KOB PYROMAT ECO 35 Technical Manual

Brand: KOB

Model: PYROMAT ECO 35

Category: Heat pumps

Type: Technical Manual

This manual is also suitable for

PYROMAT ECO

Wood gasification boiler, 40 to 170 kW

PYROMAT ECO

Wood gasification boiler for logs up to 100 cm in length and

residual wood, with a connection option for an oil burner

5822 508 GB 5/2010

Technical guide

Index

1. Principles of wood combustion for

generating heat

1.1 Principles of log combustion for generating heat .......................................................... 4

■Units of measurement for wood fuel ......................................................................... 4

■Calorific and emission values ................................................................................... 4

■Influence of moisture on the net calorific value ......................................................... 4

1.2 Minimum wood fuel requirements ................................................................................. 5

■Substances ............................................................................................................... 5

■Origin, treatment and storage ................................................................................... 5

■Size of the woodchips ............................................................................................... 5

■Further information .................................................................................................... 6

■ Non-wood fuels made from biomass ........................................................................ 6

■Wood fuels: regulations and standards ..................................................................... 6

2. Pyromat Eco 2.1 Product description ....................................................................................................... 7

■Benefits ..................................................................................................................... 7

■Benefits at a glance .................................................................................................. 7

■Delivered condition ................................................................................................... 8

2.2 Specification ................................................................................................................. 9

■Specification .............................................................................................................. 9

3. Control unit 3.1 Specification for Ecotronic ............................................................................................ 12

■ Structure and function ............................................................................................... 12

3.2 Accessories for Ecotronic ............................................................................................. 12

■ Modules and data cables .......................................................................................... 12

■ Controller, heat source, single .................................................................................. 13

■ Controller, heat source, single, modulating ............................................................... 14

■ Controller, heat source, parallel KP2 ........................................................................ 14

■ Controller, central heating ......................................................................................... 14

■ Controller, adjacent building ..................................................................................... 15

■ Room controller QAA 35 ........................................................................................... 15

■ Safety thermostat RAK-TW.1000B ........................................................................... 15

■ Controller, long-distance line .................................................................................... 16

■ Controller, space heater ............................................................................................ 16

■ Controller, DHW cylinder B1 ..................................................................................... 17

■ Controller, DHW cylinder B2 ..................................................................................... 17

■ Controller, DHW circulation ....................................................................................... 18

■ Controller, solar DHW cylinder .................................................................................. 18

■ Controller, solar/DHW and central heating ............................................................... 19

■ Visualisation .............................................................................................................. 22

■ Visualisation, additional functions ............................................................................. 22

3.3 Routing the CAN BUS .................................................................................................. 22

4. Heating water buffer cylinder 4.1 Specification, buffer cylinder ......................................................................................... 24

■ Buffer cylinder HPM .................................................................................................. 24

5. DHW cylinder 5.1 Specification, DHW cylinder ......................................................................................... 26

■ DHW cylinder, enamel ............................................................................................. 26

■ DHW cylinder V4A ................................................................................................... 27

5.2 Specification, solar DHW cylinder ................................................................................. 28

■ Solar DHW cylinder, enamel .................................................................................... 28

■ Solar DHW cylinder V4A .......................................................................................... 29

5.3 Accessories, DHW cylinder .......................................................................................... 31

■ Intermediate flange Da = 290/180 mm ...................................................................... 31

■ Immersion heaters .................................................................................................... 31

6. Installation accessories 6.1 Boiler accessories ......................................................................................................... 32

■ Boiler safety equipment ............................................................................................ 32

■ Burner trolley ............................................................................................................. 32

6.2 Accessories, heat distribution ....................................................................................... 33

■ Motorised three-way valve ........................................................................................ 33

■ Motorised three-way valve ....................................................................................... 33

■ Pumps ....................................................................................................................... 33

■ Heating distributor, wall mounting ............................................................................. 33

■ Heating distributor connection ................................................................................. 34

■ Heating assembly for heating distributor NW 25 ...................................................... 34

6.3 Accessories for the flue system .................................................................................... 35

■ Reduction, flue gas connection ................................................................................. 35

■ Flue gas fan inlet adaptor 90° left ............................................................................. 35

■ Flue gas fan inlet adaptor 90° right ........................................................................... 35

■ Flue gas dust extractor ............................................................................................. 36

Index

2PYROMAT ECO

5822 508 GB

7. Design information 7.1 Positioning .................................................................................................................... 37

7.2 Connection on the flue gas side ................................................................................... 37

7.3 Water connection .......................................................................................................... 38

■ Sizing of the heating water buffer cylinder to EN 303-5 ............................................ 38

■ Safety equipment to DIN EN 12828 .......................................................................... 38

8. Application examples 8.1 Sample application ...................................................................................................... 39

■ Sealed system with diaphragm expansion vessel (boiler with heating water buffer

cylinders, two heating circuits with mixers and an additional heat source

(optional)) .................................................................................................................. 39

9. Appendix 9.1 Sizing the expansion vessel ......................................................................................... 41

10. Keyword index .............................................................................................................................................. 42

Index (cont.)

