Astra H-25 ES Specification sheet

MACHINERY PLANT “ASTRA”
LT- 62161 Alytus, Ulonų 33 Lithuania
tel. [phone]
fa . [phone]
HEATING BOILERS
Astra H - 25 ES
Astra H - 31,5 ES
Astra H - 45 ES
MANUAL OF INSTALLATION
AND EXPLOITATION
K-30.00 NI
2011

2 | P a g e
Heating boilers are transported packed under the manufacturer’s documentation, protected from atmospheric
precipitation and dust.
The transporter shoul ensure the quality of pro uct transportation an protect from amages.
The ven or (manufacturer) oes not accept claims for pro uction amage uring transportation.
The BUYER shoul lay claims to the transporter for the pro uct amage uring transportation.
The BUYER (user) shoul follow all requirements of this gui ebook uring transportation, storage an
exploitation, otherwise he loses the ven or’s (manufacturer’s) guarantees.
This instruction will enable accordance with the requirements according to LST EN 12171 "Heating
systems in buildings - rocedure 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. The air should freely access the room.
1.3. The boiler flue connection with the chimney should be tight. Don’t heat up the boiler with leaking
flue connections!
1.4. The boiler should be installed in a closed heating system with a closed (membranous)
e pansion vessel, the volume of which should be no less than 10% of the total volume of a heating
system (including the boiler) (the volume of the e pansion vessel can be calculated according to the
standard EN 12828 anne D).
1.5. Safety valve for no more than 2 bar response pressure should be installed at the boiler in the
heating system for the boilers Astra H-25 ES and Astra H-31,5 ES and ma imal 2,5 bar response
pressure for the boilers Astra H-45 ES. Please consult the chapter 4.
1.6. Clean boiler flues from smoke and pitch scurf, as indicated in this passport. The chimney
should be cleaned as required by fire prevention regulations.
1.7. The room where the boiler is installed should have fire-e tinguishing tools: fire-e tinguishers,
sand bo , shovel and other tools.
1.8. Don’t put flammable materials on or near the boiler.
1.9. Connect the boiler to the electric system only by a three-pole plug plugged into an adequate
three-pole socket with earthling. Protect connection cable from damages.
1.10. Monitor operation of temperature regulation devices and manometer readings. If notice
an abnormal boiler operation, stop heating and eliminate damages.
1.11. Kindle the boiler and put the firewood into the boiler only as indicated in section 6 of
this manual.
1.12. Keep children away from the boiler! Only adults can serve the boiler.
1.13. Before kindling the boiler, check, if the heating system is filled up with water and aired.
1.14. Operating pressure in the heating system should not e ceed:
- 2 bar – for the boilers Astra H-25 ES, Astra H-31,5 ES,
- 2,5 bar – for the boilers Astra H-45 ES.
1.15. The electrical connections of the boiler are tested:
- evenness of the protective chain – electric resistance of the protective chain does not e ceed
0,1 Ω,
- the minimal resistance of the electric insulation is 1,0 MΩ,
- the resistance of the electric insulation is checked using 50 Hz, 1000V.
2. PURPOSE OF THE PRODUCT
Heating boilers are designed for heating of dwelling houses, public, industrial and similar purpose
buildings where water-heating systems are installed. Boilers are fired only with wood (firewood) or (saw dust,
peat, chaff, etc.) briquettes. It is recommended to fire dry (20% moisture content) wood. It is possible to fire fine
wood waste and saw dust in small quantities (to 10%), mi ing them with firewood. Control and regulation
equipment installed in the boilers automatically maintains the set heat carrier (water) temperature, ensures cost-
efficient operation of the boilers, and safe e ploitation.
The boilers of this type are constructed for wood firing with a partial gas generation. In the upper
combustion chamber of the boiler, gas is e tricated (generated) from the burning firewood and burned in the
lower chamber. Intensity of gas generation and its combustion is regulated by the frequency and duration of air
inlet into combustion chambers.
Advantages of the boilers:
 Gas generation from firewood ensures a high effective operation coefficient.
 Boiler is equipped with the e cess heat distribution system (serpentine of the emergency
cooling).

