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7115344.01 - en
INSTRUCTIONS PERTAINING TO THE INSTALLER
The boiler has been designed in full compliance with European reference standards and in particular is equipped
with the following:
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This thermostat interrupts the gas flow to the main burner in case the water contained in the circuit has ove-
rheated. Under these conditions the boiler locks out and can only repeat the ignition procedure by pressing
of the reset button on the boiler after the cause of the trip has been rectified.
It is strictly forbidden to disable this safety device.
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This device, positioned on the flue inside the boiler, interrupts the flow of gas to the burner if the temperature
exceeds 90 °C. After verifying the cause of the trip, press the reset button positioned on the thermostat
itself, then press the reset button on the boiler.
It is forbidden to disenable this safety device
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This device is located on the exchanger flange and interrupts the flow of gas to the burner if the front insu-
lation yields and overheats the exchanger or the flange gasket develops a fault. Press the reset button on
the thermostat, eliminate the fault and then press the reset button on the boiler control panel.
It is forbidden to disenable this safety device
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This device is located at the rear of the exchanger and interrupts the flow of gas to the burner if the rear
insulation yields and overheats the exchanger. If this device cuts in, dismount the exchanger and replace
the thermal fuse (see paragraph “THERMAL FUSE REPLACEMENT OF HEAT EXCHANGER”).
It is forbidden to disenable this safety device
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The flame sensing electrode guarantees safety of operation in case of gas failure or incomplete interlighting
of the main burner.
Under such conditions the boiler is locked out.
You must press the reset button on the boiler to restore the normal operating conditions.
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The electronic control system keeps the pump operating for 10 minutes in central heating mode after the
room temperature thermostat has switched off the main burner.
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The boilers electronic management includes a “frost protection” function in the central heating system which
operates the burner to reach a heating flow temperature of 30°C when the system heating flow temperature
drops below 5 °C.
This function is enabled as long as the boiler is connected to the a.c. power supply gas supplies and the
pressure in the system is as specified.
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In case there is no call for heat either from the central heating system or from the DHW system for 24 hours
continous the pump will automatically switch on for 10 seconds.
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This device enables the main burner only to be switched on if the system pressure is over 0.5 bar.
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This device enables the burner only to be switched on if the gas pressure is over 12 mbar.
15. CONTROL AND OPERATION DEVICES