PYROMAT ECO 3

5822 508 GB

1.1 Principles of log combustion for generating heat

Units of measurement for wood fuel

The units of measurement commonly used in forestry and the timber

industry for wood fuel are solid measures of timber (smt) and stacked

cubic metres (stcm). The solid measure of timber (smt) describes

1 m3 of solid timber mass in the form of assorted round timbers.

The stacked cubic metre (stcm) is a measure for stacked or tipped

wood, measuring a total volume of 1 m3, including air gaps. On aver-

age, one solid measure of timber equals 1.4 stacked cubic metres.

Conversion table for assorted common firewood

Unit of measurement Solid measure

of timber (smt)

Stacked cubic

metre (stcm)

Stacked cubic

metre (stcm)

Tipped cubic

metre (tcm)

Tipped cubic

metre (tcm)

Assorted Round timbers Logs Logs Woodchips

stacked tipped G 50 "medium"

1 smt round timber 1 1.40 1.20 2.00 3.00

1 stcm logs

1 m long, stacked

0.70 1.00 0.80 1.40 (2.10)

1 stcm logs

split, stacked

0.85 1.20 1.00 1.70

1 tcm logs

split, tipped

0.50 0.70 0.60 1.00

1 tcm (forest) - woodchips

G 50 "medium"

0.33 (0.50) 1.00

Calorific and emission values

Timber is a renewable fuel. During combustion, on average approx.

4.0 kWh/kg units of energy are released.

The table shows the net calorific value of various types of timber with

a water content of 20 %.

Type of timber Density Net calorific value (approx. at 20 %

water content)

kg/m3kWh/smt kWh/stcm kWh/kg

Conifers

Spruce 430 2100 1500 4.0

Fir 420 2200 1550 4.2

Pine 510 2600 1800 4.1

Larch 545 2700 1900 4.0

Deciduous

Birch 580 2900 2000 4.1

Elm 620 3000 2100 3.9

Beech 650 3100 2200 3.8

Ash 650 3100 2200 3.8

Oak 630 3100 2200 4.0

Hornbeam 720 3300 2300 3.7

1 litre of fuel oil can be replaced by 3 kg of timber, assuming typical

efficiency. A stacked cubic metre (stcm) of beech corresponds to the

energy of approx. 200 litres of fuel oil or 200 m3 of natural gas. There-

fore burning wood contributes to the preservation of the finite reserves

of oil and gas.

Timber has a generally neutral CO2 balance, as the CO2 created during

combustion is immediately reabsorbed into the photosynthesis cycle

and therefore contributes to the formation of new biomass. Another

environmental aspect is the fact that timber contains hardly any sul-

phur, therefore almost no sulphur dioxide is created during combus-

tion.

Influence of moisture on the net calorific value

The water content of timber substantially influences its net calorific

value. The more water timber contains, the lower its net calorific value,

since the water evaporates during combustion and consumes energy

in the process.

Two measures are used to specify the water content:

■ Water content

The water content of timber is its water mass as a percentage of the

total timber mass.

■ Timber moisture level

The timber moisture level (hereafter referred to as moisture or mois-

ture level) is the water mass as a percentage of the total timber mass

excluding water.

The graph shows the relationship between the water content and the

moisture level, as well as the dependency of the net calorific value.

0 10 20 30 40 50

Water content in %

0 25 50 100

Moisture level in %

Calorific value kWh/kg

Freshly cut timber has a moisture level of 100 %. During storage over

one summer, this moisture level reduces to approx. 40 %. During stor-

age over several years, this moisture level reduces to approx. 25 %.

Principles of wood combustion for generating heat

4PYROMAT ECO

5822 508 GB

The graph shows the dependency of the net calorific value on the water

content, using spruce as an example. With a water content of 20 %

(moisture level 25 %), the net calorific value is 4.0 kWh/kg.

The net calorific value of timber stored over several years is approx.

twice that of freshly cut timber.

Storage

Not only is the combustion of moist wood uneconomical, it also leads

to low combustion temperatures and high emissions plus tar deposits

inside the chimney.

Information on storing firewood

■ Split round logs from a diameter of 10 cm upwards. Enlarging the

surface area enables the wood gases to be expelled more quickly

and simply. The drying process is also accelerated during storage.

■ Stack the logs in a ventilated and preferably sunny spot underneath

a rain canopy.

■ Stack the logs with generous air gaps to enable the flowing air to

carry off the dissipating moisture.

■ A hollow should be created underneath the wood pile (e.g. in the

form of support timbers) to allow moist air to escape downwards.