3 | P a g e
 Power of the boiler (temperature of a heat carrier) is controlled automatically by a thermo-
regulator, by turning on or off a ventilator (ventilators) of the air inlet into combustion chambers;
and by a traction regulator, by closing or opening air supply opening cap of the ventilator.
 Long load combustion period.
 Control of the volume of air supplied to the upper and lower chambers of combustion
 Complete fuel combustion ensures cost-efficient fuel e ploitation.
 Ashes might be removed only 1-2 times per week.
3. TRANSPORTATION, STORAGE, UNPACKING, PREPARATION TO EXPLOITATION
Heating boiler should be carefully loaded, unloaded and transported, suffering no big impacts. The
boiler can be transported only in a vertical position, fastened in order to avoid sliding and falling. If the boiler is
transported in other than vertical position, decorative surfaces may be damaged, tins battered, control and
regulation equipment broken, built-in ceramic kindling details may fall down and splinter.
The boiler should be stored also in a vertical position. It is not allowed to put one boiler on another,
as a safety-packaging frame is not designed for this purpose. The boiler should be stored in closed space
protected from atmospheric precipitations. Air humidity of the room should not e ceed 80% in order to avoid
condensate (dew) forming on the surfaces of the boiler. Storage temperature may vary from -40 ºC to +60 ºC.
If the boiler was transported or stored in minus temperatures, then before it is kindled, it should be
kept in plus temperature no less than for 2 hours (for the order and requirements of the first kindling see section
6 of this passport).
After the heating boiler is delivered to the site, take off the packing frame and polyethylene film and
unscrew bolts of boiler fastening to the packaging base. Take off the boiler from the packaging base.
WARNING Opening the oors of the boiler, check, if all tools liste in the section “THE BOILER
KIT” are there. Check, if painte surfaces haven’t been amage , components – not battere , control an
regulation equipment – not broken uring transportation.
If notice any inadequacies of the listed above, lay your claims to the transportation or vendor company.
The kit consists of:
1. Boiler 1 unit
2. Poker 1 unit
3. Scraper 1 unit
4. Guidebook for e ploitation 1 unit
6. Leg 4 units
5. INSTALLATION
These boilers of solid fuel are boilers of complete loading. For this reason they reach the highest
effectiveness when they are working at the nominal power and due to this the boilers must be equipped with
the accumulation tank of sufficient size which could accumulate the e cessive heat volume.
Recommended capacity of the accumulation tank is about 50 liters for 1 kW of nominal power of
boiler:
Model of boiler ASTRA H-25 ES ASTRA H-31,5 ES ASTRA H-45 ES
Required volume of
accumulation tank , liters 900 1500 1800
The boiler has to be exploited only with the installed emergency cooling system.
Description of the connection scheme of the emergency cooling serpentine (see Fig. No.4).
Thermostatic safety valve protects the boiler form the overheating. If the water temperature in the boiler
e ceeds 95
0
C the valve automatically opens the flow of water from the water supply system through the cooling
serpentine. This water absorbs the e cessive heat energy and flows out. Sensor of valve with the e ternal
thread ½“ is screwed in the socket on the rear wall of the boiler.
Technical data of the thermostatic safety valve :
Opening temperature 97±2
0
C
Highest working temperature 110
0
C
Working pressure 10 bar
Pipe of sensor L=142 mm, e ternal thread ½“
ATTENTION The system of the emergency cooling of the boiler can not be use for the heating
of water.

