KOB KOB PYROMAT ECO SERIES User manual

Wood heating systems from 35 to 170 kW

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Why heat with wood?
Sustainable
When wood is "harvested" from sustainable
forestry, it is a renewable and environmentally
friendly source of energy and an important
part of sustainable resource management.
CO2neutral
When wood is burned, only as much CO2is
released as the trees have absorbed during
the course of their life. That's why heating
with wood is CO2neutral.
Economical
Wood, as an indigenous fuel, is also very
aordable and not subject to wide price
fluctuations.
The rising costs of fossil fuel and increasing environmental awareness have resulted in an
ever-rising demand for renewable forms of energy. Advanced wood heating systems are
an environmentally responsible and economical alternative (or addition) to conventional
fossil fuel heating systems.
Top technology and reliability
Advanced biomass systems operate fully
automatically and are equipped with control
and safety devices for a reliable, ecient and
safe operation.
Home-grown and independent
Wood is a home-grown product, harvested
using a minimum amount of energy and it
contributes to regional economies.

Wood storage
Not only is the combustion of moist wood
uneconomical, it can also lead to high
emissions plus tar deposits inside the
chimney stack on account of low combustion
temperatures. Wood oers its highest
calorific value after being dried for several
years under an open cover.
Here are a few tips:
nSplit round logs with a diameter of 10 cm
or more
nStack logs in a ventilated and preferably
sunny spot underneath a canopy
nIf possible, stack logs with generous air
gaps to enable flowing air to absorb the
dissipating moisture
nStack logs on a support timber so moist air
can escape downwards
nNever store freshly cut wood in a cellar,
as air and sunshine are required for drying
However, dry wood can be stored in
ventilated cellars.
Important facts
regarding wood and
pellets
What you should know
Köb wood heating systems are oered for diverse forms of wood fuel.
See below for information about their storage and purchase.
Pellet properties
100 % natural waste wood is used to produce
pellets compliant with DIN-Plus or ÖNorm.
This raw material is waste matter created
by the wood processing industry in large
volumes through planing or sawing.
Fine grained waste wood is compressed
under high pressure and formed into pellets,
i.e. pressed into a cylindrical shape. The fuel
is stored and transported in perfectly dry
conditions. Absolutely dry storage conditions
must also be ensured by the system user.
Perfect and eective combustion can only
be ensured under these conditions.
Pellets are oered in packs or loose in bulk.
In their loose form, pellets are transported by
silo tanker and pumped into the storage room
via a hose system.
If an oil heating system is to be completely
replaced by a new pellet heating system, the
room in the cellar that was previously used to
store fuel oil is ideally suited for this purpose.

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Questions regarding wood boilers
Köb Holzheizsysteme is aware of its responsibility for the sustained protection of the
environment. Its company philosophy and products focus on this.
Can anyone heat with a wood boiler?
The advanced wood boilers from Köb are
so convenient to use that they can supply
practically any detached house and apartment
building with heat. One important requirement
is a dry storage room, as the residual moisture
in the wood is one of the crucial factors
influencing combustion quality. Conversions,
for example, of the chimney stack, are
generally not required. Wood heating systems
from Köb are also a perfect companion for
oil and gas heating systems. You can then
determine for yourself when to use which
fuel.
What is better – heating with logs or
pellets?
Logs are an ideal choice for those who can
acquire the fuel themselves, e.g. from local
forestry operations. The wood needs to be
dried correctly, in other words stored until
it has the lowest possible residual moisture
content. In addition, a heating water buer
cylinder is required to ensure a continuous
heat supply.
Pellets are created under pressure from
sawdust and oer a high calorific value
because of their low residual moisture
content. Pellets are also easy to deliver and
store. Dispensing and supply to the wood
heating system is automatic and convenient.
Where can I obtain wood fuel?
Wood fuel, primarily pellets, are today
a standard fuel for most fuel merchants.
As with fuel oil, they are "pumped" into the
storage room. This is accomplished quickly
and without major eort. Many sawmills
and wood processing enterprises also oer
pellets. You can obtain logs at favourable
prices from forestry operators or farmers with
forestry enterprises attached.
Wood briquettes
Wood briquettes are made from
waste wood, compressed to reduce
the proportion of fine particles.
The size and density of the wood
briquettes should be matched to
the form of charging employed.
Logs
Logs are pieces of wood (hard and
soft wood) from forestry operations
and landscape gardening.
Waste wood
Waste wood is the most diverse
in both consistency and size of
individual pieces; it is comprised
of both hard and soft wood.
Woodchips
Woodchips are pieces of chipped
natural wood, with and without
bark.
Pellets
Pellets are the most compact form
of wood energy and oer a high
calorific value. Ensure that the
pellets conform to standard branded
quality (e.g. DIN-Plus or ÖNORM).