■ Never store freshly cut wood in a cellar, as air and sunshine are

required for drying. However, dried wood can be stored in a well

ventilated cellar.

1.2 Minimum wood fuel requirements

Wood remnants, coarse woodchips and compressed shavings can be

used in the Pyromat Eco. The Pyromat Eco is ideal for the combustion

of logs. The wood should have an edge length between 45 and 50 cm

or up to 100 cm (depending on the boiler type: boilers for 50 cm logs

or 100 cm logs). The rated wood boiler output will only be achieved

with dry wood with maximum 20 % water content (air-dried wood).

Wood of poorer quality and higher moisture content also reduces the

rated output and the length of combustion.

When using softwood (e.g. spruce), note that the energy per volume

unit is lower than with hardwood (e.g. beech). Softwood is therefore

suitable for "initial heat-up" - however, its use shortens the intervals

between recharging considerably and increases the volume to be used

(up to 44 %). Observe the requirements specified in the next chapter

relating to non-combustible substances and their limits for warranty

period claims. Deviations are only possible through written, system-

specific manufacturer declarations.

Substances

When procuring wood for combustion in a Pyromat Eco, foreign matter

(e.g. stones, metal parts, brick, plastics, etc.) should be avoided. This

changes the composition of the fuel and therefore the critical param-

eters of the combustion process.

The values (per kg of dry fuel) of the non-combustible substances (ash

at an analysis temperature of 815 °C) must not fall below or exceed

the following limits:

Limit Comparison with natural wood from forests

Chlorine Cl mg/kg max. 300 10

Sulphur S mg/kg max. 1000 120

Total Cl, S mg/kg max. 1000 130

Ash content total g/kg max. 15.0 5.0

Alkali oxides in the ash (K2O and Na2O) g/kg max. 1.0 0.35

SB start of ash sintering °C min. 1000 approx. 1200

A consequence of the above limits being exceeded is a shortened

service life of the combustion chamber and the wood boiler. The main-

tenance work is also increased and the maintenance intervals are

shortened.

The proportion of dust-like and fine-grained materials should also be

minimised (acc. to ÖNORM M 7133).

Origin, treatment and storage

Depending on the origin, wood can be natural wood (e.g. forest wood

and waste from sawmills), residual wood from wood processing plants

or waste wood (building rubble, furniture). The wood must be obtained

and, if required, cut to the desired size and treated with regard to for-

eign matter. In addition to the requirement to adhere to ÖNorm M 7133,

a max. proportion of 5 % outliers in the fuel should be observed.

The length of the outliers must not exceed 16 cm (with a cross-section

of max. 5 cm²). The surface of the fuels should be roughened where

possible (e.g. through shredder, etc.). When using briquettes, ensure

compression is matched to charging. The maximum diameter is 60

mm.

Size of the woodchips

The Pyromat Eco is also suitable for the combustion of coarse woodchips. To prevent increased maintenance work, appropriate coarse wood-

chips in accordance with ÖNorm M 7133 should be used.

Principles of wood combustion for generating heat (cont.)

PYROMAT ECO 5

5822 508 GB

Further information

Ash and cleaning

Natural wood without bark has a percentage of ash less than 0.5 % of

the supplied fuel mass. All information regarding cleaning work is

based on natural wood with attached bark and an ash percentage of

0.8 %. The cleaning and maintenance work for other wood fuels should

be matched according to the quantity, the specific weight and the ash

characteristics.

Changing fuels

Frequent and intensive changes in fuel quality, e.g. bulk density, water

content, dust proportion and ash content, can require a manual adjust-

ment of the combustion system parameters.

Non-wood fuels made from biomass

Non-wood fuels made from biomass such as needles, leaves, cereals,

straw, husks, fruit stones, etc. are generally unsuitable as fuel for fault-

free operation, and are therefore not permissible.

The fuel properties (elementary composition, ash sintering point, etc.)

deviate from wood, in some cases considerably. Combustion in a

Pyromat Eco can lead to an impairment of the combustion character-

istics and increased stress on the fireclay lining and the heat

exchanger surfaces. Warranty claims can therefore only be asserted

when using permissible fuels.

Wood fuels: regulations and standards

Germany Revised first version of BImSchV dated 22.03.2010

Austria FAV dated 18.11.1997 "Ordinance for Combustion Systems" § 3.(1) 3. Solid fuels Solid fuels

Switzerland Clean air regulations LRV dated 16.12.1985 (dated 28.03.2000)

ÖNORM M 7133 Woodchips for energy purposes (1998)

EN 303-5 Boilers for solid fuels, table 8 "Test fuels"

CEN/TS 14961 Solid biofuels

Principles of wood combustion for generating heat (cont.)