4 | P a g e
Description of the principal scheme of the boiler room. When the water temperature in the
boiler reaches 60
0
C there is launched circulation pump connected with the boiler. Water circulates through the
thermostatic mi ing valve in the cycle „boiler – thermostatic mi ing valve – boiler“.
Heating system is equipped with the programmed automatic control processor and 3-way mi ing
valve with electric drive (if the heating system is not equipped with the programmed automatic control processor
and 3-way mi ing valve with electric drive there can be installed manual operation 3-way mi ing valve and to
perform the regulation of heating system in manual way). When the water temperature rises further the
programmed processor control and regulate the temperature of the water supplied from the accumulation tank
to the heating system. This temperature depends very much on the outside and ambient temperatures
measured with the sensor.
In order to avoid the corrosion of boiler caused by the water condensate in the temperatures below
55
0
C thermostatic mi ing valve automatically ensures that the minimal temperature of water returning to the
heating boiler is 60
0
C.
Installing the boiler, the following requirements should be fulfilled:
 The boiler should be installed in a closed heating system with a closed (membranous)
e pansion vessel, the volume of which should be no less than 10% of the total volume of a
heating system (including the boiler). The closed heating system is the system with no free
access to atmospheric air, which actuates corrosion. Due to this, it is restricted to drain water
from the system without a particular reason (e.g. in summer, etc.). It is also necessary to ensure
tightness of the system in order to need fewer refills with fresh water having free o ygen.
Quantity of the additional water should not e ceed 5% of water volume of the system per year.
 Boiler should be connected (see the fig.2) to the heating system with the connection nozzles for
the supply of water to the heating system (pos. 10) and for the return of water from the heating
system (pos.11). Female threads of the nozzles pos. 10 and 11 are G 1
1
/
2
“. The nozzle pos. 14
(Fig. 2) is designed for the inlet or outlet of water. The male thread of this nozzle pos.14 is G
1
/
2
“.
 Safety valve corresponding the requirements of standard EN 1268-1 should be installed in the
accessible place together with the corresponding temperature and pressure gauge.
Instrument Technical characteristics Type of boiler
Safety valve Connection diameter does not
e ceed
½”, opening pressure
2 bar
Astra H-25 ES, Astra H-31,5 ES
Safety valve Connection diameter does not
e ceed 3/4”, opening pressure
2,5 bar
Astra H-45 ES
Temperature – pressure
gauge
Range of pressure 0-4 bar
Temperature 0-120°C
All the boilers
There must be no shut-off valves between the boiler and safety valve.
Water from the safety valve should be conducted via an offtake duct. It should be conducted in the
way that the water let by the valve would safely flow, avoiding e posure with people and electrical parts of the
boiler. The diameter of the offtake duct should be no less than the diameter of the offtake opening connection
branch of the safety valve. Total length of the offtake duct should not e ceed 2 metres. Installing this duct, no
more than 2 elbow joints at 90
0
angles should be used. No closed, adjustable or other reinforcements should be
installed in the valve water offtake duct. This duct should be installed in the way to see the offtake flow of the
water. If the end of the duct is to be hidden (e.g. in the sewerage pipe), then this duct should have a special
funnel enabling to see the offtake flow of the water.
WARNING Operation of the safety valve shoul be checke at least once per month. The valve is
opene for a while by turning its hea to see a small quantity of the offtake water. Avoi ing this,
ue to a high temperature impact, the components of the valve may stick together an serious
amages of the boiler an the heating system may occur as well as anger arise for human health
an life.
WARNING In or er to guarantee a natural water circulation in the boiler, the pipeline between the
boiler an the four-way mixing valve (boiler – four-way mixing valve – boiler) shoul be of the same
iameter an meet the iameter of the boiler connection branches.
 The boiler will operate in the most effective and economic way, if a circulating pump is installed
in the system. It should be installed behind the mi ing valve in the pipe of returned water. This
guarantees a constant water flow in the heating system. The pump is controlled with the