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Wood heating systems from 35 to 170 kW
PYROMAT ECO
PYROMAT DYN
Wood boilers for logs, wood briquettes, waste wood, woodchips and pellets.
Pyromat ECO
Log boiler for manual
charging with logs, wood
briquettes and waste wood,
either loose or in pieces.
Hopper width: 550 mm
40 to 95 kW
Page 8
Pyromat DYN
Wood boiler for manual
charging with logs and
pieces of waste wood, or
automatic charging with
pellets, woodchips, wood
briquettes or loose waste
wood.
35 to 100 kW
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The Pyromat ECO oers the greatest
operating convenience when heating
with logs thanks to its large charging chute.
Eciency of up to 92 % and regulated
utilisation of residual heat enable low fuel
consumption. Ten models oer the right
solution for any application: The rated output
of the Pyromat ECO covers from 40 to
170 kW. From a rated output of 85 kW and
higher, this log boiler is also available as a
boiler for 1 m long logs.
The Pyromat DYN can convert many forms
of wood fuel into heating energy. It is suitable
for manual charging with logs and pieces of
waste wood, or for automatic charging with
pellets, woodchips, wood briquettes and
loose waste wood.
Pyromat ECO
Log boiler for manual
charging with logs, wood
briquettes and waste wood,
either loose or in pieces.
Hopper width: 1080 mm
85 to 170 kW
Page 8

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Log boiler Pyromat ECO
The Pyromat ECO log boiler has already been
proven in thousands of applications. Charging
from the top oers easy handling; control via
the Lambda probe guarantees low emissions,
and the integral heat management system
ensures maximum convenience.
Clean and ecient combustion
The microprocessor-controlled Ecotronic
captures all details relevant for the operation
and regulates the amount of heat and its
demand. As a result, the boiler system is
monitored constantly in all operating phases,
from heat-up, operation under load, and
from recharging right up to burnout, and it is
held – via its motorised air dampers – within
its optimum operating range. This safeguards
clean and ecient combustion.
The Pyromat ECO was developed specifically for the combustion of logs and represents
state of the art combustion technology.
PYROMAT ECO
Large hopper for combustion lasting
several days
The Pyromat ECO oers the greatest
operating convenience when heating with
logs thanks to its large charging chute. Log
boilers in the output range 40 to 95 kW can
operate with logs of 0.5 m length; in the
range 85 to 170 kW the hopper width
increases to 1080 mm, ensuring convenient
charging, even with logs of 1 m length.
With oil burner connection
The Pyromat ECO is approved as an oil boiler
compliant with EN standard; the necessary
connections have already been prepared.
Fitting an oil burner may, for example, help
to bridge holiday times when manual charging
with logs is not feasible.
The Pyromat ECO is particularly suitable for
the combustion of logs, wood briquettes and
waste wood, either loose or in pieces.
Pyromat ECO
1Easily accessible charge door for charging
the wood boiler from above
2Ecotronic control unit
3Hopper tapering downwards
4Degasification zone with cast grate and
fireclay bed
5Large, easily accessible ash box for the
grate ash
6Combustion chamber made from high
temperature-resistant refractory concrete
7Ash container below the heat exchanger
8Induced draught fan with Lambda probe
and temperature sensor
9Vertical tubular heat exchanger
10 Upper cleaning cover
11 Boiler assembly as part of the standard
delivery (return temperature raising) with
boiler circuit pump, boiler control valve,
flow and return temperature sensor
Pyromat ECO log boiler

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Take advantage of these benefits:
nLog boiler for logs of 0.5 and 1 m length with high operating convenience
through charging from the top
nFor the following fuels: logs, wood briquettes and waste wood, either loose or
in pieces
nLarge hopper capacity (185 to 500 litres) for combustion lasting several days
nFully wired
nProven induced draught fan for quiet operation and a long service life
nNo draught controller or limiter required
nConstantly regulating air damper with heat-up and burnout optimisation
nAccurate temperature stratification of a DHW cylinder by means of a cylinder
heating control valve – no possible irritation of the cylinder stratification through
the return (option)
nBoiler assembly (return temperature raising facility) fully fitted
nNot sensitive to foreign bodies (nails, screws, etc.)
nIntegral buer heating management
nLambda probe control
Specification
nRated output range: 40 to 170 kW
Log boiler (0.5 m logs) (hopper width: 550 mm), 6 types from 40 to 95 kW
Log boiler (1 m logs) (hopper width: 1080 mm), 4 types from 85 to 170 kW
nEciency up to 92 %
nPermissible flow temperature up to 100 °C
nPermissible operating pressure 3 bar
nCE designation according to current Directive
For specification see page 18
Pyromat ECO log boiler – manual
charging from the top

