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EP0000584A1 - Connecting unit for liquid heater - Google Patents

Connecting unit for liquid heater Download PDF

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Publication number
EP0000584A1
EP0000584A1 EP78100519A EP78100519A EP0000584A1 EP 0000584 A1 EP0000584 A1 EP 0000584A1 EP 78100519 A EP78100519 A EP 78100519A EP 78100519 A EP78100519 A EP 78100519A EP 0000584 A1 EP0000584 A1 EP 0000584A1
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EP
European Patent Office
Prior art keywords
installation block
liquid
edges
connection
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP78100519A
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German (de)
French (fr)
Inventor
Hans Dr. Viessmann
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/142—Connecting hydraulic components
    • F24H9/144—Valve seats, piping and heat exchanger connections integrated into a one-piece hydraulic unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/105—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system pumps combined with multiple way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 

Definitions

  • the invention relates to an installation block for a liquid heater, in particular a heating boiler, for connecting the heater to the flow and return connections as well as pumps, Trermosten and reusable valves.
  • Installation blocks enable the connection of the liquid heaters, in particular heating boilers, to the heating circuit in heating system construction.
  • connection flanges since all connection areas must be processed in the form of connection flanges. As far as this known installation block consists of pressed parts, which is also provided, appropriate sealing must be provided.
  • connections have so far been assigned to the device by arranging line systems on the device which are device-specific from a more or less large number of, for example, pipe sections, branches, elbows or the like by flanging, screwing or welding, in the installation of pumps and valves must also be taken into account.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating an installation block for heating devices of the type mentioned, which is much easier to manufacture with less material and cost, and accordingly also offers the possibility of being designed as a multiple heating circuit distributor and which can be easily assigned to the device in question by welding without special sealing measures.
  • the cost saving when using steel sheet is more than 50 %.
  • the weight of an installation block made of sheet steel according to the invention is only about 20 % of that of cast iron. Since the cutting and embossing of the two sheet metal shells, including the fittings and pipe connections, can be carried out in one operation and, for example, flange surface machining and special sealing problems can be completely eliminated, the manufacturing effort is reduced considerably. In consideration of this, it is also easily possible to design such an installation block as a heating circuit distributor for several heating circuits in one operation, with the corresponding characteristics. Apart from this, the design according to the invention allows an almost fully automatic machine production.
  • device-specific individual channels 1 are shaped and welded to one another, welded together, which occurs on the one hand on the left of the channel edges 9 and on the peripheral edges 13 of the component.
  • Roll seam welding is preferably used for the channel edges 9. In areas that do not necessarily have to be absolutely tight to one another, spot welding may also suffice.
  • connection for a circulating pump 14 is located at the top left, (in FIG. 2) a suitable seat piece 15 is inserted in the shell 8 into the punched-out shell opening for the flange connection of the pump and is welded or soldered.
  • the circulation pump 14 is screwed onto the embossed flanges 17 of the seat piece 15, which can remain unprocessed, only with the interposition of a sealing ring 16.
  • the inflow to the circulation pump 14 takes place from the heating return HR and then goes from the pump to the boiler return KR (see also FIG. 2).
  • openings 21 are advantageously provided wherever connections are to be provided (see FIG. 2.7) in the adjacent shell, which are initially without a cover 22 after the prefabricated component has been plugged on in the sense of FIG 6 on the pronounced connecting pieces 23, keep the connecting edges free for liquid-tight connection. After the connection, the covers 22 are simply pressed in and likewise closed along their edges in a liquid-tight manner.
  • Such an installation block which can largely be manufactured automatically in the same sense as the device to which it is to be assigned, provides, on the one hand, an element which, in particular, simplifies and simplifies final assembly, in contrast to the usual connection to individual elements.
  • FIG 8 and 9 illustrate an installation block with the same construction principle, to which several heating circuits can advantageously be connected to the upper connections HV and HR.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

In an installation block for the connection of a liquid heater to the heating circuit and for the connection of elements which require operation, such as circulating pumps (14), thermostatic and multi-way valves (20) and the like, but also for the flow-favourable design of the channels conducting the liquid and the arrangement of bypass channels (19'), a double wall (2) is provided, which, for the purpose of avoiding sealing inserts, is formed from sheet steel shells (7, 8) which are stamped out in the channel regions and which are connected along the channel edges (9) in a liquidproof manner by means of welding, connectors for the adjustment and control devices (14, 18, 20) being provided in the channel regions.

