9
Fig. 3
1.6
MAIN COMPONENTS
KEY
1 Control panel
2 Pump
3 Gas valve
4 Flow switch
5 C.H. sensor (SM)
6 Condensate drain tap
7 Fan
8 Ionisation electrode
9 Ignition electrode
10 Primary heat exchanger
11 Exhaust fumes sensor (SF)
12 Auto air vent
13 Limit stat 90°C
14 Ignition transformer
15 D.H.W. combined temperature
and pressure relief valve
16 Expansion vessel
17 Safety thermostat 100°C
18 D.H.W. sensor (SB)
19 D.H.W. tank
20 D.H.W. expansion vessel
21 Tundish
22 C.H. safety valve 3 BAR
23 D.H.W. safety limit stat 85°C