Protherm 100EC, User, Installation And Servicing Instructions, Page: 10 / 32

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8
100EC
1 – Air pressure switch
2 – Fan
3 – Combustion chamber
4 – Heat exchanger
5 – Burner
6 – Gas valve
7 – Expansion vessel
8 – Pump
9 – Water flow sensor
10 – Safety valve
11 – Heating return
12 – Domestic cold water inlet
13 – Gas inlet
14 – DHW thermistor
15 – DHW outlet
16 – Automatic by-pass
17 – Heating flow
18 – Drain point
19 – Water pressure sensor
20 – 3-way valve
21 – Actuator
22 – Domestic heat exchanger
23 – CH temperature sensor
24 – High limit thermostat
Diagram 4
BOILER SCHEMATIC