Description

Die Erfindung bezieht sich auf einen Installationsblock für einen Flüssigkeitserhitzer, insbesondere Heizungskessel, zur Verbindung des Erhitzers mit den Vor- und Rücklaufanschlüssen sowie Pumpen, Trermostet- und Mehrwegventilen.The invention relates to an installation block for a liquid heater, in particular a heating boiler, for connecting the heater to the flow and return connections as well as pumps, Trermosten and reusable valves.

Installationsblöcke ermöglichen im Heizungsanlagenbau die Verbindung der Flüssigkeitserhitzer, also insbesondere von Heizungskesseln mit dem Heizungskreis.Installation blocks enable the connection of the liquid heaters, in particular heating boilers, to the heating circuit in heating system construction.

Es ist ein Installationsblock gemäß dem Oberbegriff des Patentanspruches 1 bekannt (DD-PS 63 141),der den Zusammenbau der herzustellenden Verbindung aus Einzelelementen, wie Fittings od. dgl. entbehrlich macht, der aber aus Guß besteht, demgemäß entsprechend schwer ist, komplizierte Gußformen und einen hohen Fertigungsaufwand verlangt.There is an installation block according to the preamble of claim 1 known (DD-PS 63 141), which makes the assembly of the connection to be made of individual elements, such as fittings or the like. Unnecessary, but which is made of cast iron, is accordingly heavy, complicated molds and requires a high manufacturing cost.

da alle Anschlußbereiche in Form von Anschlußflanschen bearbeitet werden müssen. Soweit dieser vorbekannte Installationsblock aus Preßteilen besteht, was auch vorgesehen ist, muß für entsprechende Abdichtung gesorgt werden.since all connection areas must be processed in the form of connection flanges. As far as this known installation block consists of pressed parts, which is also provided, appropriate sealing must be provided.

Neben der Verwendung von solchen Installationsblöcken, wurden Verbindungen bisher durch Anordnung von Leitungssystemen am Gerät, die gerätespezifisch aus einer mehr oder weniger großen Anzahl von beispielsweise Rohrstücken, Abzweigungen, Krümmern od. dgl. durch Anflanschen, Verschrauben oder Verschweißen dem Gerät zugeordnet werden, wobei in der Regel auch der Einbau von Pumpen und Ventilen zu berücksichtigen ist.In addition to the use of such installation blocks, connections have so far been assigned to the device by arranging line systems on the device which are device-specific from a more or less large number of, for example, pipe sections, branches, elbows or the like by flanging, screwing or welding, in the installation of pumps and valves must also be taken into account.

Für die Anbringung von Temperaturfühlern müssen ferner am Gerät selbst entsprechende Montagemöglichkeiten vorgesehen werden. Gute Strömungsverhältnisse sind dabei in den Leitungssystemen meist nicht zu verwirklichen, da man in der Regel auf verfügbare Rohrleitungselemente (Fittings od. dgl.) zurückgreift.Appropriate mounting options must also be provided on the device itself for the attachment of temperature sensors. Good flow conditions are usually not feasible in the piping systems, since generally available piping elements (fittings or the like) are used.

