1- ROOM THERMOSTAT (Opt.)
2- GAS VALVE MODULATOR
3- CH TEMPERATURE SENSOR
4- WATER PRESSURE SENSOR
5- LIMIT THERMOSTAT
6- AIR PRESSURE SWITCH
7- DHW TEMPERATURE SENSOR
8- TURBINE
9- OUTSIDE TEMP. (Optional)
10- PUMP
11- FAN
12- GAS VALVE
13- SUPPLY CABLE
14- 3 WAY VALVE
15- POTENTIOMETER DHW TEMP.
16- POTENTIOMETER CH. TEMP.
17- ON / OFF / RESET / SUMMER / WINTER MODE
18- FUSE
19- LCD DISPLAY
20- FAILURE LED
21- IGNITION AND IONISATION ELECTRODE
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