Water Circuit Overpressure Safety; Fume Extractor Fan Failure; Opening Safety Device For Fire-Door Ash-Door; Intended Use - Ravelli HR EVO 300 SMART Manuel D'installation, D'utilisation Et D'entretien

Rev.0 18/12/2019
use and maintenance manual
HR EVO 300-350 SMART
ENG
Pag.57
the siphon shape of the pellet chute.
the hopper temperature safety see par. 3.4.
Overcurrent protection device
The unit is protected against overcurrent by 2A fuses on the power
supply of the eletronic card.

Water circuit overpressure safety

Any overpressure of the water inside the chamber, by P>3 bar, is
discharged through activation of the safety valve installed in the
hydraulic system inside the boiler.
Do not tamper with the safety devices.

Fume extractor fan failure

If the fume extractor fan stops for any reason, the electronic
controller instantly stops the pellet supply, displaying the message
'AL4 FAN FAIL'.

Opening safety device for fire-door ash-door

The safety Microswitch operates when it detects fire or ash door
door opening, during normal boiler operation, the electronic control
instantly locks the supply of pellets showing the message " AL M
DOOR OPEN ".

Intended use

The pellet boiler has the advantage of combining the heat generated
by the combustion of wood with the convenience of automatic
water temperature management and the possibility of weekly
programming of switching on/off, as well as the connection of a
thermostat and/or chronothermostat and start-stop remote control.

DESCRIPTION OF THE BOILER

The boiler is designed and built to work safely if:
• it is installed by qualified staff according to the specific standards;
• it is used within the limits declared in the contract and herein;
• the operating manual procedures are followed;
• routine maintenance is carried out according to the times and