6PYROMAT ECO

5822 508 GB

2.1 Product description

Benefits

AUpper charging door with a large hopper, with an extended down-

ward taper

BSecondary combustion chamber for complete burnout

CMaintenance cover for secondary combustion chamber with trol-

ley for burner support

DVertical tubular heat exchanger for optimum heat transfer

EFlue gas fan, solid version for long service life; strong underpres-

sure for high safety and simple recharging; noise optimised; low

power consumption

FPatented combustion chamber made from refractory concrete for

degasification

GSolid cast grate for hot degasification zone and long service life

The Pyromat Eco was developed specifically for the combustion of

logs and represents state of the art combustion technology.

The Pyromat Eco log boiler has already proven itself thousands of

times. Charging from the top offers easy handling, control via the

Lambda probe guarantees low emissions, and the integral heat man-

agement ensures maximum convenience.

Clean and efficient 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 permanently in all operating

phases, from heat-up, operation under load and recharging, right

through to burnout, and is held – via its motorised air dampers – within

its optimum operating range. Through this, clean and efficient com-

bustion is guaranteed.

Large hopper for combustion lasting several days

The Pyromat Eco offers the greatest operating convenience when

heating with logs due to its large charging chute. Log boilers in the

output range 40 to 95 kW can operate with logs of 0.5 m in 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 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 wood remnants, either loose or in pieces.

The Pyromat Eco boiler system has been tested in accordance with

the latest quality criteria to EN 303-5 "Boilers for solid fuels", and can

be brought into circulation with CE designation (RL 98/38/EC etc.) and

VKF approval.

Benefits at a glance

■ Log boiler for logs of 0.5 and 1 m length with high operating con-

venience through charging from the top

■ For the fuels: logs, wood briquettes and wood remnants, either loose

or in pieces

■ Large hopper capacity (185 to 500 litres) for combustion lasting sev-

eral days

■ Fully wired

■ Proven induced draught fan for quiet operation and a long service

life

■ No draught controller or limiter required

■ Constantly regulating air damper with heat-up and burnout optimi-

sation

■ Accurate 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)

■ Return temperature raising facility with buffer control valve, fully

assembled

■ Not sensitive to foreign bodies (nails, screws etc.)

■ Integral buffer heating management

■ Lambda probe control

Pyromat Eco

PYROMAT ECO 7

5822 508 GB

Delivered condition

Boiler with the following components:

■ Fully wired flue gas fan with flue gas temperature sensor and

Lambda probe

■ Fully assembled return temperature raising facility

■ Buffer control valve

■ Ash box, stoking and cleaning

device

■ Fully assembled casing panels

■ Ecotronic

– Electronic module integrated in the boiler, incl. high limit safety cut-

out (STB)

– Programming module

■ 13 buttons for operating external controllers

■ 3 sensors KTY incl. sensor well (R ½, 280 mm long) wired jointly to

connector

Note

Data cable for connecting to the programming module (separate

item), see page 12

Fully assembled return temperature raising facility

The return temperature raising facility is fully fitted to the connection

flange. It comprises a boiler pump, boiler control valve, and flow and

return temperature sensors, incl. the connecting pieces. The pump is

located between two shut-off valves.

Pyromat Eco (cont.)

8PYROMAT ECO

5822 508 GB

2.2 Specification

Specification

Pyromat Eco... 35 45 55 65 75 85 61 81 101 151

Rated output kW 40 50 60 75 80 95 85 100 120 170

Min. heat consumption, wood kW 35 38 45 55 60 75 60 75 90 110

Max. log length m 0.5 0.5 0.5 0.5 0.5 0.5 1 1 1 1

Hopper capacity l 185 185 255 255 255 255 375 375 500 500

Boiler water content l 130 130 170 170 210 210 230 230 300 300

Boiler weight (dry) kg 750 760 920 935 1040 1065 1300 1320 1680 1720

Test pressure bar 6 6 6 6 6 6 6 6 6 6

Max. operating pressure bar 3 3 3 3 3 3 3 3 3 3

Max. boiler water temperature, wood °C 100 100 100 100 100 100 100 100 100 100

Min. return temperature °C 70 70 70 70 70 70 70 70 70 70

Water-side pressure drop (diff. 10 K) mbar 32 32 62 62 98 98 56 56 112 112

Water-side pressure drop (diff. 20 K) mbar 8 8 16 16 25 25 14 14 28 28

Thermally activated safety valve: min.

flow rate at 2.5 bar

kg/h 2000 2000 2800 2800 3500 3500 3500 3500 5500 5500

Boiler efficiency

(rated output, wood)

% 92 92 92 92 92 92 92 92 92 92

Flue gas temperature (rated output,

wood)

°C 180 180 180 180 180 180 180 180 180 180

Flue gas mass flow rate

(rated output, wood)

g/s 30.4 35.2 44 56 60 68 58.4 72 88 108

Max. draught, wood*1 Pa 25 25 25 25 25 25 25 25 25 25

Rated output, oil kW 35 38 45 55 60 75 60 75 90 110

Boiler efficiency

(rated output, oil)

