Baxi Nuvola3 Comfort 280 i

Product detailed description

Output: 10,4 – 28,0 kW, with DHW cylinder, flue gas discharge into the chimney -  Baxi Nuvola3 Comfort 280 i

Boilers with a built-in stainless steel cylinder (60 litres) The boiler includes a Baxi panel for controlling and programming the heating and DHW modes, with a weekly cycle, plus a built-in 2-litre DHW expansion vessel. This panel can be removed from the boiler and used as a room controller. Once an outdoor sensor is connected, it acts as a programmer for the built-in weather compensation control. The control unit and connecting fitting are included in the price. Other key features of the boilers: built-in stainless steel DHW cylinder, continuous power modulation, self-diagnostics, IP X5D electrical protection rating, patented AFR flue gas system for optimising combustion efficiency.

• Removable control panel with LCD display and central heating-control function
• Excellent DHW performance: up to 490 litres in 30 minutes (ΔT 30°C)
• 60-litre built-in stainless steel cylinder
• Built-in DHW expansion vessel

Hydraulic system

•   Electric three-way valve
• Steel burner
• Primary copper heat exchanger with a corrosion-resistant alloy coating
• 60-litre built-in AISI 316L stainless steel 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)
• Room thermostat and programming timer for 2 heating levels, included in the control panel
• DHW programming timer

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		NUVOLA 3 COMFORT 240 Fi	NUVOLA 3 COMFORT 140 Fi	NUVOLA 3 COMFORT 280 Fi	NUVOLA 3 COMFORT 320 Fi	NUVOLA 3 COMFORT 240 i	NUVOLA 3 COMFORT 280 i
Suitable for cascade connection
Rated heat output	(kW)	24,4	14	28	32	24,4	28
Reduced heat output	(kW)	10,4	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	30 - 85
Cylinder heating time	(min)	6	10	4	4	6	4
DHW output at a 30°C rise	(l/30 min)	390	280	450	490	390	450
DHW output at a 25°C rise	(l/min)	14	8,1	16,1	18,3	14	16,1
DHW output at a 35°C rise	(l/min)	10	5,8	11,5	13,1	10	11,5
Specific DHW flow rate	(l/min)	18,2	14,1	19	21,5	18,2	19
Coaxial flue diameter	(mm)	100/60	100/60	100/60	100/60	-	-
Twin-pipe flue diameter	(mm)	80	80	80	80	-	-
Flue diameter (chimney)	(mm)	-	-	-	-	140	140
Electric three-way valve		Yes	Yes	Yes	Yes	Yes	Yes
Electrical voltage / frequency	(V/Hz)	230/50	230/50	230/50	230/50	230/50	230/50
Rated electrical input	(W)	190	190	190	190	110	110
Weight	(kg)	70	70	70	70	60	60
Dimensions
Height	(mm)	950	950	950	950	950	950
Width	(mm)	600	600	600	600	600	600
Depth	(mm)	466	466	466	466	466	466