pellet loading motor and the boiler switches
off automatically.
Combustion chamber door closing
limit switch, the ash drawer and pellet
hopper lid
If the door of the combustion chamber, the ash drawer and pellet hopper lid are not prop-
erly closed, they immediately stop the pellet loading motor; if they are not closed within
60 seconds, the boiler switches off automatically.
Safety valve for water overpressure
In the event of overpressure of the hydraulic system, the safety valve opens discharging
water, so that the boiler is not damaged.
Electrical safety
In case of failure of the electrical components or wiring, the fuse and grounding keep the
appliance safe. It is necessary that the electrical system of the house is up to standard,
equipped with a grounding circuit and all the safety systems required by the standards.
It should be noted that the boiler’s operating program has been designed to stop boiler operation in the event of malfunctions:
Anomalies Description
Temperature in the combustion
chamber
If the temperature probe in the combustion chamber detects temperatures that are too
high or too low, the boiler is switched off and the relative alarm is displayed.
Flue gas temperature
If the temperature probe at the smoke outlet detects temperatures that are too high, the
boiler is switched off and the relative alarm is displayed.
Water over-temperature
If the water temperature in the boiler, detected by the appropriate probe, is too high, the
boiler is switched off and the relative alarm is displayed.
Water pressure
If the water pressure in the boiler, detected by the pressure transducer, is too high or too
low, the boiler is switched off and the relative alarm is displayed.
Smoke fan break
If the fan stops, the electronic board blocks the supply of pellets and the alarm is dis-
played.
Gear motor failure If the gear motor stops, the appliance switches off safely.
Temporary power failure
If a power failure occurs during operation, when the power returns the temperature in the
combustion chamber is checked and, if necessary, the boiler goes into cooling mode.
No ignition If no flame develops during the ignition phase, the boiler goes into alarm.
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It is forbidden to tamper with the safety devices. Restarting the product is only possible after eliminating the cause that
caused the intervention of the safety system. To understand which anomaly occurs, consult this manual which explains,
depending on the alarm message that the device displays, how to intervene on it.
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If the problem persists, contact the Support Service.