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T e c h n i c a l N o t e b o o k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T e c h n i c a l T r a i n i n g
Hydraulic description of system (open-flue) appliances :
8
7
5
4
3
2
1
16
18
19
6
12
11
13
15
14
17
9
10
1
Pressure relief valve (3 bar)
2
Gas valve
3
Igniter
4
Burner
5
Heating flow temperature sensor
6
Ignition electrode
7
Combustion chamber
8
Heat exchanger
9
Draught diverter
10
Overflow safety device
11 Expansion vessel
12
Flame control electrode
13 Heating return temperature sensor
14 Pump air vent
15 Pump
16 Pressure sensor
17 By-pass
18
3-way valve
19 Drain cock
A
Heating flow
B
To cylinder coil or not connected
C
Gas inlet
D
From cylinder coil or not connected
E
Heating return
F
Drain pipe