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12 

The  firebox  can  be  filled  from  the  upper  side  as  well  (fig.12).  The  cover  is  lifted  by  using  a  wrench  and 
firewood  is  put.  It  is  not  recommended  to  put  some  organic  waste  in  the  stove  (plastic  bags,  bones  etc.) 
because in this case tar collects on the walls of the flue channel and this can cause a fire. 
After every filling it is recommended that the stove burns with maximum power for at least half an hour since 
in  the  beginning all volatile compounds in the fuel burn, which are actually the main causes for condensate 
creation in the stove. 
Insert the coal when there is good (strong) ember in the firebox, two to three times at intervals of 15 minutes.   

 

                                   Figure 12   

 

 

 

 

 

9. GRATE USE IN UPPER AND LOWER POSITION 

For cooking, baking and frying in the transit period, the upper grate position is used (fig.11) so that the flame 
could directly reach the hob thus saving the costs for cooking, baking and heating. 
The stove is delivered with a grate in lower position. In order to move the grate from the lower to the upper 
position, it is necessary to do the following:  
- Remove the hob from the stove and open the door of the firebox and the ashtray. 
- The grate should be pushed completely back with a rod for shaking the grate and then through an opening 
of the ashtray door and the space for ash and the front part of the grate should be lifted by hand and should 
be pulled out from its bearing (position). After this, the carrier of the grate is lifted and pulled out.     
- The placement of the grate in upper position is performed in reverse order. The grate carrier is placed on 
the  grate  holders  (pieces  4)  welded  in  the  boiler  firebox  in  front  and  on  the  back  side  (pieces  2+2)  (fig.1 
pos.23). In the grate carrier bearing insert the grate under an angle (aslant) so that the back part of the grate 
enters first and then put down the front part of the grate. Move the grate forward and backward so that it lies 
well in the grate carrier bearing. Put the hob in the carrier bearing of the hob frame. 
-  Placement  of  the  grate  in  lower  position  (fig.9  and  10)  is  performed  in  the  same  manner  as  the  upper 
position, provided that in the end the front part of the grate is lifted a little and through the rectangular opening 
of the rod carrier (fig.1 post.25) the rod for shaking the grate should be inserted. The grate is slowly put down 
so that the grate notch falls in the opening of the rod for shaking the grate.    
Warning: 
-  In  the  lower  grate  position,  the  heating  of  water  is  better,  larger  number  of  radiators  can  be  heated  and 
bigger surface of living space, but cooking is more difficult. 
-  In  the  upper  grate  position,  the  heating  of  water  is  weaker,  small  number  of  radiators  can  be  heated  and 
small surface of living space, but cooking is much easier. 
- In both grate positions baking is the same (it is not impeded).   

10. AUTOMATIC REGULATION 

The stove power is adjusted with a thermostat (power regulator, combustion regulator) located in the ashtray 
door  and  which  automatically  adjusts  the  lapse  of  the  regulator  flap  depending  on  the  adjustment  of  the 
regulating  knob  (fig.1  pos.10  and  pos.19)  and  the  height  of  water  temperature  in  the  stove  heater.  The 
regulation knob has many positions written on the knob and this is shown in table 1 as follows:   
 

Table 1 

 

Position of regulator knob 

Water temperature in the stove (

C) 

Closed regulator 

30 

40 

50 

70 

90 

 
The cover (flap) for air in the power regulator system completely regulates the air intake for combustion it he 
remaining openings are closed. 
 

11. SECUNDARY AIR REGULATOR 

A  secondary  air  regulator  is  placed  in  the  firebox  door  (fig.1  pos.8  and  fig.13).  It  is  used  for  regulating  the 
subsequent  ignition  and  combustion  of  unburned  gases.  Its  opening  and  closing  is  performed  manually 
through a knob positioned on the firebox door. 

Summary of Contents for 20

Page 1: ...1 STOVE FOR FLOOR HEATING ALFA TERM 20 INSTRUCTIONS FOR INSTALLATION ADJUSTMENT AND USE ...

Page 2: ... mm Height min max 264 452 mm Depth 414 mm OPENING OF FIREBOX DOOR width height 175 200 mm CONNECTIONS OF DISCHARGE AND RETURN LINE R1 RS CONNECTIONS OF THERMO VALVE AND SAFETY VALVE R1 2 RU CONNECTIONS OF COOLING PIPES R1 2 RS BOILER VOLUME 14 l HEATING VOLUME WITH GRATE IN LOWER POSITION 280 380m3 total Heating volume of stove emission 100 135 m3 Heating volume of hot water radiators 180 230 m3 ...

Page 3: ... The stove for floor heating is constructed so that it enables maximum safety during operation Safety during stove operation is provided in three ways combustion regulator thermostat fig 1 pos 10 located in the ashtray door which automatically closes the air intake in the stove firebox when the set water temperature in the boiler is reached Thermal valve thermal fuse Fig 7 Item 13 and Fig 7a when ...

Page 4: ...4 1 2 18 7 16 17 13 11 25 12 3 4 5 6 15 14 19 20 21 22 7 8 16 17 10 11 9 23 24 9 Figure 1 ...

