BLT reference number: 077/05 BLT approval number: 075/07

Pellet burner

EVOTHERM P 100 ECO

Applicant and manufacturer:

EVOTHERM

Heiztechnik Vertriebs GmbH

Seeleiten 24

AT 5120 St. Pantaleon

AT 3250 Wieselburg, Rottenhauser Straße 1

Tel.: +43 7416 52175 – 0, Fax: +43 7416 52175 – 45

blt@josephinum.at, http://blt.josephinum.at

TEST REPORT
The BLT Wieselburg is an accredited burner test centre issued with identification number 112 according 

accreditation law BGBl. No. 468/1992. The quality management system complies with the requirements 

defined in ÖVE/ÖNORM EN ISOIEC 17 025.

Rottenhauser Straße 1

A 3250 Wieselburg

Austria / Österreich

Tel.: +43-7416-52175-0

Fax: +43-7416-52175-45

E-Mail: blt@josephinum.at

Internet: http://blt.josephinum.at

The test results detailed in this test report exclusively refer to the test piece specified in the chapter 

„Boiler plate information“.

The test report must be published only literally and unabridged.

Exceptions have to be authorized by Francisco Josephinum BLT.

Authorized translation

In the event of doubt the German original shall prevail.

Page I

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

TABLE OF CONTENTS

Page

1 DESCRIPTION ...................................................................................................................... 1

1.1 General.....................................................................................................................................1

1.2 Boiler plate information .............................................................................................................1

1.3 Diagram of the burner ...............................................................................................................2

1.4 Technical data ..........................................................................................................................2

2 TEST AND RESULTS ........................................................................................................... 3

2.1 Test setup – measurement methods .........................................................................................3

2.2 Performance of heating tests ....................................................................................................4

2.3 Interpretation of emission measurements..................................................................................4

2.4 Investigatory heating tests with wood pellets at nominal heat output..........................................5

2.4.1 Emission measurements...............................................................................................6

2.4.2 Evaluation ....................................................................................................................6

2.4.3 Output-related measurements.......................................................................................7

2.4.4 Flue gas composition....................................................................................................8

2.5 Investigatory heating tests with wood pellets at minimum heat output .......................................9

2.5.1 Emission measurements.............................................................................................10

2.5.2 Evaluation ..................................................................................................................10

2.5.3 Output-related measurements.....................................................................................11

2.5.4 Flue gas composition..................................................................................................12

2.6 Surface losses ........................................................................................................................13

2.7 Water-side resistance of boiler................................................................................................13

2.8 Electrical power consumption..................................................................................................14

2.8.1 Average electrical power consumption at nominal heat output, minimum heat output, 

on standby position and ignition ..................................................................................14

2.8.2 Electrical power consumption of main loads................................................................14

3 SUMMARY OF RESULTS ................................................................................................... 14

3.1 Heating tests...........................................................................................................................14

3.2 Function check of the temperature controller / safety temperature limiter on the boiler............15

3.3 Function check to verify the rapid shutdown of the system ......................................................15

4 ASSESSMENT .................................................................................................................... 16

5 APPENDIX .......................................................................................................................... 17

5.1 Legal requirements (for information only)................................................................................17

5.2 Surface temperature measuring points....................................................................................18
Page II

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

APPLIED STANDARDS

[1] ÖNORM EN 303-5:1999 Heating boilers for solid fuels, hand and automatically stoked, nominal heat output of up to 300 kW

[2] ÖNORM EN 304:2005 Heating boilers. Test code for heating boilers for atomising oil burners

[3] ÖNORM EN 267:1999 Forced draught oil burners – definitions, requirements, testing, marking

[4] ÖNORM M 7132:1998 Energy-efficient use of wood and bark as fuel –

Definition and features

[5] ÖNORM M 7135:2000 Compressed wood and compressed bark in natural state – Pellets 

and briquettes – Requirements and test specifications

[6] DIN 4702-1:1990 Central heating boilers – Terms, requirements, testing, marking

[7] DIN 4702-2:1990 Central heating boilers – Test code

[8] ÖNORM M 5861-1:1993 Manual determination of dust concentrations in drifty gases – Gravimetric method – General requirements

[9] ÖNORM M 5861-2:1994 Manual determination of dust concentrations in drifty gases – Gravimetric method – Special measuring requirements

