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Summary of Contents for Astra B-25E
- Page 1 ASTRA MACHINERY PLANT AB • ANNO 1929 HEATING BOILER Astra B-25E INSTALLATION AND OPERATION MANUAL 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...
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Page 2: Table Of Contents
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. -
Page 3: Safety Requirements
1.5. A safety valve for no more than 2 bar response pressure should be fitted onto the boiler in the heating system for the boiler Astra B-25E (please see Chapter 5, “Requirements for connection of the boiler to the heating system”). -
Page 4: Technical Description
HEATING BOILER: Astra B-25E 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. Fuel chamber door; 3. Primary air regulation shutter; 4. Secondary air regulation shutter; 5. Combustion chamber door;... -
Page 5: Technical Data Of The Boiler
INSTALLATION AND OPERATION MANUAL • TECHNICAL DATA OF THE BOILER Indicator value Name of indicator Astra B-25E firing with wood logs Nominal heat output, kW firing with wooden briquettes Class according to EN303-5 Class of protection against electric impact Efficiency rate,%... -
Page 6: Ceramic Elements Of The Boiler
• TURBULENCE PLATES Turbulence plates – a technology invented and patented by “Astra” engineers (Patent No., 6004, Ministry of SPB), 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. -
Page 7: Intended Use
INSTALLATION AND OPERATION 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 efficient usage of the boiler and safe operation. -
Page 8: Description Of The Emergency Cooling System Diagram
HEATING BOILER: Astra B-25E at the nominal or maximum heat output. It is mandatory to install an accumulation tank of sufficient 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 outflowing water is maintained in the boiler (65-70°C). - Page 9 INSTALLATION AND OPERATION MANUAL Fig. 5 Principle scheme of the house heating system including heat accumulation...
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Page 10: Requirements For Connection Of The Boiler To The Heating System
Technical characteristics Type of boiler Pressure relief valve Connection diam. does not exceed ½”, set opening pressure 2 bar Astra B-25E, 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. -
Page 11: Connection Of The Circulation Pump
INSTALLATION AND OPERATION MANUAL Protect the isolation of the mains cable against damage. 220 V KR-5 Fig. 6 Circuit diagram of the boiler S1 - power supply switch; S2 – ventilator switch; SK – emergency ventilator shutdown 95°C thermostat; C-Capacitor; F - fuse; M - ventilator; J - Socket of a circulation pump of the heating system;... -
Page 12: Controlling The Temperature Of Water Returning To The Boiler
HEATING BOILER: Astra B-25E • 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 effective. -
Page 13: Installation Of The Boiler Room
INSTALLATION AND OPERATION MANUAL 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. The place of installation should be as near the return pipe of the boiler as possible. -
Page 14: Fuel
HEATING BOILER: Astra B-25E cause reduction of draught of the chimney. This boiler is efficient. As a result, smoke getting into the flue is rather cold - the average temperature of it is 150° C. Low temperature of smoke raises a possibility of the condensate falling onto the walls of the flue. Deposits of combustion products residues for the same reason can grow up in the flue faster. -
Page 15: Operation
INSTALLATION AND OPERATION MANUAL The recommended thickness of the wood logs is 100-150mm. Thicker pieces of firewood should be split at least once. Up to 15% of the fuel load can consist of fine wooden splinters and sawdust. However, they must be loaded in such a way so as not to block the opening of the ceramic burner 23 (Fig. -
Page 16: Rear Control Panel
HEATING BOILER: Astra B-25E smoke penetration into a room. Meanwhile a running boiler program ! 95°C 220 V is being stopped for the same period. After 1 minute elapses, the rotational speed of the fan returns to the former level and the boiler program continues from an interruption point. - Page 17 INSTALLATION AND OPERATION MANUAL sensor for measuring water temperature is installed in the special immersion pocket 19 (Fig. 1), the outer side of which is submerged in water inside the boiler. A PT–type sensor for measuring smoke temperature is installed in the special sleeve 8 (Fig.
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Page 18: Verification Of The Controller Program Version
HEATING BOILER: Astra B-25E nears the end and the “Firing off” mode conditions are KR-5 Rear panel of the regulator fulfilled: the smoke temperature decreases to less than the programmed value (75 °C) and lasts on that level for the set period (20 min). Then, pump indicator lamp 5 switches off as well. -
Page 19: Programming Of The Kr-5 Controller
INSTALLATION AND OPERATION MANUAL (temperature of smoke), (the DHW boiler temperature). Press once again the button “P” shortly to see the desired indication. For example, if the indication will light shortly and after it, value will be shown on the screen, then it means that the smoke temperature is 129 °C. -
Page 20: Preparation For Firing
HEATING BOILER: Astra B-25E P17 – “strict” control mode. “Strict” means that the ventilator is switched off completely when the measured water temperature in the boiler reaches the set water temperature plus 5 °C. The ventilator is turned on again when the measured water temperature drops to the set temperature. -
Page 21: Fire Bed
INSTALLATION AND OPERATION MANUAL 1 stage kindling. This method requires more careful preparation of the wood chips and paper layer so that it would flame up successfully while the fuel chamber has been loaded completely. A sequence of piling up of fuel and kindling is the same as in the 2 stages kindling described above: first, the layer of medium-sized and smaller wood pieces, second, the layer of wood chips and paper, third, the main fuel load of normal-sized wood pieces (do not forget to keep the paper accessible for kindling). -
Page 22: Combustion Control
• DESCRIPTION OF THE SMOKE TEMPERATURE SENSOR FUNCTION The smoke temperature sensor is mounted in Astra boilers in order to: 1) help the controller achieve the optimal smoke temperature, 2) turn off the ventilator after firing in the boiler is accomplished, 3) turn off the circulation pump after the firing... -
Page 23: Cleaning The Boiler
INSTALLATION AND OPERATION MANUAL Although the optimal smoke temperature is set up in the factory, we recommend that you set the temperature by yourself once again after the installation of the boiler at its operation place. In this way, a more precise temperature will be set up with respect to the fuel used, draught and other peculiarities of the installation. -
Page 24: Emergency Shut Down Of The Boiler
HEATING BOILER: Astra B-25E • 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 firewood well from the air oxygen but also cools down the burning zone. -
Page 25: Erasing The Error Indication
INSTALLATION AND OPERATION MANUAL • smoke temperature sensor: the indication (Smoke Sensor Error) blinks every 10 seconds. The boiler remains operational but a turning off period at the end of combustion increases substantially; • domestic hot water (DHW) temperature sensor: the indication (boiler Sensor Error) blinks every 10 seconds. -
Page 26: Acceptance Certificate
10. ACCEPTANCE CERTIFICATE The heating boiler Astra B- ......., serial No........,, conforms to the technical documentation and requirements of standard EN 303-5 and is approved as fit for operation. Manufacturing date 201 .................... -
Page 27: Boiler Installation Protocol
INSTALLATION AND OPERATION MANUAL BOILER INSTALLATION PROTOCOL Boiler was installed by: Company (technician): ................................... Address: ........................................Telephone:......................................Installation date: ....................................Installation data: Height of the chimney: ..................................Diameter of the flue: ..................................... Draught of the chimney: ..................................Other information concerning installation: ...................................................................... -
Page 28: Declaration Of Conformity
DECLARATION OF CONFORMITY Manufacturer: Machinery plant “Astra” AB Address: Ulonu g. 33, 62161 Alytus, Lithuania Product designation: heating boilers Astra B-25E 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:...
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