Alfa plam Alfa term 35 User manual

LOCAL HEATING COOKER

ALFA TERM 35

INSTRUCTION FOR INSTALLATION, SETTING, AND USE

0. TECHNICAL DATA

Note:

Heating power is given for dry beech wood used as firewood, with lower calorific value of Hd = 4255 W/kg, and

brown coal Hd = 4926 W/kg.

DEAR CUSTOMERS!

Thank you for placing your trust in us and purchasing our cooker used for local heating.

We assure you that you have chosen a cost-effective, quality product which is the result of our extensive

experience in manufacturing cookers and furnaces for local heating.

We hope that we fully met your demands in both design and the size of the living area you need to heat.

HEATING POWER WITH THE GRATE IN LOWER POSITION:

Rated heating power (wood/brown coal briquette)

32 kW / 32 kW

Heating power by radiation of heat (wood/brown coal briquette)

10 kW / 10 kW

Heating power transferred to water (wood/brown coal briquette)

22 kW / 22 kW

HEATING POWER WITH THE GRATE IN UPPER POSITION:

Rated heating power (wood/brown coal briquette)

21.6 kW / 21.6 kW

Heating power by radiation of heat (wood/brown coal briquette)

8.85 kW / 8.85 kW

Heating power transferred to water (wood/brown coal briquette)

12.75 kW/12.75 kW

REQUIRED CHIMNEY DRAFT

25 Pa

FLUE PIPE CONNECTION DIAMETER

160 mm

HEIGHT FROM THE FLOOR TO FLUE PIPE CONNECTION AXIS,

LATERALLY

685 mm

COOKER DIMENSIONS: width x height x depth [mm]

1100 x 850 x 600

OVEN DIMENSIONS: width x height x depth [mm]

460 x 260 x 440

FIREBOX DIMENSIONS:

Width

365 mm

Height (min/max)

264/510 mm

Depth

414 mm

FIREBOX DOOR OPENING (width/height)

225/215 mm

FLOW AND RETURN PIPE CONNECTIONS

R5/4RS

THERMO VALVE AND SAFETY VALVE CONNECTIONS

R1/2RU

VOLUME OF WATER IN THE BOILER

32 l

HEATING VOLUME WITH THE GRATE IN LOWER POSITION:

350-583 m3(total)

Heating volume by radiation of heat

90 –150 m3

Hot water (radiator) heating volume

260-433m3

HEATING VOLUME WITH THE GRATE IN UPPER POSITION:

216-360 m3(total)

Heating volume by radiation of heat

88 –147m3

Hot water (radiator) heating volume

128-213m3

MAXIMUM OPERATING PRESSURE

1.9 bars

MAXIMUM OPERATING TEMPERATURE

90 C

WEIGHT (gross/net)

-/211 kg

FLUE GAS TEMPERATURE (wood/coal)

305/305 C

CO CONTENT (13% O2) wood/coal

0.30 / 0.30%

ENERGY EFFICIENCY (wood/coal)

71.5 / 69.5%

1. PURPOSE

Solid fuel cooker for local heating is used for:

- cooking;

- baking;

- heating of apartments and houses;

- domestic hot water production.

It is most often used as a cooker for local heating, however, it can also be installed for central heating.

This cooker is intended for household use and may not be used for commercial purposes.

Figure 1

2. APPEARANCE AND STRUCTURE OF COOKER WITH BOILER FOR CENTRAL HEATING (Fig. 1)

Important notes before use

Cooker cover

10.

Wood box

Cooktop (hotplate)

11.

Manometer

Hotplate extension

12.

Thermometer

Butterfly handle

13.

Flue pipe connection

Oven door

14.

Opening cover

Oven thermometer

15.

Handle

Firebox door

16.

Rosette cover

Ash pan door

17.

Tertiary air regulator

Thermostat button (combustion regulator)

18.

Socle

CERTIFICATE OF COMPLIANCE

Subject: Asbestos and cadmium absence

We hereby confirm that the materials used for assembly of all our devices are

free of asbestos and asbestos derivatives and that the materials used for

welding do not contain cadmium, as prescribed by applicable norms.

Subject: CE No. 1935/2004 regulation

We hereby confirm that all the materials that come in contact with food in all

products we produce are suitable for food processing industry and are in

accordance with CE regulations.

Before installing up this cooker, please carefully read these instructions and observe all advice provided

herein.

Use only the recommended types of fuel: beech firewood, brown coal.

In the space where the firing equipment is placed, ensure there is sufficient fresh air. If the windows and

doors are sealed (made according to the energy efficiency criteria) or some other devices are also

operational, such as hearing devices, vacuum cleaners, laundry driers, fans, etc. in the space where the

cooker is being installed, the air required for combustion (fresh air) has to be introduced from outside

(Fig. 2). The air grid has to be positioned so that it cannot be blocked.

