Baxi Nuvola3 B40 280 Fi

Product detailed description

Output: 10,4 – 28,0 kW, with DHW cylinder, forced flue gas discharge (turbo) -  Baxi Nuvola3 B40 280 Fi

Boilers with a built-in 40-litre enamelled steel cylinder  Continuous power modulation, LCD display, self-diagnostics, IP X5D electrical protection rating, built-in enamelled DHW cylinder (double cobalt enamel), AFR flue gas system for optimised efficiency.

Power range from 14 to 28 kW - 40 l cylinder - digital control panel with LCD display and buttons for programming and adjustment: instant monitoring and diagnostics - ready for weather compensation control

Hydraulic system

• Electric three-way valve
• Steel burner
• Primary copper heat exchanger with a corrosion-resistant alloy coating
• 40-litre built-in enamelled cylinder
• Automatic bypass
• Low-consumption circulation pump with a built-in air vent
• Anti-seizing function for the pump and three-way valve, activating every 24 hours
• Heating circuit safety valve, 3 bar
• Cylinder safety valve, 8 bar

Heating control

• Two heating water temperature control ranges: 30/85°C, 30/45°C
• Built-in weather compensation control (activated once an outdoor sensor, available as an optional accessory, is connected)
• Option to connect continuous weather-compensated room control

Control and safety features

•  Primary heat exchanger overheat safety thermostat
• Hydraulic pressure switch that shuts off the gas supply in case of insufficient water
• Safety pressure switch for checking correct flue gas discharge (Fi models)
• Safety thermostat for checking correct flue gas discharge (i models)
• Pressure gauge
• Anti-freeze function
• Anti-legionella function
• Electronic thermometer
• Patented AFR air control system for optimising efficiency (Fi models with a split flue duct

General parameters:

		Heating + DHW
		turbo			chimney
Model		NUVOLA3 B40 140 Fi	NUVOLA3 B40 240 Fi	NUVOLA3 B40 280 Fi	NUVOLA3 B40 240 i	NUVOLA3 B40 280 i
Suitable for cascade connection
Rated heat output	(kW)	14	24,4	28	24,4	28
Reduced heat output	(kW)	5,8	10,4	10,4	10,4	10,4
Heating water temperature control range	(°C)	30 - 85	30 - 85	30 - 85	30 - 85	30 - 85
Cylinder heating time	(min)	10	6	4	6	-
DHW output at a 30°C rise	(l/30 min)	230	350	400	350	400
DHW output at a 25°C rise	(l/min)	8,1	14	16,1	14	16,1
DHW output at a 35°C rise	(l/min)	5,8	10	11,5	10	11,5
Specific DHW flow rate	(l/min)	14,1	14,5	15,5	14,5	15,5
Coaxial flue diameter	(mm)	100/60	100/60	100/60	-	-
Twin-pipe flue diameter	(mm)	80	80	80	-	-
Flue diameter (chimney)	(mm)	-	-	-	140	140
Electric three-way valve		Yes	Yes	Yes	Yes	Yes
Electrical voltage / frequency	(V/Hz)	230/50	230/50	230/50	230/50	230/50
Rated electrical input	(W)	190	190	190	110	110
Weight	(kg)	63	53	63	53	53
Dimensions
Height	(mm)	950	950	950	950	950
Width	(mm)	600	600	600	600	600
Depth	(mm)	466	466	466	466	466