Baxi Nuvola 3 BS 280 Fi User Manual

51
7113868.01 - en
INSTRUCTIONS FOR FITTERS
The boiler has been designed in full compliance with European reference standards and in particular is tted with the following:
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140 Fi, 240 Fi and 280 Fi )
This switch allows the burner to switch on provided the exhaust ue duct efciency is perfect.
In the event of one or more of the following faults:
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The boiler will stay on stand-by and the display shows error code E03 (see section 9).
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This device has a sensor positioned on the left section of the fumes hood and shuts off the gas ow to the main burner
if the ue is obstructed and/or if there is no draught.
Under such conditions the boiler is blocked and only after the fault has been eliminated can it be ignited again
(see section 9).
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This device has a sensor positioned on the left section of the ue extraction hood and shuts off the gas ow to the
burner if the ue duct is obstructed or in the event of draught failure. Under such conditions the boiler is blocked and
only after the fault has been eliminated can it be ignited again (see section 9).
It is forbidden to disenable this safety device
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The ame sensing electrode guarantees safety of operation in case of gas failure or incomplete ignition of the main
burner.
In these conditions, the boiler blocks. See section 9 to RESET normal operating conditions.
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This device, mounted on the hydraulic unit, allows the main burner to be ignited only if heating circuit pressure is higher
than 0.5 bars.
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The electronically-controlled pump post-circulation function lasts 3 minutes and is enabled, in the heating mode, if the
ambient thermostat causes the main burner to go out.
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The electronic boiler management system includes a “frost protection” function for the heating system which, when
delivery temperature falls below 5°C, operates the burner until a delivery temperature of 30°C is reached. This function
is enabled when the boiler is switched on, the gas supply is open and the system is correctly pressurised.
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The anti-legionellosis function is NOT enabled.
To enable this function, set parameter F21=01 (as described in section 20). When the function is enabled, the electronic
management of the boiler, at weekly intervals, heats the water contained in the storage boiler to over 60°C (the function
only works if the water has never exceeded 60°C in the previous 7 days).
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If no heat demand is received in the heating and/or DHW modes for 24 consecutive hours, the pump will automatically
start and operate for 10 seconds. This function is operative when the boiler is powered.
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If no heat demand is received for a period of 24 hours, the three-way valve performs a complete switching cycle. This
function is operative when the boiler is powered.
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This device is set to 3 bar and is used for the heating circuit.
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This device is set to 8 bar and is used for the DHW circuit (storage boiler).
Connect the safety valves to a drain trap. Do not use it to drain the heating and/or DHW circuit.
21. ADJUSTMENT AND SAFETY DEVICES

Baxi Nuvola 3 BS 280 Fi Specifications

General

Brand	Baxi
Model	Nuvola 3 BS 280 Fi
Category	Boiler
Language	English