BASICALLY APPLIED STANDARDS

[1] ÖNORM EN 13284-1:2002 Stationary source emissions – Determination of low range mass 

concentration of dust – Part 1: Manual gravimetric method

[2] VDI 2066-1:2006 Measuring of particles, determination of dust in drifty gases, gravimetric method of dust loading
Page 1 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

1 DESCRIPTION

1.1 General

The tested pellet burner EVOTHERM P 100 ECO manufactured by Evotherm Heiztechnik Vertriebs GmbH with a nominal heat output of 105,0 kW comprises a boiler with integrated combustion chamber and a vertically arranged three-pipe heat exchanger, a fuel feeding system with integrated burn-back protection device and the stoker screw. The burner is equipped with an electric 

ignition fan, an automatic cleaning system for the heat exchanger, a speed-controlled draught fan 

and combustion fan, a Lambda sensor, a SPS-system with control panel and the display with associated switches and sensors.

A cuboid sheet metal storage container was used to perform the tests. The screw conveyor for the 

fuel extraction is directly driven by a gear motor and transports the pellets to the downpipe with integrated burn-back flap. The stoker screw transports the fuel on the front side from below to the 

combustion chamber with movable step grate. A firebed sensor is controlling constant supplies. 

The combustion chamber is automatically cleaned from the ashes via a vertical shaft on the back 

of the step grate.

The speed-controlled combustion fans direct the combustion air as primary air flow through the 

fuel bed and as secondary air flow to the fuel gases. The hot fuel gases pass through the automatically cleaned three-pipe heat exchanger and release their heat. At the outlet of the heat exchanger the speed-controlled draught fan, the Lambda sensor and the flue gas sensor are installed. The fuel is automatically ignited with a hot air blower. Below the combustion chamber the 

ash container is situated which is automatically drained off. An electric control system ensures the 

automatic operation of the system. Once the system has been switched on, the fuel is conveyed to 

the combustion chamber and then ignited with an electric ignition. The optimal boiler temperature 

is monitored by the control system. For optimizing the heat transfer the fuel volume, the primary 

air and secondary air flow are regulated by the control system via a firebed sensor, the Lambda 

sensor and the temperature sensor.

The combustion chamber and the heat exchanger are thermally insulated from the outside.

1.2 Boiler plate information
Page 2 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

1.3 Diagram of the burner

1.4 Technical data

Parameter – Overall dimensions of burner Value Unit

Overall width of burner 900 mm

Overall depth incl. draught fan, without stoker unit 2040 mm

Overall height 1820 mm

Diameter of flue gas pipe 200 mm

Height to centre of flue gas pipe 1853 mm

Flow / return connection 6/4 "

Water capacity (measured) 153 l

Thickness of sheets exposed to fire 8 mm

Thermal insulation 100 mm

Total weight of boiler incl. stoker unit 1049 kg

Source: Measurements by BLT Wieselburg
Page 3 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2 TEST AND RESULTS

Measurements were taken to determine the heat output, boiler efficiency (direct method), flue gas 

composition, flue gas temperature in the measuring section, feed pressure (draught), emission 

characteristics and the electrical power consumption. The surface temperatures were measured at 

nominal heat output and at stationary operation; this allowed the surface losses to be estimated.

The measurement equipment and the measurement methods correspond to ÖNORM EN 303-

5:1999, ÖNORM EN 304:2005 and EN 267:1999. The measurement accuracy and the measurement uncertainty are stated in the procedures for verification in the quality management manual 

issued by the Federal Institute of Agricultural Engineering (Bundesanstalt für Landtechnik).

2.1 Test setup – measurement methods

BOILER TEST RIG WITH HEAT EXCHANGER: Heat output measurement by directly measuring 

the amount of water circulated through the heating circuit and its temperature increase (DIN 4702-

2:1990).

FLUE GAS EXTRACTION through a vertical measuring section, generating the feed pressure using a prefabricated flue pipe, diameter 300 mm, height above ground level 9 m, feed pressure limited by draught restriction flap.

HEAT OUTPUT MEASUREMENT: Determining the mass flow using the Coriolis mass flow meter 

PROMASS 83 F from Endress & Hauser, as well as the water temperatures at the boiler 

flow/return using a Pt 100 resistance thermometer, 1/3 DIN, calibrated as a pair.

