Astra G-50 Installation And Operation Manual

Page 1

HEATING BOILER

Astra G-50

ASTRA MACHINERY PLANT AB • ANNO 1929

CONTACT INFORMATION OF THE FACTORY: MACHINERY PLANT “ASTRA” AB ULONŲ G. 33, LT62161 ALYTUS, LITHUANIA TEL.: +370 315 75449 FAX: +370 315 52265 EMAIL: INFOASTRA.LT WWW.ASTRAGAS.LT

INSTALLATION AND OPERATION MANUAL

Page 2

TABLE OF CONTENTS

1. SAFETY REQUIREMENTS .................................................................................. 3

2. TECHNICAL DESCRIPTION ................................................................................ 4

• General View of the Boiler ................................................................................................................... 4

• Technical Data of the Boiler ................................................................................................................. 5

• Ceramic Elements of the Boiler ............................................................................................................ 6

• Turbulence Plates ................................................................................................................................ 6

3. INTENDED USE ............................................................................................... 7

4. TRANSPORTATION, STORAGE, UNPACKING ........................................................ 7

5. INSTALLATION ............................................................................................... 8

• Accumulation Tank .............................................................................................................................. 8

• Description of the Emergency Cooling System Diagram .......................................................................8

• Description of the House Heating System Scheme ...............................................................................8

• Requirements for Connection of the Boiler to the Heating System .................................................... 10

• Circuit Diagram of the Boiler .............................................................................................................. 11

• Connection of the Circulation Pump .................................................................................................. 12

• Connection of the Ventilator ..............................................................................................................12

• Mounting of the Draught Regulator .................................................................................................. 12

• Regulation of the Secondary Air Damper ........................................................................................... 13

• Controlling the Temperature of Water Returning to the Boiler ........................................................... 13

• Heating Output, Water Temperature and Water Flow Relationship .................................................... 13

• Installation of the Boiler Room .......................................................................................................... 14

• Requirements for the Chimney .......................................................................................................... 14

6. FUEL ...........................................................................................................15

7. OPERATION ..................................................................................................16

• Front Control Panel ........................................................................................................................... 16

• Rear Control Panel ............................................................................................................................. 17

• Preparation for Firing ........................................................................................................................ 17

• Kindling Procedure of the Boiler ........................................................................................................ 17

• Fire Bed and Tips for Eective Boiler Stoking ..................................................................................... 18

• Regulation of the Boiler Temperature ................................................................................................ 19

• Addition of Fuel ................................................................................................................................. 19

• Combustion Control .......................................................................................................................... 19

• Cleaning the Boiler ............................................................................................................................ 19

• Emergency Shut Down of the Boiler .................................................................................................. 20

8. POSSIBLE FAULTS..........................................................................................20

9. WARRANTY AND ITS VALIDITY TERMS ..............................................................21

10. ACCEPTANCE CERTIFICATE .............................................................................22

SELLING CARD .................................................................................................22

BOILER INSTALLATION PROTOCOL .......................................................................22

WARRANTY AND POST-WARRANTY REPAIR CARD ..................................................23

DECLARATION OF CONFORMITY .......................................................................... 24

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INSTALLATION AND OPER ATION MANUAL

This user manual was compiled following the requirements of EN 12171 “Heating systems in buildings. Procedure for the

preparation of documents for operation, maintenance and use. Heating systems not requiring a trained operator”.

1. SAFETY REQUIREMENTS

1.1. The room where the boiler is to be installed should be ventilated.

1.2. Free inow of air into the room should be ensured.

1.3. The boiler ue connection with the chimney should be tight. Do not heat up the boiler with leaking ue connections!

1.4. The boiler should be installed in a closed heating system with a closed (membranous) expansion vessel, the volume of which should be no less than 10% of the total volume of the heating system (including the boiler) (the volume of the expansion vessel can be calculated according to the standard EN 12828 annex D).

1.5. A safety valve for no more than 3 bar response pressure should be tted onto the boiler in the heating system (please see Chapter 5, “Requirements for connection of the boiler to the heating system”).

1.6. Remove the accumulated soot and resin from the boiler ues, as instructed in this manual.

1.7. The room where the boiler is installed should have re-extinguishing tools: re extinguishers, sand box, shovel and other tools.

1.8. Do not place ammable materials on or near the boiler.

1.9. Connect the boiler to the electric system only via a three-pole plug plugged into an adequate three-pole socket with earthing. Protect connection cable from damages.

1.10. Observe operation of temperature control devices and gauge readings when operating the boiler. In case of faulty operation of the boiler, stop operation and remove the fault.

1.11. Kindle the boiler and put the rewood into the boiler only as indicated in Chapter 7 of this manual.

1.12. Keep children away from the boiler! The boiler can be serviced only by adults.

1.13. Before kindling the boiler, check if the heating system is lled with water and deaerated.

1.14. The operating pressure in the heating system should not exceed 3 bar.

1.15. The electrical connections are factory tested and the following parameters were conrmed:

• integrity of the protective circuit – electrical resistance of the protective circuit does not exceed 0.1;

• resistance of the electrical insulation – at least 1.0 M;

• resistance of electrical insulation was checked at 50 Hz, 1 000 V voltage.

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HEATING BOILER: Astra G-50

2. TECHNICAL DESCRIPTION

• GENERAL VIEW OF THE BOILER

Fig. 1 General view of the boiler

A – front view; B – rear view; C – top view; D - section.

1. Front control panel; 2. Rooftop cover; 3. Handle of the upper ue damper; 4. Door of the fuel chamber; 5. Adjustable support legs; 6. Flow water pipe;

7. Rear control panel; 8. Sensor immersion pocket ½” of the safety temperature limiter 95°C valve; 9. Secondary air regulation damper; 10. Ventilator and ventilator duct inspection aperture; 11. Return water pipe; 12. Water drain nipple; 13. Connections of the cooling serpentine; 14. Flue pipe; 15. Flue cleaning cap; 17. Safety ventilator shutdown 95°C thermostat sensor; 18. Water temperature sensor; 19. Upper combustion chamber opening to the ue; 20. Primary air inlet nozzle; 21. Secondary air inlet opening; 22. Ceramic burner; 23. Ceramic chopper; 24. Ceramic segment; 25. Opening to the ue.