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Wood boiler Pyromat DYN
The Pyromat DYN is suitable for manual charging with logs and pieces of waste wood, or
for automatic charging with pellets, woodchips, wood briquettes or loose waste wood.
PYROMAT DYN
The high eciency of the Pyromat DYN is
the result of a long burnout path, the optimum
heat transfer through self-cleaning boiler
passes and the utilisation of residual heat
in the ash. In standard operation, the ash
is automatically removed from the main
combustion chamber into the front
combustion chamber, where it remains
until all incandescence has ceased.
Large hopper for combustion lasting
several days
Large hopper above the combustion chamber
for a convenient operation with logs lasting
several days. A simple push of a button is
enough to change over to log combustion
(patented air damper function).
Pyromat DYN
1Ecotronic control unit
2Front combustion chamber charged from
the top
3Automatic ignition fan
4Charge screw and degasification grate with
primary air
5Combustion chamber door with primary air
damper
6Large ash chamber with utilisation of
residual heat
7Combustion chamber made from heat-
resistant refractory concrete
8Automatic ash removal from the
combustion chamber
9Drive for automatic ash removal and
cleaning
10 Secondary combustion chamber
(secondary air via combustion chamber
door)
11 Variable speed flue gas fan with Lambda
probe and temperature sensor
12 Tubular heat exchanger with automatic
cleaning
13 Boiler assembly as part of the standard
delivery (return temperature raising facility)
with boiler circuit pump, boiler control
valve, flow and return temperature sensor
Pyromat DYN
35 to 100 kW
The Pyromat DYN can convert many forms of
wood fuel into heating energy. An ignition fan
system automatically ignites the charge when
the wood boiler is equipped with automatic
charging. Combined with a DHW cylinder,
this permits a perfect low load control (DHW
mode in summer).
Self cleaning heat exchanger surfaces
The vertical heat exchanger surfaces are
permanently cleaned through motorised coil
springs. The drive mechanism sits below
inside the protected cool gas flow. The
springs can be removed easily for the annual
cleaning by the flue gas inspector/chimney
sweep.

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Take advantage of these benefits
nWood boiler, suitable for manual charging with logs and pieces of waste wood,
or automatic charging with pellets, woodchips, wood briquettes or loose waste
wood
nBoiler assembly (return temperature raising facility) fully fitted
nFully wired
nProven flue gas fan for quiet operation and a long service life
nConstantly regulating air dampers with heat-up and burnout optimisation
nAccurate temperature stratification of a DHW cylinder by means of a cylinder
heating control valve – no possible irritation of the cylinder stratification through
the return (option)
nAutomatic ignition through a hot air fan (with automatic charging)
nAutomatic heat exchanger cleaning via coil springs
nAutomatic ash removal into an ash box with 20 litre capacity (option)
Specification
nRated output range: 35 to 100 kW
nEciency up to 92 %
nPermissible flow temperature up to 100 °C
nPermissible operating pressure 3 bar
nCE designation according to current Directive
For specification see page 18
Pyromat DYN with automatic charging

System components
The complete system from a single source. That makes perfect sense, since all
Köb system components are perfectly matched to each other and consequently
form a complete heating system.
The operator is therefore assured of an absolutely reliable operation and a quality
service for the entire system from a single source.
System technology
The boiler system incorporating the boiler
assembly (boiler pump, boiler control valve) as
well as the variable speed induced draught fan
are fully wired.
Automatic ash removal (20 litre capacity)
(only with the Pyromat DYN)
The clean combustion leaves only the
minerals stored in the wood behind as ashes.
A grate with moving grate elements extracts
the ashes from the combustion chamber and
guides them into the ash container. As soon
as they have cooled down, the ash removal
conveyor guides the ashes into a large-volume
external ash container.
Solid room discharge for woodchips
(only with the Pyromat DYN)
With dierent discharge radii and screw
lengths, the system is matched perfectly to
the physical site conditions.
Feed screw for pellets
(only with the Pyromat DYN)
The feed screw is an extremely adaptable,
easy to install and quiet pellet charging
solution with low power consumption.
Boiler feed with dispensing hopper
The boiler feed with dispensing hopper can be
fitted either on the left or right side of the log
boiler. This sophisticated system oers the
highest protection against fires.
Fully assembled heat manifold
The fully assembled heat manifold is available
for installation on the boiler or as a wall
mounted version.
Heating water buer cylinder or
DHW cylinder
An extensive range of high quality products
(integrated or supplied separately) including all
accessories are available.
Test marks
All components are thoroughly tried,
tested and approved by dierent
bodies
TÜV-tested to EN 303-5
Test report EMPY approval VKF
VHe type-tested
Automatic ash removal (20 litre capacity)
Solid room discharge for woodchips
Feed screw for pellets
Boiler feed with dispensing hopper

