DE102010018427B4 - Solid fuel furnace and heating system and process water heating system with a solid fuel stove - Google Patents

Abstract

A solid fuel furnace (4) according to the invention comprises a combustion chamber (36) for burning solid fuel, in particular coal or wood; and at least one heating coil (30) through which a liquid heat transfer medium, in particular water, flows. At least one heating coil (30) can be moved between a heating position in a heat area of the combustion chamber (36) and a position at least partially outside the heat area of the combustion chamber (36).

Description

The invention relates to a solid fuel furnace and a heating system and a process water heating system with such a solid fuel furnace.

Solid fuel furnaces are usually understood to mean furnaces which are fired with solid fuel, in particular wood or coal. Solid fuel stoves are used for space heaters or central heating systems for heating a heating system. A solid fuel firing reaches its optimum efficiency only under full load, which results in the risk of overheating of the solid fuel furnace. An adaptation of the available heating power to the needs of the heat consumer of the heating system is done in modern heating systems in general on buffer memory, which store the excess heat produced and deliver it to the consumers of the heating circuit as needed. As a storage medium in a buffer memory usually water is used.

The use of a buffer storage or the provision of forced cooling of the heat transfer medium ensures that the solid fuel furnace always operates under ideal conditions and operating temperature and that there is no overheating of the solid fuel furnace.

A disadvantage of the use of heat buffers is the increased installation costs and the resulting additional costs for the purchase and maintenance of the heat buffer. In addition, the installation of heat buffers creates an increased space requirement for the heating system. Furthermore, the use of heat buffers has the disadvantage of the continuous heat loss through the buffer memory. Particularly disadvantageous are the heat losses in a heating system in which the solid fuel oven also serves as a space heater and is not used exclusively for feeding a heating system.

Another possibility known from the prior art for adapting the heating power to the demand of the heat consumer of a heating system is the forced cooling of the heat carrier of the system, wherein the heat carrier is mostly water. It can be dispensed with the additional installation of buffer storage in the heating system.

A forced cooling of the heat carrier requires additional energy input and is also disadvantageous in that the excess heat of the solid fuel furnace is not otherwise usable, such as for space heating.

The control of the heating power of a solid fuel furnace can be achieved with the devices known from the prior art only with considerable cost and installation costs.

From the EP 0 046 249 A2 For example, a boiler is known which is designed to be fired by oil or gas and has a water-cooled combustion tube which is closed at one end and located within a water space of the boiler. The boiler is connected to a solid fuel furnace by means of an auxiliary furnace, the auxiliary furnace having a combustion chamber with means for introducing solid fuel into the combustion chamber and an opening in the wall of the combustion chamber, the opening having an extension nozzle which extends thereof, wherein hot gases may pass from the extension nozzle of the furnace into the combustion tube of the boiler at a position between the ends of the combustion tube. The oven of EP 0 046 249 A2 has a water jacket surrounding the extension nozzle of the combustion chamber which extends into the boiler communicating with the solid furnace. On page 6, 5th paragraph of the EP 0 046 249 A2 It is disclosed that the oven may be provided with rollers or wheels to allow easy removal of the oven from the kettle for maintenance purposes.

Object of the present invention is to provide a cost-effective, space-saving and energy-efficient solution for controlling a solid fuel furnace and a heating system with a solid fuel furnace.

The object of the invention is achieved by a solid fuel furnace according to independent claim 1 and by a heating system according to independent claim 5 and by a service water heating system according to independent claim 9. Advantageous developments emerge from the dependent claims.

A solid fuel furnace according to the invention comprises a combustion chamber for combustion of solid fuel, in particular coal or wood, and a combustion air supply therefor. Furthermore, the solid fuel furnace according to the invention comprises at least one heating coil through which a liquid heat transfer medium flows. The heating coil can be part of a water register, which runs in the combustion chamber and is flowed through by the liquid heat transfer medium. Likewise, the heating coil can be formed by the entire water register.