Astra G boiler model B L H h k D d N S Astra G-50 660 1230 1315 1075 150 152 G1 1/2“ 210 180

19 20

C D

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INSTALLATION AND OPER ATION MANUAL

• TECHNICAL DATA OF THE BOILER

Name of indicator

Indicator value

Astra G-50

Nominal heat output, kW 50 Class of boiler according to EN 303-5 3 Class of protection against electric impact 1 Eciency rate,% 81-89 Power of emergency cooling system, kW 20 Water volume in the boiler, l 115 Setting range of the temperature regulator, °C 65-85 Recommended draught, Pa 25 Working pressure of water in the system, bar, max. 3,0 Testing pressure of the boiler, bar 4,5 Max. allowable water temperature in the boiler, °C 108 Max. allowable operating water temperature in the boiler, °C 95

Electric characteristics:

voltage, V / frequency, Hz 220/50 average power used, W 50

Level of electric protection of the boiler IP30

Dimensions:

height, mm 1315 width, mm 660

depth, mm 1230 Weight of boiler, kg, 505 Threaded connection diameter 1

/2" Volume of fuel chamber, l 230 Dimensions of the loading aperture, mm 350x285 Flue gas duct diameter, mm 152 Length of wood pieces, mm 750 Average temperature of the ue gases at the nominal heat output, °C 205

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HEATING BOILER: Astra G-50

• TURBULENCE PLATES

Turbulence plates – a technology invented and patented by “Astra” engineers, used for capturing more heat from the hot exhaust smoke. It forces the exhaust smoke to hold, become turbulent and thus transfer more heat to the adjacent heat exchanger. The core of the device consists of the turbulence plates, positioned at an angle in the rectangularshaped ue channel of the boiler. The inspection aperture 1 is installed on the top part of the ue channel (Fig. 3), covered with a screw-on cover with a gasket. This aperture is used for cleaning the ue channel and placing/removing the turbulence plates. The turbulence plates 2, shown in Fig. 3, maintain their position in the ue due to their force of gravity alone. They are inserted into the ue channel or removed using a poker 3, which is provided with the boiler. Poker 3 (Fig. 3) is bent at an angle of approximately 80° to the handle, so that the hooked plate does not slide o. In order to be able to hook the turbulence plate 2 with a poker, a hole has been made in its upper part for hooking with a poker. The plate rests upon the heat exchanger 4 of the boiler ue on four supports: two bottom and two upper supports. When inserting the plate 2 with a poker 3 into the ue channel, rst the lower position is found, and after slightly loosening the poker, yet without removing it from the hole, the plate is allowed to descent onto the opposite side of the heat exchanger due to the force of gravity until it touches the wall of the heat exchanger with its upper supports. Then the tool can be removed and the next plate can be installed in a similar way.

Turbulence plates decrease the temperature of the exhaust smoke. The boiler can be operated without the plates, but then greater losses of heat through the chimney will occur.

Fig. 3 Turbulence plate technology

1. Inspection aperture; 2. Turbulence plates; 3. Poker;

4. Heat exchanger of the boiler ue.

• CERAMIC ELEMENTS OF THE BOILER

The boiler has ceramic elements of three types: ceramic burner 1, ceramic chopper 2 and two ceramic segments 3 (Fig. 2). The chopper 2 must be moved to the back wall of the boiler chamber during operation of the boiler, segments 3 – resting upon the front edge of the chopper. If needed, the ceramic burner 1 can be removed. For this purpose, use a screwdriver to remove the sealing rope from between the ceramic burner and the frame of the boiler, then this ceramic insert can be removed.

Fig.2 Ceramic inserts and their positions

1. Ceramic burner; 2. Ceramic chopper; 3. Ceramic segments.

Ceramic element

Boiler type

G-50

1. Burner

1 a ŠK-50.00.008 1 1 b ŠK-50.07.001 1

2. Chopper

2 a G-32.01 2 2 b G-32.02 1

3. Segments

3 G-18.00.004-01 2

2 b

2 a

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INSTALLATION AND OPER ATION MANUAL

3. INTENDED USE

The heating boiler is designed for the heating of residential and public buildings, manufacturing shops and other buildings where a closed heating system has been installed. Control and regulation devices are installed in the boiler, which automatically maintain the set water temperature, ensure economically ecient usage of the boiler and safe operation.

Boilers of this type are designed to burn wood, partially generating gases. Gas is extricated (generated) from the burning rewood in the upper combustion chamber of the boiler and burned in the lower chamber. The intensity of gas generation and combustion is regulated by the frequency and duration of air inow into the combustion chambers.

Advantages of the boiler are the following:

• gas generating combustion ensures eective burning of wood and a high eciency coecient since the burning process takes place at a high temperature of 900°C;

• the heat output of the boiler can be regulated within the range of 40-100%. The boiler is automatically controlled using an electronic regulator, by switching the ventilator inowing into the combustion chambers o or on, or by regulating the speed of its rotation;

• the combustion period of one fuel load is long due to the large volume of the fuel chamber;

• complete fuel combustion ensures cost-ecient fuel usage;

• the turbulence plates installed in the ue of the boiler enhance heat exchange in the boiler and reduce the temperature of the smoke in the chimney;

• it is sucient to remove the ashes 1-2 times per week.

4. TRANSPORTATION, STORAGE, UNPACKING

The heating boiler is to be transported and packaged in accordance with the documentation of the manufacturer, protected from precipitation and dust. It can be transported only in vertical position, fastened to avoid sliding and falling. If the boiler is transported in other than vertical position, decorative surfaces may be damaged, cladding battered, control and regulation equipment broken, built-in ceramic inserts may fall down and splinter. The heating boiler should be carefully loaded, unloaded and transported, without any signicant impact.

The boiler should also be stored in a vertical position. It is not allowed to put one boiler on top of another, as a packaging frame is not designed for this purpose. The boiler should be stored in a closed room protected from precipitation. The air humidity of the room should not exceed 80%, in order to avoid condensate forming on the surfaces of the boiler. Storage temperature may vary from -40°C to +60°C.

If the boiler was transported or stored in minus temperatures, then before it is kindled, it should be kept in plus temperature for no less than 2 hours.

After the heating boiler is delivered to the site, take o the packing frame and polyethylene lm, unscrew boiler bolts and, fastening to the packaging base, remove the boiler from the packaging base.

Open the doors of the boiler and check if all elements listed in a delivery kit are included.

The delivery kit consists of the following: boiler - 1 pc.; poker - 1 pc.; scraper - 1 pc.; draught regulator - 1 pc.; tee - 1 pc.; ventilator- 1 pc.; operation manual - 1 pc.; support legs - 4 pcs.

