For connecting the fireplace insert into the main heating circuit there are fittings which are described for each fireplace insert in their
own technical data list
1. On the top (right hand side) there is a hot water outlet (pos.3) for the connection with the main hot water piping (pos.10). It is the tubing of DN
25 and it is marked with red colour.
2. Down on the side part, there is cold water inlet to the exchanger (pos.2) for the connection with the main cold water piping (pos.11). It is the
tubing of DN 25 and it is marked with blue colour.
3.
A main piping must be made in accordance with the national standards and rules. Its diameter must be counted, so that to eliminate a pressure
loss and irregularity of the installation. There must not be any closing valves on inlet and outlet pipes. In general we do not recommend reducing
a diameter of inlet and outlet. Three way thermostatic valve must be always connected in the circle (pos. 15) which assures minimal
temperature of return water of 45ºC.
4.
It is possible to install the warm water fireplace insert into the system with an open and also closed expansion box (pos.8). Its capacity must
not be less than 20% of water volume in the system of the central heating. The open expansion vessel must be situated on the top point of the
system (idealy between the fireplace insert and the circulating pump. If space doesn’t allow that, it is possible to place it outside the fireplace
surroundings, for example into the boiler room). The connection must be made by the piping of the diameter of pipe DN 25. For closed circuit,
there must beprovided a thermic control in accordance with national standards (thermostatic valve for connection of coolant loop into
the water supply system). (pos .12)
5. The circulating pump (pos. 4) DN 25/60 is connected with the hot water outlet. The min. flow is 900 l/hour. The circulating pump is
switched by the termostat that senses the temperature of water inside the exchanger. We recommend the temperature for the switching of
45
0
C.
6. The total output of installed radiators must be higher than the warm water changer output. It is not recommended to install room thermostats on
radiators, except the room where the fireplace is situated.
7. There must be a pressure relief valve connected with the warm water outlet from the changer. It must also be connected with the discharge pipe
to protect the fireplace surround from water of the system. Operating pressure of the central heating system is up to 2.5 bar, the pressure relief
valve must be set on max.pressure of 2,5 bar.
8. The hot water fireplace insert can be installed with the existing central heating system with the main boiler (pos.18) (e.g. boiler room). The
connection must be parallel to the main boiler (pict.4). It is necessary to install clap valves (pos. 5 and 20 – pict. 3, 4) behind circulating pumps
of the boiler and the fireplace (downstream of warm water) to stop the water circulation between the fireplace and the main boiler.
9. After the connection with the central heating system it is necessary to pressurize the whole system. There must be a magnitude of the operating
pressure, so that to eliminate the system water leak before the hot water fireplace insert is put into the wall.
10. Fireplace insert has to be fitted by bleed valve (pos. 17) directly to the fittings on its highest point (det. placing is displayed in technical
data of each fireplace insert). Use ideally the automatic bleed valve with raised heat resistance (for solar systems).
Connection in the circuit with thermal accumulative vessel
For more symmetrical heat supply, it is useful to connect the insert into the circuit with thermal accumulative vessel. The connection is the
same as the connection see pict.3, instead of the heating elements (note9) the main plumbing is connected (note10) and return plumbing
(note11) into the thermal accumulating vessel. The heat from the vessel is transmitted into the circuit of central heating or for heating up of the
heat exchanger. The heat accumulating vessel must be at least 50l/kW of the output for water of the fireplace insert.
Service inspection of the thermostatic valve
When the fireplace insert has been set away for a long time, it is necessary to check the function of the thermostatic valve. The
thermostatic valve ensures a safe operation of the boiler in the case of a fault of the heating system. This fault can be e.g. when the rating system is
frozen, etc. The right function is qualified by a sufficient pressure and sufficient cooling water rate. The water pressure must be min.2 bars and the flow
20 l/min for the cooling system.
It is necessary to do a test of the thermostatic valve before starting the system.
Unscrew the sensor of the thermostatic valve; put it into a dish with water of 100°C. The thermostatic valve must open the cooling
water flow before the temperature gets the boiling point. The water flow you can check on the water outlet into the discharge pipe. When water gets
cooler, the thermostatic valve must close the water flow. After the successful test, put the sensor back into the thermostatic valve.
When the test was not successful – the thermostatic valve was not opened – it is necessary to change it!
The thermostatic valve is not included as a part of the insert.