A basic idea of the invention is that at least one heating coil between a heating position in a heat region of the combustion chamber and at least partially outside the Heat region of the combustion chamber located position is movable.

In the heating position, the heating coil is in the heat range of the combustion chamber of the solid fuel furnace, that the liquid heat transfer medium, which flows through the heating coil, is heated.

The position located at least partly outside the heat range of the combustion chamber is referred to below as the non-heating position. In the non-heating position located at least partially outside the heat range of the combustion chamber, the liquid heat carrier through which the heating coil flows is not or only insignificantly heated. The non-heating position may be in an edge region of the combustion chamber, outside the combustion chamber or partly in the combustion chamber and partly outside the combustion chamber.

The pivoting of the heating coil between the heating position and the non-heating position can take place in a translatory or rotational movement. The heating coil can, for example, be pivoted about an axis of rotation out of the combustion chamber or be moved out of the combustion chamber with a rectilinear movement.

Compared with conventional solid fuel furnaces, the heating coil is arranged movably within the combustion chamber of the solid fuel furnace. This makes it possible to move the heating coil out of the combustion chamber of the solid fuel furnace at a lower heating power requirement of the heating system. As a result, an emergency backup and a demand-dependent control of the heating power output of the solid fuel furnace to the heating circuit can be realized.

In addition, in contrast to conventional solid fuel stoves, only a small additional installation effort is necessary because it can be dispensed with the installation of a buffer tank or a forced cooling device. In addition, the invention provides an energetically more favorable solution, since even if the heating coil is arranged in the non-heating position, the heat of combustion of the solid fuel furnace for space heating can be used.

According to a first embodiment of the invention, the solid fuel furnace may comprise an energy store, in particular a spring, which is arranged and configured such that it can pivot or move the at least one heating coil from the heating position to the non-heating position.

The arrangement of an energy store for moving the heating coil between said positions allows a simple and inexpensive moving of the heating coil, without the need for an additional drive unit, such as an electric motor, needs to be provided.

Advantageously, the energy storage device, in particular the spring, can be activated in the solid fuel furnace according to the invention in the event of a power failure. This results in the advantage that in case of power failure, the heating coil is automatically moved to the non-heating position and thus can not occur overheating of the heating circuit of the heating system. The energy storage is therefore an emergency backup of solid fuel stove against overheating.

A further embodiment of the solid fuel furnace according to the invention comprises a drive motor, by means of which the at least one heating coil can be moved between the heating position and the non-heating position located at least partially outside the heat region of the combustion chamber.

According to a further embodiment of the solid fuel furnace according to the invention, the at least one heating coil can still be moved into one or more further positions than these two positions, for example in intermediate positions between the heating position and the non-heating position, in which the liquid heat carrier is heated to a lesser extent than in the heating position. As a result, the supply of heat can be adapted even more individually to the given heating power requirement.

The drive motor may for example comprise an electric motor and is advantageously arranged outside the heat range of the solid fuel furnace.

By arranging a drive motor, an automated method of the heating coil is possible. Advantageously, the drive unit is designed such that, depending on the heating power requirement of the heat consumer, the heating coil moves between the at least two positions.

According to another embodiment of the invention, the drive motor cooperates with the spring so that the spring is held in a biased position by the drive motor when the drive motor is in operation.

The bias of the spring by the drive motor makes it possible to use the spring as an emergency backup of the solid fuel stove against overheating, as in a failure of the drive motor, for example, by a power failure, the spring is no longer held by the drive motor and thus moving the heating coil into the non-heating position located at least partially outside the heat region of the combustion chamber.