Check if painted surfaces have not been damaged during transportation, if the components are not bent and if control and regulation equipment is intact. In case you notice any inadequacies, present your claims to the vendor company.

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HEATING BOILER: Astra G-50

5. INSTALLATION

• ACCUMULATION TANK

These solid fuel boilers are intended to be fully loaded during the operation; the most ecient mode of their exploitation is at the nominal or maximum heat output. It is advisable to install an accumulation tank of sucient size in their proximity, which could accumulate the excessive heat. If the boiler is operated without the accumulation tank, its lifetime can be shortened because, in such a case, a relatively low temperature of the outowing water is maintained in the boiler (65-70°C). Therefore, the temperature of the water returning to the boiler from the heating system is as low as 55-60°C. More water vapour condenses in the boiler at such operating temperatures, more tar accumulates on the internal walls of the boiler and metal corrosion intensies. When operating the boiler with an accumulation tank, it is possible and advisable to maintain constantly maximum temperature of outowing and returning water, respectively 85°C and 72°C, then condensation of water vapour and metal corrosion will be signicantly lower. Recommended capacity of the accumulation tank is approximately 50 litres per 1 kW of nominal power of boiler:

Boiler model Astra G-50 Required volume of the accumulation tank, litres 2500

The boiler is to be operated only with an emergency cooling system installed!

• DESCRIPTION OF THE EMERGENCY COOLING SYSTEM DIAGRAM

A thermostatic safety temperature limiter 95°C valve (Fig. 4) protects the boiler form the overheating. If the water temperature in the boiler exceeds 95°C, the valve automatically opens the ow of cold water from the public water supply network through the cooling serpentine, where it absorbs the excessive heat energy and ows out into the sewage. The sensor of the valve with the external thread ½” is screwed onto the socket on the rear wall of the boiler.

Technical data of the thermostatic safety valve are the following: Opening temperature - 95°C; Maximum operating temperature- 110°C; Operating pressure - 10 bar; Bulb of the sensor - L=142 mm, external thread ½“.

The emergency cooling system protecting the boiler from overheating cannot be used for heating domestic water.

• DESCRIPTION OF THE HOUSE HEATING SYSTEM SCHEME

The house heating system with an accumulation tank could be

divided functionally into two circles: heat production and heat

consumption. Both circles operate independently and interact in the accumulation tank. The heat production circle consists of a boiler, Laddomat 21 thermostatic mixing unit with a circulation pump installed in it, expansion vessel, ttings and accumulation tank. The intended use of this circle is to charge the accumulation tank only. To charge the tank, the boiler could operate on its maximum heat output and outowing water temperature 85°C. That mode of boiler operation is optimal for the boiler and combustion process itself.

2 3

1. Į kanalizaciją;

2. Terminis apsauginis vožtuvas;

3. Filtras;

4. Vanduo iš vandentiekio. Slėgis 2-6 bar. Temperatūra °C;

5. Terminio apsauginio vožtuvo sensorius.

Fig. 4 Connection diagram of the emergency cooling system

1. To sewage; 2. Thermostatic safety temperature limiter 95°C valve; 3. Filter; 4. Water from public water supply, pressure 2-6 bar, temperature 12°C; 5. Sensor of the thermostatic safety temperature limiter 95°C valve.

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INSTALLATION AND OPER ATION MANUAL

Fig. 5 Principle scheme of the house heating system including heat accumulation

Laddomat 21

Thermostatic Mixing Valve

Pump

Control

Flow

Control

Valve

Heating Boiler

Flow

Control

Valve

Air Outlet

Water Heating

Domestic Water

Recirculation

Pump Control

Thermostatic

Switch

Membrane

Expansion Vessel

Thermostatic

Mixing Valve

Domestic Water

Preparation

From Water Supply

Hot Water

Air Outlet

Other Notations:

Automatic Water

Addition Valve

Accumulation Tank

Thermometer

3-Way

Servo Drive

Mixing Valve

Return

Overow

Valve

Filter

Heating System Supply

Heating System Return

Automatic

Air Outlet

Return Valve

Valve

Pressure Relief

Valve

Pump

Thermometer -

Manometer

With Valve

Water Supply

Programmable

Heating System

Processor

Min 65

Heat production Heat consumption

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HEATING BOILER: Astra G-50

The heat consumption circle uses the heat accumulated in the tank. The circle consists of a room thermostat or a programmed control processor, room or/and outside temperature sensors, 3-way servo drive, mixing valve, underoor heating system, radiators, piping, ttings. The programmed processor controls a 3-way mixing valve, which allows more or less heat (45-60° C) into the radiators, according to demand. This way of heat consumption allows the heating of the house as long as the tank stores heat independently from the boiler.

• REQUIREMENTS FOR CONNECTION OF THE BOILER TO THE HEATING SYSTEM

The following requirements should be fullled when installing the boiler:

• The boiler should be installed in a closed heating system with a closed membranous expansion vessel, the volume of which should be no less than 10% of the total volume of the system. A closed heating system is a kind of system with no free access to atmospheric air, which actuates corrosion. Due to this, drainage of water from the system without an important reason is undesirable, e. g. in summer. It is also necessary to ensure watertightness of the system in order to need fewer rells with fresh water containing free oxygen. The quantity of the additional water let in should not exceed 5% of the system water volume per year;

• The boiler is connected to the heating system through connection pipes 6 – water supplied to the heating system and 11 – water returning from the heating system (Fig. 1);

• Internal threads G 1½” of pipes 6 and 11 ;

• There is a nipple 12 for water lling or draining from the boiler (Fig. 1);

• Internal thread G ½” of the nipple 12;

• A pressure relief valve conforming to norm EN1268-1 is to be installed in the heating system as close to the boiler as possible at a location easy to reach by hand;

• pressure relief valves and control devices must conform to the following technical characteristics:

Instrument Technical characteristics Type of boiler Pressure relief valve Connection diam. does not exceed ¾”, set opening pressure 3 bar Astra G-50 Thermometer-manometer Range of temperature 0-120°C, pressure 0 – 4.0 bar All boilers

There must be no ball valves installed between the boiler and the pressure relief valve.

