TD_HDG_FK
4Pages

HDG FK Hybrid functional principle log wood/pellet combination The HDG log wood/pellet combination has a shared hydraulic connection for supply/return (included in scope of delivery). This means that a shared return temperature control is sufficient for both combustion units. The HDG Control forms the core of combustion control for the HDG FK Hybrid. It controls all electronic processes required for heat generation and optimum combustion. In addition, the HDG Control features an integrated heating and system controller with connection options for accumulator management and system-dependent heating circuit controllers. Switching between log wood and pellet operation takes place automatically. Due to the extremely generously dimensioned fuel chamber door (47 cm x 42 cm on HDG F20/30 Hybrid and 52 cm x 54 cm on HDG F40/50 Hybrid) with additional inner lining and low filling edge (approx. 86 cm), the boiler is especially ergonomic and easy to fill. The door hinge of the fuel chamber door is on the right as standard but can be refitted on the left at any time on site. The integrated, standard cleaning turbulators can be operated conveniently from the front. The turbulators are used for cleaning the upright heat exchanger. They also contribute to maintaining the boiler output to an optimum level. The optional HDG automatic cleaning function automatically operates the cleaning turbulators at the press of a button. Opening the integrated flue gas flap allows the boiler to be safely and conveniently cleaned and also reheated if necessary. Flueby-pass damper closed Flueby-pass damper open The modularly structured hot combustion chamber is located directly under the fuel chamber according to the functional principle of downward combustion technology. The fuel gases produced are burned out here by addition of secondary air. The combustion chamber, which was specially developed for the HDG F Hybrid, essentially consists of individual refractory concrete firebricks which sit on an additional water chamber. This protects the combustion chamber from overheating. This works to actively prevent early wearing. The fuel chamber capacity of the HDG F20/30 Hybrid is 155 l, and of the HDG F40/50 Hybrid is 205 l. The fuel chamber casing consists of high-quality 6 mm steel sheet and is fully lined with high-quality flanged panel sections. The special construction of the side panels ensures the wood slips down and protects the panels against warpage. The fuel chamber capacity is an important reference point for the design of the required accumulator capacity. The wood goes through four different temperature zones in the fuel chamber. In the upper section, the firewood is “preheated”. The water bound in the firewood is evaporated at temperatures around 100°C. For non-polluting combustion, the firewood must be sufficiently split and contain less than 20% water content (25% wood moisture). Wood is composed of approximately 85 percent volatile components by weight, which account for about 70% of the heating energy. At temperatures up to approx. 600°C, the firewood is degassed with the addition of primary air. The added primary air also cools the lower parts of the side panels. The primary air is conducted through the side primary air opening into the lower fuel chamber area. The gases released in the first step are ultimately burned out with the addition of secondary air in the underlying hot combustion chamber (downward combustion technology). HDG Bavaria GmbH · D-84323 Massing · www. hdg-bavaria.com · All prices shown are exclusive of services and value added tax. Subject to technical or price changes and corrections. Our general terms and conditions apply exclusively. The high-temperature resistant, cast stainless steel burner nozzle is a floating fit in the split burner nozzle brick. The burner nozzle is a 2-piece design and extremely durable. Its special design allows the burner nozzle to expand evenly. The special design of the burner nozzle prevents the logs having an adverser effect on combustion gas extraction – which guarantees long life expectancy and optimum operational safety and reliability. The split nozzle brick encloses the secondary air duct in which the secondary air is pre-heated. In return, the nozzle brick is protected from ov

The pellets are fed into the combustion tray via a timer-controlled fuel metering auger and subsequent sloping fuel chute. The attached temperature monitor with integrated water reservoir provides for maximum operational safety and reliability. The interchanging operation with either log wood or pellets means that the two flue pipe connections can be combined in one flue. The pellet container is used as an interim storage area for the pellets before they reach the actual boiler. The container has a capacity of approx. 107 kg and can be filled manually, for example with bagged goods. As an...

11 Figures as per type-approval test to DIN EN 303-5 by TOV-Sud 2) Maximum operating temperatures of up to 110 °C can also briefly occur. 3) Observe country-specific guidelines HDG Bavaria GmbH ■ D-84323 Massing ■ www.hdg-bavaria.com ■ All prices shown are exclusive of services and value added tax. Subject to technical or price changes and corrections. Our general terms and conditions apply exclusively.

Price catalogue 2016/2017 Page 35 Minimum ceiling height: HDG FK 20/15 - 30/15 - 30/26: 1.90 m HDG FK 40/26 - 50/26: 2.00 m Recommended ceiling height: 2.30 m HDG Bavaria GmbH ■ D-84323 Massing ■ www.hdg-bavaria.com ■ All prices shown are exclusive of services and value added tax. Subject to technical or price changes and corrections. Our general terms and conditions apply exclusively.