The invention also relates to a heating system with a solid fuel furnace of the type described above, wherein the heating system has at least one heat consumer, in particular a radiator, a floor heating or a surface heater. The heat consumer is connected by means of at least one heat transfer circuit, in particular water circulation to the heating coil of the solid fuel furnace and supplied by this with the heated heat carrier. Furthermore, the heating system according to the invention includes a temperature sensor and a control unit, which is designed, in the case of a detected by the temperature sensor temperature of the heat carrier, which is above a reference value, the at least one heating coil from the heating position located in the at least partially outside the heat range of the combustion chamber To swing non-heating position.

By arranging a temperature sensor in the heating system, a constant monitoring of the temperature is possible. The reference value at which the heating coil is pivoted to the non-heating position can be set individually. Overheating of the heating system is thus reliably prevented.

To promote the heat carrier through the heating circuit of the heating system, at least one pump can be arranged in the heating system, which causes the circulation of the heat carrier. As a result, a uniform distribution of the heat absorbed in the solid fuel furnace by the heat transfer medium to the consumers of the heating circuit can be made possible.

According to a further embodiment of the heating system according to the invention with a solid fuel furnace, the control unit is further adapted, in the case of a temperature of the heat carrier detected by the temperature sensor, which is below a reference value, or in the case of a heat demand message, the at least one heating coil from the non-heating position to the heating position swing.

Furthermore, the invention relates to a service water heating system which comprises at least one service water consumer, for example a shower or a faucet. The consumers of domestic hot water are connected to the heating coil via conduits and are supplied with heated service water through them. The domestic water heating system further includes a temperature sensor and a control unit, which is designed, in the case of a temperature of the water detected by the temperature sensor, which is above a reference value, the at least one heating coil from the heating position to the non-heating position located at least partially outside the heat region of the combustion chamber to pan.

By setting a reference value at which the heating coil is moved to a non-heating position, in which the service water is not heated, it is possible to avoid overheating the domestic water heating system. The reference value of the process water is optimally below the boiling point of water.

The pivoting or movement of the at least one heating coil between the non-heating position and the heating-up position located at least partially outside the heat range of the combustion chamber can advantageously be effected by the drive motor.

The control unit of the heating system according to the invention can also be designed to activate the energy store, in particular the spring, in the event of a power failure, so that the latter pivots the at least one heating coil from the heating position into the non-heating position.

According to a further embodiment of the heating system according to the invention, a gas burner for heating the heat carrier or the service water may additionally be arranged.

Advantageously, in the at least one heat transfer circuit, a valve, in particular a controllable valve for interrupting the heat transfer circuit and / or for connecting the at least one heat consumer with the solid fuel furnace, provided with the gas burner or both. Likewise, a valve may be disposed in the conduits of the domestic water heating system to connect at least one of the service water consumers to the gas burner, the solid fuel oven, or both.

Furthermore, the invention relates to a combination of the described heating system and the process water heating system. The heating circuit and the lines of the process water heating system are connected to at least one heating coil in the solid fuel furnace.

Advantageously, in the combination of the described heating system and the process water heating system at least two separate heating coils are arranged in the solid fuel furnace, which proceed separately from each other, by separate control units and drive motors can be. As a result, different temperatures of the heat transfer medium and of the water can be set in the heating system and in the process water heating system.

Furthermore, it is conceivable to operate the heating circuit with process water in the combination of the described heating system and the service water heating system. In such an embodiment, it is possible to use only one heating coil for the combination of the two systems.

In addition, further combinations of the described heating system and the process water heating system are possible in which a plurality of heating systems and service water heating systems can be heated by heating coils in the solid fuel furnace and are separated from each other controllable.

The heating system can be advantageously formed without buffer memory, and the cost can be saved. Of course, a buffer memory can be provided.

The invention is explained in more detail below with reference to several embodiments with reference to the accompanying figures.

1 shows a heating system according to an embodiment of the invention in a schematic representation; and

2 shows an enlarged schematic representation of the solid fuel furnace of the heating system 1 according to an embodiment of the invention.

In the 1 shown heating system 2 includes a solid fuel furnace 4 for burning solid fuels, in particular wood or coal, the structure of which is described below with reference to 2 will be explained in more detail.