• Water from the pressure relief valve should be conducted via an otake pipe. It should be conducted in a way that will

allow the water passing through the pressure relief valve to ow safely, avoiding exposure of people and electrical parts of the boiler. The diameter of the otake pipe should be no less than the diameter of the otake opening connection nipple of the safety valve. The total length of the otake pipe should not exceed 2 m. No more than 2 elbow joints at angles of 90° are to be used when installing this duct. No ball, mixing or other valves are to be installed in the water otake pipe. This otake pipe is to be installed in a way that will make the ow of the passing water visible. If part of the pipe installed is hidden, e. g., in a sewerage pipe, then such a pipe should have a special funnel enabling visual observation of the otake ow of water.

Operation of the pressure relief valve is to be checked at least once a month. The valve is opened for a short period of time, by turning its head, to reveal a small amount of the otake water. If this is not done periodically, the parts of the valve can stick together due to high temperature and fail to open, when required. In case the safety valve fails to open in an emergency situation, serious damage to the boiler and the heating system can occur as well as hazard to the health and life of people.

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INSTALLATION AND OPER ATION MANUAL

• An electric installation with earthing, in accordance with the electric safety regulations in force, is to be installed when connecting the electric part of the boiler.

Protect the isolation of the mains cable against damage.

Fig. 6 Circuit diagram of the boiler

S1 - power supply switch; S2 – ventilator switch; SK – emergency ventilator shutdown 95°C thermostat; SK2- circulation pump thermostat; SK3- operation thermostat; F - fuse; M - ventilator; - circulation pump of the heating system; U - water temperature sensors.

In order to guarantee natural water circulation of water in the boiler, the pipework between the boiler and the mixing valve in the line boiler–mixing valve–boiler is to be of the same diameter and correspond to the diameter of the connection pipes of the boiler.

• CIRCUIT DIAGRAM OF THE BOILER

1 2 3 4 5 6 7 8 9 10 11 12

N L N1 L15 N1 L12

220 V

L13

L14

S1 - įvadinis jungiklis S2 - ventiliatoriaus

jungiklis SK- avarinis termostatas SK2- siurblio termostatas SK3- darbinis ternostatas F - saugiklis 2A M - ventiliatorius

- šildymo sistemos

cirkuliacinis siurblys

U - temperatūriniai

jutikliai

L12

L11

L15

L14

N1 L1

L12

L13

L11

U U

L11

SK2

SK3

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HEATING BOILER: Astra G-50

• CONNECTION OF THE CIRCULATION PUMP

In order to insure a continuous ow of water, a circulation pump is to be installed in the system, on the return water pipe behind the mixing valve. The electronic controller of the boiler controls the pump. Before connecting the circulation pump, remove the rooftop cover of the boiler (Fig. 7). The cover is removed in the following sequence: 1) unscrew two fastening bolts, 2) lift the backside part of the cover, 3) push the cover forward and then lift it up. Connect the wire of the circulation pump to the 12-way electric terminal connector, contacts No 11 and 12, marked with the sign (See Fig. 6 “Circuit diagram of the boiler”). Connect the earthing wire of the pump to the contact No. 1 on the same connector.

• CONNECTION OF THE VENTILATOR

The boiler is transported with the ventilator removed and fastened using adhesive tape to the top of the packaging frame of the boiler.

Unpack the ventilator, screw its case on at the ventilator installation bed 10 (Fig. 1) using the existing bolts and check the stiness of the connection. The ventilator cable has already been connected during fabrication.

• MOUNTING OF THE DRAUGHT REGULATOR

At rst, mount the tee 1 (Fig. 8) present in the supply set, on the boiler ow pipe 6 (Fig. 1). Then, install the draught regulator 2 (Fig. 8) into the lateral pipe of the tee. Connect the lever of the draught regulator with the ventilator lid. When the temperature of the water in the boiler rises, the lever descends, and the main air supply damper 4 cloaks the opening of the air duct, thus restricting the air supply to the combustion chambers.

Damper 4 (Fig. 8) should not completely close the air supply opening in any mode of the boiler operation. It is recommended to sustain at least a 9 mm gap to the opening in the lowest position of the damper.

The position of the damper 4 is set by changing the length of the connecting chain of the draught regulator. First, decide at what temperature to keep the ow water during the boiler’s use. 75° C or even higher is recommended. By reaching this water temperature, the boiler should considerably lower the air supply to the combustion chambers and the burning process must slow down as a consequence. At this moment, the damper 4 must go down to its lowest position. Fire up the boiler and observe the indications on the boiler

Fig. 7 Removing the rooftop cover of the boiler

1. Unscrew bolts; 2. Lift the backside of the cover; 3. Push the cover forward , then raise.

Fig. 8 Mounting of the draught regulator

1. Tee; 2. Draught regulator; 3. Ventilator; 4. Main air supply damper; 5. Limiter 9 mm; 6. Secondary air damper.

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INSTALLATION AND OPER ATION MANUAL

thermometer. When the targeted water temperature (75° C) is reached, x the damper 4 to the lowest position by fastening the lever of the draught regulator and choosing the length of the connecting chain. Remember: a 9 mm gap should be left between the damper and the air supply opening. The exact size of the gap depends upon the draught of your chimney. The worse the draught, the greater the gap should be.

• REGULATION OF THE SECONDARY AIR DAMPER

The secondary air damper 6 (Fig. 8) is set up in the factory. To inspect the positioning of the damper: loosen the xing screw

and push the shaft of the damper forward until it gets stuck. Then pull the shaft 5 mm backwards and x it with the screw.

• CONTROLLING THE TEMPERATURE OF WATER RETURNING TO THE BOILER

It is absolutely necessary to maintain the temperature of the water returning from the heating system to the boiler at a constant level, no less than 65°C, as this will prolong the lifetime of the boiler and will make the combustion process more eective. This is because when a constant high temperature of water returning to the boiler is maintained, there arises signicantly less water vapour condensation inside the boiler. The heavy water condensation is harmful to the boiler, because deposits of tar, pitch and soot accumulate on the walls of the heat exchanger, causing intense metal corrosion. Moreover, the resulting layer of soot impedes eective heat transfer and the eciency of the boiler falls.

In order to maintain the temperature, we recommend installing the small circulation circle together with a Swedish-made thermoregulation device, “Laddomat 21-100”. Make sure that the “Laddomat” is supplied with the 72°C thermostat cartridge. The mentioned temperature is the one at which the valve of the device opens completely. However, the actual temperature of the water returning from the system and getting into the boiler after mixing, is 5-6°C lower. The higher the temperature of the return water is, the better it is for the boiler. Thermoregulation devices of other manufacturers could be used for maintaining the temperature of the returning water as well.

