4
1.2 Hydraulic scheme of CH wall-mounted boilers
230 V, 50 Hz
A
G
B
1
2
3
4
5
6
7
9
10
1
A
Delivery pipe
B
Returning pipe
G
Gas connection
Electric control box
2
Gas inlet
3
Thermocouple
4
Burner
5
Heat exchanger
6
Delivery temperature
sensor NTC
7
8
Flue-gas backflow sensor
Limiter thermostat
9
Deflector
10 Purging screw
11
11
Pilot flame pipe
12
12 Magnetic valve
13 Gas valve
14
15
15
Pump
16
16 Expansion pipe
17
17 Mains connection
18
18 Room temperature controller
19
19 Charging-discharging valve
13
14 Display
Fig. 3.
8
