Mounting the low loss header 6 720 647 3b 201108 3. Buderus 7746900400 single boiler low loss header kit single boiler kit, low loss header with am10 weather compensation module must purchase with single boiler install. Heating design guide 2010 to calculate the flow rate and choose a suitable pipe size. To achieve hydraulic separation you need a lowloss header or traditional primarysecondary piping. Low loss header wh160 for flow rates of 12000 lhr dn65 pn7. Low loss header what it actually does why should i fit a low loss header. Vaillant ecotec 65kw commercial boiler wall hung regular commercial boiler the vaillant 65kw ecotec is a sedbuk a rated wall hung, condensing commercial bolier. Confirm proper pump sizing and operation for both boiler trim and dhw. After reading about low loss headers here i am wondering if this is the issue we are having, we have a rinnai boiler, installed last year by our company,with a low loss header and piped to the book, we had 3 zones all with circ, 1x 1radiant and 2 x34baseboard and we stubbed out for a future basement zone. By john vastyan t he installation of a parallel primary loop is widely regarded as fundamental to the optimal performance of lowtemperature, multizone hydronic systems.
Vaillant ecotec vu 4664 installation and maintenance instructions manual. View product information and literature for lowloss headers. For one british pound, honeywell sold the first specification to the. Wall mounting bracket for low loss header q100 price.
This web page focuses on software and computer programs related to hydronic systems. For hydraulic separation constant flow rate in the heat source prevention of insufficient flow rate. The common supply temperature sensor located of the low loss header connects to the vitocontrols controller ensuring optimum staging of the boilers and accurate control of system supply water temperatures. We talk about how they can help the efficiency of a heating system, how they are installed into the heating, how they. For product availability in your area, please verify your zip code. You can order online today at great prices and collect in your local branch or have it delivered to where you need it. Think of fitting a buffer not a header it also acts as the header too. The low loss header mustbe used in multiple vitodens 200 installations maximum of 4 boilers. I only sort of understand low loss headers, and certainly not to the extent of sizing one.
Low loss header what it actually does why should i fit a. Chilled water stainless steel low loss headers as part of a r22 chiller replacement programme, the existing chilled water infrastructure was also upgraded in part, including the incorporation of low loss headers. Combi boiler low loss header ufh advice diynot forums. We stock a huge range of flues and flue accessories to match your boiler, budget and installation.
The main purpose of this vaillant wh95 low loss header is to maintain the correct flow of water through the boiler and allow a constant temperature supply of water to reach multiple heating circuits downstream of the low loss header connection. The main purpose of this vaillant wh40 lowloss header is to maintain the correct flow of water through the boiler and allow a constant temperature supply of water to reach multiple heating circuits downstream of the lowloss header connection. Hi there,would like to know why low loss headers are designed with a max velocity of. Low loss header what it actually does why should i fit. The low loss header is available in the following sizes. View and download predefined hydraulic schematics for condensing boiler systems. Heat pumps, circulation pumps, thermostat control, low loss headers and ma. Since this seems to be an existing system and is piped similar to your original sketch, id suggest that a low loss header would be much easier to install as it would require fewer piping changes.
In addition, the lowloss header helps eliminate debris from the heating system. This is critical in microwave, military, wlan, wireless, cellular as well as medical applications. Boiler software and computer programs load design sizing. Gaining traction as an alternative to meticulously constructed parallel primary loops is the lowloss hydronic header, now available in preassembled packages. But one quotation is different in that it offers, as an option, the installation fo a low loss header and sump pump. The main purpose of this vaillant wh40 lowloss header is to maintain the correct flow of water through the boiler and allow a constant temperature supply of. There will be 5 secondary outlets and returns all in 28mm copper. Vaillant lowloss headers are only suitable for new clean systems up to 70kw net input with correctly inhibited water. Buy the vaillant low loss header wh280 306725 from. Low loss header intaflo hydronics is an australian supplier of hydronic heating equipment. Low loss headers, also referred to as common headers, have been used as best practice heating system design for many years now. As part of an ongoing partnership with the fire fighters charity we have just completed the installation of 2 x vaillant ecotec 65kw system boilers using a low loss header and the latest cascade manager to optimise the boilers under part load conditions. The low loss state is classed as a flow rate of less than 0,5 ms and to achieve this the general formula i have used in the past to design for a low loss in the header is.
