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16 

- open ashtray door and no 
regulated combustion 

Close the ashtray door and through 
the knob on the cover of the 
ashtray door and thermostat, 
reduce the water temperature in 
the system. 

- the grate is in lower position and 
small number of radiators are 
switched on 

Transfer the grate to upper position 
or switch on some other radiator. 
Keep the ashtray door closed. 

 

14 

Water condensate in 
the boiler 

Damp heating material 

Change heating material 

Too low temperature of returning 
water from the heating system 

Insert combined valve or switch off 
some radiator from the heating 
system 

15 

Outlet water 
temperature is not 
appropriate (low) 

Non-calorific heating material  

Change heating material 

Heating system is oversized 
(a large number of radiators) 

Switch of some radiators 

Little heating material is inserted in 
the firebox 

Increase the quantity of heating 
material in the firebox 

16 

Fire does not burn 
regularly  

Weak flue draft 

Make a new flue or repair the old 
one 

Flue pipe connections do not seal.  
The doors on the stove and the flue 
do not seal. The flue draws “false 
air”. 

Seal all connecting spots so that 
“false air” would not occur 

17 

There is not enough 
heat in baking, cooking 

The thermostat is set to a lower 
temperature 

Increase water temperature 
through 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 some time.  

20 

The boiler-stove 
releases smoke during 
regular use 

Uncleaned flue, flue pipes and 
stove 

Clean the internal part of the flue, 
the flue pipe and stove. 

Damp heating materials of the 
heating materials you use 
intensively release smoke 

Change heating material. Use dry 
hating material and heating 
material that does not release 
smoke 

Overloaded firebox 

Fill the firebox slowly, gradually, in 
a couple of times 

Bad flue 

Repair or make a new flue 

21 

The grate is stuck when 
cleaning is performed 

Some spike is stuck, slag or 
something else on the grate 

Clean the grate of undesirable 
objects 

                                             

17.

 

TIME OF GUARANTEED SERVICING  

This implies the period during which we guarantee the service, accessories and space parts, starting from the 
day of purchase of the device. 
The time of guaranteed servicing is in accordance with the valid legal regulations. 
In case of change of the model and the design of the device, the term for change of parts that have modified 
design is within the legal term. 
After this term we provide the modified parts in the new designs. 
 

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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