Mind the possibility of injury caused by hot water. It is forbidden to change the setting of the thermostatic valve or to fix it
Filling the system with water
It is necessary to add the valve on the cold water inlet pict.3, 4 pos. 2 for water inflow into the system. Water hardness must be
according to national standards. After filling the system with water, check all joints and their tightness. When you need to add some water into the
system, water in the system must be cold to protect the fireplace insert against the damage.
After the connection with the central heating system it is necessary to pressurize the whole system. There
must be a magnitude of the operating pressure, so that to eliminate the system water leak before the hot
water fireplace insert is put into the wall.
Brick veneer and thermal side and back wall insulation
The brick veneer and thermal insulation can be made after the suitable chimney connection.
Required brick veneer and thermal insulation
Minimal thermal insulation of protected building panels was defined during the test of
hot water
fireplace insert in accordance with EN 13229.
During the test the thermal insulation made of cellular calcium-silicate slabs was used ρ = 250kg/m³. It is necessary to use this kind of material in
the prescribed minimal thickness. Other insulation materials must be of the same or lower thermal conductivity and comparable thermal
resistance!
Brick veneer: a 10 cm thick mineral brick veneer must be made exactly on the protected building wall (back wall, where appropriate side wall).
The brick veneer must abut onto the insulation layer and on the protected building side. It must over-lap the connecting piece (venting) upwards
by at least 20 cm. The insulation brick veneer is not necessary when the building wall is 10 cm thick at least and is not made of combustible
material and it is not a long bearing reinforced concrete wall.
Ceiling of the room above the insert (brick veneer replacement): if the open space or the coating above the insert extends to the room ceiling,
it is necessary to protect the ceiling when it is made of combustible material or it serves as a carrying element. The protection consists of a 6 cm
(better is 10 cm) thick thermal insulation layer (insulation material index: 12.07.21.75.11 according to AGI Q 132). It is recommended to take this
preventive measure as a base intermediate floor (e.g. made of sheet metal) with the insulation material situated above it.
These preventative requirements have been set:
- *floor under the fireplace insert from flammable material
- **in case of using fireplace insert with insulating coating is insulation not needed
- ***in case of using fireplace insert with insulating coating min. distance can be reduced to 10mm
Thermal insulation: convection coating and convection access plate (outer contour of the facility) need to be coated from all sides by the
thermal insulation layer. The thermal insulation must be without joints and must overlap each other on the sides. If these insulating boards are not
fixed on walls, on coating or on abutting boards, it is necessary to fix them about 30 cm apart. The coating inwards the room (aperture) does not
need to be insulated when the insert is designed in such a way that the coating surface and the surface of the wood storing chamber could reach a
maximum temperature of 85
ºC
. For surfaces made of mineral construction materials, except for the areas where objects could be detached, the
maximum temperature is 120
ºC
. Thermal insulation layers made of rock wool or comparable material must be thoroughly coated from the room
side and convection air area as a protection against fibre fraying.
Permitted thermal insulation material and material for brick veneer (minimal requirements)
o Thermal insulation: cellular calcium-silicate slabs ρ = 250kg/m
3
, mineral wood boards, ceramics fibre boards
o Brick veneer and surround: Liapor, bricks, concrete, no-fines concrete, stone
o Alternate brick veneers and thermal insulation material: must be authorized. They must also fulfil every requirement for thermal
insulation and surrounds. Further information about these construction materials can be obtained in specialized stores.
Fireplace insert connection
After insulation the fireplace insert can be connected by the connecting piece to the chimney. The fireplace insert is connected with the help of the
smoke flue made of sheet metal with the max. length of 1.5 m. the smoke flue must be provided with the safety pin to protect it against sliding. The
knee part of the flue pipe must be fitted with the service slot for cleaning. When the connecting piece goes through parts with combustion materials
(e.g. protective walls), it is necessary to keep instructions in compliance with national technical standards and regulations.
It is not allowed to put any other attachment which is not approved by the manufacturer into the chimney connection. There
must be a safety pin on the smoke flue bellmouth to prevent slippage or turning out!
Fireplace insert with pull-up system door must be veneered to allow service and repair works. Veneer in the top part above the door of fireplace
must be built up from easy demountable material (Calsil etc.), or there must be service opening in the place of bearing (grilles, thinning of coating
etc.). Frame in the front part of insert with pull-up system must be built-in in accordance with scheme (pict. 5). It allows later demounting in case
of pull up system service. Holes in the cover of the pull-up system have to be through so the air can pass and carry out the cooling of mechanism.
