Wood gasifying boiler ATTACK DPX COMBI PELLET

By installation of the burner into the steel body of the boiler ATTACK DPX you get the combined boiler for solid fuel and pellets with adjustable output, automatic grate cleaning, automatic start and termination of the burning process. The pellet burner is placed on a movable construction, which enables to insert the boiler easily into the upper door of the boiler and to remake the wood gasifying boiler into the pellet boiler. If the burner is not disposable, the burner can be simply dismantled and the boiler can be used as a standard wood gasifying boiler.

This innovative solution brings higher comfort thanks to the automatic pellet burner, which is simply installed in the boiler, and the advantage of the cheapest heat energy gained from wood in the wood gasifying boiler.

The boiler is controlled by the PROFI „PID“ regulator and burner electronics. Both regulators can be turned off by the main switch, according to the fuel used. It is possible to choose the burner of 8 – 30 kW or 15 – 50 kW output. The boiler is intended for economical and ecological heating of dwelling houses, cottages, small factories, workshops and similar objects.

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

		Type
Parameter	Unit	DPX 25 CP	DPX 30 CP	DPX 35 CP	DPX 40 CP	DPX 45 CP	DPX 50 CP
Nominal output – wood	kW	25	30	35	40	45	45
Nominal output – pellets	kW	30	30	30	40	45	49,9
Output range – wood	kW	12 – 25	15 – 30	17 – 35	20 – 40	22 – 45	22 – 45
Output range – pellets	kW	8 – 30	8 – 30	8 – 30	15 – 45	15 – 45	15 – 49,9
Heat exchange area	m²	2,52	2,78	2,78	3,03	3,03	3,03
Volume of feeding chamber	dm³	125	158	158	190	190	190
Dimension of feeding door	mm	235×445	235×445	235×445	235×445	235×445	235×445
Prescribed chimney draught	Pa	23	23	23	23	23	23
Max. operating overpressure of water	kPa	250
Pressure loss on the water side (ΔT 10 K)	kPa	2,3	4,4	4,4	6,6	6,6	6,6
Pressure loss on the water side (ΔT 20 K)	kPa	0,7	1	1	1,8	1,8	1,8
Boiler weight	kg	480	510	510	540	540	540
Diameter of flue gas connection	mm	150	150	150	150	150	150
Boiler height „A“	mm	1240	1240	1240	1240	1240	1240
Boiler width „B“	mm	760	760	760	760	760	760
Boiler depth „C“	mm	1250	1350	1350	1425	1425	1425
Boiler depth „C“ – with burner	mm	1510	1610	1610	1765	1765	1765
Length of feeding chamber „D“	mm	590	690	690	790	790	790
Grade of protection	IP	21
Electric power – wood	W	38	102	102	102	102	102
Electric power – pellets	W	96	160	160	190	190	190
Boiler efficiency – wood	%	90,4	90,1	90,1	90,2	90,2	90,2
Boiler efficiency – pellets	%	90,8	90,5	90,2	90,6	90,5	90,2
Boiler class by CO (under the norm EN 303-5)	–	5
Flue gas temperature by nominal output – wood	°C	165	170	185	170	180	185
Flue gas temperature by nominal output – pellets		145	152	168	148	155	164
Flue gas flow by nominal output – wood	kg/s	0,018	0,02	0,022	0,025	0,028	0,029
Flue gas flow by nominal output – pellets	kg/s	0,005	0,007	0,009	0,012	0,014	0,015
Max. noise level	dB	65
Prescribed fuel – wood	–	Wood logs with relative humidity min. 12 % – max. 20 %, ∅ 80 – 150 mm
Prescribed fuel – pelets	–	Wood pellets, Ø 6 mm, l = 35 mm, humidity max. 12 % (DIN 51 731 – HP 5, DIN Plus, alebo EN 14961-2 – A1)
Fuel consumption – wood	kg/h	6,5	7,8	9,1	10,4	11,75	11,75
Fuel consumption – pellets	kg/h	2,4 – 6,9	2,4 – 6,9	2,4 – 6,9	3,4 – 12,5	3,4 – 12,5	3,4 – 12,5
Approximate wood consumption per season	–	1 kW = 1 m3
Maximal length of wood logs	mm	550	650	650	750	750	750
Combustion time at nominal output	hod	4	4	4	4	4	4
Volume of water in the boiler	l	100	110	110	128	128	128
The minimum volume of buffer tank	l	625	750	900	1000	1200	1200
Capacity of the contacts of the boiler regulator	V / Hz	~230/50
Range to set the heating water temperature	°C	65 – 90