Figure 2

3. SAFETY AND RELIABILITY OF COOKER OPERATION

The cooker used for local heating is designed to ensure maximum operational safety.

Cooker operational safety is ensured by the following three elements:

- combustion regulator (thermostat) (Fig. 1, pos. 9 and Fig. 9, pos. 22), located in the ash pan door, which

automatically shuts the air supply into the firebox when the pre-set water temperature in the boiler is reached,

- Thermal release valve (thermal fuse) (Fig. 7, pos. 2 and Fig. 7a), when installed in the heating system, serves

as a thermal fuse if the cooker becomes overheated,

- safety valve (Fig. 7, pos. 5 and Fig. 8, pos. 3) which MUST be installed on an R1/2”connection (Fig. 4, pos. 4.)

NOTE:

Thermal valve and safety valve are not delivered with the cooker, while the thermostat is installed on the

cooker's ash pan door.

4. INSTALLING THE COOKER

- The stove can be installed in the kitchen or at any other appropriate place.

- The substrate under the cooker should be non-combustible.

- In the event of a combustible substrate (wood, plastics), place a metal sheet plate which should extend the

sides of the cooker by 10 cm and the front side by 50 cm.

- Furniture and objects adjacent to or in the vicinity of the cooker should not be made of combustible materials. If

they are made of combustible materials, minimum clearance to the cooker should be 20 cm on the side and 80

cm in the front.

- During the first two uses, the covers MUST NOT be lowered on the hotplate.

- If a cabinet is mounted above the cooker, minimum clearance between the cooker’s hotplate and the cabinet

should be at least 70 cm.

- Combustible materials (e.g. wallpapers, door casings, doors, etc.) require a clearance to flue pipes of at least

20 cm. This clearance can be reduced if flue pipes are thermally insulated and if the temperature of surrounding

objects does not exceed 80C.

- The cooker should be placed in a horizontal position or with its back slightly raised (3-4 mm).

5. CONNECTING TO CHIMNEY

Inspect the unpacked cooker and study the cooker parts and accessories, and in particular, make sure that:

- asbestos-free sealing wires, which ensure tight sealing and prevent uncontrolled entry of air, are fitted in

special ducts of the firebox door, ash pan, cleaning access plate and cooktop frame.

- combustion regulator (thermostat) correctly opens and closes the thermostat damper (Fig. 9, pos. 22), by using

the regulation knob (Fig. 1, pos. 9).

- grate holder (Fig. 9, pos. 20) is properly fitted on its supports and that it is easily opened.

Place the chimney connection (collar) (Fig. 1, pos. 13), which is delivered together with the cooker and placed

inside the wood box, and screw it on the outlet on the cooktop or on the side outlet. First remove the cover and

use the same screws to fasten the collar.

NOTE:

If your chimney is of unsatisfactory or dubious quality, we recommend that you attach the collar on the cooktop

outlet and not on the side outlet.

The cooker will reach its nominal heating capacity if the draft in the chimney is 25 Pa. A chimney ensuring good

draft is the basis of proper functioning of the cooker. The chimney affects not only the cooker efficiency, but also

the combustion quality. The draft in the chimney directly depends on the cross-section of the chimney, height,

roughness of the internal wall and the difference in temperature of gases and external air temperature. We

recommend the following chimney dimensions that achieve such draft:

Cooker

designati

Rated heating power

(kW)

Chimney height (m)

ALFA

TERM 35

Brown coal

briquette

wood

Clear opening dimensions (mm)

Ø200

Ø160

- Having a properly operating chimney and observing other requirements with respect to the material specified

below, ensures flawless cooker operation.

- If chimney draft exceeds 25 Pa, install a damper inside the flue pipe.

- Chimney connection should be vertically positioned.

- Horizontal pieces of flue pipes over 0.5 m long should slope upwards by 10toward the chimney.

- Flue pipe connection, flue pipes and chimney may not taper.

- All joints, including the chimney, must be well sealed and there must be no soot or dirt inside the flue pipes.

- Protect the chimney from cold (thermally insulate the chimney). This specially refers to chimneys made of

metal sheets or chimneys built on exterior walls.

- Flue pipes that are not thermally insulated and that are not placed in a vertical position may not be over 1.25 m

long.

Draft intensity is checked using a candle (Fig. 3).

Figure 3

Chimney is properly functioning, if it meets the following conditions (Fig. 4):

- If it extends the height of the rooftop (ridge, highest point) by at least 0.5 m;

- If it extends the height of the house adjacent to the chimney, tree or other barrier;

- If it is built inside house walls or, if the chimney is built on the outside walls, it must be well insulated;

- If the chimney connection is tightly connected to the chimney, if the connection is extended;

- If it is properly cleaned and free of birds’ nests, dirt, and soot;

- If the flue pipe does not enter deeply inside chimney opening, since this reduces the space for the smoke to

exit;

- If all other required openings and cleaning access plates are well shut (sealed) to prevent generation of “false”

air;

- If its duct is independent from other installation and has no cap on top.