Through the combustion chamber of the solid fuel furnace 4 runs a heating coil, which via a solid fuel furnace return line 6 and via a consumer feed-in 16 as well as a consumer return 14 and a solid fuel feed line 8th to two exemplified heat consumers 10 . 12 connected. The heating coil may also be referred to as a water register, and it may be formed, for example, helical, helical, serpentine or helical. In the present embodiment, the heating coil comprises three exemplary illustrated, adjacent double-tube tube sections, the Hauptersteckungsrichtung is horizontal.

The heating circuit is - in the flow direction of the heat carrier - through the heating coil, the solid fuel furnace return line 6 , the consumer feed 16 , the heat consumer 10 . 12 , the consumer return 14 and the solid fuel feed line 8th educated.

In the pipes of the heating circuit of the heating system 2 there is a heat carrier, which is the heating coil 30 flows through it while being heated and the over the lines 6 and 16 to the heat consumers 10 and 12 is transported to release the heat there again. The heat transfer medium in the lines of the heating circuit can be water, but it is also suitable for any other heat transfer medium, which is able to absorb heat, store and deliver again.

The heating coil 30 thus serves to absorb heat from the furnace in the combustion chamber 36 of the solid fuel furnace 4 emitted heat and represents a heat source, which is the heating system 2 supplied with heating power.

With the heat consumers 10 . 12 it may, for example, be radiators, surface heating or underfloor heating, which deliver the heat energy transported via the heat carrier, for example, to a room.

In the in 1 illustrated embodiment are two heat consumers 10 . 12 arranged parallel to each other. It is also possible to integrate any number of heat consumers in the heating circuit and to arrange them in parallel or in series with each other.

In the event that of the heat consumers 10 . 12 required heating power the maximum heat output of the solid fuel stove 4 In addition, in an alternative embodiment, a gas burner may be included 20 be provided in the heating circuit, which can be activated as needed. The gas burner 20 serves in the heating system 2 as an additional source of heat next to the solid fuel stove 4 , And he offers the advantage of a relatively accurately adjustable by the gas supply heating power. In the illustrated embodiment, the gas burner 20 via a gas burner inlet 22 with the consumer return 14 and via a gas burner return 24 with the consumer supply 16 connected.

In this embodiment, the heating circuit comprises, in addition to the heating coil, the solid fuel furnace return line 6 , the consumer feed 16 , the heat consumer 10 . 12 , the consumer return 14 and the solid fuel feed line 8th also the gas burner 20 , the gas burner inlet 22 and the gas burner return 24 ,

At the in 1 shown heating system 2 can the gas burner 20 be replaced by any other suitable unit for generating heat energy. For example, the additional heating power could also be provided by an oil heater or another solid fuel furnace. In addition, it is also conceivable to integrate several additional units for generating heating power in the heating circuit, which can be arranged in parallel or in series with each other.

The energy required connection of the gas burner 20 in the heating circuit can have a in 1 illustrated valve 18 respectively. The valve 18 can be controlled manually or electrically to the heat from the gas burner 20 to the heat consumers 10 . 12 to regulate.

The heating system 2 of the 1 can also have a pump, not shown, which circulates the heat carrier, and a control unit, not shown, which the valve 18 , the gas burner 20 , the movable heating coil, as described below with reference to 2 is described, and possibly controls the pump.

2 shows an enlarged schematic representation of the solid fuel furnace 4 ,

The solid fuel stove 4 includes a furnace housing 34 that has a combustion chamber 36 encloses in which solid fuels are fired. In the combustion chamber 36 is a heating coil 30 arranged by an optional conversion 26 surrounded, which is the heating coil 30 from the one in the combustion chamber 36 separated firing and has a heat-permeable, heat-resistant material.

