Sigma Holzgas Sicherheitsleitfaden

Sigma Holzgas 18-60k

Manual and Installation book

of boile

CHT Heizkessel GmbH

Gartenfelder Strasse 29-37, 13599 Berlin, Tel.:+ 49 30 – 30 64 17 29 Fax: + 49 30 – 30 64 17 27

[email protected] service@cht-heizkessel.de

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Manual and Installation book

of boiler

Table of contents

1) Short description - 3 -

2) Technical data - 4 -

3)Fuel -8-

4)UsingandService -8-

5)Control -11-

6)System -14-

7)Parts -17-

8) Boiler installation systems -19-

www.cichewicz.com

With us heatin

makes economies!

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1) Short description

1.1) Gasification technology

The wood gas (ger. holzgas) comes in the process of gasifing of the wood. This

is the mixture of flammable gases: the oxide of carbon, hydrogen and methane,

and also incombustible -- nitrogen, the dioxide of carbon, water steam. The

composition of the gas depends on many factors as: from current temperature

in the hearth of the gas generator, the moisture of the loaded fuel and other.

The gasifing of solid fuels is technology counting above 200 years. On the

beginning XIX w. it was used so-called urban gas to the supply of cookers,

street lamp and to industrial aims. It was produced from the carbon then.

Generally -- the artificially formed gas from the gasifing of the solid fuel is called

the generator gas.

Technology this consists in the working on the solid fuel with series of thermo-

chemical reactions, the flammable gas becomes in the result of them. Gasifing

just defines oneself this cycle of conversions. This process holds in the device

called gas-generator.

The type- matter of the wood gas can look as follows:

oxide of the carbon of CO 19%

hydrogen H2 18%

methane CH4 1,25%

dioxide of the carbon 12%

steam water H2O 2,50%

nitrogen N2 the rest

From these exchanged, only three first gases (coloured) are flammable.

Remaining do not burn and make up only unnecessary ballast, in the principle

they thin the gas and reduce its fuel value. From this regard it would be good to

remove them. However nitrogen from the wood gas can’t be removed (the basic

component of air, in which we gasify the wood), then can the water steam

relatively easily humid from the gas in the cooler. The content of the dioxide of

the carbon depends first of all from the temperature in the gas-generator (if

higher, the more CO and less CO2).

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1.2) Boiler

Boiler of type Westfalia Holzgas on first throw of the uninitiated eye does not

differ from the usual boiler on the wood. It has hearth, loading chamber and

ash-pan. The difference of working is however considerable -- it burns in it not

from the bottom to the top, but inversely. There is the loading chamber at the

top and the transformation of the wood follows in the wood gas in this chamber.

There is the nozzle below the chamber in which burning the wood gas mixed

previously with the air, which flows in from outside, follows. This element is

made from the heat-proof material. There is the ash-pan, in which burning down

the mixture of the wood gas with the air follows, under the nozzle. The boiler on

the wood gas from the back possesses accompanying flue gas to the chimney,

in this place the exchanger of warmth allowing to the heating of water from hot

flue gas is assembled.

The boilers of type Westfalia Holzgas are designed to heating up water in c. h.

installations which computational temperature of supply do not cross 85 °C.

They can be used in c. h. installations of flat, council or productive buildings,

which users require automatic feeding of fuel. Boilers can be assembled both in

modern and conventional heating installations.

Boiler steering has the possibility of pump regulation also loading storage tank.

Boiler of type Westfalia Holzgas utilizes wood in gasification process using

energy contained in wood with efficiency three times higher than traditional

boilers. Smoke and other emissions are cut to a very low level, making our

boilers nature friendly.

All works relating equipments of boiler room, way of installing boiler as

well as his exploitation must be realized compatible with valid norms and

regulations.

2) Technical data

Type Unit Sigma 20 Sigma 30 Sigma 50

Power Range (Output): kW 14,9-24 25-32 45-59

Fuel: Wood (max. humidity 20%, max 50cm long)

Efficiency: % > 89,90

Boiler Water Volume: dm3145 L 165 L 180 L

Max. Working Pressure: bar 2

Min. Inlet Temp. oC 65

Max. Outlet temp. oC 85

Flue gases Temperature: oC >160 >160 >160

Noise: dB 52 -65dB (A)

Recommended Chimney

Underpressure Pa 20-25

CO2 emission mg/m³ 4800 4820 4950

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Recommended Chimney's

Intersection mm 160 160 180

Inlet/Outlet Diameter “ 1,5 1,5 2

Bottom Outlet Diameter “ 1/2 1/2 1/2

Weight: kg 490 540 600

Power Consumption W 82 82 90

2.1) Outtake Fan WC170

2.1.1) Technical data

Power supply -230V, 50Hz Temp. of surroundings 0=40°C

Power consumption 82W Temp. of fumes do 350°C

Expense of air 38-UM /11 Loudness 65dB

Number of gears 1 Class of tightness IP44

Rotational speed 2400obr/min Class of isolation F

Condenser of the engine 3µF/450V Mass 2,2kg

Kind of the work continuous Supply wire 0,6m

External dimensions 186x174x174mm (lg. x wid. x h.)