FLUE GAS TEMPERATURE in the measuring section using a measurement system with 5 Pt 100 

resistance thermometers.

FEED PRESSURE with a differential pressure transducer (Delta-P P92K), measurement range 0-

100 Pa.

WATER-SIDE RESISTANCE: Differential pressure transducer with ceramic measuring membranes DELTABARS PMD 70 from Endress & Hauser.

CARBON DIOXIDE AND CARBON MONOXIDE CONTENT: Non-dispersive infrared gas analyser 

NGA 2000 from Emerson; carbon dioxide: lowest measurement range 0 - 5 %, highest measurement range 0 - 20 %; carbon monoxide: CO Low - lowest measurement range 0 - 50 ppm, highest 

measurement range 0 - 2500 ppm; CO High – lowest measurement range 0 -1.0 %, highest measurement range 0 -10 %; measured in dry flue gas.

DUST CONTENT: Measuring device for gravimetric determination of total dust by company Paul 

Gothe GmbH according to ÖNORM EN 13284-1:2002 with a nominal suction quantity of 6 m3/ h, 

dust separation on stuffed quartz wool filter; filter is located directly after sampling probe and elbow, determination of partial flow volume by dry gas meter and upstream drying tower. The sampling point for determination of dust content is arranged directly after the measuring section.

CONTENT OF ORGANIC GASEOUS SUBSTANCES: Flame ionisation detector JUM, Type VE 

5; samples taken via heated filter and heated pipe (thermostatically controlled to 180 °C); measured in damp flue gas.

NITROGEN MONOXIDE CONTENT: Gas analyser from ECO Physics Type CLD 700 E1-ht; 

chemiluminescent measurement principle; samples taken via heated filter and heated pipe; gas 

cooler; measured in dry flue gas.
Page 4 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

ELECTRICAL POWER CONSUMPTION: Modular energy meter ULYS ETD from ENERDIS, 

threephase 100-400 with a measurement accuracy for active energy corresponding to IEC 

61036/EN61036 C1.1. Maximum resolution of the pulse output: 0,1 Wh.

Power Analyzer Norma 4000 with 3 Power Phase PP40 with following specifications: 8 measurement ranges for voltage (0,3 / 1 / 3 / 10 / 100 / 300 / 1000 V), 6 measurement ranges for current 

(30 – 100 mA – 0,3 – 1 – 3 – 10 A). The measurement accuracy of +/- 0,1 % of measured value 

and 0,1% of measuring range, Sample Rate 341 kHz, bandwidth for voltage 3 MHz.

DATA LOGGING using TopMessage data logging system from Delphin Technologie AG, sampling 

interval 1 second, average value determined from 10 measurements, average data stored to media.

2.2 Performance of heating tests

HEAT OUTPUT: The measurements were carried out in accordance with ÖNORM EN 303-5:1999 

at nominal and minimum heat output (< 30 % of the nominal heat output) respectively. The nominal heat output measurements were performed after the burner had been in operation for at least 3 

hours in the nominal heat output range. The measurements themselves were taken over a test period of at least 6 hours. The efficiency was calculated by taking into account the heat stored in the 

boiler water.

GASEOUS EMISSIONS: Carbon dioxide, carbon monoxide, organic carbon and nitrogen oxide 

values were averaged over the whole test duration. 

DUST CONTENT: For determining the dust content, basically according to ÖNORM EN 13284-

1:2002, the extraction time per filter was limited to 30 minutes. The dust content was determined 

by 6 half-hourly averages, evenly distributed over the test duration. Calibration gases were used to 

check the gas analysers before and after every test period.

SETTINGS: The declared measurements relate to reproducible tests using optimised settings. The 

settings were made during preliminary tests based on recommendations of the manufacturer. It 

was aspired to maximise the carbon dioxide content whilst at the same time minimising the carbon 

monoxide content. 

FUEL: The measurements were performed with wood pellets according to ÖNORM M 7135:2000 

with a diameter of 6 mm and a water content of 6,8 % and 6,9 %. The water content, the ash content and the calorific value were determined; the average values of the chemical data relating to 

the water- and ash-free substance were taken from ÖNORM M 7132:1998.