Low draft Good draft Very strong draft

Figure 4

6. INSTALLING THE COOKER IN A WATER HEATING SYSTEM

The cooker should be installed by a professional, in accordance with appropriate design.

The cooker is intended for local and central heating.

The stove can be installed in closed or open heating circuit. Conform to the standards: JUS M.E7.201 and JUS

M.E7.202. Closed and open circuit diagrams are shown on Fig. 7 and Fig. 8.

The back of the boiler and connections are shown in Fig. 5 where:

- Position 1 is an G5/4”connection with an inner thread for flow pipe;

- Position 2 is an G5/4”connection with an inner thread for return pipe;

- Position 3 is an R1/2”connection with an inner thread for installation of the thermal release valve safety pipe;

- Position 4 is an R1/2”connection with an inner thread for safety valve installation.

Wrong Good

Wrong

Figure 5

6.1 FLOW PIPE AND RETURN PIPE (Fig. 5, pos. 1 and 2 and Fig. 7, pos. 18 and 19, Fig. 8, pos. 13 and 14)

The size of the flow pipe and return pipe outlets is 5/4”and may not be reduced or tapered before the first

branch. Use steel 5/4’’ pipe or copper pipe with external diameter Ø32mm (or larger).

While installing the system, absolutely make sure that pipe slopes are 0.5% (5 mm per one meter of pipe length)

and that the air is released from the system (from the boiler, pipes, radiators).

You can install a combination of temperature and pressure gauge on the flow pipe, although both thermometer

and pressure gauge are installed at the front of the cooker.

On the return pipe, install a pump, expansion vessel and a spigot for filling and discharging of the system. When

you install the pump, take note of the pump’s direction.

6.2 THERMAL RELEASE VALVE WITH INSTALLED THERMAL PROTECTION AND ADDITIONAL

CONNECTION ELEMENTS

For the purpose of installation of the thermal release valve, you should procure and install the following:

1. Thermal release valve with built-in thermal protection type 544, 1/2”, Caleffi product (Fig. 7a) and Fig. 7, pos.

2. Slope pressure regulator 1/2”with manometer, the same or similar as shown in Fig. 7b and Fig. 7, pos. 13.

3. Filter for cold water at the input of the water supply to the thermal valve, Fig. 7, pos. 12.

4. Filter for hot water intake of the boiler and water outlet of thermal valve, Fig. 7, pos. 14.

Note:

These components are not included with the product for local heating you purchased!

Installation of thermal release valve with built-in thermal protection (Fig. 7, pos. 2 and Fig. 7a) with additional

elements ensuring safe operation, such as pressure regulator (Fig. 7, pos. 13 and Fig. 7b), water filter on the

boiler intake (Fig. 7, pos. 12) and water filter on the boiler outlet in closed central heating system is

MANDATORY. This specially refers to a closed system, when the radiators are submerged and where in case of

termination of the pump operation for any reason, the water temperature in the boiler rapidly increases and

overheating occurs very quickly.

In the open central heating system, the installation of thermal fuse is not mandatory.

6.2 THERMAL RELEASE VALVE WITH INSTALLED THERMAL PROTECTION (Fig. 7, pos. 2 and Fig. 7a)

Thermal release valve should be installed near the cooker, depending on the available space. It can be installed

in any position. You should take into account the direction of cold water intake and hot water outflow from the

boiler which is clearly marked on the valve body.

The thermal release valve probe (Fig. 7, pos. 3) is best be placed in the thermal valve connection on the boiler

itself (Fig. 7, pos. 20). It can be placed on the discharge - distribution pipe (Fig. 7, pos. 18), but at a distance

from the boiler of 500 mm the most or at the highest point of the boiler before the exhaust pipes.

Seal it with hemp or other sealing material by tightening.

Figure 7 shows the connection diagram for the thermal release valve.

The device is made in one piece with thermal release valve and filling valve.

Valve opening temperature is 100°C (+0°C/-5°C).

The fluid recommended in the installation is water and 30% glucose antifreeze.

Note:

At reaction, i.e. valve operation, during fluid cooling in an overheated boiler, part of the new fluid is injected into

the boiler, but the part is also ejected from the boiler. It will be poured down the drain. If the antifreeze is in the

installation, you must keep in mind that a certain percentage will go out and pour down the drain!

It is recommended to use the thermal release valve Caleffi type 544, 1/2”as shown in Figure 7a.