Page 5: ...aches its rated power if the flue draft is 20Pa We recommend the following flue sizes with which this draft is obtained Stove Denotement Rated heating power kW Flue height m 6 7 8 9 10 ALFA TERM 20 Brown coal wood Dimensions of light surface mm 22 8 22 9 145x200 145x145 145x145 145x145 145x145 Proper flue and meeting other requirements set out in the material that follows are a prerequisite for fl...

Page 6: ...erformed by a qualified person according to the appropriate project The stove is intended for floor and central heating It can be installed in closed and open heating system Adhere to the regulations JUS M E7 201 and JUS M E7 202 Diagrams of closed and open system are shown on fig 7 and fig 8 ...

Page 7: ...ator with manometer 1 2 the same or similar as shown in Fig 7b and Fig 7 Item 19 3 Filter for cold water at the input of the water supply to the thermal valve Fig 7 Item 20 4 Filter for hot boiling water intake of the boiler and water outlet of thermal valve Fig 7 Item 21 Note These components are not included with product for central heating you bought Installation of thermal valve with built in ...

Page 8: ...4 WATER FILTER OF THE BOILER OUTLET Fig 7 Item 21 It is required to install the filter on the boiler outlet which will clean the hot boiling water from dirt and solid objects that can damage the tap seals or seals of the thermal valve This filter must be resistant to water temperatures up to 150 C NOTES After the completion of thermal valve activation checking the pressure in the installation and ...

Page 9: ...th pressure of 2 4 bar It is desirable that water is drained out from the system at least once because of the grime located in the system For an installation in which only a stove alfa term 20 is connected we recommend expansion vessel from 18 l but not less than 12 l which would be placed on returning water as close as possible to the boiler and no block valve should be set between the boiler and...

Page 10: ...ressure regulator 20 Water filter at the input of the boiler 21 Water filter at the output of the boiler 22 Thermal fuse probe 23 Thermal fuse capillary pipe Figure 7a Figure 7b INSTALLATION DIAGRAM OF OPEN SYSTEM OF STOVE FOR FLOOR HEATING ALFA TERM 20 10 9 6 8 1 3 16 7 11 2 12 5 15 4 14 13 Figure 8 1 Hot water boiler 2 Flue extension 3 Distribution line 4 Open expansional vessel 5 Safety valve 6...

Page 11: ...on which consumers radiators are connected with a minimum power of 8 kW When the system is cold the flap of the power regulator combustion regulator thermostat located in the ashtray door fig 1 pos 10 and pos 19 should be open Pull ahead the butterfly knob for opening and closing fig 1 pos 4 and fig 16 That way the butterfly knob is open and kindling is enabled Later when the stove is inflamed we ...

Page 12: ...enters first and then put down the front part of the grate Move the grate forward and backward so that it lies well in the grate carrier bearing Put the hob in the carrier bearing of the hob frame Placement of the grate in lower position fig 9 and 10 is performed in the same manner as the upper position provided that in the end the front part of the grate is lifted a little and through the rectang...

Page 13: ...irewood 15300 WARNING In order to get rated heating power and as higher rate of usage we recommend that you use dry beech wood cut with a length of L 33cm as a heating material 14 CLEANING AND MAINTENACE Before every filling with fuel the stove grate must be cleaned with a spade by opening the ember holders or through the open door of the firebox The ash from the ashtray should be removed at least...

Page 14: ...rain water from the installation Safety valve failure Replace safety valve 6 Sudden water temperate increase in the installation Air in the installation Perform radiator venting Closed valves towards radiators Open all valves in the heating system and provide normal water circulation in the installation Circulation pump failure The circulation pump should be repaired or replace it thereby allowing...

Page 15: ...Select low speed Air in installation Release air from the heating system Loose knobs or some screw on the stove Tighten knobs and screws 11 Sounds in the pump The pressure at the pump suction part is to low Increase system pressure or check the expansion vessel 12 The stove overheats loud noise cracking is heard in the boiler of the stove Electricity outage has occurred the circulation pump does n...

Page 16: ...gh a thermostat or shortly open the ashtray door 18 There is too much heat in baking cooking The thermostat is set to a high temperature Reduce water temperature through the thermostat or stoke moderately 19 The boiler stove releases smoke during initial startup Combustion and heating of the stove and flue It is normal for the stove to release some smoke during initial startup and this stops after...

Page 17: ...he guaranteed period with original spare parts for which we also provide a guarantee under the same conditions This guarantee does not exclude or affect the rights of the customer in regard to the conformity of the goods pursuant to the legal regulations If the delivered product does not conform to the agreement the customer has the right to ask the seller to repair that lack of conformity without...

Page 18: ...18 Overall dimensions of stove ALFA TERM 20 300 309 712 781 797 806 64 152 268 5 64 235 1 1 1 2 RU 1 2 RU 1 2 RS 1 2 RS 880 850 100 500 1448 900 Ø146 Ø142 690 132 65 600 197 24 5 35 35 107 ...

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