Wood gasifying boiler ATTACK WFB

ATTACK WOOD FIRE BOILER is new, modern wood-gasifying boiler with low requirements for chimney draught with the output of 35 kW. Innovative wood-gasifying boiler is unique thanks to its high efficiency 89 %

Big feeding chamber

The advantage is big feeding chamber with the volume 200 litres with the possibility to load big wood logs. The lenght of chamber is 590 mm. It makes the work easier and saves the time by chopping the wood – customer cuts the wood to half-metres pieces.

Low requirements for chimney draught

The advantage of the boiler ATTACK WFB 35 is low requirements for chimney draught.

Innovative wood-gasifying boiler with manual supply ATTACK WFB 35 with the output 35 kW is unique thanks to its high efficiency 90 % and very long duration of continual burning by full use of feeding chamber which is 4-6 hours.

Protection against tars

You will not have the problems with tars with new wood-gasifying boiler. The boiler has a dry coat placed on four sides of the entire feeding chamber. Dry coat protects the boiler’s body from tars and acids.

Long life-time

The boiler is manufactured from the high quality special boiler steel of 6 mm to ensure long life-time.

Boiler regulation

Regulation PROFI

The ATTACK PROFI of the „PID“ generation is a kind of the advanced regulator, which enables to modulate the heat output in the ATTACK® wood gasifying boilers by regulation of the fan rotations. The well-readable display shows the necessary information and makes the boiler control easier.
The ATTACK SLX PROFI boiler brings the improvement of the PID regulation to control the fan rotations according to the temperature of water and flue gas and thereby to achieve the optimal efficiency. The regulator uses the advanced Fuzzy logic system for control to regulate the wood gasification system in the optimal way – to ensure the lowest heat loss possible.
The boiler equipped with the regulator ATTACK PROFI „PID” can control the heating system equipped with the following items: a pump for charging the accumulation tank, accumulation tank, circuit pump of heating circuits and room thermostat, by the lowest loss of heat energy possible. The regulator can be connected and set in the way enabling to control the pump of heating circuits and pump to charge the tank for domestic hot water.

Properties – regulation PROFI

innovated electronics with fluent PID regulation of the fan rotations according to the flue gas temperature
Fuzzy logic – optimal regulation of the operating cycle of wood burning
increased boiler efficiency and stable burning
several options of control, including the pump to charge the accumulation tank, pump to charge the D.H.W. tank and the circuit pump of the heating circuits
option to control the circuit pump by thermostat
well-readable display indicating the operation of particular elements

Boiler parameters

		Bolier type
Parameter	Unit	WFB35 – PROFI
Nominal output of boiler	kW	35
Output range	kW	17 – 33
Exchanger area	m²	4,2
Volume of feeding chamber	dm³	200
Dimension of feeding door	mm	380×370
Prescribed chimney draught	Pa	19
Max. operating overpressure of water	kPa	250
Weight of the boiler	kg	600
Diameter of the flue gas outlet	mm	150
Height of the boiler	mm	1420
Width of the boiler	mm	730
Depth of the boiler	mm	1280
Depth of the feeding chamber	mm	590
Diameter of the riser pipe		G 6/4“
Diameter of the reverse		G 6/4“
Protection class	IP	20
Electrical input at the nominal output	W	28
Electrical input at the standby	W	< 5
Boiler efficiency	%	88,7
Class of energy efficiency of the boiler	–	A+
Temperature of the flue gas by the nominal output	°C	150
Mass flow of the flue gas by the nominal output	kg/s	0,024
Max. noise level	dB	< 70
Class and the type of the fuel	–	A+, wood pieces with relative moisture of 12-20%, ∅ 50-150 mm
Average wood consumption	kg/h	4,5 – 8,9
Max. length of logs	mm	500
Time of burning by nominal output*	h	4
Water volume in the boiler	l	110
Recommended volume of the accumulation tank	l	2000
Voltage	V/Hz	230/50
Range of the setting the temperature of the heating water	°C	90
Capacity of the contacts of the boiler regulator (PROFI version)	–	2A/230V
* depending on the type of fuel and perfection of the feeding the chamber with wood