6.2.2 SLOPE PRESSURE REGULATOR 1/2”WITH MANOMETER (Fig. 7, pos. 13 and Fig. 7b)

When installing the thermal release valve, it is mandatory to install a slope pressure regulator as shown in the

Figure 7, pos. 13. The pressure that is maintained by pressure regulator must be set at a higher pressure than

the pressure that is in the heating system. If you do not have a higher water pressure of at least 0.8 bar

compared to the pressure in the heating system, the thermal release valve will not work or cannot inject cold

water into the boiler that needs to be cooled.

Pressure regulator should be set to 2.8 to 3 bars.

You should take into account the direction of placing the slope pressure regulator!

6.2.3 WATER FILTER OF THE BOILER INTAKE (Fig. 7, pos. 12)

In front of the slope pressure regulator on water intake from water supply line it is necessary to install a filter that

will clean the water from solid objects, primarily of sand, which can damage the tap seal or seals of the thermal

valve and the slope pressure regulator.

This filter does not need to be resistant to high water temperatures due to the fact that cold water flows through.

6.2.4 WATER FILTER OF THE BOILER OUTLET (Fig. 7, pos. 14)

It is required to install the filter on the boiler outlet which will clean the hot water from dirt and solid objects that

can damage the tap seals, or seals of the thermal release valve. This filter must be resistant to water

temperatures up to 150°C.

NOTES:

- After the completion of thermal release valve activation and filling the system with cold water, checking the

pressure in the installation is mandatory!

- In cases where antifreeze is used, after filling the installation with water it is required to check the percentage

content of antifreeze in a mixture of water and antifreeze!

- To avoid elimination of the antifreeze agent from the installation, it is best to have backup battery supply of the

pump with an inverter.

6.3 SAFETY VALVE (Fig. 7, pos. 5, Fig. 8, pos. 3 and Fig. 5, pos. 4)

An R1/2”connection (Fig. 5, pos. 4) is welded at the back of the boiler, under the cooktop frame, on which a

safety valve MUST be fitted. The safety valve should be set at 2.5 to 3 bars. You can fit it directly on the

connection or at a distance from the connection of at least 1 m, provided that there is no block valve between the

boiler and the safety valve.

In general, safety valve is not fitted in open circuits, but we advise you to fit it nonetheless, as another safety

precaution for the boiler and the system (in case of emergency).

NOTE:

If the safety valve is not fitted as described above, the warranty will not be valid.

6.4 MANOMETER AND THERMOMETER (Fig.1 pos.11 and 12 and Fig.6)

Thermometer and pressure gauge are installed on the cooker, on the rosette cover (Fig. 1, pos. 16) between the

firebox door and the oven door (Fig. 1, pos. 12 and 11, and Fig. 6) and therefore it is not necessary to install

them.

Thermometer, pos. 12, shows the temperature of water in the boiler (operating temperature) in ºC.

Manometer pos. 11, shows the pressure of water in the boiler or the system in bars.

Figure 6 (pos. 11 –manometer, pos.12 –thermometer)

7. PRACTICAL INSTRUCTIONS AND HEATING SYSTEM OPERATION ADVICE

- We recommend you to use a closed circuit, due to corrosion hazard related to open circuits.

- All connections must be well sealed and tightened.

- Before commissioning, the entire system needs to be tested with water at 2.4 bar pressure.

- It is recommended to discharge the water from the system at least once, to empty the system of dirt.

- For a system to which only the “Alfa term 35”cooker is connected, we recommend an expansion vessel of 30

(l) and not less than 25 (l), which should be fitted on the return pipe, as close to the boiler as possible, and no

block valves can be fitted between the boiler and expansion vessel.

INSTALLATION DIAGRAM OF CLOSED CIRCUIT SYSTEM COOKER FOR LOCAL HEATING ALFA TERM

Figure 7

1. Hot water boiler

2. Thermal release valve

3. Thermal release valve probe

4. Automatic air release cup

5. Safety valve

6. Hydraulic switch

7. Circulation pump

8. Non-return valve

9. Expansion vessel

10. Three-way valve with attached thermostat

11. Floor heating collector

12. Cold water filter

13. Slope pressure regulator with pressure gauge

14. Hot water filter

15. Spigot for filling and discharging

16. Valve

17. Thermomanometer

18. Flow - distribution line

19. Return pipe

20. Connection for thermal valve

Figure 7a Figure 7b

INSTALLATION DIAGRAM OF OPEN CIRCUIT SYSTEM COOKER FOR LOCAL HEATING ALFA TERM

Figure 8

1. Hot water boiler

2. Automatic air release cup

3. Safety valve

4. Hydraulic switch

5. Circulation pump

6. Non-return valve

7. Three-way valve with attached thermostat

8. Floor heating collector

9. Open expansion vessel

10. Valve

11. Spigot for filling and discharging

12. Termomanometar

13. Flow - distribution line

14. Return pipe

15. Thermostat connection

- It is preferable to install a 5/4”multistage pump with a flow rate capacity that always meets current system

needs. Install block valves immediately downstream and upstream of the pump to enable removal of pump for

repairs, replacement etc. without discharging the water from the system.