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The Ecotronic system control unit is a decentralised microprocessor system (CAN BUS)
with dierent modules that are easily connected by means of a data cable.
Comprehensive energy management
Ecotronic as boiler controller
Central heating
Weather-compensated heating circuit control
with digital time switch for individual day and
7-day programs
nOn request with room device
nECO control and frost protection function
nEasy setting of individual heating curve
DHW cylinder
nDHW cylinder is automatically reheated
by the boiler or the heating water buer
cylinder
nVolume control with minimum return
temperature for precise cylinder
stratification
nThe heating water buer cylinder supplies
DHW for up to 14 days (summer mode)
Air heater
nAir volume control with minimum return
temperature for precise cylinder
stratification
Solar control unit
nSolar energy is stored in the DHW cylinder
or in the heating water buer cylinder
nThe Ecotronic enables the maximum heat
transfer from the solar collectors to the
heating system
nMay be extended up to 12 groups with the
distribution module on the heat manifold.
Ecotronic as boiler controller
Combustion controller
The combustion controller is integrated into
the log boiler and regulates the motorised air
dampers via the integral Lambda probe. The
appliance is fully wired internally. This results
in perfect combustion, optimised for lowest
emissions.
Charging controller
The CAN BUS control is a new feature. It
enables charging motors to be controlled via
an integral BUS cable directly from the boiler
module to the Starttec controller. The three-
phase power is routed to the motors, ready to
plug in. In this case too, the connection at the
boiler is simple, making extensive installation
unnecessary. The control is free of wear, even
with high switching frequency. An integral
motor protection (overload and temperature
relays) ensures a reliable operation.
Boiler assembly controller
The return temperature raising facility ensures
a long service life for the log boiler. Best
possible protection against overheating is
ensured by heat transfer to the DHW cylinder,
shutting down the induced draught fan and
closing the air dampers. The boiler assembly
(pump and control valve) is fully wired and
fitted to the log boiler.
Ecotronic control unit

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Hydraulics Pyromat ECO
The right heat concept ensures the reliable and safe operation of a log boiler.
Hydraulic connection of a Pyromat ECO
Heating water buer cylinder
nPerfect wood combustion requires an
adequately sized heating water buer
cylinder (specified by EN 303-5 since
2000). A precise layering of heat is a
must for the optimum utilisation of the
available heat.
nThe Ecotronic control unit with the reliable
cylinder control valve ensures this function
in an excellent fashion.
nThe utilisation of solar energy can therefore
be combined perfectly with log combustion.
Heat management (ECO function)
nDuring the combustion phase, boiler heat
not required for heating purposes is routed
into the heating water buer cylinder with
precision layering.
nAfter burnout, the residual boiler heat is
fully utilised. The utilisation of residual heat
as practiced by Köb received an award
as part of the Swiss ENERGIE 2000
campaign. In trials, an increased yield of
9 % per burnout was achieved.
nOnly then is heat supplied by the heating
water buer cylinder. The clever control
modules for heating convenience discharge
the heating water buer cylinder with
precision according to the stratified
temperature layers.
nThis delivers heat from the heating water
buer cylinder over the longest possible
time.
Hydraulic scheme for a log boiler
providing cylinder heating
Key to symbols
1Pyromat ECO log boiler
2Heating water buer cylinder
3DHW cylinder
4Expansion vessel
5Central heating
6Boiler assembly
7Heating assembly
8Cylinder assembly
9Buer cylinder control valve
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Flow temperature sensor
11 Heating water buer cylinder sensor
12 DHW cylinder sensor
13 Cylinder return temperature sensor
14 Ecotronic control unit

