Beaversolid fuel boiler

20DLO30DLO40DLO50DLO60DLO

Beaversolid fuel boiler

20DLO30DLO40DLO50DLO60DLO

� Outputs from 18 to 45 kW - wood

� Outputs from 19 to 48 kW - coal

� Automatic output regulation by draught regulator

� Cast-iron heat exchanger

� Big combustion chamber

� Simply maintenance and installation

� Low thermal losses

� Delivery in assembled state

Beaver DLO – main features

Main parts DLO boilers

Flap of primary air feed

Secondary air feed

Ash cellar

Thermometer and manometer

Lower door

Upper door Thermostatic draught regulator

Combustion chamber

Technical parameters of DLO boilers

pcs. 4 5 6 8 10

kW 19 24 32 39 48

kW 18 23 29 35 45

°C

bar

°C

bar

pcs. 1 1 2 2 2

l 19,9 23,2 26,5 33,1 39,8

mm 320 370 430 550 680

mm

mbar 0,23 0,25 0,28 0,3 0,4

°C

g/s 10,7 16 18 21 33

col

l 800 1000 1350 1650 2000

kg 230 266 310 391 465Weight

Emission class 3

150

Chimney draught

Outlet/inlet of HW 2"

Size of recommended buffer tank

Flue temperature 250

5 - 15

Pressure of cooling water in

cooling loop2 - 6

Number of cooling loops

1

Max. working temperature 90

Max working pressure 3

Weighted flowrate - flue gas

Number of elements

Nominal output - coal

Nominal output - wood

Efficiency class

Temperature of cooling water in

cooling loop

Water volume

Max. length of wooden log

Chimney diameter

Type Unit 20 DLO 30 DLO 40 DLO 50 DLO 60 DLO

- max.

Output regulation

Boiler

Chain

Low temp.

High temp.

Flap

Primary air

� By opening and closing of the boiler's flap there is

regulated the volume of primary air

� The flap is controlled by thermostatic draught regulator,

whose steering rod is connected with the flap by a chain

� The most useful regulator location is position b) and c)

– above or on the side of the boiler. The location a),

which have some competitors boilers, suffer by often

failures because of hot air flow from combustion chamber

at the fuel feeding

�

Principles of Beaver fuel firingCombustion :

� The combustion chamber is divided into two parts – lower, into which is feed primary air and upper, into which is feed secondary air.

� The value of primary air is regulated by a flap, which is automatically controlled by a draught

regulator. The primary air supply affects the heat output.

� The secondary air is feed into the combustion chamber through the orifice on the upper door.

The air value is possible to set manually. This secondary air supply affects the burning

quality, effectivity and emission level.

Advantages:

� Lower fuel quality demands

� Simple maintenance

P

S

Wood heat value

The most important influence for the wood heat value is the woodwetness, because water inside the wood has got a big vaporization heat value (the need of heat power to change water into vapor), the bigger is the wetness the lower energy gain.

It is necessary to keep in view that dried wood could very easily to

get wet, in surrounding air with higher humidity. In case of using wet

coal there is no substantial heat value drop, but in case of using wet

wood we are loosing essential heat value which is stored in the

wood.

The wood wetness is possible to express as the mass percentage

of water to the whole wet wood mass.

Before using the wood it is necessary at least partially to dry it.

Generally it is recommended the wood has got the wetness under

30%, but optimum is the wetness up to 20% , which could be

reached by standard drying under the shelter.

�

�

�

�

Wood heat value

Závislosť výhrevnosti na obsahu vody v dreve

89

1011121314151617181920

0 10 20 30 40 50

Vlhosť [%]

Vý

hre

vn

osť [

MJ

/kg

]

Dependency of wood heat value according the wood wetness

Heat value(MJ/kg)

Wood wetness (%)

Thermostatic regulator

1) Temperature sensor

2) Spring

3) Rod

4) Thread

5) Regulator cover

6) Work driver

7) Steering rod

8) Setting button

9) Screw

Cooling down

°C

� According the standard STN EN 303-5:2000, it must be

provided safe cooling down in case of system pump

failure

� The temperature in the heating system may no exceed

110°C, under the condition the cooling water temperature

between 10 – 15°C

� The cooling loop is not necessary to install in case of

heating systems without pump (gravity systems)

Similar cooling loop is used at the producers Viadrus and Attack

Advantages:

�Mostly used solution by installers

�The cooling water is not supplied directly inside the cast-iron block exchanger

� Low production cost

Cooling loop – inside the steel body is a steel pipe, in which is supplied cooling water (it is not

allowed to use a house water-station, because in case of power drop it will be

stopped cooling water supply)

1. Outlet HW into the system

2. By-pass

3. Inlet HW

4. Inlet and outlet of cooling water

5. Thermostatic valve

6. Sensor of thermostatic valve

7. Cooling loop

Beaver cooling loop

� Thermostatic valve provides triggering of cooling water in cooling loop, when temperatureexceeds 95°C

� Protherm will offer two types of thermostatic valves for connection of cooling loops (WattsSTS 20 or Honeywell TS 130)

� Connection is possible also by means of other thermostatic valves (for example Caleffi)

� Thermostatic valve will not a part of delivery, it will be delivered only as an accessory

Cooling loop – thermostatic valve

Accessory

Hole for installation of

thermostatic valve's sensor

Price

[Eur]

0020049388 Therm. valve Honeywell TS 130

0020049389 Therm. valve Watts STS 20

Ordering code Describtion

Elbow of

cooling loop

Cooling loop tank

Protherm is using only one type of cooling loop tank with 6m steel pipe inside. Inlets and outlets from the cooling loop tank

are prepared for welding. A part of the delivery will be S-pipe, with a thread on one end for installation to the boilers outlet.

Cooling loop

4 and 5 element boilers

6,8 and 10 elements boilers

Cooling loop – 20,30 DLOHeating system

By-p

ass f

rom

co

olin

g lo

op

Inlet and outlet of cooling water

Standard operation Emergency state - overheating

Cooling loop – 40,50,60 DLO

Heating system

By-p

ass f

rom

th

e c

oo

lin

glo

op

Inlet and outlet of

cooling water

Standard operation Emergency state - overheating

Inlet and outlet

of cooling water

Firing

1. Dismount the chain of draught regulator

from the primary air door (the door must be fully closed)

2. Set the chimney flap to the horizontal

position (the draught will increase, so the risk of flue gasses escape to the room is minimal)

3. Open the upper door and start firing

Firing

If the primary air flap is during the firing open, the flue gasses will NOT go to the chimney, but to the room!!!!

If the primary air flap is during the firing closed, the flue gasses will go to the chimney.

Firing

Max. 1

80 m

m

Max. L

Log lenght [mm] 320 370 430 550 680

50 DLO 60 DLOBoiler type 20 DLO 30 DLO 40 DLO

Cleaning� After some time the soot and smokeshade are deposit on the boiler’s wall and mainly on the heat exchanger ribs and in the exhaust throat, which causes output cut-down and chimney draught decrease

� The mass of the soot and smokeshade depends on the wood quality and operational conditions

� If the boiler is overdesigned or is in operation with low HW temperature, it comes to a higher soot producing.

� The boiler wall and combustion way is recommended to clean regularly each months

� The part of the delivery is an accessory for boiler cleaning (fire-stick, steel brush)

Combustion way cleaning

Dimensions of connections

1. Outlet of heating water 2“

2. Inlet of heating water 2“

3. Draining of water from boiler

4. Chimney flap Depth of boiler L [mm] 570 670 770 970 1170

50 DLO 60 DLOType of boiler 20 DLO 30 DLO 40 DLO

Connection

Minimal distance from the wall Boiler room

� The room must be frost protected, with ambient temperature from +5°C to 35°C and relative humidity op to 90%

Connection with gas boiler

ZásobníkWater tank

Solid fuelboiler

Gas boiler

Beaver DLO

Advantages DLO boilers

cast-iron heat exchanger

draught regulator on the top of

boiler – better protected before hot

air from comb. chamber

diameter of wood log up to 18cm

the log length even at the

smallest output- 32cm

Ordering codesBoiler

Price

wood* coal* [Eur]

0020043033 20 DLO 18,0 19,0

0020043034 30 DLO 23,0 24,0

0020043035 40 DLO 29,0 32,0

0020043036 50 DLO 35,0 39,0

0020043037 60 DLO 45,0 48,0

SAP code TypeOutput

Cooling loop

Price

[Eur]

0020045876 Elbow of cooling loop - DLO

0020051111 Cooling loop - DLO

SAP code Type

*Outputs were measured with following fuel:

• black coal – granulites 30-80 mm, calorific value 26,39 MJ/kg• wood – beech, length 25cm, calorific value 15,88 MJ/kg