Sime MURELLE REVOLUTION 25 User, Installation And Servicing Instructions page 18

System filling valve
1
Condensate outlet
2
Safety valve outlet
3
Liquid level indicator
4
Boiler drain
5
Thermostatic expansion valve
6
HP by-pass solenoid valve
7
18
1 2 3
HP high pressure switch
8
HP high pressure switch
9
Boiler connector (gas side) – Main
W4
control panel
HP-main control panel connector
W5
4 5 W4 W5
9
8
7
6
Fig. 34