-Install the spigot used for filling and discharging the system on the return line at the lowest point of the system.

- Prior to commissioning, fill the system with water as follows:

a) for open circuits, fill the system using the spigot for filling and discharging, until the water starts to leak

from the expansion vessel’s overflow pipe;

b) for closed circuits, system pressure (operating pressure) should be 1 1.5 bar.

In both cases, slowly fill the system so that the air can escape through air release valves. If the valves are not

opened automatically, open them manually until water starts to leak, and then close them.

- Do not discharge water from the heating system even during summer, because it protects the inside of the

system from oxidation (corrosion).

- If you will not use the boiler for a longer period during winter and no antifreeze mixture is poured into the

system, it is best if you discharge water from the system. While discharging the system, open the radiator

valves, air release valves and other system blocking elements.

- You may not light a fire if water in the boiler is frozen or if there is not enough water in the boiler.

8. COMMISSIONING AND LIGHTING THE FIRE

Before you light the fire for the first time, the entire local (central) heating system should be filled with water and

well bled, and the cooker should be properly connected to the chimney, as described above.

NOTE:

The cooker may not be used without water. It must be connected to the system, which is connected to

consumers (radiators) with the power of no less than 21 KW.

When the system is cold, power regulator (combustion regulator, thermostat) damper (Fig. 9, pos. 22) located on

the ash pan door (Fig. 1, pos. 8) should be open (knob Fig.1,pos. 9 turned to max). The button of the butterfly

handle (Fig. 1 and Fig. 13, pos. 4) should be pulled out and the rosette button for heating-baking (Fig. 13, pos.

19) should be turned to the left to position “1”using a key (Fig.13,b). The butterfly and rosette for heating-baking

opened in this way allow starting of fire. Later, when the fire in the cooker is burning, set the regulator damper to

the corresponding position depending of the chimney draught and desired power, leave the butterfly handle

button pulled out, and turn the rosette button for heating-baking to the right to position “0”(Fig. 13a) and pos. 19)

using a key. When the butterfly and rosette are positioned like this, the optimal utilisation of fuel is ensured and

thus better heating as well. During this process, fire box and ash pan door (Fig. 1, pos. 7 and 8) must be closed,

if you need controlled burning. Fire lighting butterfly and rosette for heating-baking are opened only while the fire

is being lit (10 to 15 minutes).

Note: after starting the fire using the key (Fig. 17), lower the cooker covers to increase the heat

transferred to the radiators and to reduce the heat radiated in the room. Cooker covers are thermally

insulated.

Use gloves during opening the firebox door for safety reasons. The glove is provided with the product. The

cooker is stoked as any other solid fuel cooker. Start the fire through open ash pan holder and grate holder (Fig.

9, pos. 20 and Fig. 10). The grate holder (Fig. 9, pos. 20 and Fig. 10) is opened by lifting and pulling. When the

fire starts burning, you may load wood or coal, but do not fill the firebox at once. Instead, divide the fuel

necessary to fill the firebox in two or three portions and load them into the firebox in 10 15 minute intervals. A

cooker loaded in such way can burn for 1 to 6 hours, depending on combustion strength in the cooker or on the

regulator (thermostat) setting.

It is not recommended to burn organic or other waste in the stove (plastic bags, bones, etc.) because this

causes formation of tar deposits on the flue duct walls, which can cause a fire.

Each time you load the fuel, we recommend that you let the fire burn at maximum strength for at least half an

hour, because the first to burn out are all the volatile constituents of the fuel that are usually the main causes of

condensate formation in the cooker.

After plenty of hot fragments have formed, load the portions of coal in two or three steps at 15 minute intervals.

9. USING THE GRATE IN THE UPPER AND LOWER POSITION

For cooking, baking and heating during transitional season, the grate is in upper position (Fig. 11) to ensure that

the flame directly reaches the cooktop and saves cooking, baking and heating costs.

The cooker is delivered with the grate in the lower position. To move the grate from lower to upper position, take

the following steps:

- Remove the cooktop from the cooker and open the firebox and ash pan door.

- Use your hand, through the ash pan opening and ash pan, to lift the front of the grate and pull it out of its

holder.

Place the grate on the supports (4 pcs) welded inside the boiler firebox, at the front and in the back (2 + 2 pcs).

Place the grate at an angle (slanted) so that the back of the grate can be fitted first, and then lower the front of

the grate. Put the hotplate back on the frame.

- The grate is placed in the lower position (Fig. 9 and 10) the same way as it is placed in the upper position.

Notes:

- Grate in the lower position enables better heating of water, heating more radiators and larger living areas, but

cooking is more difficult.

- When the grate is in the upper position, water is less heated, fewer radiators and smaller living area can be

heated, but cooking is much easier.