FUNCTION CHECK of the temperature controller, safety temperature limiter and monitor and the 

installation to verify the rapid shutdown of the system. The measurements were performed as 

specified in 5.13 and 5.14 of ÖNORM EN 303-5:1999. 

2.3 Interpretation of emission measurements

The emission measurements were analysed by calculating the complete flue gas analysis using 

the carbon monoxide and carbon dioxide content averaged over the measurement period together 

with the fuel composition data. The speed of the flue gas at the measuring point was calculated 

from the flue gas volume taking into account the pressure and temperature.

The content of organic gaseous substances was measured in damp flue gas; the emissions were 

then converted for dry flue gas conditions and declared as organic carbon. The content of nitrogen 

oxides was measured in dry flue gas and declared as NO2.
Page 5 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.4 Investigatory heating tests with wood pellets at nominal heat output

 Number of test: HKA_1518

 Name of boiler: Pellet burner EVOTHERM P 100 ECO

 Nominal heat output: 105 kW

 Minimum Average Maximum

 value value value

Test conditions

 Start of test: 2007-06-20 07:59

 End of test: 2007-06-20 14:01

 Test duration: 06:02

 Ambient temperature: °C 24,6 27,9 29,4

 Outside temperature: °C 23,7 27,0 31,0

 Air pressure: mbar 990

Test fuel, heat input

 Test fuel Wood pellets 07_0599 

 Water content kg/kg 0,068

 Ash content kg/kg 0,003

 Carbon content kg/kg 0,472

 Hydrogen content kg/kg 0,058

 Oxygen content kg/kg 0,400

 Calorific value of anhydrous

 and ash-free substance MJ/kg 18,9

 Calorific value of test fuel MJ/kg 17,4

 Applied fuel quantity kg 138,9

 Hourly fuel quantity kg/h 23,0

 Fuel heat input kW 111,4

Heat output, efficiency

 Water circulation kg/h 5274,6 5294,1 5311,3

 Flow temperature °C 56,5 56,7 56,9

 Return temperature °C 72,5 73,8 74,3

 Temperature difference K 15,8 17,1 17,6

 Heat output kW 105,5

 Utilisation % 100,5

 Boiler efficiency % 94,8

Measured values at flue gas measuring section

 Flue gas temperature °C 101,6 104,0 105,5

 Manometric pressure Pa 8,7 12,1 21,7

 Carbon dioxide % 13,1 14,7 16,5

 Carbon monoxide ppm 1,0 73,7 492,3

 Organic gaseous substances ppm 0,7 1,1 4,3

 Nitrogen monoxide ppm 87,2 98,9 107,0
Page 6 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.4.1 Emission measurements

Measurement results test: HKA_1518

(Calculation depending on CO2-measurement)

Suction start: hh:mm 08:02 09:00 10:00 11:00 12:00 13:00

Suction period: min 30 30 30 30 30 30

Suctioned gas sample: m3 0,320 0,327 0,319 0,329 0,336 0,328

Measured CO2-content: % 14,5 14,6 14,7 14,8 14,7 14,7

Calculated O2-content: % 5,9 5,8 5,7 5,6 5,7 5,7

Density of gas sample:

Dry gas kg/Nm3 1,36 1,36 1,36 1,37 1,36 1,36

Humid gas kg/Nm3 1,30 1,30 1,30 1,30 1,30 1,30

Water content g/Nm3 85,7 86,3 86,8 87,3 86,9 86,8

Flue gas mass flow:

Dry gas kg/kg 8,3 8,2 8,2 8,1 8,2 8,2

Velocity:

at sampling point m/s 1,95 1,94 1,93 1,92 1,93 1,94

at probe head m/s 0,94 0,95 0,92 0,95 0,95 0,91

Dust content:

separated mg 5,5 4,2 4,0 5,2 6,1 7,4

separated relating

to sample volume mg/Nm3 20,3 15,2 14,9 19,0 22,3 28,2

2.4.2 Evaluation

 relating to relating to

 applied energy O2-content of

 10 % 13 %

 mg/MJ mg/Nm3 mg/Nm3

 Dust 7 14 10

 Carbon monoxide(CO) 32 66 48

 Organic gaseous

 substances (OGC) <1 1 1

 Nitrogen oxides (NOx) 71 148 108
Page 7 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.4.3 Output-related measurements

0 6

0

12

0

18

0

24

0

300 36

Time [min] 0

0

2

0

4

0

6

0

8

0

10

0

12

0

[kW]

Heat output

HKA_1518

0 6

0

12

0

18

0

24

0

300 36

Time [min] 0

0

5

0

10

0

15

0

20

0

25

0

30

0

[°C]

Flue gas temp.

