Technical information

15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
LEGEND:
1.
Fan
2. Main heat exchanger
3. Overheat thermostat
4. Burner
5. Ignition electrodes
6.
Detection electrode
7.
Regulation ther
mostat
8. Frost thermostat
9.
Gas valve
10.
Pump pressure s
witch
11.
Saf
ety v
alv
e (3 bar)
12. Boiler drain valve
13.
A
utomatic by-pass
14.
Pressure gauge
15. Circulation pump with automatic
air release valve
16.
Expansion v
essel
17. Air pressure switch
A. Central Heating Flow
C. Inlet Gas
E. Central Heating Return
2.13 GAS AND WATER CIRCUITS
FIG. 2.14
FIG. 2.13