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The best fuel material are burning logs of high density 

hardwood (over 500 kg/m

3

 whose calorific value equals 

about 2100 kWh/m

2

 - such as beech, ash, oak, 

hornbeam. 

• 

Wood should be stored outdoors, in a dry and well-

ventilated place. 

It is not recommended to burn coniferous wood in the 

fireplace for a long time because of the resins it 

contains, which can quickly lead to burdensome 

soiling of the insert. In addition, softwoods are prone 

to sparks, which can at times be dangerous due to the 

possibility of sparks flying into the room when opening 

the door. 

• 

It is prohibited to burn any materials in the fireplace that 

are not natural wood waste, in particular: chipboards, 

varnished or stained wood, cardboard and paper, all 

kinds of fabrics and plastics. 

• 

It is prohibited to burn or otherwise use flammable 

liquids. 

5.2. Fuel feeding and firing up 

a) 

Check whether the supply and extraction air systems 

are not blocked. 

b) 

Before loading fuel, clean the firebox of excess ash, but 

not completely. Move the remaining ash under the rear 

wall of the firebox to allow primary air to enter the 

chamber from under the front strip. 

c) 

Place thicker wood logs at the bottom of the firebox. 

Gradually place increasingly smaller logs and top them 

with finely chopped logs and kindling. Kindling 

(preferably rolls of wood wool soaked in paraffin) should 

be put on top of the pile and lit from the top, which is the 

recommended method for Unico inserts, making burning 

cleaner with less smoke emission, which, in turn, makes 

the whole process more ecological and efficient. 

d) 

Open the combustion air inlets completely. 

e) 

Set  fire  to  the  kindling  and  leave  the  door  slightly 

open  until  the  fire  does  not  fade  anymore  after 

closing. 

f) 

Do not use any liquid kindling, gasoline, thinners, etc. 

for the fireplace. 

5.3.  Burning 

a) 

When the first load is burnt out and only embers remain, 

you can add wood as needed to match the size of the 

insert. 

You should take into account that from burning 1 kg 

of wood we obtain about 3.4 kW, so no more than 

4.5  kg  of  wood  should  be  put  into  a  15  kW  insert. 

Adding  larger  amounts  of  fuel  at  one  time  may 

damage the insert. 

b) 

Logs should be placed as much as possible to the 

back of the firebox, so that during burning and sliding 

they  do  not  adhere  to  the  glass  and  fall  out  when 

opening the door. 

c) 

The door should always be opened slowly in order to 

prevent negative pressure and the gases escaping into 

the room. 

d) 

The intensity of combustion is controlled with the 

adjustment slide. 

5.4.  Regulations 

•  Combustion air regulation 

Primary air for combustion is supplied from outside to 

the collector installed underneath the insert. A special 

regulation system delivers it to the upper and lower 

part of the firebox. 

•  Afterburning system 

Extreme positions of the lever allow to completely shut 

off or open the primary combustion air supply. 

Each lever position in between allows to supply the 

appropriate amount of air to the upper and lower parts 

of the firebox according to demand. 

 

 

 

 

 

 

 

 

Summary of Contents for DRAGON

Page 1: ...USER MANUAL ...

Page 2: ...nd energetic parameters of the insert In order to make the most of the technical parameters of the Unico insert as well as to ensure perfect safety during its use we kindly ask you to read carefully and follow the instructions in this manual We wish you many years of trouble free use of the Unico insert and countless happy moments spent in the warmth of the fireplace President of the Board Waldema...

Page 3: ...nual 5 4 1 Fire protection 5 4 2 Ventilation 6 4 3 Combustion air supply 6 4 4 Heating air circulation 6 4 5 Chimney 6 4 6 Connecting the Nemo insert to the central heating system 7 4 7 Notes on the first start up 8 5 User manual 8 5 1 Fuel 8 5 2 Fuel feeding and firing up 9 5 3 Burning 9 5 4 Regulations 9 5 5 Cleaning the insert 10 6 Notes 11 ...

Page 4: ...ational and local provisions should also be complied with 3 Safety recommendations Unico fireplace insert is a device that is completely safe and provides satisfaction and joy of use when installed and operated in strict compliance with safety requirements Please pay special attention and follow the recommendations below The insert should be installed and commissioned by a specialist company with ...

Page 5: ...replace insert must be a self supporting structure without any direct connection to the insert It should provide easy access to the insert and its connections for servicing and inspection purposes The housing of the insert should be insulated in such a way that its vertical and slanting surfaces do not heat up over 120 C and the horizontal surface shelves on which objects can be placed over 85 C T...

Page 6: ... bearings and other elements of the insert as well as the fireplace housing It is recommended to protect the air intake from dust and sand from the outside which may damage the air intake control mechanism 4 4 Heating air circulation For proper heat dissipation from hot elements of the insert and the pipe to the room appropriate cross sections of the heating air inlet and outlet should be provided...

Page 7: ...m pressure of the installation should be 1 9 bar An open expansion vessel should be connected with a pipe of min 28 mm The expansion vessel must be located above the highest point of the installation the overflow hole should be 0 1 If the fireplace insert is to be installed with another boiler operating in a closed system a separating plate heat exchanger should be used Regardless of the type of i...

Page 8: ...7 Notes on the first start up The first start up of the insert must be made before installing the fireplace After the first usage of the insert a check should be made whether the central heating installation is filled with water If there is a risk of temporary temperature drop below 0 C the central heating installation should be filled with anti freeze liquid The use of corrosion inhibitors is rec...

Page 9: ...he recommended method for Unico inserts making burning cleaner with less smoke emission which in turn makes the whole process more ecological and efficient d Open the combustion air inlets completely e Set fire to the kindling and leave the door slightly open until the fire does not fade anymore after closing f Do not use any liquid kindling gasoline thinners etc for the fireplace 5 3 Burning a Wh...

Page 10: ...agram below open c l o s e d 5 5 Cleaning the insert Systematic cleaning and maintenance of the fireplace insert is required for its safe and proper operation and also affects its aesthetic appearance How to clean the insert remove excess ash from the firebox chamber clean the walls and shelves in the upper part of the firebox chamber from soot and other impurities clean the glass Cleaning should ...

Page 11: ...he fireplace insert with the door open b Take proper care if there are children in the room where the fireplace is used The glass temperature can often exceed 300 C which when handled carelessly can cause burns or fire c In case of any malfunctions or if you need to put out the fire close the air intake damper If this is not enough use a spatula to collect the contents of the hearth into a metal b...

Page 12: ......

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