At the heating coil 30 is also an energy storage 28 arranged, which may comprise a spring or may be formed as a spring. In the illustration in 2 is the spring 28 outside the solid fuel furnace 4 , The feather 28 but also within the Heizwendelumwandung 26 or in the combustion chamber 36 of the solid fuel furnace 4 be arranged, provided that it is made of a corresponding heat-resistant spring wire.

The energy store or the spring 28 who is in 2 is shown schematically, represents an emergency backup of the heating circuit and has the function, the heating coil 30 if necessary, from the combustion chamber 36 to move.

The energy store or the spring 28 can be between a range of heating coil 30 be arranged and a stationary point and, for example, be activated by releasing a lock in an emergency, so that the energy storage or the spring 28 the heating coil 30 from the combustion chamber 36 moved out.

Alternatively, as shown in 2 is shown, the spring 28 be designed as a tension spring and with its first end to the Heizwendelumwandung 26 or on the heating coil 30 be attached and with its second end to a fixed point outside the furnace housing 34 be arranged. Furthermore, it is a drive motor 32 provided, which is the tensile force of the spring 28 counteracts by the same amount of force in the opposite direction to the first end of the spring 28 or on the Heizwendelumwandung 26 or the at the heating coil 30 Apply and the spring 28 so keeps in a prestressed state. In addition, the drive motor includes a motor brake, which ensures the prestressed state of the spring without permanent current loading of the drive motor. This makes it possible to de-energize the drive motor when it is not needed for moving the heating coil and to bias the spring through the motor brake. This is in 2 through in the horizontal direction from the left side of the drive motor 32 until the right outer wall of the Heizwendelumwandung 26 extending and to the left against pushing rod 29 outlined.

The bias of the spring 28 acts on the heating coil 30 that the heating coil 30 In an emergency, a force is applied to the heating coil 30 from the combustion chamber 36 the solid fuel stove 4 moved out.

In the operating state of the drive motor 32 push the rod 29 of the drive motor 32 against the right outer wall of the Heizwendelumwandung 26 , thus applying a force against the spring force, thus preventing a process of the heating coil 30 through the spring 28 ,

Will the drive motor 32 the engine brake switches off or releases its holding force, for example in the event of a power failure, presses the rod 29 no longer against the right outer wall of the Heizwendelumwandung 26 and the heating coil 30 is by the spring 28 from the combustion chamber 36 of the solid fuel furnace 4 also promoted.

Carrying out the heating coil 30 from the combustion chamber 36 of the solid fuel furnace 4 in case of failure of the drive motor 32 serves to protect against overheating of the heating circuit of the heating system 2 ,

The heating coil 30 can thus be moved between two positions, with the heating coil 30 in a first heating position with its entire area inside the combustion chamber 36 of Solid fuel fire 4 and, in a second non-heating position, at least part of its area outside the combustion chamber 36 lies.

The heating coil 30 is in its first heating position so within the Heizwendelumwandung 26 arranged that the largest possible surface of the heat carrier in the combustion chamber 36 heat is exposed.

The heating coil wall 26 Can be fixed or movable in the combustion chamber 36 of the solid fuel furnace 4 be arranged.

A movable heating coil wall 26 is designed so that this with the heating coil 30 moves, but does not move completely out of the combustion chamber, since the Heizwendelumwandung 26 an escape of flue gas from the combustion chamber 36 should prevent.

A movable heating coil wall 26 can with the heating coil 30 be firmly connected and so far from the combustion chamber 36 be moved out, that the back wall of the conversion 26 flush with the oven housing 34 completes and the combustion chamber 36 against the ambient air outside the solid fuel furnace 4 seals.

The heating coil wall 26 can also be stuck in the combustion chamber 36 of the solid fuel furnace 4 be arranged. In this case, the heating coil 30 within the transformation 26 movable to the Heizwendelumwandung 26 educated.

In an alternative embodiment, the heating coil 30 even without the Heizwendelumwandung 26 be executed. In this case, the heating coil 30 for example, by a resealable opening from the combustion chamber 36 of the solid fuel furnace 4 be moved.