5 | P a g e
electronic controller of boiler and is connected to the electric socket on the rear wall of the
boiler.
 Boiler room should be ventilated. The required airflow necessary for combustion and ventilation
should be also guaranteed. For this purpose, boiler room doors should have grid or there
should be a gap between the doors and the floor. If there is no possibility to bring air in from
another rooms or the house is very tight, it will be necessary to make an opening in the e terior
wall. Air quantity should be no less than 1, 6 m
3
/kW per hour. Cross-section area of the opening
should be no less than 0,001 m
2
/kW. The required air quantities and areas of the opening are
presented in the table below.
Boiler type ASTRA H-25 ES ASTRA H-31,5 ES ASTRA H-45 ES
Required air quantity
per hour, m
3
/h 29 40 50,4
Area of airflow
opening, m
2
0,018 0,025 0,0315
For e ample: the area of airflow opening should be 0,025 m
2
or 250 cm
2
, i.e. 16 16 cm; or the
height of the gap under the door - about 4 cm when door width is 60 cm.
Put the boiler on the hard (e.g. concrete) and even ground, closer to the chimney pot. Leave at
least 600 mm gap between the back wall of the boiler and building structure for boiler servicing and cleaning.
The smallest distance between a lateral wall of the boiler and building structure is 400 mm. If building structure
is of the flammable materials, this distance should be doubled. At least 800 mm gap should be left from the
other side of the boiler to have an access to the backside of the boiler, its servicing and cleaning. From three
sides of the boiler the floor of 300 mm and from the front of the boiler the floor of 500 mm should be of
inflammable materials. Screw supporting legs in to the base of the boiler and level the boiler with screw nuts
using a level. Then connect the circulation pump of heating system to the relay of the boiler conductors marked
with ◄ sign.
Smoke e haust opening of the boiler should be connected with the chimney by a metal pipe.
Internal diameter of the metal connecting pipe should be at least of the e ternal diameter of the smoke e haust
opening of the boiler. To improve the traction, a connecting pipe between the boiler and the chimney should be
installed with an inline towards the boiler. All junctions should be carefully tightened by a heat-resistant material
und insulated.
ATTENTION If you install a itional valve between the boiler an chimney for the regulation of
traction, this valve in the close position must not close more than 2/3 of the iameter of outlet.
Chimney requirements. It is recommen e to install aci -resistant stainless steel shell into the
stone chimney. It improves traction of the chimney an protects the stone chimney from estruction ue to the
con ensate (moisture) impact. Internal iameter of the shell shoul be no less than the external iameter of the
smoke exhaust opening of the boiler. Chimney shell may be roun or oval. It is not recommen e to use
rectangular shell, as ue to the temperature fluctuations, its walls eform, gaps appear at the element junction
points, through which the con ensate falls on the walls of the stone chimney, an an a itional air is sucke in,
which re uces traction of the chimney.
Traction of smoke shoul correspon to the calculate value of traction
(see the table of technical ata). The shell shoul be constructe by the factory an certifie .
Minimum permissible height of the chimney shoul be at least 6 m. The top of the chimney shoul
be above the top roof at least by 0,5 m. If the chimney is in bigger istance than 1 m from the top roof, the top of
the chimney shoul level with the line going own from the top roof with no bigger than 10° angle from the
horizon. You shoul also evaluate the influence of ifferent obstacles present aroun the buil ing (trees, other
buil ings, etc.) (see fig. 3).
It is not allowe to connecte any other equipment to the chimney connecte with the boiler.
Electrical installation with earthing should be installed for connection of the electrical part of the
boiler pursuant to electrical safety requirements (see a
principal electricity scheme, fig. 4). PROTECT isolation
of the connection cable from damages!
5. FUEL
The boiler is fired only by firewood and different briquettes. It is prohibited to fire by coal. It is
recommended to fire dry firewood (15-20% moisture content). The drier is the firewood, the bigger its caloric
content. When a moisture content of the firewood is 20%, thermal value of 1 kg is appro imately 4 kWh; when
the moisture content is 50%, its thermal value reduces in half.
The length of the firewood should be at least 5 cm shorter than the length of the boiler combustion
chamber, i.e.:

6 | P a g e
Boiler type ASTRA H-25 ES ASTRA H-31,5 ES ASTRA H-45 ES
The ma imal length of the
firewood in mm 330 450 550
The recommended thickness of the firewood is 100-150 mm. Larger firewood should be split at
least once.
WARNING Don’t fire newly prepare an too amp firewoo !
Recommendations for firewood preparation:
- Put split firewood into well ventilated and, if possible, well sun lightened place. Firewood should
be well protected from rain and snow;
- stow the split firewood with sufficient gaps in between in order for a freely circulating air to
withdraw the moisture evaporated from the firewood;
- there should be a sufficient space atop of the firewood up to the roof and such ventilation that
wet air could drift away;
- it is not recommended to store freshly cut (undried) firewood in the cellar, as its drying requires
sun and free air circulation. Dry firewood could be stored in the cellar where sufficient
ventilation is guaranteed;
- It is recommended to dry split firewood under above described conditions in dependence with
the type of the wood: soft wood (alder, asp, fir, willow etc.) – no shorter than 8 months, hard
wood (oak, ash, birch, etc.) – no shorter than 20 months.
6. EXPLOITATION
Preparation for heating
Before kindling the boiler, check the edge (5) position at the lower combustion chamber (see fig. 2):
the edges should be pressed to the rear wall of the boiler. Two segments must be placed in the front of the
edges.
In the frontal part of the boiler below the cover of the ventilator in the air inlet there is a damper to
regulate the air inlet to the upper burning chamber and heater. This damper is present by the producer.
Operation of the damper:
Fill the heating system with water. The filling pressure has to e ceed the hydrostatic pressure by 0,
2 bars but no e ceeding the working pressure of the boiler. When the system is filled up with water, check
tightness of the whole system before kindling the boiler and afterwards when the operation reaches its standard
mode.
Using air rain valve check if the air is sufficiently raine from the heating system.
Kindling order of the boiler
Before kindling the boiler, check whether all requirements indicated in the section 1 are e ecuted.
Open the amper of the upper flue (C) by pushing the han le (12) towar s yourself (see fig. 2). Open the
oor (9) of the upper combustion chamber (2) an put ry kin ling woo on the heat-resistant shell (3) to
form 2-3 cm gap between the opening of the shell an kin ling woo . Put some of the easy flammable
materials an bigger kin ling woo an firewoo atop.
These easy flammable materials (paper) should be
inserted in such a way, that it would come through the rectangular hole to the lower chamber of combustion
in order to permit to fire the boiler through the lower chamber. Fire the kin ling woo , wait till the firewoo
combusts, close the oor an turn the han le (12) of the flue amper from yourself to the en . Loa the
woo without any bigger spaces until the top of combustion chamber. Bigger pieces of firewoo shoul be
loa e in the mi le an smaller prices – at the si es, because the walls of the combustion chamber ue to
their lower temperature slows own the combustion of the bigger pieces of woo . Do not cover with the
wood the hole of the smoke extraction valve C. With the boiler control panel switch the tension of the
electronic controller with the button „0“-„I“ ( see the technical escription of the electronic controller).
There will be switche on the lights an temperature in icator. Using the buttons of the temperature
regulation set require temperature of the water flowing of the boiler – it is recommen e to set on the
70
0
C. Close the upper oor of the combustion chamber, open the lower oor, burn the woo pieces ., Leave
the lower oor open until the water temperature in the boiler reaches 40
0
C. Close the lower oor, close the
valve of the upper smoke traction by pushing the han le of valve (12) to the en . Switch-on the ventilator
with the control panel. Afterwar s the boiler will work on the automatic range an will maintain the set
temperature of the water from the boiler.
WARNING The oor of the boiler combustion chambers shoul be tightly close , there shoul be
no flammable pro ucts accessing the exterior. Door tightness is regulate by screwing or unscrewing hinge an
lock screws of the oor.
Regulation of the boiler temperature – see the technical description of the electronic
regulator.
Emergency thermostat of the water temperature (safety switch 95
o
C ).

