HDG Compact 100HDG Compact 150HDG Compact 200

Wood chip, shaving and pellet firing

Heating with wood convenient

and innovative

Heating systems for wood

Products fromBavaria

Germany

DISTRIBUTED BY DISTRIBUTED BYDISTRIBUTED BY

DISTRIBUTED BY

DISTRIBUTED BY

In harmony with nature

Photosynthesis

Burning

Co2

Wood chips and shavingsas an energy store

Wood

Forest

Heating with wood = utilisation of localenergy reserves

The use of wood reduces our dependence on

heating oil and natural gas, safeguards local

jobs in the surrounding region and offers an

additional source of income for land and

forest managers.

Heating with wood is a cost-controlling

alternative, as the cost of heating with wood

chip/shaving systems is largely independent

of the price of fossil fuels.

Compared to oil-burning heating systems, the

amount of sulphur dioxide and hydrocarbon

emissions are lower.

There are no risks associated with

transporting and storing wood.

The ecological result is a virtually closed Co2

cycle.

Grant Aid:Information about grant aid programs which are continuously

changing may be found at:

www.hdg-bavaria.com

2

Closed Co2 cycle

The burning of wood releases the same amount of Co2 back

into the environment as was previously absorbed and bound

in the wood through photosynthesis during the life of the

tree.

The burning of fossil fuels, such as heating oil and natural

gas, has a much greater impact. When these fuels are

burned, Co2 which has been absorbed and stored over the

course of millions of years is released back into the

atmosphere again. This type of Co2, which originates from

past geological eras, is linked to the intensification of the

greenhouse effect and leads to uncontrollable changes in

our climate.

HDG wood boilers are manufactured in Bavaria

(Germany), which is characterised by hills,

forests and meadows.

Perfection in planning

We plan the optimum solutionfor you

At no additional cost, we create

plans for our customers which are

tailored to their individual needs.

We determine exact requirements

and gather information about the

layout of buildings directly on-

site.

Based on the data obtained, we

will create a CAD installation plan

which graphically illustrates the

best installation option for the

home or adjacent building.

3

Example plan 2Example plan 1

HDG Compact 100/150/200

The automatic ash removal system – a clean concept

The removal of ashes from the

combustion chamber facilitates low-

maintenance operation of the firing

system, even for high-ash fuels.

Combustion residues are deposited into

the ash pan by means of the moving

stepped grate. From there, they are

conveyed with an ash worm conveyor

into a separate ash container which has

a capacity of 60 litres.

The automatic removal of ash from the

fly chamber (60 litre capacity), which is

a standard feature, significantly

extends cleaning intervals in the area

of the upright, self-cleaning heat

exchanger surfaces.

For wood chips, pellets and shavings (moisture content up to 65%)

Consistent output due to state-of-the-art combustion technology which employs an air-cooled, moving stepped grate (patented)

Infinitely adjustable, nominal thermal output

Unique combustion control by means of oxygen sensor and hot gas sensor for optimal efficiency (> 90%)

Automatic ignition with hot air blowers

User-friendly ash removal system

Patented rotary feeder for burn-back protection

Meets most European applicable safety standards

Direct fuel insertion onto the stepped grate with minimal expenditure ofenergy

Option to connect an oil burner to the boiler if necessary

Cleaning doorAsh removal worm conveyorsMoving stepped grate with

replaceable grate elements

Stoker worm

Rotary feeder

Geared motor for

delivery unitHot combustion

chamber

Geared motor for

feeding system

Safety heat exchanger Cleaning access Oxygen sensorHot gas temperature sensor

Sectional view

HDG Compact 100

4

Stepped grate technology

The moving stepped grate – your guarantee for consistent performance

The use of a moving, air-cooled stepped grate in the firing chamber for this

output range is truly unique. Air for combustion (primary air) is fed in

underneath the fuel grate. Routing air in this way effectively cools the

grate elements and preheats combustion air at the same time, which has a

positive effect on combustion.

Stepped grate technology ensures that optimum performance is maintained

even when the proportion of non-combustible material is increased. The

material moves through different temperature zones on the grate. The fuel

is thereby dried, degassed and finally burned in its entirety. The geometric

design of the hot combustion chamber facilitates an above average

retention time and turbulation of the combustion gases at high

temperatures.

The control system for combustion and output enables the system to adapt

to different types of fuel. Primary air, secondary air and material quantity

are automatically optimised. This makes it possible to regulate the system’s

nominal thermal output between 30% and 100%.

Sectional view of stepped grate system

HDG is the first manufacturer to successfully employ the most proven feed grate

technology used in commercial firing systems in residential boiler systems at an

affordable price.

The stepped grate concept ensures absolute low-emission combustion with a

high degree of efficiency.

NATIONAL AWARDFOR OUTSTANDING

INNOVATIONSIN CRAFT

Patent for stepped grate issued

by European Patent Office

(Patent no. 1004822)

HDG Compact systems meet applicable

standards (e.g. DIN EN 303-5, DIN

4751-2) and have been safety tested

by TÜV in accordance with TRD414.