The optional on the solid fuel stove 4 provided drive motor 32 may further be formed so that it the heating coil 30 moved to this, for example, from the solid fuel furnace 4 out or into the solid fuel oven 4 to move in. The drive motor 32 is advantageously outside the solid fuel furnace 4 attached to not the inside of the solid fuel furnace 4 exposed to existing heat.

In the drive motor 32 it may be, for example, an electric motor which is connected to an external circuit. Furthermore, other drive mechanisms are conceivable in which, for example, the waste heat of the solid fuel furnace 4 used for the drive.

In addition to the emergency backup, the in 2 illustrated drive motor 32 also be provided, the heating coil 30 between the heating position within the combustion chamber 36 of the solid fuel furnace 4 and at least partially outside the combustion chamber 36 to move the non-heating to the heating coil 30 the heating circuit of the heating system 2 regulate and control supplied heating power.

The process of heating coil 30 takes place according to the embodiment of 2 in a translational movement according to the drawer principle, in which the heating coil 30 together with the Heizwendelumwandung 26 from the combustion chamber 36 of the solid fuel furnace 4 out and back into the combustion chamber 36 is moved into it. The heating coil wall 26 seals the combustion chamber 36 of the solid fuel furnace 4 against the ambient air outside the solid fuel furnace 4 to prevent smoke from reaching the surroundings.

A second possibility, which is not shown here, is the heating coil 30 to move with a rotational movement. This is the heating coil 30 about an axis of rotation, which is outside or inside the solid fuel furnace 4 can be located, pivoted and in this way between an at least partially outside the solid fuel furnace 4 located non-heating position and a heating position within the solid fuel furnace 4 method.

Optionally, the heating coil 30 be moved into several fixed intermediate positions or continuously. For example, positions could be approached in which the heating coil 30 located between the two described positions and with a certain area ratio within the combustion chamber 36 of the solid fuel furnace 4 lies. As a result, the output of the heating power in the heating circuit of the heating system 2 be controlled more precisely in several stages.

In the presentation of 2 becomes the entire heating coil 30 moves, resulting in a flexible design of the connection areas of the solid fuel feed line 8th and the solid fuel furnace return 6 to the heating coil 30 requires. It is also possible, only a portion of the heating coil 30 For example, to move one or two Doppelschlangerohrabschnitte so as to control or reduce the heat absorption by the heat transfer medium. In this case, the connection regions between the stationary remaining double-coil tube sections and the moving double-loop tube sections are to be correspondingly flexible.

LIST OF REFERENCE NUMBERS

2

heating system

4

Solid fuel stove

6

Solid fuel stove supply

8th

Solid fuel stove return

10

first heat consumer

12

second heat consumer

14

load supply

16

Consumers return

18

Valve

20

gas burner

22

Gas burner supply line

24

Gas burner return

26

Heizwendelumwandung

28

Energy storage / spring

29

pole

30

heating coil

32

drive motor

34

furnace housing

36

combustion chamber

Claims (15)