7 | P a g e
If the water temperature ue to the unforeseen reasons excee s the maximum allowable limit
(safety thermostat in the factory is set at 95
-2
ºC temperature), safety thermostat (emergency switch),
switches off the ventilator of the air supply. Combustion intensity will ecrease an the temperature of water
will rop.
When the emergency thermostat comes into action (switches off) – the in icator light of the
ventilator will switch off an electronic controller in icator light "heating off" is on, it is necessary to etect
the reasons an to remove them. Emergency thermostat is turne on by taking off the cover of thermostat
95
o
C an pressing the re button.
The attempts of purchaser to repair the thermostat an to recover its functions on his own without
removal of reasons which cause the over-heating of boiler can result not only serious amages of boiler,
but also the anger for the health an life. If the reasons of the switch of the emergency thermostat can not
be etecte an remove , it is necessary to call the servicing company !
Addition of the firewood
While putting firewood into the combustion chamber (during boiler operation or after load burning
off), keep strictly to the set order:
1) Open the damper of the upper flue by pulling the handle (12) (see fig. No. 2).
2) Switch off the ventilator.
3) Wait at least 20 s, slowly open the upper door.
4) Put the firewood in and close the door tightly.
5) Switch on the ventilator.
6) Close the damper.
If operated following this order, smoke and carbon won’t enter the room.
Combustion control
The combustion control of boiler is described in the chapter “COMBUSTION CONTROL” of the
technical description of regulator KR-4.
The flame in the boiler can be checked by opening the lower door of the combustion chamber
when the ventilator is off.
Temperature regulation of the heating system – See the description of the scheme of boiler
room (beginning of the chapter 4).
Cleaning of the boiler
Aches are removed from the boiler each 4-7 days. Open the door of the upper combustion chamber
and shovel aches down to the lower chamber. Open the door of the lower chamber, take out the ceramic inserts
and shovel ashes to the metal bo .
WARNING In any case keep strictly to the etermine or er: open the amper of the upper flue,
then after 20 s open the boiler oor.
Clean boiler chambers from smoke-black and pitch scurf once or twice a month. Clean the boiler
when the fuel is completely burned and the boiler is cooled down to at least +40 °C.
Clean smoke-black and scurf from combustion chambers and flue walls using a
scraper and metal hog. Clean after the doors of the combustion chambers are open and caps
of flue upper and lower openings unscrewed. Smoke-black and scurf on the bottom of the
chimney are cleaned through the hole of the lower chamber of combustion B (see fig. 2).
Control water pressure in the heating system at least every two weeks. If necessary, fill it up. If the
boiler is not being heated, drain the water off the system when air temperature is below 0 °C!
Emergency extinction of the boiler
If due to any reasons you must immediately e tinct the heated boiler, by any means don’t pour
water on the kindling wood! The boiler can burst.
It is very convenient to use dry sand for emergency e tinction. There should be ~50 kg of dry sand
in the boiler room. Sand not only well isolates burning firewood from the air o ygen but also cools down the
burning zone. Then, when the boiler cools down, sand can be easily cleaned and removed.

