Austrian projectsCustomised systems for heatingrenovation in the public building sector”Wiener Wohnen”with HERZHERZ Switch fix enables pipeconnection without crossoverVienna city council which is responsible for public building and the renovation of existing housing,known as "Wiener Wohnen", has been searching for an ideal solution for the new building and therenovation of heating systems in existing housings. A solution, which on the one hand reduces materialsand work time and on the other hand guarantees an energy saving and trouble-free operation.Another requirement of the tender was an attractive appearance.HERZ Armaturen was able to offer asolution which covered all the necessaryrequirements and offeredvarious product packages. Numerous houseinstallations in Vienna have been or willbe renovated by HERZ-Armaturen. Buildingpromoters and power suppliersthroughout Austria took note of the advantagesof these packages and similar projectshave therefore already been plannedin other provinces.Pipe connection without crossoverand flush mountingPipe connection without crossover is one ofthe major advantages of the HERZ connectionsystems. Thanks to these systems youcan save time and material expenses can bereduced. By using distributors for flushmounting for radiator connections there isno need to use connection pieces for flooror wall mounting. Leaky parts can thereforebe avoided and the longevity ensured.PROJECTS:Mühlschüttelgasse residential installation, Vienna 21Executing plumber: Huber company, Vienna 11Approximately 300 connection systems (approximately 60apartments), finished in March 2005.Ehammgasse residential installation, Vienna 11approximately 300 connection systems (approximately 60 flats),Executing plumber: ERGE Beranek, Vienna 11,currently under construction.Executing plumber: Caliqua companyapproximately 250 connection systems (approximately 40housing units), currently under construction.Clean appearance andeasy maintenanceWhen pipes are installed in the floor or walland the radiator connection is flush mounted,the tubes are “invisible”. In the case ofnecessary maintenance works, equipmentcan be accessed from the wall. Simply openingthe lid of the covering box avoids thedifficulty of opening the wall or floor.A pressure test of the heatingsystem is possible without theradiatorBy flush mounting and the use of shut-offconnection systems the radiator connectionsmay be completed during the rawconstruction phase. Using HERZ Switchfix, the flow and return can be individuallyset which means further simplification ofthe installation planning. The radiators nolonger have to be installed during the rawconstruction phase for pressure testing,then having to be removed again. Using thenew method, the radiatorsare only mounted once allpaint work is completed .This saves valuable time andstorage costs.Installation in pictures(Project “Mühlschüttelgasse”, HERZ doubleconnection distributor)Customised product solutionsfor any renovationeventualityHERZ offers various packagesto cover the different requirementsof the dwellings to be renovated.All these packages includea thermostatic valve andthermostatic head, a connectionsystem for radiators, one pipe, press fittingand screw coupling (one piece each). Mostof the variants are flush mounted. If skirtingboards and a skirting board connection distributorare used, surface installation is necessary.The two most common variants of the customisedproduct packages are, on the onehand, the one using a HERZ reverse distributorfor dual-pipe systems – the HERZ-Switch4 3/2005
Products and innovationsfix, and on the other hand, the HERZ doubleconnection distributor for dual-pipe systems.Both sets are suitable for pipe connections withoutcrossover. Additionally, the Switch fixcan be shut-off and you can switch betweenflow and return.VARIANT 1HERZ Switch fix reverse distributor(1 3030 01)■ Double connection distributor, verticalpipe mounting in floor■ The connection system is mounted in theflush box■ Choice between flow and return, shutofffunction■ Threaded pipe connection 4 x G 3/4 withcone and 2 x G 3/4 with cone on the radiatorside, according to DIN V3838■ Including flush box and coverVARIANT 2HERZ double connection distributor(1 4133 01)■ Double connection distributor, verticalpipe mounting in floor■ Threaded pipe connection 4 x G 3/4 withcone and on radiator side 2 x G 3/4 withcone, according to DIN V3838■ Flush box and coverVARIANT 3A variant withhorizontal walloutlet is currentlybeingplanned. Usingthis variant thepipes are installeddirectly inthe wall and thefloor coveringneed not be removed.NEW: HERZ Mini thermostatichead (1 9200 69) for MMA valvesEasy to retrofit and change!HERZ Minimounted onMMA valveBetween 1980 and 2000, MMA valves(Markaryds Metal Armatur), producedby Stelrad Radiatoren GmbHhave been widely used in Austria. For theversions HB45, TAG, D12, E12, etc., HERZnow offers its own version of the Mini thermostatichead (item number 1 9200 69)The new HERZ Mini MMA thermostatic headcan be used without an adapter to replacethe MMA head and it can be installedon the existing lance valve.which can be used to replace the Makarydheads. The new HERZ Mini MMA – withoutadapter – is suitable for■ all MMA thermostatic valves, versions1988 and later■valves and valve connection systems forStelrad TPAV and TCV up to 1994 versionsThe turbulator valve with hand wheel, modelStelrad HB45, versions 1982 to 1989, which isused in Austria, can be retrofitted with the MiniMMA thermostatic head.■ valves and valve connection systems forthermopanel radiator versions from 1992and later■ valves and valve connection systems forAGA/Stelrad Compact 32/2, modelsfrom 1978 to 1990.Mini MMA technical data■ M 28 x 1.5 threaded connection■ Freely moving nut, across flat HEX 30■ MMA closing dimension■ Zero position, frost release at approx.6°C, adjustable■ Set value range 6–30 °C■ Limitation and locking of nominalvalue range3/2005 5