The innovative developments at HDG

have resulted in many prizes and

awards. This recognition also serves as

an incentive for HDG to conduct further

intensive research and development

with regard to innovative and practical

wood heating systems.

HDG products are regularly tested in

independent laboratories to ensure

they meet both statutory and

voluntary quality requirements. They

conform to the guidelines for

combustion technology and safety

engineering.

85

Inspection window for the combustion chamber

Combustion-

air assembly

cover

Combustion

air fan

Primary air

servo motor

Ignition

fan

Fill level

indicator

Secondary

air

servo motor

Technical data

HHDDGG CCoommppaacctt 110000 HHDDGG CCoommppaacctt 115500 HHDDGG CCoommppaacctt 220000

Nominal thermal output 100 kW 150 kW 200 kW

Output range 30 - 100 kW 45 - 150 kW 60 - 200 kW

Exhaust temperature 100 - 240 °C 100 - 240 °C 100 - 240 °C

Exhaust mass flow 74.6 g/s 111.9 g/s 147.6 g/s

Water capacity 210 l 450 l 450 l

Operating pressure 3 bar 3 bar 3 bar

Flue druaght 15 PA 0.06"wg 15 PA 0.06"wg 15 PA 0.06"wg

Perm. supply temperature 95 °C 95 °C 95 °C

Weight 1420 kg 2050 kg 2080 kg

Sectional view: Door assembly with functional components

Technical data for the HDG Compact 150/200

1098

2200

2500

Ø30

018

0

491,

5

1250 15

85 1930

Technical data for the HDG Compact 100

1750

880

18002100

452

464

Ø25

0

1250 14

40 1585

2120

780

250

250

6

HDG control technology –

an innovative advancement

For wood chip boilers, system control and output regulation are just

as important as combustion technology. For this reason, HDG

employs cutting edge technology which is both reliable and easy to

operate.

The user-friendly control panel on the PLC controller displays the

current operating status and makes it possible to call up all necessary

operating parameters at any time.

The combustion control system determines the required amount of

secondary air via the oxygen sensor and optimises the combustion

parameters accordingly (for HDG Compact 100/150/200). Data from

the hot gas temperature sensor is used to meter-out the optimal

amount of fuel.

The integrated output controller uses sensors in the supply and return

flows to enable infinite adjustment of output between 30% and

100%. The fuel type can be input to provide even more intensive and

direct control over combustion.

All components of the system are electronically controlled by a PLC

controller inside the control cabinet. Current operating data from the

combustion system is indicated on an illuminated display.

The design is compliant with the requirements of DIN EN 60335 and

DIN EN 50156. The control cabinet can be expanded to accommodate

different system requirements.

Our unique combustion and output control system guarantees the

lowest possible emission levels and the highest degree of efficiency,

which has been confirmed by TÜV of southern Germany.

The HDG control cabinet – optimum system control

Software and hardware upgrades for the control

cabinet are available on request.

The clearly laid out display is very simple to

operate.

Oxygen sensor (for HDG Compact 100/150/200)

87

In conjunction with a water extinguisher unit, feeding via our patented

rotary feeder with stoker worm guarantees you the utmost in operating

safety (IBS tested).

The combustion chamber is hermetically decoupled from the silo and

transport unit by means of the rotary feeder (patented back-burning

protection).

Another inherent advantage is the capability to reduce the size of larger

pieces of wood, thus creating the ideal conditions for combustion. This

is beneficial for a continuous combustion process.

An automatic reversing mechanism ensures as far as possible continuous

operation in the unlikely event of jamming.

8

HDG feeding systems – a safe solution

HDG feeding system –

designed for safety

Overfill protection

Delivery worm

Rotary feeder

Stoker worm

(8 mm thick)

EExxppllaannaattiioonnss aanndd aabbbbrreevviiaattiioonnss::

1 Srm = fill unit, equates to 1m3 poured wood

loose

1 Rm = stacked cubic metre (stere)

1 Fm = 1 solid cubic metre (without gaps)

w = water content (w), relative moisture

u = wood moisture (u), atro moisture

(= absolutely dry)

WWoooodd cchhiipp ggrraaddeess ((aaccccoorrddiinngg ttoo ssiizzee))

G30 finely cut less than 3cm

G50 medium cut 3-5cm

G100 coarsely cut 5-10cm

11.. WWaatteerr ccoonntteenntt aanndd wwoooodd mmooiissttuurree

Water content 50% 40% 30% 20%

Wood moisture 100% 65% 45% 25%

TThhee ssppeecciiffiiccaattiioonnss aarree bbaasseedd oonn ssoofftt wwoooodd wwiitthh

