Potterton Sirius two WH Instruction Manual page 22

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3
2
1
19
A
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B C D
18 17
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22
1 Fan
2 Air/gas blend manifold
3
Primary exchanger
4 Coaxial flue connector
5 Flue sensor
6 Automatic air vent
7 Ignition electrode
NTC water heating sensor
8
(flow and return)
Safety overflow temperature
9
thermostat
10 Flame detection electrode
11 Spark generator
12 Venturi
13 Pump
14 Hydraulic Safety valve
15 Boiler drain tap
16 Pressure gauge
17 Hydraulic Pressure Sensor
18
Gas pressure switch
19 Gas valve
A Trap condensate drain
B Gas inlet connection
C Heating flow connection
D Heating return connection