8 | P a g e
7. POSSIBLE DAMAGES
Damage ause Ways of elimination
1. The set temperature
(power) cannot be
reached
- Not enough water in the heating
system;
- Thermo regulator or ventilator is
broken;
- Bad quality fuel (high moisture
content, very large firewood);
- Heating surfaces of the boiler are
very impure;
- No traction in the chimney (impure) –
the upper ignition is congested;
- Ceramic burner is foul.
Fill up
Replace
Use dry fuel, split firewood
Clean
Clean
Clean
2. Smoke breaks through
the doors
- Tightening rope is damaged;
- Doors are leaky along the whole
perimeter.
- No traction in the chimney
Replace with a new one
Adjust hinge supports and door
lock (regulated screwing or
unscrewing door hinge or lock
screws) (see. Fig.2)
Clean.
3. Ventilator isn’t
operating
- Emergency thermostat went off
(switch light of ventilator is off);
- Thermo regulator or ventilator is
broken;
- Disconnection of electricity supply.
Call representatives of the service
company; turn on after indication of
the causes (see section 5)
Replace
Check electric fuses of the building,
call the electrician

8. TE HNI AL DATA
Indicators' meanings
Indicators ASTRA H-25 ES ASTRA H-31,5 ES ASTRA H-45 ES
Nominal heat output, - fire wood, kW
- wooden briquets, kW
25
26
31,5
33
45
47
Boiler class according to EN 303-5
Class of protection against electric impact
1
1
1
1 1
Efficiency, % 83 83 83
Are of the internal heated surface of boiler, m
2
, 1,92 2,08 2,2
Power of the cooling serpentine, kW 15 15 15
Water content in the boiler, litres 63 78 85
Setting range of the temperature controller
O
C 60-85 60-85 60-85
Ma draught in, mbar 0,30 0,30 0,30
Working pressure of water in the system , bar, ma 2,0 2,0 2,5
Testing pressure of boiler, bar 4,0 4,0 4,5
Ma . water temperature in the boiler,
O
C,
Ma . allowable operating water temperature in the boiler,
O
C,
110
95
110
95
110
95
Electric connection characteristics : - voltage, V/ frequency, Hz 220/50 220/50 220/50
- used power, W 50 50 50
Level of electric protection of boiler IP30 IP30 IP30
Dimensions - height, mm 1230 1230 1230
- width, mm 578 578 578
- depth, mm 765 900 1000
Weight of boiler, kg, 240 310 350
Diameter of the water side connection 1
1
/
2
” 1
1
/
2
” 1
1
/
2
”
Volume of combustion , l 90 120 140
Filling opening dimensions, mm 350 285 350 285 350 285
Flue pipe diameter, mm 152 152 152
Length of wood pieces, mm 330 450 550
E haust gas temperature at the nominal heat output,
0
C 160 163 217
E haust flow rate at the nominal heat output , m
3
/h 31 32 100
Resistance of the water tract, mbar 9,3 10,8 24
Combustion period at the nominal heat output, - tire wood, h
- wooden briquets, h
3,0
3,1
2,7
2,9
3,3
3,5