Solid fuel furnace ( 4 ), having a combustion chamber ( 36 ) for burning solid fuel, in particular coal or wood; and at least one heating coil ( 30 ), which is traversed by a liquid heat transfer medium, in particular water; wherein at least one heating coil ( 30 ) between a heating position in a heat region of the combustion chamber ( 36 ) and at least partially outside the heat range of the combustion chamber ( 36 ) Position is movable to provide an emergency backup and a demand-dependent control of the heating power output of the solid fuel furnace to a heating circuit and / or at least one hot water consumer. Solid fuel furnace according to claim 1, wherein an energy store ( 28 ), in particular a spring, is provided, through which the at least one heating coil ( 30 ) from the heating position to the outside of the heat range of the combustion chamber ( 36 ) Position is pivotable or movable. Solid fuel furnace according to claim 2, wherein the energy store ( 28 ), in particular the spring, can be activated in the event of a power failure. Solid fuel furnace according to one of the preceding claims, wherein a drive motor ( 32 ) is provided, through which the at least one heating coil ( 30 ) from the heating position to the outside of the heat range of the combustion chamber ( 36 ) and / or from outside the heat range of the combustion chamber ( 36 ) located position in the heating position is pivotable or movable. Solid fuel furnace according to claim 4, wherein the drive motor ( 32 ) so with the energy storage ( 28 ) cooperates, that the energy storage ( 28 ) by the drive motor ( 32 ) is maintained in a biased position when the drive motor ( 32 ) is in operation and in case of failure of the drive motor ( 32 ) or in case of power failure of the energy storage ( 28 ) the heating coil ( 30 ) is moved into the position at least partially outside the heat range of the combustion chamber. Solid fuel furnace according to claim 4, wherein the drive motor ( 32 ) has an engine brake through which the energy storage ( 28 ) is maintained in a preloaded position when the engine brake is in operation and in the event of a motor brake failure or power failure, the energy storage ( 28 ) the heating coil ( 30 ) is moved into the position at least partially outside the heat range of the combustion chamber. Heating system ( 2 ) with a solid fuel furnace ( 4 ) according to one of the preceding claims, comprising: at least one heat consumer ( 10 . 12 ), in particular a radiator, a floor heating or a surface heating element, by means of at least one heat transfer circuit, in particular water circulation, to the heating coil ( 30 ) of the solid fuel furnace ( 4 ) is connected and supplied by this heated with heat transfer medium; a temperature sensor; and a control unit, which is designed, in the case of a temperature of the heat carrier detected by the temperature sensor, which is above a reference value, the at least one heating coil ( 30 ) from the heating position to the outside of the heat range of the combustion chamber ( 36 ) position or to move. Heating system according to claim 7, wherein the control unit is further adapted, in the case of a detected by the temperature sensor temperature of the heat carrier, which is below a reference value, or in the case of a heat demand message the at least one heating coil ( 30 ) from outside the heat zone of the combustion chamber ( 36 ) position in the heating position or to move. Service water heating system with a solid fuel furnace ( 4 ) according to one of claims 1 to 6 comprising: at least one hot water consumer, in particular a shower, which by means of lines to the at least one heating coil ( 30 ) of the solid fuel furnace ( 4 ) is connected and supplied by this with heated hot water; a temperature sensor; and a control unit which is designed, in the case of a temperature of the water detected by the temperature sensor, which is above a reference value, the at least one heating coil ( 30 ) from the heating position to the outside of the heat range of the combustion chamber ( 36 ) position or to move. Plant according to one of claims 7 to 8 or 9, wherein the pivoting of the at least one heating coil ( 30 ) between the outside of the heat range of the combustion chamber ( 36 ) position and the heating position by the drive motor ( 32 ) he follows. Installation according to one of claims 7 to 8 or one of claims 9 to 10, wherein the control unit is further adapted, in the event of a power failure, the energy storage ( 28 ), in particular to activate the spring, so that this / these the at least one heating coil ( 30 ) from the heating position to the outside of the heat range of the combustion chamber ( 36 ) pivoted or moved. Installation according to one of claims 7 to 8 or one of claims 9 to 11, wherein additionally a gas burner ( 20 ) is provided for heating the heat carrier or the water. Installation according to one of claims 7 to 8 or 12, wherein in / in the at least one heat carrier circuit or the / a line a valve ( 18 ), in particular a controllable valve, for interrupting the heat carrier circuit or the line and / or for connecting the at least one heat consumer ( 10 . 12 ) or the at least one service water consumer with the solid fuel furnace ( 4 ), with the gas burner ( 20 ) or provided with both. Installation according to one of claims 7 to 8, wherein the heating system ( 2 ) is formed without buffer memory. Combined heating and service water heating system, comprising a heating system according to claim 7 and a service water heating system according to claim 9.

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