- Baking is the same in both positions of the grate.

10. AUTOMATIC REGULATION

Cooker power is adjusted using the thermostat (combustion power regulator), which is located in the ash pan

door and which automatically sets the regulator damper (Fig. 9, pos. 22) depending on the regulation knob

setting (Fig. 1, pos. 9 and Fig. 12) and the temperature of water in the boiler. The signs ‘’+’’ and ‘’–‘’ are written

Figure 09

Figure 11

Figure 10

Figure 12

on the regulation knob. The cooker power is regulated by turning the knob ‘’+’’ to increase and the knob ‘’-‘’ to

reduce the power.

In the power regulation system, air regulator (damper) fully controls combustion air supply if other openings are

closed.

Figure 13

11. SECONDARY AND TERTIARY AIR REGULATORS

Secondary air regulator is placed in the firebox door (Fig. 15). It controls additional lighting of fire and burning of

unburned flue gases. The secondary air is adjusted using the lever on the internal side of the firebox door. On

the internal side of the firebox door, there is a clear marking 0-1. If the lever is moved in 0 direction, the quantity

of the secondary air is decreased, while it is increased if the lever is moved in 1 direction.

Leave the secondary air regulator open when the fire in the cooker is lit.

Behind the rosette cover, there is a tertiary air regulator (Fig. 1, pos. 17). It controls additional lighting of fire and

burning of unburned flue gases. The opening and closing of the rosette cover is done using the lever located

between the lower part of the rosette cover (Fig. 1, pos. 16) and opening cover (Fig. 1, pos. 14). . The signs ‘’+’’

and ‘’–‘’ are written on the lever. By turning the lever ‘’+’’ you increase tertiary air,by turning it at ‘’-‘’ you can

reduce the air.

Leave the tertiary air regulator open when the fire in the stove is lit.

12. COOKING, BAKING, AND FRYING

During heating season, the cooker is used mainly for heating. For faster baking, cooking and frying, use only dry

firewood.

While baking, the butterfly (Fig. 1, pos. 4) for fire starting has to be closed, the rosette button for heating-baking

has to be in position “1”(Fig. 13, pos. 19), power regulator has to be open and the stove covers have to be

raised using the key (Fig. 18). After you finish baking, cooking or frying, place the power regulator in desired

position and the rosette button for heating-baking to position “0”.

While baking, increase the temperature of the water in the system to at least 60C and, if necessary, close some

of the radiators during baking and adjust the oven temperature to the food being prepared.

13. FUEL

Fuel can be stored in the fuel box (Fig. 17). The fuel box is moved on guides. If you want to take the fuel box out

of the cooker, you must lift it to remove it from the guides.

Use the fuel specified in Table 1 to ensure the nominal heating capacity of the boiler at chimney draft of 25 mbar

(25 Pa).

Do not burn coal dust, sawdust, or waste that generates large quantities of smoke!

Figure 15

Figure 16 Figure 17 Figure 18

Table 1

Fuel

Heating power (kJ/kg.)

Brown coal

15000 - 19000

Dry beech firewood

15300

NOTE:

To ensure the nominal heating capacity and maximum yield, we recommend you burn dry beech wood

cut at the length of L = 33 cm.

14. CLEANING AND MAINTENANCE

Each time before loading the fuel, clean the grate using a small shovel by opening the grate holder or through

open firebox door. Remove the ashes from the ash pan at least once a day and remove larger residues (cinder)

by opening the ash pan door and fire holder. All surfaces of the cooker that are in contact with flue gases must

be regularly maintained and cleaned using a small shovel. Clean heating areas guarantee cost-effective cooker

operation. It is recommended to clean the cooker once a month or more often, if necessary.

Do not clean enamelled surfaces and stove frame using wire brush or wire sponge, because it could damage the

enamel and safety lining, but use wet cloth, cleaning agents, and mild detergent instead. Clean the oven after

each use while still hot. After cleaning, leave the oven door open for a few minutes to prevent bad odours the

next time you heat the oven.

Clean the hotplate occasionally using fine sandpaper, and in the event of longer breaks, apply acid-free oil on

the hotplate (vegetable oil). Remove burnt material from the cooktop with a spatula, knife or treat it with graphite,

ashes from the ash pan or oil.

It is prohibited to cool down the stove by making artificial draft or by using water to cool down the firebox.

15. CONSERVING THE COOKER

At the end of the heating season, clean the cooker from ashes and soot. Discharge the water only if any repairs

need to be carried out on the installation. If the system is not used during heating season, poor a certain amount

of antifreeze liquid into the system or discharge the water to prevent freezing.

16. TROUBLESHOOTING

Table 2

No.

Problem

Possible cause

Repair

Water pressure in the system

dropping slowly.

Installation is not sealed.