Flow temp.

Return temp.

HKA_1518
Page 8 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.4.4 Flue gas composition

0 6

0

12

0

18

0

24

0

300 36

Time [min] 0

0

4

8

1

2

1

6

2

0

2

4

CO2 [%]

0

10

0

20

0

30

0

40

0

50

0

60

0

CO [ppm]

Carbon dioxide

Carbon monoxide

HKA_1518

0 6

0

12

0

18

0

24

0

300 36

Time [min] 0

Dust

0

2

5

5

0

7

5

10

0

12

5

15

0

Dust [mg/Nm3]

Organic C

0

2

5

5

0

7

5

10

0

12

5

15

0

OGC, NOx 

[ppm]

Nitrogen oxide

HKA_1518
Page 9 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.5 Investigatory heating tests with wood pellets at minimum heat output

 Number of test: HKA_1519

 Name of boiler: Pellet burner EVOTHERM P 100 ECO

 Nominal heat output: 105 kW

 Minimum Average Maximum

 value value value

Test conditions

 Start of test: 2007-06-21 08:50

 End of test: 2007-06-21 14:51

 Test duration: 06:01

 Ambient temperature: °C 26,7 29,4 31,8

 Outside temperature: °C 25,5 29,7 33,6

 Air pressure: mbar 986

Test fuel, heat input

 Test fuel Wood pellets 07_0599 

 Water content kg/kg 0,069

 Ash content kg/kg 0,003

 Carbon content kg/kg 0,471

 Hydrogen content kg/kg 0,058

 Oxygen content kg/kg 0,399

 Calorific value of anhydrous

 and ash-free substance MJ/kg 18,9

 Calorific value of test fuel MJ/kg 17,4

 Applied fuel quantity kg 39,8

 Hourly fuel quantity kg/h 6,6

 Fuel heat input kW 31,9

Heat output, efficiency

 Water circulation kg/h 1508,8 1512,6 1517,2

 Flow temperature °C 56,4 56,5 56,6

 Return temperature °C 73,1 73,6 73,9

 Temperature difference K 16,6 17,0 17,4

 Heat output in the

 boiler circuit kW 30,0

 Utilisation % 28,6

 Boiler efficiency % 94,2

Measured values flue gas measuring section

 Flue gas temperature °C 74,3 74,6 74,9

 Manometric pressure (draught) Pa 3,6 5,8 13,6

 Carbon dioxide % 6,8 8,7 10,4

 Carbon monoxide ppm 59,9 98,3 170,3

 Organic gaseous substances ppm 0,5 0,8 1,6

 Nitrogen monoxide ppm 41,4 50,4 60,7
Page 10 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.5.1 Emission measurements

Measurement results test: HKA_1519

(Calculation depending on CO2-measurement)

Suction start: hh:mm 08:52 09:50 10:50 11:50 12:50 13:50

Suction period: min 30 30 30 30 30 30

Suctioned gas sample: m3 0,264 0,267 0,320 0,310 0,325 0,319

Measured CO2-content: % 8,3 8,5 8,7 8,8 8,8 8,8

Calculated O2-content: % 12,3 12,2 11,9 11,8 11,8 11,8

Density of gas sample:

Dry gas kg/Nm3 1,33 1,33 1,33 1,33 1,33 1,33

Humid gas kg/Nm3 1,30 1,30 1,30 1,30 1,30 1,30

Water content g/Nm3 51,8 52,4 53,8 54,7 54,5 54,4

Flue gas mass flow:

Dry gas kg/kg 14,0 13,8 13,5 13,3 13,3 13,3

Velocity:

At sampling point m/s 0,86 0,85 0,83 0,81 0,82 0,82

At probe head m/s 0,35 0,35 0,42 0,39 0,42 0,41

Dust content:

separated mg 10,3 13,2 10,9 14,3 12,2 12,1

separated relating

to sample volume: mg/Nm3 46,4 60,1 41,5 57,7 46,4 47,5

2.5.2 Evaluation

 relating to relating to

 applied energy O2-content of

 10 % 13 %

 mg/MJ mg/Nm3 mg/Nm3

 Dust 29 61 45

 Carbon monoxide (CO) 72 150 109

 Organic

 gaseous substances (OGC) 1 2 1

 Nitrogen oxides (NOx) 62 130 94
Page 11 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.5.3 Output-related measurements

