83
1.4
FUNCTIONAL DIAGRAM
Fig. 2
KEY
1 Fan
2 Water-gas exchanger
3 Breather valve
4 Gas valve
5 C.H. sensor (SM)
6 100°C safety stat
7 Air relief valve
8 Circulation pump
9 Expansion vessel
10 Safety valve
11 Boiler discharge
12 Water pressure transducer
13 Flowmeter
14 Automatic by-pass
15 C.H. return cock (optional)
16 C.H. flow cock (optional)
17 Gas cock (optional)
18 Fixing jig
19 90°C limit stat
20 Condensation water trap
21 Gas rate adjuster
22 System filling (optional)
23 Aqua Guard
24 Non return valve
1.5
MAIN COMPONENTS
Fig. 3
KEY
1 Control panel
2 Gas rate adjuster
3 Gas valve
4 Negative pressure take-off
5 Positive pressure take-off
6 Gas pressure take-off
7 Breather valve
8 Air pressure switch
9 Sensing electrode
10 Water-gas exchanger
11 Limit stat
12 Ignition electrode
13 Fan
14 100°C safety stat
15 C.H. sensor (SM)
16 Automatic breather
17 Aqua Guard
18 Flowmeter
19 Circulating pump
20 Non return valve
21 Smokes stat