Mit dieser heute noch üblichen Art der Gerätekomplettierung ist insbesondere ein beträchtlicher Montageaufwand verbunden, der an sich is keinem vernünftigen Verhältnis zur Fertigung der Geräte selbst steht, die heute weitestgehend automatisiert erfolgen kann.This type of device completion, which is still common today, is associated in particular with a considerable amount of assembly work, which in itself is not a reasonable relationship to the manufacture of the devices themselves, which today can be largely automated.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, einen Installationsblock für heizungstechnische Geräte der genannten Art zu schaffen, der wesentlich einfacher mit geringerem Material- und Kostenaufwand herstellbar ist, der demgemäß auch die Möglichkeit bietet, als Mehrfachheizkreisverteiler ausgebildet zu werden und der durch Verschweißen ohne besondere Abdichtungsmaßnahmen in einfacher Weise dem betreffenden Gerät zugeordnet werden kann.The invention seeks to remedy this. The invention, as characterized in the claims, solves the problem of creating an installation block for heating devices of the type mentioned, which is much easier to manufacture with less material and cost, and accordingly also offers the possibility of being designed as a multiple heating circuit distributor and which can be easily assigned to the device in question by welding without special sealing measures.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daB lediglich zwei durch Pressen herzustellende Schalen zusammenzufügen und ohne besondere Dichtungselemente durch Schweißung flüssigkeitsdicht miteinander zu verbinden sind.The advantages achieved by the invention are essentially to be seen in the fact that only two shells to be produced by pressing are to be joined together and are to be connected to one another in a liquid-tight manner by welding without special sealing elements.

Es liegt auf der Hand, das bei einer solchen erfindungsgemäßen Ausbildung ohne weiteres auch optimalen Strömungsverhältnissen Rechnung getragen werden kann, insbesondere was die Krümmungsbereiche und die AnschluBbereiche für anzuschlie-Bende bzw. einzusetzende Zusatzelemente betrifft.It is obvious that with such a design according to the invention, optimal flow conditions can also be taken into account without any problems, in particular as regards the areas of curvature and the connection areas for additional elements to be connected or used.

Allein materialkostenmäßig beträgt die Kosteneinsparung bei der Verwendung von Stahlblech mehr als 50%. Ferner beträgt das Gewicht eines erfindungsgemäßen Installationsblockes aus Stahlblech nur etwa 20% eines solchen aus Guß. Da man Zuschnitt und Prägung der beiden Blechschalen ein schließlich der Armaturen- und Leitungsanschlüssen in einem Arbeitsgang vollziehen kann und bspw. Flanschflächenbearbeitungen und besondere Dichtungsprobleme ganz in Wegfall kommen, reduziert sich der Fertigungsaufwand in beträchtlichem Umfang..In Rücksicht darauf ist es auch ohne weiteres möglich, bei entsprechender Prägung einen solchen Installationsblock auch als Heizkreisverteiler für mehrere Heizkreise in einem Arbeitsgang auszubilden. Abgesehen davon läßt die erfindungsgemäße Ausbildung eine nahezu vollautomatisch maschinelle Fertigung zu.In terms of material costs alone, the cost saving when using steel sheet is more than 50 %. Furthermore, the weight of an installation block made of sheet steel according to the invention is only about 20 % of that of cast iron. Since the cutting and embossing of the two sheet metal shells, including the fittings and pipe connections, can be carried out in one operation and, for example, flange surface machining and special sealing problems can be completely eliminated, the manufacturing effort is reduced considerably. In consideration of this, it is also easily possible to design such an installation block as a heating circuit distributor for several heating circuits in one operation, with the corresponding characteristics. Apart from this, the design according to the invention allows an almost fully automatic machine production.