0 6

0

12

0

18

0

24

0

300 36

Time [min] 0

0

1

0

2

0

3

0

4

0

5

0

6

0

[kW]

Heat output

HKA_1519

0 6

0

12

0

18

0

24

0

30

0

36

Time [min] 0

0

5

0

100

150

200

250

300

[°C]

Flue gas temp.

Flow temp.

Return temp.

HKA_1519
Page 12 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.5.4 Flue gas composition

0 6

0

12

0

18

0

24

0

300 36

0 Time [min]

0

2

4

6

8

1

0

1

2

CO2 [%]

0

5

0

10

0

15

0

20

0

25

0

30

0

CO [ppm]

Carbon dioxide

Carbon monoxide

HKA_1519

0 6

0

12

0

18

0

24

0

30

0

36

Time [min] 0

Dust

0

2

5

5

0

7

5

10

0

12

5

15

0

Dust [mg/Nm3]

Organic C

0

2

5

5

0

7

5

100

125

150

OGC, NOx 

[ppm]

Nitrogen oxide

HKA_1519
Page 13 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.6 Surface losses

The heat loss through the boiler surface is determined using DIN 4702-2:1990 basing on radiation 

coefficients and arrangements of technical surfaces (according to Nusselt). Temperatures were 

measured at 58 points on the boiler surface during the test at nominal heat output. The measurement results are shown in the following table and the table of measurements in appendix 5.2:

Parameter Value Unit

Test number HKA_1518

Ambient temperature 29,9 °C

Flow temperature 74 °C

Flue gas temperature 105 °C

Heat output in the boiler circuit 105,5 kW

Radiation losses from boiler 0,48 kW

Percentage loss at nominal heat output 0,5 %

2.7 Water-side resistance of boiler

The water-side resistance for the flow rates was determined at nominal heat output which occurred

at temperature differences of 10 K and 20 K respectively.

Flow rate Temperature 

difference

Water temperature Differential pressure

[kg/h] [K] [°C] [mbar]

4500 20 18,5 5,0

9000 10 18,5 20,8
Page 14 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

2.8 Electrical power consumption

2.8.1 Average electrical power consumption at nominal heat output, minimum 

heat output, on standby position and ignition

Operating status Fuel

Meas. 

duration

Electrical 

energy

Average

electrical power 

consumption

Percentage of 

nominal heat 

output

[min] [Wh] [W] [%]

Nominal heat output

Wood pellets

366 1162 191 0,2

Minimum heat output 365 583 96 0,1

Ignition procedure 23 138 356

Standby position 60 9 9

2.8.2 Electrical power consumption of main loads

Load Power [W]

Draught fan 63

Secondary air fan 82

Drive motor – stoker screw 21

Drive motor – extraction screw 53

Drive motor – cleaning of heat exchanger 58

Ignition rod 1646

3 SUMMARY OF RESULTS

3.1 Heating tests

The tested EVOTHERM P 100 ECO pellet burner from the company Evotherm Heiztechnik Vertriebs GmbH, with a nominal heat output of 105,0 kW, was tested in the power range of 30,0 to 

105,0 kW using wood pellets compliant to ÖNORM M 7135:2000 having a diameter of 6 mm and 

a water content of 6,8 % and 6,9 %.

Since the boiler flue gas temperature is less than 160 K above room temperature at nominal heat 

output, the boiler manufacturer shall make recommendations in accordance with ÖNORM EN 303-

5:1999 regarding the flue installation in order to ensure sufficient draught and to prevent sooting 

up of the chimney and condensation. 
Page 15 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

The results of the emission measurements are as follows:

Nominal heat output Minimum heat output

Test fuel [-] Wood pellets

Water content [%] 6,8 6,9

Heat output [kW] 105,5 30,0

Fuel heat input [kW] 111,4 31,9

Flue gas mass flow [kg/h

]

201,5 93,1

Load [%] 100,5 28,6

Flue gas temperature

[°C] 104,0 74,6

Boiler efficiency [%] 94,8 94,2

Carbon dioxide [%] 14,7 8,7

[mg/MJ] 1) [mg/m3]

2) [mg/m3

]

3)

[mg/MJ]

1)

[mg/m3]

2)

[mg/m3]

3)

Dust 7 14 10 29 61 45

Carbon monoxide 32 66 48 72 150 109

Organic carbon <1 1 1 1 2 1

Nitrogen oxides 71 148 108 62 130 94

1) Emission values in mg/MJ (relating to applied energy), subject to legal requirements in Austria.