Check whether all welded connections,

threaded connections, unions etc. are

sealed.

Radiators are cold at system’s

maximum height and a low

sound is heard.

Air in the system and small

pressure in the system.

Increase system pressure and bleed the

air from the system and radiators.

Radiators are not heated along

their entire length.

Air in the radiators.

Bleed the air from the radiators using

release valve.

Safety valve is leaking water from

the system and the pressure is

below 3 (2.5) bar.

Safety valve is

malfunctional

Replace the safety valve

Pressure in the system is over 3

(2.5) bar and safety valve is not

discharging water from the

system.

Safety valve is

malfunctional

Replace the safety valve

Sudden water temperature rise in

the system.

Air in the installations

Bleed the air from the radiators.

Valves toward radiators are

shut

Open all valves in the heating system and

enable normal water circulation in the

system.

Circulation pump failure.

Repair or replace the circulation pump to

enable heating system operation.

Power outage.

Open all valves that reduced the heating

system. This relates primarily to the valve

in by-pass.

Stop making fire or make less fire and

carefully monitor the water temperature in

the system so that the water temperature

does not exceed 90C when the power is

back on.

Ensure back-up battery supply with

converter.

Sudden water pressure rise in

the system due to water

temperature increase.

Reduced expansion vessel

pressure or vessel is

completely empty. Remove

the cover or vessel valve

cap and release some air

through the valve. If the

membrane is damaged,

water would leak, and if the

vessel is half empty, only

the air would come out.

If water is leaking from the valve, replace

the expansion vessel.

If only air is coming out from the valve,

remove the vessel from the system and

apply additional pumping. Vessel

pressure should be equal to or higher

than the height difference between the

highest and lowest point of the system.

Example:

For a 5 m height difference, the pressure

equals Pmin 0.5 bar.

Air in the installations

Release air from the system.

Circulation pump does not

activate or it trips the switch

No power at electrical

connection.

Connectors are loose.

Check and tighten all screws at

connection points. Check and, if

necessary, replace the switches, fix motor

connection or installation connection

problems.

Faulty capacitor.

Replace capacitor

Rotor blocked

Each time you start heating, check

whether the rotor turns easily. Hot water

deposits can cause the rotor to block.

Turn the motor axis left and right using a

screw gun until the rotor can move freely.

The pump is blocked due

to deposits.

Dismantle and clean the pump.

Thermometer or pressure gauge

does not display system

temperature or water pressure.

Faulty thermometer or

pressure gauge.

Replace thermometer or pressure gauge

Noise coming from the heating

system

Pump is malfunctional.

Large clearance between

the rotor axis and nut.

Reduce pump speed. Replace pump nuts

or the entire pump.

Pump speed is too high.

Lower the speed.

Air in the installations

Bleed the air from the heating system.

Loose knobs or screws on

the cooker.

Tighten the knobs and screws

Noise inside the pump.

Pressure too low at suction

part of the pump.

Increase system pressure or check the

expansion vessel.

The cooker overheats, loud noise

(cracking) is heard in the boiler of

the cooker

Electricity outage has

occurred, the circulation

pump does not work and

the boiler of the stove

overheats. There is a

danger of boiler rupture.

To avoid this, it is best to have backup

battery power supply for the circulation

pump with an inverter.

It is best to have a release thermal valve

installed (fig. 6, pos. 2) as additional

safety measure from cooker overheating.

If you do not have backup supply of the

circulation pump or a thermal release

valve installed, then you should open the

bypass valve connected in parallel with

the circulation pump on the pipeline

system and remove embers from the

cooker.

The cooling thermal valve is

activated (thermal release valve)

because water temperature has

exceeded 95C due to:

- no electricity

This is as it should be and do not touch

anything. When the system is cold,

thermal valve will be closed.

After that, check the pressure in the

installation and fill the system to the

required.

- open ash pan door and

no controlled combustion

Close the ash pan door and reduce

system water temperature using the knob

on the ash pan door and thermostat.

- grate in lower position

and not many radiators are

open

Switch the grate to upper position or open

more radiators. Keep ash pan door

closed.

Water condensation in the boiler.

Fuel is wet.

Replace fuel

Return water temperature

is too low.

Install mixer valve or turn a radiator off.

Outlet water temperature not

right (too low)

Low calorific value of fuel.

Change fuel.

Heating system is too large

(too many radiators)

Turn off some radiators.

Not enough fuel has been

loaded in the firebox.

Increase the quantity of fuel in the firebox.

Fire is not burning regularly

Low chimney draft.

Build a new chimney or repair the old one.

Connecting flue pipes are

not sealed.

Cooker and chimney door

are not sealed. Chimney

draws “false air”.

Seal all joints to prevent occurrence of

“false air”.

Not enough heat during baking,

cooking

Thermostat set to lower

temperature.

