Glow-worm 23c - Manual (Page 11)

11 2000225000B
5 Boiler Schematic
1 - Fan.
2 - Air pressure switch.
3 - Heat exchanger.
4 - Overheat thermostat.
5 - Combustion chamber.
6 - Expansion vessel.
7 - Ignition electrode.
8 - Burner.
9 - Flame sense electrode.
10 - Pump.
11 - Heating thermistor.
Diagram 5.1
9720
9321
A - Heating flow
B - Domestic hot water outlet
C - Gas
D - Cold water inlet
E - Heating return 12 - Ignition module.
13 - By-pass.
14 - Gas valve.
15 - Loss of water sensor.
16 - Domestic hot water thermistor
17 - Automatic air vent
18 - Domestic water flow sensor
19 - Filter cold water inlet
20 - Filling system
21 - Discharge safety valve (3bar)
22 - Heating filter
23 - Drain valve