9. GUARANTEE AND ITS VALIDATION CONDITIONS
1. The manufacturer gives 2 year guarantee*, if the installation, start-up and regulation (the first
kindling and adjustment) and maintenance are performed by the certified company and the 6 months guarantee
if the mentioned works are e ecuted by the non certified company :
- the guarantee repairs are performed, if the faults occur due to the manufacturer’s fault or used
bad quality materials;
- guarantee period is not e tended after boiler faults have been eliminated during the guarantee
period;
- boiler cleaning as well as boiler and heating system regulation are not included into the list of
guarantee repair works;
- guarantee doesn’t mean that losses suffered due to the boiler fault occurred during the guarantee
period will be compensated;
- guarantee repair works and replacements of the parts are free of charge during the guarantee
period;
- the client pays for boiler installation and the first kindling and regulation works.
* One year guarantee is given to the boiler ventilator, thermo regulators an oor stuffing (tightening
ropes).
2. Guarantee validation conditions:
- guarantee is valid from the boiler selling date;
- guarantee is valid, if the boiler is installed, connected to the heating system and e ploited under
the requirements of this passport.
3. Guarantee is not applied in the following cases:
- when heat e changer is limed;
- in case the heat transmitter is frozen;
- when the boiler is broken due to improper e ploitation;
- when the boiler is broken due to improper connection of the electric input;
- when the boiler parts are mechanically damaged;
- if the boiler is connected to the heating system not under the schemes and requirements of this
passport.
4. The owner of the boiler pays himself for repair works performed after the guarantee period.
10. ACCEPTANCE CERTIFICATE
The heating boiler “Astra H - ........“ serial No. _________ meets the standard (EN 303-5)
requirements and is accepted suitable for e ploitation.
Manufacturing date _________________
Head of Quality
Service ____________________

11 | P a g e
BOILER GUARANTEE CARD
Boiler Astra H-........
Boiler serial No.
Selling date, place, seal
Seller’s name, surname, signature
BOILER START-UP AND ADJUSTMENT CARD
Start-up, adjustment date
Start-up and adjustment performing company
Certificate No .
Employee’s name, surname, signature
Employee’s qualification certificate No.

1230
1005
L
578
65
120
262
230
40
200
470
170
Boiler type L
K-25 765
K-30 900
K-40 1000
1208
1133
Trap regulator
Supplie
Retuming
Cross-section
1
1.Frame
2
2.Combustion chambers
3
3.Ceramic shel
4
4.Air path with ventiliators
5
5.Ceramic e ge
6
6.Flue
7.Sensors of the termregulators an
emergency thermostat
8
8.Tekeoff cap
9
9.Combustion chamber oors
10
10
11
10;11.Connecting braches G1
12
12.Damper hengte of upper combustion chamber
oppening to the flue
13
13.Control panel
14
14.Outlet of watter G1/2"(outer)
15
15.Divertor of smoke flow
16
16.Flue cheaning caps
17
17.A justable legs
1818
19.
18.Connection of the cooling serpentine G 1/2''
19
A
A-Air inlet opening
B
B
C
B-Opening to the flue
C-Upper combustion chamber opening to the flue
Fig.2.General picture of the boiler
152
1"
2
20
20.Socket 5mm of termometer for ceturn flow
water elektronik control
7
Trap regulator
Nozzle of the cooling serpentine G1/2''
(outer)

Primary supplying of air
Seconciary suppling of air
Direct combustion
A justing valve of primary
suppling of air
A justing valve of secon ary
suppling of air
Fig.2a.Chart of air flow movement

Fig. 3. Zones of win influence
Bigger angles form an increase resistance of the chimney traction
Thermical
safety
valve
Fig.4 Heating energy distribution scheme (Scheme for the
connection of serpentine of emergency cooling)
Filter
To sewage
Water from
the water
supply
system
pressure is
2
-
6 bar.
Sensor of
Thermostatic
Safety valve

1
PE
2
N
3
L
4
L1
5
L1
6
L14
7 8
9
N
10
L3
11
N
12
L4
4
N L
N L
N L
L1 N1 L2 L3 L4 P
L N
L13
L2
N
L13
L14
PE
PE
PE
Circulation pump
(connecting by customer)
220 V
PE
M
F
SK S2
S1
KR
L1
L
Fig. 5. Electric scheme (electronic
control)
S1 – inlet switch (R595KMET2F)
S2 –ventilator switch (R392KYFT2C)
SK – emergency thermostat ( LA322-
96111338)
F – safety plug 2A
M – ventilator (G2E108 AG 63-01)
K-25. K-31.5
M – ventilator (G2E120-AR77-73)
K-40
KR – controller (KR-4/2)

Ceramic inserts an their position in heat boiler
1
2
3
No Ceramic Type of heat boiler
insert Astra
25ES
Astra
31,5ES
Astra
40ES
1Burner
G-18.00.003
ŠK-23.07.001
ŠK-50.07.001
1
1
1
Chopper
2
G-18.00.002
ŠK-23.00.006
ŠK-50.00.010
1
1
1
3Segments
G-18.00.004
G-18.00.004-01
44
4