Increase water temperature using the

thermostat or briefly open the ash pan

door.

Too much heat

during baking, cooking

Thermostat set to high

temperature.

Reduce water temperature using the

thermostat or burn a smaller fire.

Smoke coming from the boiler-

cooker

during start-up

Slight burning and heating

of chimney and cooker.

It is normal for the cooker to smoke a little

during first use and it stops after a while.

Boiler-cooker is smoking during

regular use.

Chimney, flue pipes and

cooker not cleaned.

Clean the inside of the chimney, flue

pipes and cooker.

Fuel is wet or you are using

fuel that is generating a lot

of smoke.

Change the fuel. Use dry fuel or

smokeless fuel.

Firebox is overloaded.

Load the firebox slowly, gradually, in

several steps

Poor chimney quality

Repair your chimney or build a new one.

Grate is stuck during shaking.

A nail, cinder or other

material is stuck on the

grate.

Clean the grate of unwanted objects.

17.0. THE PERIOD OF GUARANTEED SERVICE

This implies the period during which we guarantee the service, tools and spare parts, starting with the date of

purchase of the device.

The duration of the guaranteed service is in accordance with the applicable laws and regulations.

In case of change of model and design of the device, the deadline for replacement of parts that changed the

design is within the legal deadline.

After this period, we provide the modified parts with new designs.

17.1. WARRANTY CONDITIONS

Product warranty is valid during the period prescribed by the law.

The guarantee is not valid for the glass, the glass-ceramic panel and the physical damage that have

occurred after purchase.

THE MANUFACTURER RESERVES THE RIGHT TO MAKE ANY CHANGES.

The device under warranty will function properly only if used in accordance with these instructions for installation

and use.

The warranty expires if it is established that:

- Connecting the product or repair performed by an unauthorised person, or if non-original parts were used;

- if the device was not used properly in accordance with this instruction;

- if a mechanical damage occurred during the use of the device;

- if the repairs were performed by an unauthorised person;

- if the device was used for commercial purposes;

- If the damage occurred during transport after the sale of the device;

- If the failure was due to improper installation, improper maintenance, or mechanical damage caused by the

customer;

- if the malfunction was the result of too high or too high voltage, as well as of force majeure.

Defects on the device may be removed even after the expiration of the warranty using the original replacement

parts for which we also provide a warrantee under the same conditions.

This guarantee does not exclude or affect the rights of the customer in regard to the conformity of the goods

pursuant to the legal regulations. If the delivered product does not conform to the agreement, the customer has

the right to ask the seller to repair such lack of conformity without any reimbursement, by repair or replacement

of the product in accordance with the valid legal regulations.

CONTENTS:

0. TECHNICAL DATA......................................................................................................................................2

1. PURPOSE.....................................................................................................................................................3

2. APPEARANCE AND STRUCTURE OF COOKER WITH BOILER FOR CENTRAL HEATING

(Fig. 1)................................................................................................................................................................3

Figure 2..............................................................................................................................................................4

3. SAFETY AND RELIABILITY OF COOKER OPERATION.....................................................................4

4. INSTALLING THE COOKER .....................................................................................................................4

5. CONNECTING TO CHIMNEY...................................................................................................................4

6. INSTALLING THE COOKER IN A WATER HEATING SYSTEM ........................................................6

6.1 FLOW PIPE AND RETURN PIPE (Fig. 5, pos. 1 and 2 and Fig. 7, pos. 18 and 19, Fig. 8,

pos. 13 and 14).............................................................................................................................................7

6.2 THERMAL RELEASE VALVE WITH INSTALLED THERMAL PROTECTION AND

ADDITIONAL CONNECTION ELEMENTS..............................................................................................7

6.2 THERMAL RELEASE VALVE WITH INSTALLED THERMAL PROTECTION (Fig. 7, pos. 2

and Fig. 7a) ...................................................................................................................................................7

6.3 SAFETY VALVE (Fig. 7, pos. 5, Fig. 8, pos. 3 and Fig. 5, pos. 4)................................................8

6.4 MANOMETER AND THERMOMETER (Fig.1 pos.11 and 12 and Fig.6) .....................................8

7. PRACTICAL INSTRUCTIONS AND HEATING SYSTEM OPERATION ADVICE............................8

8. COMMISSIONING AND LIGHTING THE FIRE....................................................................................10

9. USING THE GRATE IN THE UPPER AND LOWER POSITION.......................................................11

10. AUTOMATIC REGULATION .................................................................................................................11

11. SECONDARY AND TERTIARY AIR REGULATORS........................................................................12

12. COOKING, BAKING AND FRYING......................................................................................................12

13. FUEL..........................................................................................................................................................12

14. CLEANING AND MAINTENANCE........................................................................................................13

15. CONSERVING THE COOKER..............................................................................................................13

16. TROUBLESHOOTING............................................................................................................................13