Instruction manual
34 
Advantages  
Boiler installation with accumulation tank brings several advantages: 
- lower fuel consumption (up to 30%). Boiler works at full output, until the fuel is burned-out, while 
optimum efficiency is kept 
- long chimney and boiler life-time and minimum creation of acids and condensate 
- option to combine with other heat sources - solar collectors, etc. 
- combination of boiler with underfloor heating 
- comfortable and ecological heating 
Boiler protection against overheating 
ATTENTION:  Following  the  norm  EN 
303-5,  the  aftercooling  circuit  against 
boiler  overheating  cannot  be  used  for 
other  purposes  than  boiler  protection  against 
overheating.  Valve  at  the  cooling  water  inlet 
into cooling circuit must be permanently open 
and boiler cooling circuit must be connected to 
functional distribution of cooling water (e.g. to 
cold water distribution of water supply system) 
with  temperature  of  10-15°C  and  operation 
pressure  of  2-6  bar.  The  STS20  valve  at  the 
aftercooling circuit outlet with sensor in the boiler 
rear part. Protects boiler against overheating in the 
following  way.  If  water  temperature  exceeds 
95°C, it lets the water from water supply system 
into aftercooling circuit to absorb the warmth. In 
case  of  boiler  overheating  and  opening  of  the 
STS20  valve,  the  permanent  outlet  of  warmed 
water from boiler´s aftercooling circuit into flow-off has to be ensured. 
In case that circulation of cooling water through aftercooling circuit is not ensured at opening of 
the thermostatic valve STS20, there is a danger of boiler damage! In this case the warranty for 
boiler expires. 
Transport, manipulation and storaging 
Producer puts the article on pallet and fits it on with technological screws. It is packed in the paper 
box, binded by sticky tape and wrapped into stretched foil. 
Transport, manipulation and storaging of packed product is permitted only on this pallet. For 
manipulation to boiler´s standpoint there are suspension eyes for manipulation with elevator, 
available after removing of upper cover. 
Only approved person can ensure manipulation with the boiler. 
Instructions to liquidation of the product after its life-time expiration  
Ensure the liquidation of the product (boiler) by repurchase / collection of raw materials, 
respectively use regulated dumping ground, controlled by appropriate municipal office. 
Liquidation of packaging 