Im folgenden wird die Erfindung anhand von Ausführungsbeispielen derstellenden Zeichungen näher erläutert. Es zeigen

Figure imgb0001
The invention is explained in more detail below with the aid of exemplary embodiments of the drawings. Show it
Figure imgb0001

Figure imgb0002
gerätespezifisch verlaufenden Einzelkanälen 1 geprägt und gegeneinandergelegt miteinander verschweißt sind, was einerseits links der Kanalränder 9 erfolgt und an den Umfangsrändern 13 des Bauelementes. Für die Kanalränder 9 kommt vorzugsweise Rollnahtschweißung in Frage. In Bereichen, die nicht unbedingt zueinander absolut dicht sein müssen, genügt auch ggf. eine PunktschweiBung.
Figure imgb0002
device-specific individual channels 1 are shaped and welded to one another, welded together, which occurs on the one hand on the left of the channel edges 9 and on the peripheral edges 13 of the component. Roll seam welding is preferably used for the channel edges 9. In areas that do not necessarily have to be absolutely tight to one another, spot welding may also suffice.

Wie aus Fig. 1 erkennbar, sitzt links oben der Anschluß für eine Umwälzpumpe 14, wobei (siehe Fig. 2) in der Schale 8 in die mit ausgestanzte Schalenöffnung für den Flanschanschluß der Pumpe ein passendes Sitzstück 15 eingesetzt und verschweißt oder verlötet ist. Die Umwälzpumpe 14 ist lediglich unter Zwischenschaltung eines Dichtungsringes 16 auf die mitgeprägten Flansche 17 des Sitzstückes 15, die unbearbeitet bleiben können, aufgeschraubt. Der Zufluß zur Umwälzpumpe 14 erfolgt vom Heizungsrücklauf HR aus und geht dann von der Pumpe zum Kesselrücklauf KR (siehe auch Fig. 2).As can be seen from FIG. 1, the connection for a circulating pump 14 is located at the top left, (in FIG. 2) a suitable seat piece 15 is inserted in the shell 8 into the punched-out shell opening for the flange connection of the pump and is welded or soldered. The circulation pump 14 is screwed onto the embossed flanges 17 of the seat piece 15, which can remain unprocessed, only with the interposition of a sealing ring 16. The inflow to the circulation pump 14 takes place from the heating return HR and then goes from the pump to the boiler return KR (see also FIG. 2).

Figure imgb0003
Figure imgb0003

(bei entsprechender Vergrößerung des Bauelementes) mit Anschlüssen für einen Brauchwasserbereiter vorgesehen sein.(with a corresponding enlargement of the component) with connections for a water heater.

Unabhängig davon, welche gerätespezifische Ausbildung der Installationsblock hat, werden vorteilhaft überall dort, wo Anschlüsse vorzusehen sind, (siehe Fig. 2,7) in der benachbarten Schale Öffnungen 21 vorgesehen, die zunächst ohne Deckel 22 nach Aufstecken des vorgefertigten Bauelementes im Sinne der Fig. 6 auf die ausgeprägten AnschluBstutzen 23 die AnschluBbordränder zum flüssigkeitsdichten Verbinden freihalten. Nach dem Verbinden werden die Deckel 22 einfach eingedrückt und ebenfalls flüssigkeitsdicht längs ihrer Ränder verschlossen.Regardless of the device-specific design of the installation block, openings 21 are advantageously provided wherever connections are to be provided (see FIG. 2.7) in the adjacent shell, which are initially without a cover 22 after the prefabricated component has been plugged on in the sense of FIG 6 on the pronounced connecting pieces 23, keep the connecting edges free for liquid-tight connection. After the connection, the covers 22 are simply pressed in and likewise closed along their edges in a liquid-tight manner.

Ein solcher Installationsblock, der weitestgehend im gleichen Sinne wie das Gerät, dem er zuzuordnen ist, automatisch gefertigt werden kann, stellt im Gegensatz einerseits zur üblichen Anschlußverbindung an Einzelelementen ein insbesondere die Endmontage erleichterndes und vereinfachendes Element der,Such an installation block, which can largely be manufactured automatically in the same sense as the device to which it is to be assigned, provides, on the one hand, an element which, in particular, simplifies and simplifies final assembly, in contrast to the usual connection to individual elements.

dem ohne Schwierigkeiten Pumpen, Ventile od. dgl. Elemente vor oder nach der Verbindung mit dem wärmetechnischen Gerät in einfachster Weise zugeordnet werden können und andererseits bietet ein solcher Installationsblock gegenüber selchem aus Guß beträchtliche Vorteile hinsichtlich Material-, Gewichts- und Fertigungsaufwand.which can easily be assigned to pumps, valves or the like. Elements before or after the connection to the thermal device, and on the other hand, such an installation block offers considerable advantages in terms of material, weight and production costs compared to cast iron.