% 87 87 87 87 87 87 87 87 87 87

Flue gas temperature

(rated output, oil)

°C 168 168 168 168 170 170 172 172 168 168

Required chimney draught*2 Pa ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0

Electrical output, flue gas fan kW 0.08 0.08 0.08 0.08 0.15 0.15 0.15 0.15 0.25 0.25

Return temperature raising facility

with buffer control valve

Boiler pump Wilo Type RS 30/6 TOP-S 30/7 EM TOP-S 40/7 EM

Electrical output, pump W 46 - 93 85 - 195 220 - 390

Pump output m3/h

mWC

2.5 at 6.5 7.5 at 7.0 16.5 at 7.0

Boiler control valve Siemens Type VXG

48.32

VXG

48.32

VXG

48.32

VXG

48.32

VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

Drive, boiler control valve Siemens SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

Weight, return temperature raising

facility with buffer control valve

kg 14 14 16 16 20 20 20 20 40 40

Cylinder control valve Siemens Type VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

VXG

48.40

VBF

21.50

VBF

21.50

Drive, cylinder control valve SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQS

35.00

SQK

SQK 33

Weight, cylinder control valve kg 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 6.9 6.9

Connections

Flue gas connection DN 200*3 200*3 200*3 200*3 200 200 200 200 250 250

Drain R ½ ½ ½ ½ ½ ½ ½ ½ ½ ½

Boiler return R 1¼ 1¼ 1¼ 1¼ 1½ 1½ 1½ 1½ 1½ 1½

Boiler flow R 1¼ 1¼ 1¼ 1¼ 1½ 1½ 1½ 1½ 1½ 1½

Safety connection R ½ ½ ½ ½ ½ ½ ½ ½ ½ ½

Temperature sensor R ½ ½ ½ ½ ½ ½ ½ ½ ½ ½

Sight glass R 1 1 1 1 1 1 1 1 1 1

*1 Maximum overpressure in the start phase (chimney cold) in the flue pipe downstream of the flue gas fan

*2 No draught limiter required

*3 Reduction to DN 160 or DN 180 possible

Pyromat Eco (cont.)

PYROMAT ECO 9

5822 508 GB

a45

b 45

d 183

g = = h

265 293

1134

108

AGA

≥100 n

q 365

≥800

KR KV

AGA Flue gas connection

E Drain

KR Boiler return

KV Boiler flow

SA Safety connection for thermally activated safety valve

SG Sight glass (transportation hook)

TS Temperature sensor for thermally activated safety valve

AHopper door

BBoiler module with high limit safety cut-out

CAsh chamber door

DPrimary air damper with servomotor

EBoiler pump

FSockets for electrical connection

GBoiler control valve with servomotor

HCleaning door, top

KFlow temperature sensor

LFlange for fitting the burner trolley, maintenance cover, com-

bustion chamber (on both sides)

MReturn temperature sensor

NCleaning door, bottom

OMotor, flue gas fan

PLambda probe

RFlue gas temperature sensor

SSecondary air damper with servomotor

Pyromat Eco (cont.)

10 PYROMAT ECO

5822 508 GB

Dimensions

Pyromat Eco ... 35 45 55 65 75 85 61 81 101 151

a mm 1433 1433 1490 1490 1490 1490 1433 1433 1490 1490

b mm 795 795 795 795 795 795 1324 1324 1324 1324

b without thermal

insulation

mm 686 686 686 686 686 686 1246 1246 1246 1246

c mm 550 550 550 550 550 550 1080 1080 1080 1080

d mm 214 214 214 214 214 214 480 480 480 480

e mm 1331 1331 1389 1389 1386 1386 1328 1328 1386 1386

f mm 811 811 869 869 693 693 635 635 636 636

g mm ≥ 600 ≥ 600 ≥ 600 ≥ 600 ≥ 600 ≥ 600 ≥ 800 ≥ 800 ≥ 800 ≥ 800

h mm ≥ 200 ≥ 200 ≥ 200 ≥ 200 ≥ 200 ≥ 200 ≥ 400 ≥ 400 ≥ 400 ≥ 400

k mm 770 770 773 773 813 813 770 770 876 876

l mm 300 300 400 400 475 475 300 300 400 400

m mm 1892 1892 2012 2012 2012 2012 1892 1892 2012 2012

n mm 500 500 500 500 630 630 630 630 630 630

o mm 175 175 175 175 300 300 300 300 300 300

p mm 958 958 1163 1163 1313 1313 1018 1018 1353 1353

q mm 647 647 769 769 842 842 631 631 820 820

Pyromat Eco (cont.)

