OPEN SYSTEM INSTALLATION DIAGRAM
Figure 3
1) Boiler
2) Flue gas connector
3) Distribution line
4) Open expansion vessel
5) Exhaust pipe
6) Radiator valve
7) Radiator
8) Air vent valve
9) Circulation pump
10) Return flow
11) Charge and discharge cock
12) Control valve
13) Thermal valve
14) Connection line for water supply system
15) Hot water discharge
16) Pressure gauge
