Baxi Condensing Gas Boiler Model NUVOLA DUO-TEC+ 33 GA VES with 40 Liter Methane or LPG Accumulation Complete with Fume Exhaust Kit Split Fume Kit, Methane/LPG

ATTENTION THE BOILER IS SUPPLIED WITH METHANE. LPG OPERATION THROUGH ADJUSTMENT BY THE AUTHORIZED ASSISTANCE CENTER. FOR INFORMATION, CONTACT BAXI SUPPORT IN ADVANCE

Technical features

• ErP energy efficiency class (heating and DHW): A
• Load profile: XL
• Nominal DHW heat output kW 34
• Nominal heating heat output kW 28.9
• Nominal domestic hot water heat output kW 33
• Useful efficiency (pci) Pn - average temperature 70°C: 97.7%
• Heating expansion vessel capacity 7.5 l
• Storage tank expansion tank capacity 2 l
• Domestic water temperature adjustment °C 35-60
• Kettle capacity 40 l
• Domestic water production ∆T 25°C l/min 18.9
• Domestic water production at discharge ∆T 30°C (1) l/30' 500
• Degree of protection: IPX5D
• NOx class (EN 483) 5
• Dimensions (hxwxd): 950x600x466 mm; 67.5 kg
• Power supply: METHANE or LPG

Nuvola Duo-Tec+

Digital control panel

The Duo-tec E range of boilers is equipped with a new digital control panel with a backlit LCD display, which is even clearer and easier to use thanks to dedicated and independent buttons for regulating the temperature of the domestic water and heating. The display allows you to view all the information and set the operating parameters in an intuitive and immediate way.

Efficiency and savings

Wide modulation range:

• greater efficiency given by fewer switching on and off: with a high modulation ratio, the reduction of continuous on/off cycles leads to a significant reduction in consumption (8-10%) and an equal reduction in polluting emissions

• adjustment of the thermal power produced to the power dissipated, thus avoiding excessive overheating/cooling of the rooms

GAC Gas Adaptive Control

It is an innovative system which, thanks to new control electronics and a new electronic gas valve, guarantees automatic combustion control to constantly maintain maximum efficiency values.

Advantages:

• there are no manual interventions – reduced measurements, calibrations

• with this system, the boiler self-adapts to the quality of the gas (methane) and the length of the fume exhaust pipes, maintaining constant efficiency

• the boiler also constantly self-regulates to maintain maximum efficiency values, favoring a reduction in gas consumption and generating less pollution thanks to the continuous control of emissions.

Total modulation pump with de-aeration

The circulation pump can operate at maximum speed, minimum speed or in "automatic" mode: in the latter case, the speed (min./max) will be selected so that the delivery/return ∆T in heating remains constant at 20 °C thus guaranteeing a significant reduction in pump consumption and, given the lower mechanical stress (compared to a pump that always operates at maximum speed), also in maintenance costs.

When switching on for the first time we recommend activating the automatic de-aeration function. The function allows you to eliminate the presence of air in the heating circuit and therefore avoid any blockages of the boiler, overheating of the system, etc.

Guidelines for replacing a conventional boiler with a new condensing one

There are two main problems that can be encountered:

• Flues and smoke exhaust duct
• Condensate drain

To overcome the above, Baxi recommends:

the use of a Ø50 mm exhaust pipe

Baxi has in fact developed a system that allows easy ducting into existing flues (for 24kW models).

For condensing boilers the novelty is brought by the low temperatures of the fumes which allow the use of specific plastic materials; however, in the presence of existing 316 stainless steel flues, installed correctly and with seals suitable for receiving humid fumes, there are no problems and they can easily be reconnected to the new boilers while it is absolutely not compliant to use aluminum flues or smoke pipes . In fact, aluminum is a metal that does not resist the acid condensations present in fumes.

(*) Each bend with a diameter of Ø50 mm decreases the length of the drain by 4m

the use of the condensate drain pump

Baxi has designed this kit to collect the condensate produced by condensing boilers for domestic use: the pump allows the creation of condensate drainage systems in the absence of natural drainage near the boiler. The operation of condensing boilers determines the formation of condensation, due to the principle of condensation. This water therefore needs to be disposed of through special drains. If there is no adequate slope and therefore it is not possible to dispose of the condensate by gravity, it is necessary to install a pump that conveys it towards the drains. The pumps used are also equipped with special anti-return valves to avoid bacterial contamination due to possible stagnation and return of waste water. The use of buildings avoiding the use of annoying pipes.

Characteristics :

• Wide 1:7 modulation range, greater efficiency and silence
• GAC (gas adaptive control): automatic combustion control
• Up to 500 l of hot water in 30 minutes (ΔT 30°C)
• 40 l stainless steel kettle
• Digital control panel with large backlit LCD display
• Compatibility with the Baxi Mago (accessory on request) for remote boiler control
• Sanitary expansion vessel available STANDARD (for 33 kW model) and as an accessory (for 24 kW model)
• Connection to a rigid and flexible Ø50 mm exhaust pipe: solution for renovating flues - mod. 24 kW total length 40 meters (intake+exhaust)
• STANDARD installation kit (gas tap / sanitary inlet / telescopic fittings)

hydraulic system

• Electric three-way diverter valve
• Stainless steel premix burner
• Stainless steel water-fume exchanger
• Stainless steel kettle
• Modulating fan with electronic speed variation
• Automatic by-pass
• High efficiency circulation pump with total modulation
• Pump and three-way valve anti-blocking system that intervenes every 24 hours
• 3 bar heating circuit safety valve
• 8 bar boiler safety valve
• DHW expansion vessel (2 litres) as standard for mod. 33 GA VES
• Preparation for sanitary recirculation

Thermoregulation system

• Climatic regulation as standard (with external probe available as an optional)
• Predisposition for connection to a zone system

Control system

• Safety thermostat against overtemperatures of the water/fume exchanger
• Hydraulic pressure switch that blocks the gas in case of water shortage
• Safety thermostat against fume overtemperatures
• Temperature control using NTC probes
• Anti-legionella function
• Total anti-freeze device
• Electronic thermometer
• Heating circuit digital pressure gauge

Product Warranty: All products on sale on our site are new and packaged. The warranty on this item is 24 months from the date of purchase.

• peso: 35.0 kg
• classe energetica produzione acs: A
• classe energetica riscaldamento: A
• gas: Methane/LPG
• marca: BAXI
• metri quadri : 220
• modello: Nuvola Duo-Tec+ 33
• potenza in kw: 33
• potenza nominale: 33
• superficie riscaldabile mq: 220
• tipologia : Ad accumulo