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. TECHNICAL DATA 

HEATING POWER WITH  GRATE IN LOWER POSITION: 

Rated heating power  (wood/coal) 

22,9 kW / 22,8 kW 

Heating power of stove emission  (wood/coal) 

8,7 kW / 8,1 kW 

Thermal power of delivered water    (wood/coal)                              

14,2 kW / 14,7 kW 

HEATING POWER WITH  GRATE IN UPPER POSITION: 

Rated heating power  (wood/coal) 

16 kW / 20kW 

Heating power of stove emission  (wood/coal) 

6 kW / 8 kW 

Thermal power of delivered water    (wood/coal)                              

10 kW / 12 kW 

REQUIRED FLUE DRAFT 

16Pa 

DIAMETER OF FLUE EXTENSION 

150 mm 

HEIGHT FROM FLOOR TO AXIS OF FLUE EXTENSION 

690 mm 

STOVE DIMENSIONS: 

Width  

900 mm 

Height  

850 mm 

Depth  

600 mm 

OVEN DIMENSIONS: 

Width  

460 mm 

Height  

260 mm 

Depth  

440 mm 

FIREBOX DIMENSIONS: 

Width  

265 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: 

280-380m

3

 (total) 

Heating volume of stove emission 

100 -135 m

3

 

Heating volume of hot water (radiators) 

180-230 m

3

 

HEATING VOLUME WITH  GRATE IN UPPER POSITION: 

190-250m

3

 (total) 

Heating volume of stove emission 

70-95 m

3

 

Heating volume of hot water (radiators) 

120-155m

3

 

MAXIMAL OPERATING PRESSURE  

1,9 bar 

MAXIMAL OPERATING TEMPERATURE 

90 

WEIGHT (gross/net) 

200/170 kg 

FLUE GAS TEMPERATURE  (wood/coal)                              

268 / 272 

ºC 

CONTENT OF CO (13% O2) 

0,96 / 0,68 % 

ENERGY EFFICIENCY  

74 / 77 % 

 
Note: 
The  heating  power  is  shown  for  stoking  dry  beech  wood  with lower  heating  power  Hd=4255W/kg  and  brown 
coal Hd=4926W/kg. 
 

 
 

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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