In den Fig. 8 und 9 ist ein Installationsblock mit dem gleichen Bauprinzip verdeutlicht, an dem vorteilhaft mehrere Heizkreise an den oberen Anschlüssen HV und HR angeschlossen werden können.8 and 9 illustrate an installation block with the same construction principle, to which several heating circuits can advantageously be connected to the upper connections HV and HR.

Claims (3)

1. Installationsblock für einen Flüssigkeitserhitzer, insbesondere Heizungskessel, zur Verbindung des Erhitzers mit den Vor- und Rücklaufanschlüssen sowie Pumpen (14), Thermostat- und Mehrwegventilen, bestehend aus einer in Einzelkanäle aufgegliederten Doppelwand (2) mit Anschlüssen (KR,KV,HR, HU) für die Flüssigkeitszu- und Ableitung sowie die Regel- und Steuerarmaturen, dadurch gekennzeichnet, daB die Doppelwand (2) aus in den Kesselbereichen ausgeprägten Blechschalen (7,8) gebildet ist, die längs der Kanalränder (9) flüssigkeitsdicht verbunden sind, wobei in den Kanalbereichen Anschlußstutzen für die Regel- und Steuervorrichtungen (14,18,20) vorgesehen sind.
Figure imgb0004
1.Installation block for a liquid heater, in particular a heating boiler, for connecting the heater to the flow and return connections as well as pumps (14), thermostatic and multi-way valves, consisting of a double wall (2) with connections (KR, KV, HR, HU) for the liquid supply and discharge as well as the regulating and control fittings, characterized in that the double wall (2) is formed from sheet metal shells (7, 8) which are pronounced in the boiler areas and are connected in a liquid-tight manner along the channel edges (9), whereby Connection pieces for the regulating and control devices (14, 18, 20) are provided in the channel areas.
Figure imgb0004
 5. Installationsblock nach Anspruch 4, dadurch gekennzeichnet, daß die Öffnungsränder für die Anschlußstutzen (23) nach innen und die Öffnungsränder der mit Deckeln (22) verschließbaren Öffnungen (21) nach außen gebördelt sind, wobei die Deckelränder entsprechend aufgebördelt sind.5. Installation block according to claim 4, characterized in that the opening edges for the connecting piece (23) inwards and the opening edges of the closable with lids (22) closable openings (21) are flanged to the outside, the lid edges being flanged accordingly. 6. Installationsblock nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Einzelkanäle mit mehreren Heizvorlauf- und Heizrücklaufstutzen (HV,HR) verbunden sind.6. Installation block according to claim 1 to 5, characterized in that the individual channels are connected to a plurality of Heizvorlauf- and Heizrücklaufstutzen (HV, HR).
EP78100519A 1977-07-30 1978-07-27 Connecting unit for liquid heater Withdrawn EP0000584A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2734553A DE2734553B1 (en) 1977-07-30 1977-07-30 Installation block for a liquid heater
DE2734553 1977-07-30

Publications (1)

Publication Number Publication Date
EP0000584A1 true EP0000584A1 (en) 1979-02-07

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EP78100519A Withdrawn EP0000584A1 (en) 1977-07-30 1978-07-27 Connecting unit for liquid heater

