AIC Nesta N 120 FS, Installation And Maintenance Manual, Page: 30 / 72

I-30
A-070336_EN • Rev. A
P
roduct
I
nstallatIon
Typical Hydraulic Connections - Heating Circuit
i
Isolating valve
Filling valve
Draining valve
Check valve
Expansion vessel
Removable fi lling hose
Circulating pump
Drain
Safety group (automatic air relief
valve, manometer, safety valve), con-
nected to the drain
Fig. 10. Typical Heating System
To make maintenance easier, we recommend to remove the plug from the drain connection
and install an optional draining valve (see “Fig. 3. Boiler Components - Front and Rear
Views” on page G-9).