Ferroli Modena 80 E User Manual
MODENA 80 E
20
Fig. 29
Note: If the power supply cable has to be replaced, use “0.75mm (24/0.20) cable only to BS6500 with a maximum
external diameter of 8 mm.
external diameter of 8 mm.
Note - When connecting a room thermostat or external timer, do not link the power supply of these devices to the
switching contacts. The switch contacts must be voltage free. Any mains powered devices must utilise mains power
solely to drive the timer motor.
switching contacts. The switch contacts must be voltage free. Any mains powered devices must utilise mains power
solely to drive the timer motor.
Applying mains voltage to the switch contacts will irreparably damage the circuit board.
Although this boiler can also be used without a room thermostat, you are recommended to install one for the
following reasons:
Greater comfort conditions due to more accurate control of room temperature.
Greater energy savings.
following reasons:
Greater comfort conditions due to more accurate control of room temperature.
Greater energy savings.
3.10 Differential air pressure switch (fig. 2 - part 43)
The differential air pressure switch is a safety device which allows the main burner to ignite only after having verified
that the fan is working correctly. If the difference in pressure between the flue gas discharge pipe and the air intake
pipe is not at least equal to the minimum pressure switch calibration value, the pressure switch contacts do not close
and the gas valve is thus prevented from opening.
In addition, the electrical circuit of the boiler is designed so that if for any reason the air pressure switch contacts
remain closed when the fan stops, the burner will not start up again.
that the fan is working correctly. If the difference in pressure between the flue gas discharge pipe and the air intake
pipe is not at least equal to the minimum pressure switch calibration value, the pressure switch contacts do not close
and the gas valve is thus prevented from opening.
In addition, the electrical circuit of the boiler is designed so that if for any reason the air pressure switch contacts
remain closed when the fan stops, the burner will not start up again.
3.11 Checks
Fill the central heating system as described previously (3.11) and check there are no leaks in the domestic hot water
and boiler water circuits. Check that there are no gas leaks on the boiler or the supply to the boiler. Also check that
the electrical connections are correct.
and boiler water circuits. Check that there are no gas leaks on the boiler or the supply to the boiler. Also check that
the electrical connections are correct.
3.12 Installing a room thermostat (72) (fig. 48)
To connect the thermostat:
Open the electrical box on the base of the appliance and remove the “jumper cable” between terminals 4 and 5.
Connect the room thermostat (72) as shown in figure 48.
Open the electrical box on the base of the appliance and remove the “jumper cable” between terminals 4 and 5.
Connect the room thermostat (72) as shown in figure 48.
3.13 Ferroli Modena boiler programmer fixing (optional)