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AT (1) ATA525478A (en)
DE (1) DE2734553B1 (en)
IT (1) IT7822485V0 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236235A1 (en) * 1986-03-07 1987-09-09 ELETTRO TERMICA SUD S.p.A. Gas heater
EP0244915A2 (en) * 1986-05-09 1987-11-11 ING. A. BERETTA S.p.A. Integrated hydraulic circuit for hot-water heating boilers for heating and sanitary use
FR2606127A1 (en) * 1986-11-03 1988-05-06 Muller Cie Frame for a boiler, especially a wall-mounted boiler, for heating and for hot water for sanitary purposes
EP0268564A1 (en) * 1986-11-17 1988-05-25 Giorgio Scanferla A wall-mounted hot water boiler of the instant type
EP0563589A1 (en) * 1992-03-30 1993-10-06 Hans Dr. Viessmann Boiler
FR2706593A1 (en) * 1993-06-09 1994-12-23 Dietrich Thermique End interface module for boiler heater.
EP1235035A3 (en) * 2001-02-27 2003-07-23 Viessmann Werke GmbH & Co Manifold

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241536A1 (en) * 1982-11-10 1984-05-10 Grammer, Meinrad, Ing.(grad.), 7407 Rottenburg CONNECTING DEVICE FOR HEATING SYSTEMS
AT401298B (en) * 1992-11-03 1996-07-25 Montfort Beteiligungsgesellsch LINKED BOILERS FROM CAST LINKS
DE19719293A1 (en) * 1997-05-07 1998-11-12 Bosch Gmbh Robert Connection device for a wall heater
DE20105155U1 (en) 2001-03-25 2001-07-05 Viessmann Werke GmbH & Co., 35108 Allendorf Heating circuit distributor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD63141A (en) *
DE2052912A1 (en) * 1970-10-28 1972-05-04 Schwark, Hans-Friedrich, Dr., 8000 München Control device for hydraulic circuits
FR2211109A6 (en) * 1972-12-20 1974-07-12 Materiel Telephonique
FR2260762A1 (en) * 1974-02-08 1975-09-05 Vadstena Pumpar Ab

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD63141A (en) *
DE2052912A1 (en) * 1970-10-28 1972-05-04 Schwark, Hans-Friedrich, Dr., 8000 München Control device for hydraulic circuits
FR2211109A6 (en) * 1972-12-20 1974-07-12 Materiel Telephonique
FR2260762A1 (en) * 1974-02-08 1975-09-05 Vadstena Pumpar Ab

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236235A1 (en) * 1986-03-07 1987-09-09 ELETTRO TERMICA SUD S.p.A. Gas heater
US4756475A (en) * 1986-03-07 1988-07-12 Elettro Termica Sud S.P.A. Gas-fired boiler
EP0244915A2 (en) * 1986-05-09 1987-11-11 ING. A. BERETTA S.p.A. Integrated hydraulic circuit for hot-water heating boilers for heating and sanitary use
EP0244915A3 (en) * 1986-05-09 1988-05-11 ING. A. BERETTA S.p.A. Integrated hydraulic circuit for hot-water heating boilers for heating and sanitary use
FR2606127A1 (en) * 1986-11-03 1988-05-06 Muller Cie Frame for a boiler, especially a wall-mounted boiler, for heating and for hot water for sanitary purposes
EP0340370A1 (en) * 1986-11-03 1989-11-08 MULLER & CIE SOCIETE ANONYME DITE : Wall-mounted heater for heating and hot water production
EP0268564A1 (en) * 1986-11-17 1988-05-25 Giorgio Scanferla A wall-mounted hot water boiler of the instant type
US4917077A (en) * 1986-11-17 1990-04-17 Giorgio Scanferla Wall-mounted hot water boiler of the instant type
EP0563589A1 (en) * 1992-03-30 1993-10-06 Hans Dr. Viessmann Boiler
FR2706593A1 (en) * 1993-06-09 1994-12-23 Dietrich Thermique End interface module for boiler heater.
EP1235035A3 (en) * 2001-02-27 2003-07-23 Viessmann Werke GmbH & Co Manifold

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Publication number Publication date
IT7822485V0 (en) 1978-07-31
ATA525478A (en) 1982-06-15
DE2734553B1 (en) 1978-11-23

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