Ravelli HR EVO 200 SMART Use And Maintenance Manual page 152

Diagram 2 (buffer tank sensor)
Diagram 2 can be used in a system where there is a buffer tank that operates the heating system and, if pre-set, also DHW production.
In this system, the appliance is directly connected to the buffer tank.
In this type of circuit, room temperature is managed by a control unit (not supplied) that controls the buffer tank and any zone valves.
The buffer tank temperature is controlled by the appliance through a sensor.
The appliance operates at maximum power to reach the set buffer tank temperature. When it is reached, the appliance enters ECO
STOP mode and is automatically restarted if the buffer tank temperature falls below this value. The advantage of using a buffer tank
is that it regulates the operation of the appliance. The buffer tank can be connected to other heat production units, such as solar
panels and/or gas boiler.
LEGEND
Stufa a Pellet
1- Pellet stove / boiler 7- Check valve
2- Distribution manifolds 8- Group of direct distribution
3- Radiators 9- Thermostatic distribution unit
4- Thermometer 10- Radiant panel (underfloor heating)
5- Pressure gauge 11- Shut-off valve
6- Anti-condensation valve 12- Thermostat
The diagram shown here is indicative and may not display all the components required to properly operate the system. Rely on a
qualified thermal technician for the hydraulic system design.
Use and maintenance manual HR EVO Smart
13- Expansion vessel (tank)
14- Pump station for solar thermal system
15- Solar thermal collector
16- Thermostatic mixing valve
17- Booster pump
18- Buffer tank pipe in tank with DHW
Rev.1 08/09/2021
Pag.35
19- Motorised three-way valve with spring return
20- Gas boiler
EN