PYROMAT ECO 11

5822 508 GB

3.1 Specification for Ecotronic

Structure and function

Modular structure

The Ecotronic system control unit is a decentralised microprocessor

system (CAN BUS). To control the boiler system, the Ecotronic com-

prises a module (PCB) integrated into the boiler, and the programming

module. Three-sensor cylinder management is part of the standard

Ecotronic version.

Controller modules can be added to the Ecotronic (modular structure).

It is therefore possible to extend operation individually according to

customer requirements.

Programming module

The programming module is included in the standard delivery for the

boiler and is used to operate the heating system. Preferably install on

a wall and connect to boiler via a data cable.

The backlit screen offers an extensive text display.

F10F9 F12

F11

F13

F14 F15 F16

F2F1 F4

Ecotronic

The programming module

Functions

■ Output and cylinder control is carried out by constantly regulating air

dampers with heat-up and burnout optimisation

Rated load: during cylinder heating

Partial load: at the end of the phase of cylinder heating

■ Lambda probe enables efficient combustion control and maximum

efficiency

■ Keeping up the return temperature with the boiler control valve

■ Release of the complete heating output during the start phase of the

boiler to the consumers (no output transfer into cylinder via return)

■ Accurate temperature stratification of the cylinder with the cylinder

control valve

■ Safe recharging with wood through the closing of the primary air

damper during recharging

■ Use of the residual boiler heat after burnout

■ Supporting auxiliary and service functions

■ Control of an additional oil burner

■ Protection against overheating through heat transfer to the buffer

cylinder, shutting down the flue gas fan and closing the air dampers.

3.2 Accessories for Ecotronic

Modules and data cables

The standard Ecotronic version can be customised with additional

controller modules or controllers and data cables. Additional heat

sources, heat consumers or DHW cylinders can be incorporated into

the control system with/without solar heating circuit backup.

Data cables

The data cable connects the individual modules (boiler module, pro-

gramming module, controller module) to the overall system control

unit. Data cables can be connected together (max. 2 cables). The total

length of all CAN BUS cables must not exceed 200 m.

Description Part no.

Data cable with connector 10.0 m standard 7387 587

Data cable with connector 2.0 m 7387 858

Data cable with connector 5.0 m 7388 000

Description Part no.

Data cable with connector 20.0 m 7388 025

Data cable with connector 40.0 m 7387 588

Data cable with connector 80.0 m 7387 972

Data cable with Y-distributor 7387 948

Controller module

The controller module is supplied in a plastic casing (length 325 mm,

height 195 mm, depth 75 mm) incl. outside temperature sensor

(QAC 31).

The control keys for the controller module are available at the pro-

gramming module and are enabled according to the number of con-

trollers. The controller module has four controller outputs and seven

sensor inputs.

Control unit

12 PYROMAT ECO

5822 508 GB

Optional combinations

Additional controller modules (ECO-RM-00) for an additional charge

1 controller module 2 controller modules 3 controller modules

Programming module

13 controller keys

Max. 4 controllers and 7 sensors

possible

Max. 8 controllers and 14 sensors

possible

Max. 13 controllers and 21 sensors

possible

Overview: Possible Ecotronic controllers

Controller Part no. Keys Number of control-

lers

Number of sensors

Controller, additional heat sources

Heat source, single 7388 036 1 1 —

Heat source, modulating 7387 859 1 1 1

Heat source, parallel KP2 7387 864 1 2 1

Controller, central heating

Central heating 7379 402 1 1 1

Adjacent building 7387 865 1 2 2

Long-distance line 7379 401 1 1 1

Space heater 7387 825 1 1 1

Room controller QAA 35*4 7379 405 — — 1

Safety thermostat RAK-TW.1000B*5 7387 940 — — —

DHW controller

DHW cylinder B1 (without flow control) 7387 853 1 1 1

DHW cylinder B2 (with flow control) 7379 400 1 1 2

DHW circulation 7387 849 1 1 —

Controller, solar

Solar DHW cylinder 7387 818 1 1 2

Solar DHW and central heating 7387 786 1 2 2

Controller, heat source, single

ATwo-way valve

BBurner

Part no. 7388 036

The additional heat source is switched on automatically after heat is

drawn from the buffer cylinder to cover the heat demand (single oper-

ation). Heating of the buffer cylinder is only possible with the Pyromat.

If this is started, the additional heat source switches off and the closed

two-way valve prevents permeation.

Standard delivery:

■ Button, additional heat source

■ Controller output for two-way valve and burner

Note

See hydraulic scheme 40

*4 Only in conjunction with controller for central heating or controller for adjacent building.

*5 For limiting the heating circuit flow temperature.

Control unit (cont.)

PYROMAT ECO 13

5822 508 GB

Controller, heat source, single, modulating

ATwo-way valve

BBurner

CContact sensor QAD 21

Part no. 7387 859

The additional heat source is automatically switched on after heat is

drawn from the buffer cylinder to cover the heat demand (single oper-

ation). Heating of the buffer cylinder is only possible with the Pyro-

mat Eco. If this is started, the additional heat source switches off and

the closed two-way valve prevents permeation. The boiler water tem-

perature control is modulated to minimum temperature according to

the heat demand.