• HEATING OUTPUT, WATER TEMPERATURE AND WATER FLOW RELATIONSHIP

The heating output supplied to a heating system depends directly upon the dierence of ow and return water temperatures t and the intensity of the water ow circulating through the boiler. The boiler will fail to reach the desired temperature of the ow water if the returning water temperature is too cold or the circulation pump is too powerful. This will happen because the boiler will be forced to produce a larger heating output than it has been designed for. The most eective boiler operation occurs when the dierence between the ow and return water temperatures is 13-18°C. If the boiler is forced to operate with a 20°C or even greater temperature dierence, it will work ineectively, consume too much of fuel, and the combustion period of one fuel load will consequently shorten. If the previously mentioned dierence of temperatures is kept less than 10°C, the fuel in the boiler will again burn ineciently and fume because of a lack of air supply. If you know the water ow intensity near your boiler, in the above presented table you can check, what the dierence of ow and return temperatures

your boiler is capable to maintain, when operating at the nominal heating output.

Do not forget to keep the returning water temperature as high as possible, at least 65°C or even higher! It is necessary to assure that a thermometer is installed on the returning water pipe, in order to be able to observe this temperature at any time!

Dierence of water temperatures

t, °C

Heating output, kW

Water ow, l/min

11 67 12 61 13 56 14 52 15 49 16 46 17 43 18 41

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HEATING BOILER: Astra G-50

• INSTALLATION OF THE BOILER ROOM

The boiler room should be ventilated. The required air inow necessary for combustion should be also ensured. For this purpose, boiler room doors should have ventilation grating or there should be a sucient gap between the doors and the oor. If there is no possibility to supply air in from another rooms or the house is very tight, it will be necessary to install an opening in the exterior wall. The cross-section area of the opening should be at least 0.001 m2/kW.

Place the boiler as close to the ue as possible on a hard concrete levelled basement. Leave at least 600 mm gap between the backside casing of the boiler and the room wall for boiler servicing and cleaning. The smallest distance between a lateral casing of the boiler and a building structure is 400 mm. If the building structure is made of ammable materials, this distance should be doubled. A freely approachable space of at least 800 mm should be then left from the opposite side of the boiler to ensure access to the backside of the boiler, for its servicing and cleaning. The oor under the boiler, within the distance of 50 cm in front of it and within the distance of 30 cm around the boiler should be made of inammable materials. Screw supporting legs onto the base of the boiler and level the boiler with screw nuts using a level; then connect the heating system circulation pump to the boiler.

The smoke exhaust pipe of the boiler should be connected to the chimney through a metal duct. The internal diameter of the metal connecting duct should be at least the same as the external diameter of the smoke exhaust pipe of the boiler. To improve the draught, the connecting duct between the boiler and the chimney should be installed at an inclination towards the boiler. All junctions should be carefully tightened using a heat-resistant material and insulated using thermal insulation.

If an additional damper is installed between the boiler and the chimney for the draught control purpose,

the damper should not close more than 2/3 of the cross-section area of the opening in its fully closed position.

• REQUIREMENTS FOR THE CHIMNEY

It is recommended to insert acid-resistant stainless steel liner, if the chimney is made from masonry. It improves draught of

Fig. 9 Positioning of a chimney in respect to vicinity objects

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INSTALLATION AND OPER ATION MANUAL

the chimney and protects the masonry from destruction due to the impact of condensate. Internal diameter of the liner should be no less than the external diameter of the smoke exhaust pipe of the boiler. The chimney liner can be round or oval. It is not recommended to use rectangular-shaped liner as, due to the temperature uctuations, its walls deform, gaps appear at the element junction points, through which the condensate falls on the walls of the bricks chimney. Additional air is sucked in, which reduces draught of the chimney. Draught for each boiler model should correspond to the referred value of draught in the table “Technical data”. The liner should be factory made. Minimum permissible height of the chimney should be at least 6m. The top of the chimney should be above the ridge at least by 0.5m. If the chimney is further from the ridge than 1m, the angle horizonthe ridge- the cap of the chimney should consist 10° or less degrees. Draught of the chimney can also be negatively aected by various obstructions near the building: trees, hills, other buildings. Fig. 9 presents the recommended minimal angles between the chimney, nearby objects and the horizon. Angles larger than those indicated will cause reduction of draught of the chimney.

The connection of other devices to the chimney to which the boiler is connected is prohibited.

The chimney should be cleaned at least once a year!

6. FUEL

The boiler is red only by wood logs and wood briquettes. It is possible to re it with fuel peat briquettes, however the operation of the boiler becomes less comfortable for the user as it is necessary to remove the ashes of these highly ash-producing briquettes after each loading. The ceramic elements of the lower chamber can be damaged if they are removed every day when cleaning, thus their lifetime will be shorter. Therefore, we recommend usage of fuel peat briquettes only in rare, exceptional cases.

It is recommended to re dry rewood with a moisture content of 12-20 %. The drier the rewood, the larger its caloric capacity.

When the moisture content of the rewood is 20%, the heat potential of 1 kg is approximately 4 kWh; when the moisture content is 50%, its heat potential is reduced by half.

The length of the rewood should be at least 5cm shorter than the length of the boiler combustion chamber.

Type of boiler Astra G-50 Length of rewood, mm 750

The recommended thickness of the wood logs is 100-150mm. Thicker pieces of rewood should be split at least once. Up to

15% of the fuel load can consist of ne wooden splinters and sawdust. However, they must be loaded in such a way so as not to block the opening of the ceramic burner 22 (Fig. 1) connecting the upper and lower chambers of the boiler.

Do not re freshly prepared and excessively damp pieces of rewood. The operation of the boiler becomes inecient, deposits of resin emerge on its inside walls as well as excessive condensate. Corrosion of the boiler takes place several times faster when ring it with freshly prepared wood or wood that has been dried outside for several months only!

Recommendations for rewood preparation:

• put split wood in a properly-ventilated place – if possible, in a sunlit place;

• rewood should be well sheltered from rain and snow;

• pieces of split wood should be stacked with sucient gaps between them so that the freely-circulating air can blow away the moisture evaporated from the pieces of rewood;

• there should be sucient space above the heap of rewood below the roof and sucient ventilation to remove the moist air;

• it is not advisable to store freshly-cut rewood in a basement since the rewood needs sun and free air movement to dry. Dry wood can be stored in the basement where sucient ventilation is guaranteed;

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HEATING BOILER: Astra G-50

• it is recommended to dry the split rewood outdoors under the above-mentioned conditions. Depending on the type of wood, soft wood (alder, asp, r, poplar) must be dried for at least 8 months, and hard wood (oak, ash, birch) for at least 20 months.