GG 3300 aanndd ww 3300

22.. CCoonnvveerrssiioonn ffaaccttoorrss

1 Srm wood chips = approx. 65-75L heating oil*

1 Srm wood chips = bulk density 210-250 kg/m3

1 kg wood chips = approx. 3.4 kWh

1 Rm wood (stere) = approx. 2.0 Srm wood chips

1 litre heating oil* = 10 kWh/litre

Specific weights of heating oil = 840g/litre

1 litre of heating oil generates 2.676 kg CO2

WWoooodd cchhiipp ggrraaddeess ((aaccccoorrddiinngg ttoo wwaatteerr ccoonntteenntt))

w 20 air-dried w < 20%

w 30 stable in storage w 20-30%

w 35 limited stability in storage w 30-35%

w 40 moist w 35-40%

w 50 freshly cut w 40-50%

* 35 second heating oil

IInntteerreessttiinngg ffaaccttss –– wwoooodd cchhiippss aass aa ffuueell ssoouurrccee

Sources: Energy information centre, Stuttgart;

Wood sales promotion fund, Bonn

Sectional view of the completedelivery unit with the patentedrotary feeder and the stoker worm

Spring steel blade delivery(bunker diameter up to 4.5 metres)

Hinged arm delivery (bunkerdiameter of 3 - 6 metres)

HDG delivery systems – solid from the ground up

9

Based on the layout of the building, size of the bunker, boiler capacity and fuel type, we offer custom-tailored delivery

systems, from spring steel blade and hinged arm delivery to silo and walking floor delivery. On request, we will be

happy to send you more specific information about our silo and walking floor delivery systems.

HDG delivery systems are designed to be robust and durable, and they offer a hassle-free means of reliably supplying

your system with fuel.

The spring steel blade feeding system transports and meters fuel, from wood shavings to G 50-size wood chips.

The special arrangement of the worm shaft spiral ensures the uniform delivery of fuel.

The delivery worm can be manually reversed if needed (with agitator disengaged).

The specially developed torque support on the drivemotor protects the gearbox from being overloaded and ensures an

exceptable noise level.

A heavy duty version is available for the delivery of pressed briquettes and pure hardwood chips.

HDG delivery systems –

for all individual requirements

Spring steel arms

tapered feed screw

Arrangement of the worm

shaft

Torque support

Prestressed hinged arms

TThheerrmmaall vvaalluuee iinn kkWWhh//kkgg aaccccoorrddiinngg ttoo wwaatteerr ccoonntteennttThermal value in

kWh/kg – kWh/kgf

66..00

55..00

44..00

33..00

22..00

11..00

00..001100 1155 2200 2255 3300 3355 4400 4455 5500 5555

For low-emission combustion, it is important to only use

“good” wood, i.e. not waste wood or dirty, decayed, rotten or

very wet wood. Also, the proportion of bark should not be too

high, as this causes an increased proportion of ash. Untreated

wood generally produces a relatively minimal amount of ash.

Source: Bavarian regional office for agriculture and forestry

Water content in %

6600 6655

IIddeeaall

10

Quality you can trust.

Wood processing plant heating offices

and production area (HDG Compact 100

with walking floor delivery)

Hotel, large guest house

(HDG Compact 49)

Organic farm and country restaurant.

(HDG Compact 150)

Stately home (HDG Compact 200)

Eble Clock Park, world’s largest cuckoo

clock, Triberg/Black Forest

(HDG Vorofenanlage)

Modern Church (HDG Compact 49)Industrial building heating production

and office area`s (HDG Compact 200)

English Garden, Building

(HDG Compact 200)

(HDG Compact 49) heating a large farm

building

Manufactured in Bavaria Germany –high quality

11

HDG Bavaria GmbH is aninnovative, Bavarian enterprisewhich stands for convenient,innovative and environmentally-friendly heating with wood.

It is our business to make sure that

your heating system works just as it is

supposed to, ... while you are busy

taking care of the important things in

life!

Competent employees plan and fabricate

your heating system with the highest

HDG manufactures all of its wood boilers

at its headquarters in Massing/

Bavaria Germany.

quality workmanship and perfection.

During our plant tours and heating pre-

sentations, we provide customers and

interested parties with information on

the subject of “heating with wood.” And

yes, of course, we heat our own facilities

with wood.

We have been building wood

firing systems for 40 years in the

lower Bavarian town of Massing

Germany. Our many years of

experience and commitment to

continuous research and

development provide a stable

foundation for new and

innovative products.

Your local HDG distributor:

HDG wood chip, shaving and pellet boilers

HDG log wood boiler

HDG pellet heating systems

HDG wood chip, shaving and pellet fired boilers 12 to 200 kW

HDG log wood boiler from 12 to 250 kW

HDG pellet heating systemsfrom 4.5 to 25 kW

www.hdg-bavaria.com

HDG heating systems for wood

HDG Bavaria GmbHHeating systems for woodSiemensstraße 22D-84323 MassingPhone +49(0)8724/897-0Fax +49(0)8724/8159info@hdg-bavaria.comwww.hdg-bavaria.com

Issued 09/2007 Subject to technical changes and correctionsLI037

Heating systems for wood

GlasMullins MillKells Co. KilkennyIreland Tel. +353 (0)56 7728255or freephone1800 ENERGY (363749) info@glas.ie www.glas.ie

HDG_Prosp_Stueck_EN_Lay_070905 1 12.09.2007 17:10:11 Uhr