2) Emission values in mg/m3(relating to 10 % O2, 1013 mbar, dry flue gas), according to ÖNORM EN 303-

5:1999.

3) Emission values in mg/m3(relating to 13 % O2, 1013 mbar, dry flue gas), corresponding to various national and international requirements.

3.2 Function check of the temperature controller / safety temperature limiter on 

the boiler

The functional check of the temperature controller and the safety temperature limiter and monitor 

on the boiler was performed in accordance with section 5.13 of ÖNORM EN 303-5:1999. The requirements were fulfilled.

3.3 Function check to verify the rapid shutdown of the system

Since the tested pellet burner EVOTHERM P 100 ECO from the company Evotherm Heiztechnik 

Vertriebs GmbH is not equipped with a device to dissipate the residual heat as described in section 4.1.5.11.3 of ÖNORM EN 303-5:1999, the operating and fault conditions associated with a 

power outage and sudden loss of heat extraction were simulated in order to satisfy the definition of 

a burner system with a rapid shutdown facility.

During the course of the checks on the temperature controller, the safety temperature limiter and 

the rapid shutdown facility no dangerous operating conditions arose neither with the water system 

nor the burner.
Page 16 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

4 ASSESSMENT

Based on the test results, one can hereby confirm that the

Pellet burner EVOTHERM P 100 ECO

from

Evotherm Heiztechnik Vertriebs GmbH

fulfils the requirements governed by the agreements in Art. 15 a BV-G relating to “Protective 

measures for small burners” (1998) and “Saving energy” (1995).

For the

factual correctness:

Amtsdirektor Dipl.-HLFL-Ing.

Leopold Lasselsberger m.p.

For the

report and tests:

Ing.

Harald Baumgartner m.p.

Head of the

accredited test centre:

Hofrat Dipl.-Ing. Dr.

Johann Schrottmaier m.p.

Wieselburg, 21/11/2007

Translation: 31/07/2009
Page 17 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

5 APPENDIX

5.1 Legal requirements (for information only)

Legal requirements relating to small burner systems

for biogenous fuels in Austria

Agreement according to Art. 15 a B-VG concerning an amendment to the agreement according to Art. 15 a B-VG relating to protective measures for small burners (1998)

Small solid fuel burners must not exceed the following emission limits:

Solid fuel burners

Emission limits [mg/MJ]

CO NOx OGC Dust

Manually 

loaded

Biogenous fuels 1100 150*) 80 60

Fossil fuels 1100 100 80 60

Automatically 

loaded

Biogenous fuels 500**) 150*) 40 60

Fossil fuels 500 100 40 40

*) The NOx limit only applies to wood burners.

**) This limit value can be exceeded by 50% during partial load operation at 30% of nominal heat 

output.

Energy saving agreement according to Art. 15 a B-VG

The efficiency of small solid fuel burners should not fall below the following values:

Small burners used for solid fuel central heating:

Manually loaded

Up to 10 kW 73 %

> 10 to 200 kW (65,3 + 7,7 log Pn) %

> 200 kW 83 %

Automatically loaded

Up to 10 kW 76 %

> 10 to 200 kW (68,3 + 7,7 log Pn) %

> 200 kW 86 %

These federal requirements are implemented in local state law.
Page 18 of 18

Pellet burner EVOTHERM P 100 ECO

BLT reference number: 077/05

5.2 Surface temperature measuring points

K E S S E LT Y P E :

P O S IT IO N S B E S C H R E IB U N G T E M P . T E M P .

D E S B E D IE N U N G S G R IF F E S [ °C ] [ °C ]

T E M P . T E M P . T E M P . T E M P . T E M P . T E M P .