Firing the boiler with coal, rubber or plastics is prohibited. However, loading wood briquettes into the

boiler together with their plastic packaging bags is allowed.

7. OPERATION

• FRONT CONTROL PANEL

The front control panel contains the operation thermostat 1 (Fig. 10), the thermometer 2, the green button 3 of the main

supply and the red button 4 for switching on the ventilator. The buttons light up in the ON position.

The function of the operation thermostat 1 is to switch o the boiler ventilator when the targeted water temperature is reached. Then, the combustion in the boiler slows down and the water temperature in the boiler does not rise further. The position of the operation thermostat 1 knob should be set so that its targeted temperature would be several degrees less than targeted temperature of the draught regulator (see the chapter “Mounting of the draught regulator”). Then the operation thermostat 1 will switch o the ventilator a little bit earlier than the draught regulator would descend the damper 4 (Fig. 8) into its lowest position. The appropriate position of the operation thermostat knob should be found and marked with a pencil, or a scratch should be made on the case of the knob. This position should be dened in the next way: rst, turn the thermostat knob to maximum. Then, set the draught regulator 2 (Fig. 8) to the targeted temperature, for example to 75° C. Start the boiler and allow it to reach a 75° C temperature. Then, turn the thermostat knob in the direction of the lower temperature until you hear a “click”sound. Turn the knob a little bit further and mark this position on the knob case with a pencil. Now you have found the appropriate setting position of the operation thermostat 1 (Fig. 10).

The green ventilator button 4 (Fig. 10) has three positions. The position 0-60° C is used to turn on the ventilator during the ignition of the boiler. At this state, the ventilator will be operating permanently. The central position , “OFF,“ is intended to switch o the ventilator, the button lamp then does not light. After the initial phase of kindling the boiler, when the water temperature in the boiler overlaps 60° C, the ventilator is usually turned to the position 60-90° C. This setting switches o the ventilator automatically after the combustion in the boiler has ended and the water temperature has dropped below 60° C. If you forget to switch the ventilator to the 60-90° C position, nothing serious will happen, just the ventilator will be rotating permanently even after the combustion in the boiler will come to the end.

The ventilator will be switched o equally in both the 0-60° C and the 60-90° C positions when the safety

temperature limiter 95° C thermostat 2 (Fig. 11) trips, the operation thermostat 1 (Fig. 10) switches it o.

Fig. 10 Front control panel

1. Operation thermostat knob; 2. Thermometer; 3. Green button for switching the voltage of the boiler on and o; 4. Red button for switching on the ventilator.

21 3 4

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INSTALLATION AND OPER ATION MANUAL

The circulation pump control thermostat SK2 (Fig. 6) is also located inside the front control panel and is not observable from the outside. It has two functions: 1. Turn on the circulation pump when the water temperature in the boiler reaches 60° C, 2. Turn on the ventilator if the button 4 (Fig. 10) is in the 60-90° C position and the water temperature in the boiler is higher than 60° C. Consequently, this thermostat will switch o both the ventilator and the circulation pump, when the water temperature in the boiler drops below 60° C. To learn more about the control devices of the front control panel, please, refer to the chapter “Kindling procedure of the boiler”.

• REAR CONTROL PANEL

The following safety devices are installed in the rear control panel: thermal fuse 1 and electric fuse 2 (Fig. 10). The purpose of the thermal fuse, otherwise called the maximum boiler temperature emergency thermostat, is to switch o the boiler ventilator if water temperature in the boiler exceeds the maximum permissible 95°C due to unforeseen reasons. The temperature sensor of the thermostat is installed in a dedicated sleeve 16 (Fig. 1). The burning intensity decreases when the ventilator is switched o and the water temperature decreases. When the emergency thermostat trips, the lamp of the ventilator switch 3 on the front panel switches o (Fig. 9) and the lighting indicator bulb 4 “Firing o” on the electronic regulator lights up (Fig. 11). In this case, it is necessary to nd out the causes of tripping and to remove them. After the boiler cools down, the emergency thermostat can be returned to its normal operating mode. For this purpose, unscrew its cover and depress the red button.

The cause of overheating of the boiler and tripping of the emergency thermostat must be found and removed. If this is not done, the risk of serious damage to boiler equipment as well as hazard to human health and life remains. If the user cannot locate and remove the cause of tripping of the emergency thermostat, a professional servicing company must be consulted!

The electric fuse is designated to protect the elements of the electric circuit in case the current in the mains exceeds 2 A. If the fuse is damaged, the boiler will not switch on and its indicator lamps will not light. In this case, remove and replace the fuse.

The rear control panel of the boiler is grounded.

• PREPARATION FOR FIRING

Before kindling the boiler, check the position of the ceramic chopper 2 in the lower combustion chamber: the edge of the chopper must be in contact with the rear wall of the boiler (Fig. 2). Place two ceramic segments 3 (Fig. 2) on the chopper so that they contact the walls of the boiler chamber.

Fill the heating system with water. The lling pressure should be 0.2 bar bigger than the hydrostatic pressure, yet it must not exceed the operating pressure of the boiler. After lling the system with water, perform a visual check of the tightness of the entire system. Perform it before kindling the boiler, then again after kindling and reaching the nominal operating mode. Check if the heating system is properly deaerated.

• KINDLING PROCEDURE OF THE BOILER

Before kindling the boiler, check whether all requirements indicated in the section 1 are executed.

Open the damper of the upper ue 19 by pulling the handle 3 (Fig. 1) towards yourself. Open the door of the upper combustion chamber, put dry smaller kindling wood pieces and paper on the ceramic bottom so that the paper protrudes into the lower combustion chamber through the rectangular opening of the ceramic burner 1 (Fig. 2) – this way, it will be easy to kindle the boiler through the lower combustion chamber. Put some of the easily ammable materials and larger pieces of kindling wood and rewood atop. Load the wood without any large gaps at the top of combustion chamber. Bigger pieces of

1 2

Fig. 11 Rear control panel

1. Thermal fuse ; 2. Electric fuse.

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HEATING BOILER: Astra G-50

rewood should be loaded in the middle and smaller prices at the sides, because the walls of the combustion chamber slow down the combustion of the bigger pieces of wood, due to their lower temperature.

