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3.4 Starting the Boiler
3.4.1 Preliminary Checks
Before starting the boiler it is necessary to perform the following checks:
- ue gas discharge pipe and its terminal are installed in accordance to the instructions: when the boiler is running no products
generated by combustion are to leak from any gasket;
- power supplied to the boiler is 230 V – 50 Hz;
- the system is correctly loaded with water (water pressure gauge reading is 1 / 1,3 bars);
- all system pipes stopcocks are open;
- the gas supplied to the boiler corresponds to that for which the boiler is manufactured: convert the boiler to the available gas when
necessary ( see section 3.6 “Adaptation to other gases and burner adjustment”. The procedure is to be carried out by qualied
technical personnel;
- the gas supply stopcock is open;
- there are no gas leaks;
- the main switch external to the boiler is set to on;
- the 3 bar safety valve is not blocked;
- there are no water leaks;
- the pump is not blocked.
3.4.2. Switching on and switching off
In switching on and switching off the boiler, follow the “Instructions for the user”.
3.5. Wiring Diagram
0SCHEMOD11: Electronic pcb
M1-M10: Power Supply connector, TA
M13: Connector for tele-metering
M2-M12: Service connectors
E: Detection/ignition electrode
P: Circulation pump
V: Fan (TFS models only)
TF: Thermostat preventing ue gas overow
PV: Fan pressure switch (TFS models only)
DK: Low water pressure switch
SR: CH probe 10 Ohm A 25°C B = 3435
SS: DHW probe 10 Ohm A 25°C B = 3435
TA: Ambient thermostat (option)
CM1-CM2: Boiler type and gas type selection jumpers
FL: Flow sensor
VG: Gas valve
TL: Limit thermostat
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