NR. F LÄ C H E [ °C ] NR. F LÄ C H E [ °C ] NR. F LÄ C H E [ °C ] NR. F LÄ C H E [ °C ] NR. F LÄ C H E [ °C ] NR. F LÄ C H E [ °C ]

1 A 1 43,2 2 1 E 1 34,3 4 1 I 1 36,5 6 1 M 1 6 1 Q 1 6 1 U 1

2 A 2 40,3 2 2 E 2 40,3 4 2 I 2 35,2 6 2 M 2 6 2 Q 2 6 2 U 2

3 A 3 42,1 2 3 E 3 32,6 4 3 I 3 32,2 6 3 M 3 6 3 Q 3 6 3 U 3

4 A 4 38,2 2 4 E 4 32,7 4 4 I 4 33,5 6 4 M 4 6 4 Q 4 6 4 U 4

5 A 5 2 5 E 5 33,0 4 5 I 5 31,9 6 5 M 5 6 5 Q 5 6 5 U 5

M ittelw ert 41,0 M ittelw ert 34,6 M ittelw ert 33,9 M ittelw ert M ittelw ert M ittelw ert

6 B 1 33,5 2 6 F 1 32,9 4 6 J 1 38,4 6 6 N 1 6 6 R 1 6 6 V 1

7 B 2 32,9 2 7 F 2 33,6 4 7 J 2 40,5 6 7 N 2 6 7 R 2 6 7 V 2

8 B 3 32,4 2 8 F 3 32,0 4 8 J 3 38,9 6 8 N 3 6 8 R 3 6 8 V 3

9 B 4 32,8 2 9 F 4 32,3 4 9 J 4 35,6 6 9 N 4 6 9 R 4 6 9 V 4

1 0 B 5 31,8 3 0 F 5 32,0 5 0 J 5 7 0 N 5 7 0 R 5 7 0 V 5

M ittelw ert 32,7 M ittelw ert 32,6 M ittelw ert 38,4 M ittelw ert M ittelw ert M ittelw ert

1 1 C 1 31,1 3 1 G 1 37,4 5 1 K 1 38,9 7 1 O 1 7 1 S 1 7 1 W 1

1 2 C 2 30,9 3 2 G 2 35,4 5 2 K 2 39,5 7 2 O 2 7 2 S 2 7 2 W 2

1 3 C 3 29,7 3 3 G 3 33,4 5 3 K 3 38,3 7 3 O 3 7 3 S 3 7 3 W 3

1 4 C 4 29,2 3 4 G 4 35,0 5 4 K 4 41,2 7 4 O 4 7 4 S 4 7 4 W 4

1 5 C 5 29,2 3 5 G 5 34,3 5 5 K 5 43,3 7 5 O 5 7 5 S 5 7 5 W 5

M ittelw ert 30,0 M ittelw ert 35,1 M ittelw ert 40,2 M ittelw ert M ittelw ert M ittelw ert

1 6 D 1 35,8 3 6 H 1 33,5 5 6 L 1 43,6 7 6 P 1 7 6 T 1 7 6 X 1

1 7 D 2 36,9 3 7 H 2 33,0 5 7 L 2 41,3 7 7 P 2 7 7 T 2 7 7 X 2

1 8 D 3 40,2 3 8 H 3 32,5 5 8 L 3 33,7 7 8 P 3 7 8 T 3 7 8 X 3

1 9 D 4 38,3 3 9 H 4 33,1 5 9 L 4 42,2 7 9 P 4 7 9 T 4 7 9 X 4

2 0 D 5 39,1 4 0 H 5 33,3 6 0 L 5 38,1 8 0 P 5 8 0 T 5 8 0 X 5

M ittelw ert 38,1 M ittelw ert 33,1 M ittelw ert 39,8 M ittelw ert M ittelw ert M ittelw ert

K E S S E LF A B R IK A T : E votherm H eiztechnik V ertriebs G m bH

M E S S P U N K T

B E Z .

 M E S S M E S S

M A T E R IA L

(M E / P O / K U )

P O S IT IO N S B E S C H R E IB U N G 

 D E S B E D IE N U N G S G R IF F E S

Z 1

Z 2 Z 4

Z 3

 M E S S M E S S M E S S . M E S S

B E Z .

M A T E R IA L M E S S P U N K T

(M E / P O / K U )

P elletsfeuerung E votherm P 100 E C O

L1...L5 Floor area