HDG Navora 20/25/30kW Log Boiler

What is special about HDG Navora 20/25/30kW

Navora right view

Navora left view

Navora Loading Doors, with split inter door for clean smoke free operation

Navora Ash Pan, hidden away while not in use

Navora Loading door and ash door can be hinged from the right or the left

Navora Primary and secondry actuator control

Navora Fan assisted flue, Lamba controlled for high efficiency and clean operation

Navora cutaway diagram

Navora Auto cleaning system of boiler tubes and direct draught flap system

Navora Direct draught flap closed

Navora Direct draught flap open

Special features

• 91% efficiency
• Automatic cleaning of heat exchanger surfaces upon operation of the bypass damper
• Operated entirely from the front
• Meets the missions controls and safety requirements of most European countries
• Awarded the German KWF prize for innovation

Combustion-controlled, bottom-burning wood boiler

Type-tested to DIN EN 303-5 and DIN 4751-2, certified to EC Pressure Equipment Directive 97/23/EC. Pressure-tested, welded furnace body made of 5-6 mm tested boiler steel, fully lined filling chute (with heat-resistant special steel panels at particularly exposed points), sheet steel furnace lining, pre-assembled, powder-coated in green (RAL 6011) or yellow (RAL 1007) 80 mm glass wool insulation, safety heat exchanger fitted as standard.

Large fueling chamber

(150 liter, 560 mm deep) for logs up to 500mm and coarsely chopped wood for long refill intervals; highly temperature-resistant burn-off nozzle with special downstream combustion chamber for minimum emissions and maximum efficiency; power-controlled suction draught ventilator with servo drive for separate primary and secondary air control; oxygen and flue temperature sensors fitted ready to plug in; ergonomic design for convenient fueling using the large front door.

HDG Lambda Control 1 boiler control units

The boiler control units of HDG Lambda Control have ingenious combustion control systems. The combustion values are determined through the oxygen sensor and the flue gas sensor. These values are evaluated and the primary and secondary air flaps then precisely regulated for continuously optimal values even under variable conditions.

HDG Lamdba Control 1

Intelligent emission management

In the HDG Lambda-Control 1, the following parameters are continually measured and also shown on the display:

The residual oxygen in the flue gas (with the aid of the oxygen probe), in order to achieve optimal combustion.

The exhaust air temperature (with the aid of the flue gas temperature sensor), in order to achieve a constant degree of efficiency;

The temperatures of the boiler and acumulator storage tank, in order to determine their operating statuses.

Images:

• Navora Sectional View
• Navora Dimensions

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