Standard delivery:

■ Button, additional heat source

■ Controller output for two-way valve and burner

■ Contact sensor QAD 21

Note

See hydraulic scheme 40

Controller, heat source, parallel KP2

AMixing valve

BPump

CContact sensor QAD 21

DBurner

Part no. 7387 864

The additional heat source is switched on automatically when required.

This may occur after heat is drawn from the buffer cylinder to cover the

entire heat demand (single operation). Otherwise the additional heat

source is used to cover peak heat demand (parallel operation to the

biomass boiler). For parallel operation, a return temperature raising

facility is required for heat transfer, which also ensures that the return

temperature is kept up. On request, the additional heat source can

heat the buffer cylinder (sensor optional).

Standard delivery:

■ Button, additional heat source

■ Controller output for pump, mixing valve and burner

■ Contact sensor QAD 21

Controller, central heating

Heating circuit with mixer

AContact sensor QAD 21

BPump

CMixing valve

Part no. 7379 402

Weather-compensated heating control unit with digital time switch for

setback mode according to individual day and seven-day program,

with pump control unit, frost protection function, eco mode and limited

flow temperature.

Standard delivery:

■ Button, central heating

■ Controller output for pump and mixing valve

■ Contact sensor QAD 21

Control unit (cont.)

14 PYROMAT ECO

5822 508 GB

Controller, adjacent building

Heating circuit with mixer and DHW pipe

ADiverter valve

BAdjacent building

CContact sensor QAD 21

DPump

EMixing valve

FSensor QAZ

Part no. 7387 865

The cable to the adjacent building is controlled with weather compen-

sation via the heating circuit control unit. The DHW cylinder is heated

with the selected maximum flow temperature. For this, the heating

water is diverted to the DHW cylinder via a valve. By means of the time

switch, the DHW cylinder is reheated in the downtimes (setback peri-

ods).

Standard delivery:

■ Button, adjacent building

■ Controller output for pump, mixing valve and diverter valve

■ Contact sensor QAD 21

■ Sensor QAZ 21.5220 with sensor well ½" x 200 mm

Room controller QAA 35

Part no. 7379 405

Addition to the controller for central heating and controller for adjacent

building. The room controller can be connected as a remote control

unit and as a room temperature sensor (room temperature compen-

sation).

Standard delivery:

■ Room controller QAA 35

Safety thermostat RAK-TW.1000B

ASafety thermostat RAK-TW.1000B

Part no. 7387 940

For safe limitation of the flow temperature of a heating circuit.

Standard delivery:

■ Safety thermostat RAK-TW.1000B

Control unit (cont.)

PYROMAT ECO 15

5822 508 GB

Controller, long-distance line

ASub-distributor

BBypass

CContact sensor QAD 21

DPump

EControl valve

Part no. 7379 401

A building is supplied with separate heat distribution via a long-dis-

tance line.

The long-distance line is controlled upstream according to the demand

of the heating circuits. The heating circuits of the separate heat distri-

bution must be controlled via the Ecotronic.

Standard delivery:

■ Button, long-distance line

■ Controller output for pump and control valve

■ Contact sensor QAD 21

Note

The long-distance line controller module can only be used while Köb

controller modules in the sub-distributor is also being used.

Controller, space heater

APump

BMixing valve

CContact sensor QAD 21

Part no. 7387 825

The space heaters are supplied by the boiler cylinder system with

maximum flow temperature.

The switching of the fan is carried out by on-site switches or controllers.

The flow rate of the heating water is controlled via the return temper-

ature and matched to the output of the space heater (flow control). This

results in optimum cylinder stratification with sustained high tempera-

ture at the cylinder flow. The heating periods (individual day and

seven-day program) can be adjusted via the integrated time switch.

Standard delivery:

■ Button, space heater assembly

■ Controller output for pump and mixing valve

■ Contact sensor QAD 21

■ Restrictor, bypass

Control unit (cont.)

16 PYROMAT ECO

5822 508 GB

Controller, DHW cylinder B1

APump

BTwo-way valve

CSensor QAZ 21.5220

Part no. 7387 853

When the temperature of the DHW falls, the DHW is reheated via the

internal indirect coil by the boiler or the buffer cylinder. This is depend-

ent on a corresponding difference in temperature (either differential

temperature or fixed temperature control unit).

The heating periods (individual day and seven-day program) can be

adjusted via the integrated time switch.

