11
KEY
1 - Flue exhaust manifold
2 - Condensate drain
3 - CH return
4 - CH return sensor
5 - Heat exchanger
6 - CH
fl
ow
7 - Overheat cut off thermostat
8 - CH
fl
ow sensor
9 - Manual air vent
10 - Burner
11 - Spark electrode
12 - Sensor electrode
13 - Fan
14 - Flue
temperature
temperature sensor
15 - Expansion vessel
16 - Automatic air vent
17 - Circulation pump
18 - Water pressure transducer
19 - Safety pressure relief valve
20 - Diverter valve motor
21 - Plate heat exchanger
22 - DHW sensor
23 - Gas valve
24 - Gas service cock
25 - CH compression ball valves
26 - DHW flow sensor
27 - DHW compression ball valves
2.1 OPERATING SCHEME (Fig. 4)
Fig. 4