22
2 3
1
5
7
6
8
4
W4
W5
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
HP high pressure switch
8
HP high pressure switch
W4
Boiler connector (gas side) – Main con-
trol panel
W5
HP-main control panel connector
Fig. 34