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Operating instructions 

 

Operation 

Once the operating temperature has been reached, the first burnup should be 

completed without reducing the combustion air. Once almost all the wood has been 

burnt and there is a firebed with subtle flames, it is time to add more fuel. Larger 

sized pieces of firewood can now be chosen, up to a max. of 2.4 kg. The amount of 

wood added depends on the heating requirements. 

The air controller should remain fully open until the wood which has been added is 

properly ignited. To prevent the basic stove from overheating, a surface temperature 

of max. 85°C should be aimed for. 

The combustion air can now be reduced for further operation and the speed of 

combustion thus slowed down. In principle, however, the thermal output is controlled 

by the amount of fuel added and the operating time. 

The combustion air may only be reduced to the extent that clean combustion is 

ensured. If dark threads of smoke form on the tips of the flames, the combustion air 

was reduced too much. 

Maintaining the glowing embers 

After the flames have gone out, an energy-loaded firebed remains in the combustion 

chamber. It can now be decided whether the fire should be revived with thin firewood 

and an open combustion air supply. 

At the end of the heating phase, the combustion air is reduced again to keep the 

embers glowing for longer. The air controller is only closed completely if the stove is 

heated up and the firebed has gone out.  

Ash 

Wood logs and wood briquettes produce only a small amount of combustion residue. 

It will therefore be necessary to remove this ash from time to time. This should be 

done when the bed of ashes is more than 5 cm high. It is staggering how long 

embers can remain hot in seemingly cold ash. That is why ash should never be 

thrown directly from the stove in the waste bin. It is recommended to store ash 

temporarily in a metal bucket with lid. Ash is also suitable for composting. 

 

 

Summary of Contents for CITY GRUNDI Maxi

Page 1: ...CITY GRUNDI Maxi Assembly and operating instructions www brula de ...

Page 2: ...tove principle The basic stove also known as a storage stove is synonymous with long lasting and healthy heating And these are precisely the advantages offered by this stove system Compared to a hot air system which uses the principle of convection and essentially only heats up the air a basic stove emits warmth into the room slowly and evenly in the form of healthy radiant heat something which is...

Page 3: ...lso check that the fireplace has been connected properly The CITY GRUNDI described here is tested according to EN 13240 2005 15a B VG and may be attached to a chimney with multiple connections provided that the chimney s technical conditions allow this If the basic stove is attached to a chimney with multiple connections the springs in the firebox door must not be removed This ensures that the doo...

Page 4: ...620 445 mm One off wood feed rate max 2 4 kg Burn up time when 2 4 kg are placed in the stove approx 1 hour Firing capacity 8 KW Nominal heat output 2 4 KW Mass flow of flue gas 11 33 g s Flue gas temperature 226 C Minimum delivery pressure 13 Pa Weight of Maxi 350 kg Combustion air neck 125 mm Flue pipe outlet at back at top 130 mm Lower edge of rear flue pipe 1360 mm Safety distances to combusti...

Page 5: ...ings are ideal for heating up Since the combustion air flows from above into the combustion chamber it should be ensured that the wood is stacked loosely in the combustion chamber The chippings are placed in the middle of the pile This allows the combustion air to flow freely through the firewood The air controller is opened fully for heating up and each time more fuel is added To do this turn the...

Page 6: ... the extent that clean combustion is ensured If dark threads of smoke form on the tips of the flames the combustion air was reduced too much Maintaining the glowing embers After the flames have gone out an energy loaded firebed remains in the combustion chamber It can now be decided whether the fire should be revived with thin firewood and an open combustion air supply At the end of the heating ph...

Page 7: ...en the combustion chamber door is not closed in order to intervene if necessary GENERAL INFORMATION The maximum amount of fuel which can be placed in the stove is 2 4 kg h Do not store combustible items on the stove Metal items can become hot Your basic stove is not a waste incineration plant and should never be used for burning waste Just like all technical appliances your basic stove should also...

Page 8: ...t not be used for lighting and must not be burnt Liquid fuels Moist or treated wood Wood chips or bark waste Chip boards or comparable coated and uncoated materials Plastics and foams All materials which are foreign to wood Paper cardboard All types of waste Your fireplace is not a mini waste incineration plant Please protect the environment and only use approved and suitable fuels Cleaning the fi...

Page 9: ...9 Operating instructions City Grundi Maxi 62 0 cm 44 0 cm 163 4 cm ...

Page 10: ...e stones 18 x Stainless steel retaining clips 1 x Firebox lid 1 x Firebox base stone 4 x Mantel stone 1 x Mantel stone lid 1 x 10 kg Dipping cement 1 x 1 kg rapid adhesive mortar 1 x Smoke stack connection 130 mm 1 x Round bar grate inserted loosely in the firebox 1 x Protective glove 1 x Cap for cleaning opening only with rear smoke stack 1 x Self adhesive calcium silicate tape 1 x Fibre felt 12 ...

Page 11: ...11 MAXI assembly instructions ...

Page 12: ...cate tape in the gaps between the ceramic components and the platform door to enable optimal elongation Loosely suspend the retaining clips and insert the top plate stones Step 3 Step 4 Step 5 Caution Adhesive grout it applied to the front A space of 0 5 1 cm is left between the firebox and cladding The front elements are only adhered to the mantel stone with adhesive grout ...

Page 13: ...13 MAXI assembly instructions Step 6 Step 7 Step 8 Each top plate stone is held by 4 stainless steel retaining clips Step 9 Step 10 Step 11 ...

Page 14: ...14 MAXI assembly instructions Design of City Grundi maxi with rear burning The intermediate space is filled with a strip of Promaglaf fibre mat PLEASE ALWAYS GLUE ALL COMPONENTS FULLY TO EACH OTHER ...

Page 15: ... EEC and with the following harmonised standard EN 13240 2005 15a B VG A1 A2 test centre code 1721 The fireplaces for solid fuels are tested to ensure compliance with the standard requirements by the notified test centre DBI Gastechnologisches Institut gGmbH Freiberg Halsbrücker Straße 34 09599 Freiberg Germany Code 1721 11 11 2009 Date Signature Stamp The safety information in the assembly and op...

Page 16: ...ppliance Multiple connection is permitted Distance from combustible components 30 cm CO emission from combustion products 0 06 Exhaust gas temperature C 226 Heating capacity KW 2 4 Energy efficiency 84 Fuels Only use recommended fuels Year of manufacture 2017 Observe the operating instructions The values specified were determined under laboratory conditions ...

Page 17: ...iciency index EEI 112 0 Nominal heat output Pnom kW 7 9 Direct heat output kW 7 9 Indirect heat output kW Thermal efficiency at nominal heat output ηth nom 84 0 Auxiliary current consumption at nominal heat output elmax kW 0 0 Auxiliary current consumption at minimum heat output elmin kW 0 0 Auxiliary current consumption in standby mode elSB kW 0 0 Type of heat output room temperature control no r...

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