Standard delivery:

■ Button, DHW cylinder

■ Controller output for pump and ball valve

■ Sensor QAZ21.5220 with sensor well ½" x 200 mm

Controller, DHW cylinder B2

APump

BControl valve

CSensor QAZ 21.5220

DContact sensor QAD 21

Part no. 7379 400

When the temperature of the DHW falls, the DHW is reheated via the

internal indirect coil by the boiler or the buffer cylinder. This is depend-

ent on a corresponding difference in temperature (either differential

temperature or fixed temperature control unit).

The flow rate of the heating water is controlled via the return temper-

ature (flow control). This results in optimum buffer cylinder stratification

with sustained high temperature at the buffer cylinder flow. The heating

periods (individual day and seven-day program) can be adjusted via

the integrated time switch.

Standard delivery:

■ Button, DHW cylinder

■ Controller output for pump and control valve

■ Contact sensor QAD 21

■ Sensor QAZ 21.5220 with sensor well ½" x 200 mm

Control unit (cont.)

PYROMAT ECO 17

5822 508 GB

Controller, DHW circulation

APump

Part no. 7387 849

The DHW circulation periods (individual day and seven-day program)

can be adjusted via the integral time switch.

The start-up duration of the DHW circulation pump can be adjusted via

timed cycling.

Standard delivery:

■ Button, DHW circulation

■ Controller output for pump

Controller, solar DHW cylinder

HR Heating return

HV Heating flow

KW Cold water

RL Return (solar)

VL Flow (solar)

WW DHW

ASolar collector

BCollector temperature sensor

CSolar station with solar circuit pump

DThermostatic water mixer

ECylinder temperature sensor QAZ 21.5220

Part no. 7387 818

Use for single solar thermal system as a single circuit control unit for

heating the DHW in the solar DHW cylinder.

If the temperature of the DHW (in the lower section of the DHW cylin-

der) falls below the collector temperature, the DHW is heated by the

solar collector (adjustable differential temperature: 2 - 20 °C).

Note

The controller for the solar DHW cylinder can only be used in con-

junction with a controller for a DHW cylinder (B1 or B2).

Run-on time of the solar circuit pump adjustable from 0 to 120 s (sub-

ject to line length).

Maximum DHW temperature adjustable from 20 to 90 °C.

Safety: the solar circuit pump switches off at 140 °C collector temper-

ature; restarts at 120 °C.

Standard delivery:

■ Button, solar

■ Collector temperature sensor PT-1000

■ Cylinder temperature sensor QAZ 21.5220

■ Controller output for the solar circuit pump

Control unit (cont.)

18 PYROMAT ECO

5822 508 GB

Controller, solar/DHW and central heating

Part no. 7387 786

Use for a larger solar thermal system for heating the DHW in the solar

DHW cylinder and for heat supply to the heating cylinder as a three-

circuit control unit.

The first circuit is used to heat the DHW, the second heats the heating

cylinder back/bottom and the third heats the heating cylinder front/top.

The heating cylinder is heated with an external plate heat exchanger.

Changing over from the DHW cylinder to the heating cylinder starts the

secondary pump. This then operates with the solar circuit pump. For

optimum functioning, the flow rate in the secondary circuit must be

matched to the primary circuit (e.g. with flow meter in the primary and

secondary circuits).

Differential temperature, collector/DHW 2-20 °C.

The following differential temperatures are freely adjustable:

differential temperature, collector/cylinder back/bottom 2-20 °C.

Note

Controller, solar/DHW and central heating can only be used in con-

junction with a controller for a DHW cylinder (B1 or B2).

Run-on time of the solar circuit pump adjustable from 0-120 s (subject

to line length).

Shutdown safety:

■ at 140 °C collector temperature

■ at 95 °C cylinder temperature

Optimised DHW priority (either absolute or no DHW priority).

Cylinder heating with stratification in accordance with the cylinder tem-

peratures via a charging valve for the cylinder front/back.

Standard delivery:

■ Button, solar

■ Collector temperature sensor PT-1000

■ Cylinder temperature sensor QAZ 21.5220

■ Controller output for the solar circuit pump

■ Controller output, charging valve, DHW cylinder

■ Controller output for secondary pump

■ Controller output, charging valve, cylinder back/cylinder front

Key to the schemes on pages 20 and 21

KW Cold water

WW Domestic hot water

ASolar collector

BSolar station with solar circuit pump

CThermostatic water mixer

DPlate heat exchanger

ECharging valve, DHW cylinder/buffer cylinder

FSecondary pump

GCharging valve, buffer cylinder front/back

HWood boiler

KExample: two heating water buffer cylinders in series

LExample: three heating water buffer cylinders in series

Control unit (cont.)

PYROMAT ECO 19

5822 508 GB

--B28.1--

--B28.2--

--B28.3--

Return

Flow

Control unit (cont.)

20 PYROMAT ECO

5822 508 GB

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KOB PYROMAT ECO 35 Technical Manual

Brand: KOB

Model: PYROMAT ECO 35

Category: Heat pumps

Type: Technical Manual

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