Do not cover the entire opening of the upper ue 19 (Fig. 1) with the wood, because it will make kindling

more dicult.

The rst time, kindle the boiler using only paper and small pieces of wood in order to safely remove the

moisture remaining in the ceramic elements.

Switch on the voltage, using button 3 (Fig. 10) on the front control panel. Set the required outowing boiler water temperature using the operation thermostat knob and draught regulator (see more in the chapter “Front control panel”); we recommend a temperature of at least 75°C or – even better – a higher temperature. Close the door of the upper combustion chamber, open the lower door and set the kindling material on re. Observe the rising water temperature in the thermometer 2 (Fig. 10) display. Keep the lower door open until the boiler water will heat up to 40°C. Then, close the lower door, close the damper 19 of the upper ue by pushing its handle 3 (Fig. 1). Then, switch on the ventilator switch 4 on the control panel (Fig. 10) into the position 0-60° C. The ventilator will start rotating and the water temperature will rise further. After the temperature passes 60° C, turn the ventilator switch to the 60-90° C position. The boiler then will operate in automatic mode: it will try to reach and maintain the setpoint temperature of the water outowing from the boiler.

When ring the boiler for the rst time, the condensation of the residual moisture and drainage of water in the lower combustion chamber occurs. This is not a shortcoming. After kindling the boiler several times, this phenomenon disappears.

The doors of the boiler combustion chambers should be tightly closed, there should be no ue gases seeping into the ambience through them. Door tightness is regulated by screwing or unscrewing the hinge and lock screws of the door.

• FIRE BED AND TIPS FOR EFFECTIVE BOILER STOKING

The hot embers and charcoal in the boiler are called the re bed. Combustible gases emerge from there and are further burned in the lower chamber of the boiler. The optimal re bed height during boiler operation is approximately 4-5 cm above the bottom of the fuel chamber. The output of the boiler ventilator is deliberately chosen with the purpose of suciently supplying the re bed with air. Then, the most eective combustion of wood gases takes place. Avoid a situation when the volume of the re bed expands several times. This situation can occur if very dry and thinly cut wood gets loaded into the fuel chamber. Consequently, the volume of the re bed increases rapidly during the burning process and soon a lack of air occurs, allowing the combustible gases to escape unburned through the chimney into the atmosphere. An indicator of this undesirable course is dense fumes emerging from the chimney.

The best way to stoke a boiler is the so-called two stages method. During the rst stage, the boiler is stoked with a small amount of fuel. The aim of this phase is to warm up the boiler and form the optimal re bed. The second stage is intended for full fuel loading and to perform the main combustion.

The rst stage: Prepare thin-cut wood and paper for an easy start. The volume of loaded fuel should be about 15-20 % of the fuel chamber’s capacity. Open the upper ue damper 3 (Fig.1) and both boiler doors, put the wood and paper inside. Kindle the paper, make sure that the ring starts and close the upper door. After the temperature of water in the boiler reaches 45° C, close the damper and the lower door and turn on the ventilator. Let the boiler burn further for 30 minutes.

The second stage: Load the boiler fully. If wood briquettes are used for stoking, load approx. 70 % of the fuel chamber’s capacity. Before opening the door, turn o the ventilator. Open the damper 3 (Fig. 1) by pulling the handle towards yourself, and after some time, open the upper boiler door very slowly to avoid smoke escaping into the room. Load the fuel, close the

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INSTALLATION AND OPER ATION MANUAL

door and push the handle of the damper 3 (Fig. 1). Press the ventilator knob 4 (Fig. 10) on the front control panel into the „60-95° C“ position. The ventilator will start and the boiler will continue its ring mode.

If you lack time to stoke the boiler in the two stages mode as described above, then stoke it by one stage. The boiler will operate

as usual. But if there is the possibility to do so, use the two stages mode in order to achieve an even more eective combustion.

• REGULATION OF THE BOILER TEMPERATURE

See the chapters “Mounting of the draught regulator”and “Front control panel”.

• ADDITION OF FUEL

While adding rewood into the combustion chamber, during boiler operation or after a load has burned o, keep strictly

to the following procedure:

1. Open the damper of the upper ue 19 by pulling the handle 3 towards yourself (Fig. 1).

2. Switch o the ventilator switch 3 (Fig. 9).

3. Wait at least 20 seconds, allowing the smoke to be removed by draught; then slowly open the upper door.

4. Put the rewood in and close the door tightly.

5. Switch on the ventilator to the 0-60° C position, if the actual water temperature is lower than 60° C.

6. Close the damper of the upper ue 19 by pushing handle 3.

7. Switch the ventilator button to the 60-90° C position, after the actual water temperature has rised over 60° C. If operated following this order, smoke and carbon monoxide will not enter the room. Water temperature and pressure in

the system are checked by readings of the thermometer-manometer, installed in the heating system.

• COMBUSTION CONTROL

The status of the boiler ring process can be seen from the indications of the thermometer 2 (Fig. 10). The ring is active if the temperature of water in the boiler exceeds approximately 60° C. The ame in the boiler can be checked by opening the door of the lower combustion chamber when the ventilator is on. The visible tongue of ame has to be yellow or yellow-red and reach the ceramic element; this means the ring is proceeding in an optimal manner.

Do not keep the lower door of the boiler open for extended periods of time during ring: the lower chamber

contains gases which, when escaping into the boiler room in larger amounts, can impair human health.

• CLEANING THE BOILER

Ashes are removed from the boiler every 4-7 days. Open the door of the upper combustion chamber and shovel ashes down to the lower chamber. Open the door of the lower chamber, take out only ceramic segments 3 (Fig. 2), pour ashes to a metal box. It is not necessary to take out the triangle ceramic chopper 2 (Fig. 2) at the time of cleaning, ashes underneath it may be raked using scraper.

In any case, strictly follow the established procedure when opening the upper door: open the damper

of the upper ue, then after 20 seconds, open the boiler door.

Clean boiler chambers from tar, pitch and scurf once or twice a month. Clean the boiler when the fuel has been completely burned and the boiler is cooled down to at least +40°C.

Open the upper cap 15 for cleaning the ue (Fig. 1). Remove the turbulence plates from the ue by hooking them and pulling them out with the poker, then clean them using a scraper. Clean tar and scurf from combustion chambers and ue walls using a scraper and metal hog. Clean with the doors of the combustion chambers open. The soot residues falling down from the ue walls during the cleaning process are raked out of the boiler through the lower opening of the combustion chamber 25 (Fig. 1), pulling them outwards. When nished, place the turbulence plates back and close the cleaning cap.

