Sigma Holzgas Manual And Installation

Sigma Holzgas 18-60k

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Manual and Installation book

of boiler

CHT Heizkessel GmbH

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

[e-mail] [e-mail]

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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) Using and Service - 8 -

5) Control -11-

6) System -14-

7) Parts -17-

8) Boiler installation systems -19-

www.cichewicz.com

With us heating 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 thermo­chemical 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:

dm3

145 L

165 L 180 L

Max. Working Pressure:

bar 2

Min. Inlet Temp.

o

C 65

Max. Outlet temp.

o

C 85

Flue gases Temperature:

o

C >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

9 Wood with humidity up to 25%
9 Chunks 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.