2.1.2) Wiring diagram

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2.1.3) Placing in mounting hole

•Unscrew mounting plate

•Mount fan Wheel, plate and the engine together.

•Screw the plate with mounted fan into the mounting hole.

2.2) Structure of the boiler:

The structure of boiler was worked out on basics of long term researching with

idea about high thermal comfort, exploational and with care about ecology. The

boiler has the three pass structure in shape of vertical and horizontal convective

channels, making the surface of heat exchange. The combustion space is partly

tiled with fire-clay which attends as catalyst of combustion process. The body of

boiler is made from certified steels and welded in cover of argon. Westfalia

Holzgas is equipped in ceramic burner nozzle and ceramic deflectors.

2.3) Special features of Sigma Holzgas:

•Low exploitation cost

•Easy and simple service

•Long wood up to 50cm long

•Efficiency > 90 %

•Fuel loadings - once for 8 -12 hours

•Boiler power modulation 70-100 %

•Small ash quantity

•Electronic controller with

temperature sensor built in

•Nature friendly

•Produced of certify steel

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2.4) Dimensions of Sigma Holzgas:

mm Sigma 20 Sigma 30 Sigma 50

A 1510 1510 1510

B 725 825 825

C 840 840 960

D 1030 1030 1150

a 1,½" 1,½" 2 “

b 1,½" 1½" 2 “

c ½" ½" ½"

d ø160 ø160 Ø200

2.5) Schema of Westfalia Holzgas:

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3) Fuel

9Wood with humidity up to 25%

9Chunks dimensions 30-50cm

The wood has to be dry! The efficiency of the boiler falls together with growing

moisture of the wood, settling tartly substances increases and the life of the

boiler drops. Power and proper functioning of the boiler are guaranteed near

maximum moisture the wood to 20%.

The energetic properties of the most popular species of the wood:

Wood type Thermal efficiency per 1 kg

kcal MJ kWh

Spruce 3900 16,25 4,5

Birch 3750 15,50 4,3

Oak 3600 15,10 4,2

Beech 3450 14,40 4,0

4) Using and Service

4.1) Assembly:

1. Fit the ceramic burner nozzle to the boiler via the rectangular hole located

inside of boiler.

2. Mount the ceramic deflectors into their place inside the lower chamber.

1. 2.

4.2) Burning

Put wood-chips or sawdust as base, then put inside little pieces of wood. At the

top put chunks of wood and set the fire with half-open ash doors and full open

shutter.

After firing close fire-doors and turn on work and adjust required temperature on

regulator.

The attemperation is done with help of the mechanical regulator (shutter) of

fireplace and with help of the electronic automatics mastering the work of fan.

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4.3) Setting air inlets

1. 2. 3.

Upper shutter is responsible for main air inlet.

Lower shutter is responsible for secondary air inlet.

The position of the shutter of

regulating opening in the

front plate of the casing

during exploitation:

4.4) Cleaning the burner.

When is cooled down completely it is ready for cleaning. Take the burner

nozzle of the assembly hole, remove the deflectors from the lower chamber.

The parts can now be worked with for cleaning.

To ensure best boiler operation, cleaning should be done frequently. This

guarantees the best fuel efficiency. The better the boiler is set up the

longer the intervals between cleaning.

Shutter position Power Burning time

(in hours)

Max. open Nominal (full) 2

Open on 1/2 70% nominal 3

Closed Minimum 5

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4.4.1) Clearing the deflectors and burner nozzle…

•Remove the ash and any cinders from the unit.

•Remove any wood left in the unit.

•Remove the tight rope.

•Take out the ceramic nozzle.

•Remove the ceramic deflectors from the lower chamber.

•Brush them gently with soft brush.

•Vacuum the left ash, do not touch the ceramic elements with vacuum head.

4.4.2) clearing the boiler…

The boiler should be emptied

from ash and all of the surfaces

should be brushed in order to

remove soot particles.

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