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Storage and
supply systems
Pyromat DYN
The adjustable feed screw is easy to install and can be tailored to the specific physical
site conditions.
Patented pellet discharge.
Storage and supply systems for the Pyromat DYN
Boiler feed with dispensing hopper with
fire protection
The solidly constructed feed screw made
from heat resistant chrome-nickel steel
charges the fuel – irrespective of whether
pellets or woodchips – into the combustion
chamber in accurately dispensed volumes.
A dispensing hopper with light guard that
determines the level of the separating fuel
layer, is located above the screw. This fuel
barrier prevents an exchange of gases and
consequently a back burning of the fuel.
A second back burning protection takes
the form of the tested shut-o slider. This
spring-loaded slider opens during the heating
phase and closes automatically afterwards or
in case of a power failure.
For woodchips
Solid room discharge
A bottom agitator with two leaf spring arms
fills a screw channel let into the floor. Agitator
and feed screw are designed for robust
operation and high torque. This safeguards
a trouble-free and reliable fuel discharge
of the most diverse woodchips. The stable
torque support protects the gearbox against
overloads and ensures a consistently smooth
and quiet operation.
For pellets
Very quiet feed screw with low power
consumption
The feed screw is made from hardened steel
(chrome-nickel steel) and is characterised by
its high torsional strength, spring loading and
the lowest friction losses. Outside the store
room, the feed pipe is made from natural
chrome-nickel steel.
Fuel silo for pellets with quiet
plastic feed screw with low power
consumption
Fuel silo for woodchips with solid
room discharge

Specification
Rated output kW 40 50 60 75 80 95
Hopper
Width
Capacity
mm
litres
550
185
550
185
550
255
550
255
550
255
550
255
Dimensions
Length
Width
Height
mm
mm
mm
958
795
1433
958
795
1433
116 3
795
1490
116 3
795
1490
1313
795
1490
1313
795
1490
Weight kg 750 760 920 935 1040 1065
Flue outlet ø mm 200 200 200 200 200 200
Pyromat ECO
Log boiler for logs up to 0.5 m long
Rated output kW 85 100 120 170
Hopper
Width
Capacity
mm
litres
1080
375
1080
375
1080
500
1080
500
Dimensions
Length
Width
Height
mm
mm
mm
1018
1324
1433
1018
1324
1433
1353
1324
1490
1353
1324
1490
Weight kg 1300 1320 1680 1720
Flue outlet ø mm 200 200 250 250
Pyromat ECO
Log boiler for logs up to 1 m long

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Rated output
Operation with logs kW 49 75 100
Rated output
Operation with woodchips kW 35 52 70
Hopper
Width
Capacity
mm
litres
550
185
550
255
550
255
Dimensions
Length
Width
Height
mm
mm
mm
958
795
1430
116 3
795
1490
1313
795
1490
Weight kg 760 935 1065
Flue outlet ø mm 200 200 200
Pyromat DYN
Log boiler

Vitosol flat-plate and tube collectors
Wood heating systems
Wood boilers are ideal for integrating with
one or more sources of energy, such as
fossil fuels or solar thermal energy. Our
comprehensive product range oers
heating systems for all forms of energy that
are considerably more than just individual
heating components. Whether it is an oil/
gas boiler or a solar thermal system, all parts
fit together perfectly and form a reliable and
economical system.
High performance solar thermal systems
Our high performance solar thermal systems
with flat-plate or vacuum tube collectors
are ideal for the DHW heating and as central
heating backup for your biomass system.
By incorporating solar energy, you can reduce
the costs for generating domestic hot water
by up to 65 % (depending on the size of
the solar thermal system) and you can also
increase your contribution to the environment.
Perfectly matched to suit your system
With Viessmann system technology, you can easily expand your wood heating systems
and enjoy all the benefits in an integrated system working with renewables.
Viessmann system technology

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Vitocell DHW cylinders
High performance DHW cylinders
The Vitocell DHW cylinders for indirect
heating enable a quick, plentiful and reliable
supply of DHW at all times. For applications
requiring large amounts of DHW, the
vertical and horizontal DHW cylinders can
be combined to create cylinder banks. By
integrating the DHW supply into your wood
heating system, you can save up to 50 % of
the running costs compared to directly heated
DHW.
Proven boilers
In an integrated system working with
renewables, wood heating is often connected
to a conventional oil/gas boiler that covers
peak loads or backs up the biomass boiler.
Depending on the type and temperature
demand of your system, Viessmann oers
highly ecient condensing boilers as well as
low temperature boilers.
1Viessmann bespoke control panel
2Solar thermal system
3Wood boiler
4Condensing boilers
5Low temperature boiler
6DHW cylinder
7System distribution

References
Köb wood heating systems
Köb has been installing commercial
wood heating systems for more than
30 years. During that time it has achieved
significant recognition for its innovative
and environmentally responsible products.
Köb is part of the Viessmann Group, which
supplies innovative high performance heating
systems and systems for renewables.
Wood heating systems in operation
More than 1500 installations around the world operate with wood heating systems from Köb.
Alpine guest house Hörmoos –
a Pyromat DYN 65 heats the guest
house and the holiday guest rooms
Pyromat DYN with spring core
discharge
Storage room