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HEATING BOILER: Astra G-50

Control water pressure in the heating system at least once every two weeks. If the pressure drops, raise it by lling up the system with more water. If the boiler is not being heated for a longer time, drain the water out of the system when air temperature is below 0°C!

• EMERGENCY SHUT DOWN OF THE BOILER

If for some reason you must immediately shut down the operating boiler, by any means do not pour water on the kindling

wood! The boiler can burst!

It is very convenient to use dry sand for emergency extinction. There should be ~50kg of dry sand in the boiler room. Sand not only isolates burning rewood well from the air oxygen but also cools down the burning zone. Then, when the boiler cools down, sand can be easily cleaned and removed.

8. POSSIBLE FAULTS

Fault Cause Problem solution

1. The set temperature cannot be reached

Not enough water in the heating system Fill up Too low temperature of the return water Raise the return water temperature Thermoregulator or ventilator is defective Repair or replace Poor quality fuel: high moisture content,

too large pieces of rewood

Use dry fuel, split rewood

Heating surfaces of the boiler are very dirty Clean No draught in the chimney due to accumulated

impurities

Clean

The ceramic burner is congested Clean Ventilator damper is stuck Move or clean

2. Smoke escapes through the boiler door

The door-sealing rope is damaged Replace with a new one Door is not tight along the entire perimeter Adjust hinge supports and door lock (regulated

screwing or unscrewing of door hinge or lock screws) (see Fig. 13)

Fig. 13 Adjustment of the door and lock mechanism

No draught in the chimney due to accumulated impurities

Clean

3. Ventilator is not operating

Emergency thermostat has tripped, light of the ventilator switch is o

Unsrew the thermostat 1 (Fig. 10) cover and press the button under it. It is absolutely required to dene and remove the causes of tripping of this thermostat in order to avoid hazards to property and human health!

Power supply failure Check electric fuses of the electric panel of the

building; call electrician

Page 21

INSTALLATION AND OPER ATION MANUAL

9. WARRANTY AND ITS VALIDITY TERMS

The manufacturer provides a warranty for the boilers, the main conditions of which are the following:

• the connection of the boiler to the heating system as well as the initial kindling, adjustment and repairs are carried out by an authorised company;

• the boiler is connected to the heating system and operated following the requirements of this operation manual;

• the duration of the warranty period for the boiler is the following:

- for the heat exchanger of the boiler against leaking – 60 months,

- for other parts of the boiler – 24 months.

• the warranty repairs are performed when the fault has occurred due to the manufacturer’s fault;

• the warranty term is not extended after removing the faults which have occurred during the warranty period;

• boiler cleaning and heating system adjustment works are not covered by the warranty;

• the damage caused to the premises and the property in the premises due to the boiler fault will not be compensated;

• the warranty repair works and replacement of parts during the warranty period are free;

• the warranty period starts from the boiler purchase date;

• the warranty is valid only if the boiler is installed, connected to the heating system and operated following the requirements of this manual.

The warranty does not apply in the following cases:

• in case the heat exchanger is limed;

• in case the water or other liquid inside the boiler has been frozen;

• in case of fault of the boiler due to improper operation;

• in case of fault of the boiler due to improper connection to power supply;

• in case the boiler parts are mechanically damaged;

• in case the boiler is connected to the heating system not in accordance with the diagrams and requirements of the operation manual.

The post-warranty repair works will be carried out at the expense of the owner of the boiler.

The buyer must follow all the requirements of this operation manual during transportation, storage

and operation, otherwise the manufacturer warranty does not apply.

Page 22

HEATING BOILER: Astra G-50

10. ACCEPTANCE CERTIFICATE

The heating boiler Astra G-50, serial No. .......................................,, conforms to the technical documentation and

requirements of standard EN 303-5 and is approved as t for operation.

L. S.

Manufacturing date 201 ..................................................................................................

Head of Quality Service ....................................................................................................

SELLING CARD

Boiler sold by:

Company: ...............................................................................................................................................................................................

Address: ..................................................................................................................................................................................................

Telephone:..............................................................................................................................................................................................

Date of sale: ...........................................................................................................................................................................................

Signature: ...............................................................................................................................................................................................

BOILER INSTALLATION PROTOCOL

Boiler was installed by:

Company (technician): ...........................................................................................................................................................................

Inst alla ti on date: ....................................................................................................................................................................................

Installation data:

Height of the chimney: ..........................................................................................................................................................................

Diameter of the ue: .............................................................................................................................................................................

Draught of the chimney: .......................................................................................................................................................................

Other information concerning installation: ..........................................................................................................................................

.................................................................................................................................................................................................................

The boiler was tested on site, the control and safety elements were checked and found to be operating properly.

Person responsible for installation and testing: ..................................................................................................................................

(Name, surname, signature of the employee)

I accept the installation works: .............................................................................................................................................................

(Name, surname, signature of the client)

Page 23

INSTALLATION AND OPER ATION MANUAL

WARRANTY AND POSTWARRANTY REPAIR CARD

Boiler repaired by:

Company (technician): ...........................................................................................................................................................................

Telephone: ..............................................................................................................................................................................................

Repair date: ............................................................................................................................................................................................

Information on fault, works performed:...............................................................................................................................................

Signature of the technician: ..................................................................................................................................................................

Boiler repaired by:

Company (technician): ...........................................................................................................................................................................

Telephone: ..............................................................................................................................................................................................

Information on fault, works performed:...............................................................................................................................................

Signature of the technician: ..................................................................................................................................................................

Page 24

DECLARATION OF CONFORMITY

Manufacturer: Machinery plant “Astra” AB Address: Ulonu g. 33, 62161 Alytus, Lithuania Product designation: heating boiler Astra G-50

We declare that the above-mentioned products conform to the requirements of directives 97/23/EEC Article 2.3 and 2006/95 EEC.

The following standards were applied for the above-mentioned products: LST EN 303-5

LST EN 12828 LST EN 60335-1 LST EN 60529

Procedure of conformity evaluation in accordance with Article 2.3 of 97/23/EEC was performed by “Inspecta”, www.inspecta. com. Certication No. 2-4.2.1/619/2012

Alytus , 201 ..............................................................................

(date)

Gražvydas Eimanavičius, project manager

Astra G-50 Installation And Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual