Gas wall hung condensing boilers with storage tank

Nuvola3 Comfort HT

Maximum DHW comfortNuvola3 Comfort HT is the wall hung condensing boiler with an integrated cylinder that guarantees high sanitary performances.Apart the advantages that derives in terms of performances from the condensing technology , Nuvola3 Comfort HT allows to have always large amounts of hot water also in case of input changes.

Nuvola3 Comfort HT

240 Heating and DHW production with integrated tank

20 kW 24 kW

330 Heating and DHW production with integrated tank

28 kW 33 kW

Hydraulic system3 way electric diverter valveStainless steel AISI 316L premixing burnerStainless steel AISI 316L heat exchangerStainless steel AISI 316L DHW cylinderModulating fan with electronic speed adjusting systemAutomatic by-passMulti-speeds low energy pump with automatic air ventSystem to prevent pump and diverter valve sticking operating every 24 hoursHeating circuit relief valve set at 3 barCylinder relief valve set at 8 barBuilt-in sanitary 2 litres expansion vesselSanitary recirculation option

Thermoregulation systemBuilt-in climatic regulation (outdoor sensor available as optional)Control of multi-zones system optionRoom sensor, central heating and sanitary timers included in the control panel

Control systemOverheat limit thermostat for the water/flue exchangerHydraulic pressure switch to prevent boiler operating in event of low waterOverheat limit thermostat against flues overheatElectronic temperatures control by NTC sensorsAnti-legionella functionFull anti-frost deviceElectronic thermometerHeating circuit pressure gauge

• Wide modulation ratio up to 1÷6 (240 model): better and noiseless boiler working • Up to 500 litres domestic hot water production in 30’ (ΔT 30°C)• Remote control with LCD display supplied with the boiler; it includes room thermostat, heating and sanitary timers functions• Stainless steel heat exchanger: reliability and long life• Mixed systems (low and high temperature) installation option• Built-in climatic regulation (outdoor sensor available as optional)• Built-in sanitary expansion vessel

Stainless steelAISI 316L DHW cylinderNuvola3 Comfort HTstorage is ideal in the event of simultaneous and big demandsof hot water.

Stainless steelheat exchanger:reliability and long life.

Combi with storage

240 330Maximum DHW heat input kW 24,7 34Maximum heating heat input kW 20,5 28,9Maximum DHW heat output kW 24 33Maximum heating heat output 80/60°C kW 20 28Maximum heating heat output 50/30°C kW 21,6 30,3Minimum heat output 80/60°C kW 4 9,4Minimum heat output 50/30°C kW 4,3 10,2

Energetic efficiency (92/42/CEE) HHHH HHHH

Average efficiency (DIN 4702-T8) % 109,8 109,8Nominal efficiency 80/60°C % 97,6 97,6Nominal efficiency 50/30°C % 105,1 105Efficiency 30% % 107,5 107,3NOx class (EN 483) 5 5Minimum working temperature °C -5 -5Expansion vessel capacity/pre-charge l/bar 7,5/0,5 7,5/0,5Heating temperature range °C 20/80 20/80DHW temperature range °C 35/60 35/60Cylinder capacity l 45 45Cylinder expansion vessel capacity/pre-charge l/bar 2/3,5 2/3,5Specific flow rate (EN 625) l/min 16,6 19,5DHW production ΔT 25°C (1) l/min 13,8 18,9DHW production at discharge ΔT 30°C (1) l/30’ 385 500

Maximum pressure heating circuit bar 3 3Maximum pressure DHW circuit bar 8 8Coaxial flue system Ø 60/100 max length m 10 10Dual flue system Ø 80 max length m 80 80Maximum flue mass flow rate kg/s 0,012 0,016Minimum flue mass flow rate kg/s 0,002 0,005Maximum flue temperature °C 73 75

Dimensions (h x w x d) mm 950x600x466 950x600x466Net weight Kg 66 66,5Gas type Natural gas/LPG Natural gas/LPGPower consumption W 150 160Grade of protection IPx5D IPx5D

(1) without flow restrictor.

Nuvola3 Comfort HT

The Company assumes no responsibility for any possible contents mistakes, and reserves the right to make changes in products, due to technical or commercial demands, at any time without notice.

Baxi S.p.A. 11-10

36061 BASSANO DEL GRAPPA (VI) ItalyVia Trozzetti, 20Tel. +39 0424 517111 - Fax: +39 0424 38089marketing@baxi.it

www.baxi.it

QualityEnvironment

Safety

QualityEnvironment

Safetyare Baxi strategic aims and the awarded certifications

ensure compliance with the specific regulations