Gas And Water Circuits - Ariston microSYSTEM 21 RFFI Installation Instructions Manual

F . 2.13
IG
2.13 G W
AS AND ATER
F . 2.14
IG
1
2
3
4
5
6
7
8
9
10
11
C
IRCUITS
L :
EGEND
1. Fan
2. Main heat exchanger
3. Overheat thermostat
4. Burner
17
5. Ignition electrodes
6. Detection electrode
16
7. Regulation thermostat
8. Frost thermostat
9. Gas valve
10. Pump pressure switch
11. Safety valve (3 bar)
12. Boiler drain valve
13. Automatic by-pass
14. Pressure gauge
15. Circulation pump with automatic
air release valve
16. Expansion vessel
15
17. Air pressure switch
A. Central Heating Flow
14
C. Inlet Gas
13
E. Central Heating Return
12
15