Vaillant ecoTEC Pro VUW INT IV 286 / 5-3H dual-circuit condensing gas boiler
Wall-mounted gas condensing double-circuit boiler in the basic configuration with a capacity of 23, 28 and 34 kW
- High efficiency due to the use of condensation heat
- Fifth generation of condensing technology
- Reduced gas and electricity consumption
- Easy installation and access to all necessary components
- 23, 28 and 34 kW models
Energy Efficiency Class (A++–G) – Heating A Energy Efficiency Class (A–G) – Domestic Hot Water (DHW) A Technical Specifications Heat Output (at 50/30°C), kW 7.0–25.9 Heat Output (at 80/60°C), kW 6.2–24.0 Heat Output in DHW Mode, kW 28 Domestic Hot Water Flow Rate (ΔT = 30°C), l/min 2.0–13.4 Flue Gas Temperature (min/max), °C 40/71 Flue Gas Mass Flow Rate (min/max), g/s 2.96/13.0 Condensate Production (at 50/30°C, pH 3.5–4), l/h 2.5 Residual Head of Circulation Pump (nominal), mbar 250 Maximum Flow Temperature, °C 85 Domestic Hot Water Temperature, °C 35–65 Maximum Operating Pressure in Heating Circuit, bar 3 Maximum Operating Pressure in Water Supply Circuit, bar 10 Nominal Heating Water Flow Rate, l/h 1032 Power Supply, V/Hz 230/50 Maximum Electrical Power Consumption, W 85 Connections Gas Connection R 3/4" (DN 15 adapter included in delivery) Flue Connection 60/100 mm Heating Circuit Connection G 3/4" DHW Circuit Connection G 3/4" Dimensions and Weight Dimensions (H × W × D), mm 720 × 440 × 338 Weight (empty), kg 34.7 Notes Heat Output Data at 50/30°C Values refer to flow/return temperature 50/30°C
Heat Output Data at 80/60°C Values refer to flow/return temperature 80/60°C
Rated Output Data Data refer to the lower working calorific value (Hi) and only to heating mode operation
Gas Connection Adapter DN 15 mm – R 3/4" adapter is included in the delivery scope
- Gas wall-mounted heater using the latent heat of condensation
- Modulating burner, power range 28% to 100%
- DIA-System (digital information and analytical system)
- NOx class - 5
- Average efficiency for the heating season - 109%
Equipment
- New design
- Illuminated display with duplication of message codes in text line
- Built-in two-stage heating pump with automatic changeover
- Automatic air vent
- Safety valve
- 10 liter expansion tank
- Removal of condensate from the device and the chimney system through the built-in siphon
- Analog pressure sensor
- Stainless steel condensing heat exchanger
- Plate secondary heat exchanger for hot water
- Variable speed fan
- Pneumatic regulation of excess air ratio
- Forced premix burner
- Possibility of setting to partial power for heating and hot water
- Electronic ignition and control of the combustion process
- Integrated switching module for eBus interface
Installation options
- Heating and water heating
- Applicable for use in low-temperature systems of radiator and panel radiant heating
- Suitable for reconstructed and under construction houses and apartments
- Possibility of using combustion air both from inside and outside
- NOT USED IN CASCADE INSTALLATIONS
Condensing boiler
Uses the latent heat of exhaust gas vapors. The efficiency of such boilers reaches 107-109% compared to the average efficiency of traditional non-condensing gas boilers. Condensing gas boilers allow you to save up to 20-25% of fuel during the heating season, which means saving you and your customers money!
Turbocharged boiler
Depending on the design solution of the boiler room, it allows organizing an air supply and smoke exhaust system through the wall.