18 | P a g e
Technical description of the control device KR-4/2
Designation:
Control device is designed for the control of the solid fuel boiler. Fan is controlled according to the law of
proportional – integral- differential regulation (PID) and the pump, air valve or electric heating device are
regulated positionaly.
onnection:
Control device is connected according to the scheme designed on the
fig, No. 1:
L1, N – supply of electricty to the control device;
L2 – supply of electricity to the fan;
L3 – voltage to the fan;
L4 – voltage to the pump;
P – voltage to the programmed output.
Fig. 1. Scheme of the connection of control device
Temperature sensor NTC is installed in the water tight capsule which is immerged into the water of boiler.
Voltage of the fan L2 is connected from the control pannel of the boiler to the control device when the boiler
works in the heating regime (the fuel is loaded and the limit thermical relay is not in action). Impulse
commutator of the fan connects L3 to L2. The relay of control of pump connects L4 to L1. It connects P with
L1.
The power of the fan is 20÷100 VA. The ma imal power of the controlled pump is 250 VA. Ma imal controlled
power of the relays of programmed output is 250 VA.
Exploitation
After the loading of fuel the fan is put into operation with the swith on the control panel. There appears green
signal light "Heating" 3 (Fig. 2.) and the process of the fan control begins. The fan is working only when the
green signal light No. 3 is on.
The desired water temperature of the boiler is set with the keys 2 (2 pav.). By short pressing of “+” or “-“, digital
indicator 1 starts to indicate the temperature of the water in the boiler. For the change of the temperature it is
necessary to press and to keep the related key (for the increasing “+”, for decreasing “-“ ). After the few
seconds after the last press of the key the set temperature is saved and the indicator starts to show the
measured temperature of the water (when indicator shows the set temperature , there is a point lighting near
the digits ; when indicator shows the real measured temperature there is no point lighting near the digits).
1 – digital temperature indicator;
2 – temperature setting keys;
3-6,8 – signal lights:
3 – "heating",
4 – "heating off",
5 – "pump",
6 – “fan“,
8 – “programmed output“.
7 – programmed output control key
Fig. 2. Front pannel of the regulating device
The speed of the fan is proportional to the deviation of the temperature, to its duration and to the rate of the
increase/decrease of the water temperature in the boiler.
Each time at the start there is launched the electric magnet, which opens air valve and there appears light 8.
ontrol of the pump
The pump of the heating system can be switched on for the continuing operation or it can be switched on and
off depending on the water temperature. The operation of the pump and the temperatures for the switch on /
off are defined by the servicing staff, referring to the characteristics of the heating system. When the pump is on
there is a signal light 5 on the front pannel of the control device (fig 2.).
Burning control
The state of work „heating off“ is indicated in the following cases:

19 | P a g e
- if the temperature after two hours from the beginning of heating is T≤45
o
C;
- if the temperature drops below 45
o
C and does not increases within the period of 30 min.;
- if during the operation of boiler the pump is switched off for longer than 1 hour. (it is not applied when the
pump is put on the constant operation ).
The state of operation „heating off“ switches off the fan and switches on the corresponding light signal. This
state can be left by switching off the voltage L2 or the supply of the electricity to the control device.
Programmed output
Depending on the design of the boiler the programmed output can control air valve or electric heating. If there is
installed electric heating it can be swicthed off automaticaly when the boiler is on the mode „heating off“. In
order to activate or desactivate this control it is necessary to keep pressed the key “P” 7. There will apear “On”
at the indicator (activated) ir “OF” (switched off). The servicing personnel set the temperatures of switching
on/off for the electric heating referring to the characteristics of rthe heating system.
Control device No.: . . . . . . . . . . . . . .
Date of installation: . . . . . . . . . . . . . . . . . . . . . . .
* - depending on the design of the boiler

20 | P a g e
Declaration of Confirmity
Manufacturer: Machinery plant “Astra” AB
Address: Ulonu st. 33, 62161 Alytus, Lithuania
Product designation: Heating boiler
Heating boiler Power,
kW
Waking pressure, bar
Astra H-25 ES 25 2,0
Astra H-31,5 ES 31,5 2,0
Astra H-45 ES 45 2,5
We confirm, thwart this product designated comply with the conditions of the
following:
1. Requirements of the directives :
97/23 E , p2.3
2006/95 E
These standards were applied for the above mentioned products:
EN 303-5
EN 12828
EN 60335-1
EN 60529
Procedure of conformity evaluation according to regalement 97/23 E 2.3 is executed
by „TÜV Thüringen‘‘. ertification No 0662/0327/06, No 0662/0373/05
Alytus 2011 ...........................
(date)
Vaidas Liesionis , marketing director
GB