Hergom DERO Instrucciones Para Instalación, Uso Y Mantenimiento página 16

bar. Never connect directly to the fireplace heating
circuit.
OPEN VESSEL SYSTEM:
Make the filling the system with open expansion
vessel on the return of the fireplace heating. Never
make the filling directly with network pressure.
Place the open expansion tank at a height of
more than 3 meters from the highest point of the
radiators.
It is recommended to install a safety valve 3 bar.
Perform anti-ice coverage for the expansion tank
and drain tube.
CLOSED VESSEL SYSTEM:
The bolier has been verified in the factory at a
pressure of 5 bar. Make the filling the system at a
pressure not exceeding this.
It is mandatory to install a safety valve 3 bar.
COIL ASSEMBLING
Coil
FIG. 1
Coil water intake
FIG. 2
FIG. 3
Thermostatic Valve
(not included)
Coil drainage
FIG. 4