The charging circuit connection downstream of the low heating circuit connection using low loss header loss header enables the choice of an individual cylinder. Large domestic new system screwfix community forum. This reference page has an index that will guide you directly to boilerrelated computer programs online. Lowloss headers maintain the correct flow of water through the boiler and allow a constant temperature supply of water to reach multiple heating circuits downstream of the lowloss header connection. Sep 14, 2011 hi there,would like to know why low loss headers are designed with a max velocity of. Maximum system flow rate m3h gpm 16080 10 44 200120 18 80. The common supply temperature sensor located of the lowloss header connects to the vitocontrols controller ensuring optimum staging of the boilers and accurate control of system supply water temperatures. Enter the first seven digits of the serial number for diagrams and parts lists. Another benefit of low loss and ultra low loss types of cables are the different physical or mechanical types such as flexible, formable or semirigid. When calculating heat loss for a boiler, it does not matter if the unit is gas or oilfired. The sepcoll, a new device combining a hydraulic separator and distribution manifold, is used in he. We take a look at the role they play and what to consider when installing them. Maximum efficiency with high turndown that precisely matches load. Also, i never install a wall hung boiler without a low loss header, it stops primarysecondary pumps from fighting each other, period.
The cylinder also acts as a buffer too, so double advantage. Im wondering whether a low loss header is required and how to lay out the pumps ie. Greenstar low loss header installation and servicing. The principle behind the design saves separate horizontal boiler headers, no requirement for a separate magnetic microbubble air and dirt separator, the unit has an aav at the top not shown and a flushing valve at the base. View and download vaillant ecotec vu 6564 installation and maintenance instructions manual online. Is there a calculation for this or just a rule of thumb,if a calculation does exist could someone please explain in detail what the figures are what they represent. Lowloss headers are only suitable for new, clean systems, up to 70kw net input with correctly inhibited water. High quality heating and cooling components especially designed to drive and maintain hydronic floor heating installations.
Simplified boiler system layout as manifold and lowloss header provide complete primary loop. Feb 09, 2012 i am feeding two air source heat pumps into a low loss header. In addition, the low loss header helps eliminate debris from the heating system. I was planning to to do most pipework myself to keep costs down, and the plumber doing the boiler install advises a low loss header to separate the two pumps. Low attenuation loss is the primary benefit when choosing a low loss or ultra low loss cable. Since this seems to be an existing system and is piped similar to your original sketch, id suggest that a lowloss header would be much easier to install as it would. The size of the low loss header relates to the output of the boiler and the system load, design and chosen. There will obviously be two inputsreturns for the hps. Service you would expect from a trusted uk company. Lowloss headers maintain the correct flow of water through the boiler and allow a constant temperature supply of water to reach multiple heating circuits downstream of the low loss header connection.
With regards to the sizing of low loss headers the equations below are what i normally use. Gaining traction as an alternative to meticulously constructed parallel primary loops is the low loss hydronic header, now available in preassembled packages. The main purpose of this vaillant wh95 lowloss header is to maintain the correct flow of water through the boiler and allow a constant temperature supply of water to reach multiple heating circuits downstream of the lowloss header connection. Greenstar low loss header installation and servicing instructions if your product was manufactured before 01. I am feeding two air source heat pumps into a low loss header. Mecaflux, the software allows the calculation of the thermal flow, and the size of duct flue but for those who do not have the software. B the low loss header is designed to be used with worcester boilers only. Maintaining the flow what is the role of a low loss header in commercial heating systems. Low loss header wh160 for flow rates of 12000 lhr dn65 pn6 product features. Ive got exactly what james talks about, vaillant ecotec combi with 2. Fire fighters charity marine court 2 x vaillant 65kw gas.
Stainless steel headers were installed in lieu of mild steel with typical sizes of 450mm diameter and 600mm diameter. Low loss headers are only suitable for new, clean systems, up to 70kw net input with correctly inhibited water. Vaillant ecotec vu 6564 installation and maintenance instructions manual. Low voltage terminals 230 mains voltage terminals vrc 693 outdoor sensor vr 10 low loss header sensor hot water secondary circulation pump set ecotec parameter d. View and download vaillant ecotec vu 4664 installation and maintenance instructions manual online. Lambda pro ensures maximum efficiency by automatically adjusting the gas and combustion air ratio. Boiler manufactures should tell you what the specs are for each make and model. Vaillant low loss headers are only suitable for new clean systems up to 70kw net input with correctly inhibited water. It had to run, like the existing controllers, over the existing two wires, not polarity sensitive, without the use of batteries. By john vastyan t he installation of a parallel primary loop is widely regarded as fundamental to the optimal performance of low temperature, multizone hydronic systems. Low loss header wh160 for flow rates of 12000 lhr dn65 pn7 resources. These heating systems may have different temperature and flowrate requirements e.
Low loss header vr 10 sensor supplied with vrc 630 controller. Your boiler, particularly the heat exchanger in you boiler, will only function at its peak efficiency when the water velocity passing through it is maintained within prescribed parameters. To help with commercial heating system design, hamworthy provide hydraulic schematic drawings. Outstanding performance with vitodens 200w and lambda pro combustion management system. Producer reserves the right to modify its products without any advance notice. Opentherm was founded in 1996 because multiple manufacturers needed a simpletouse communicating system between room controller and boiler.
Low loss headers on heating systems explained with special guest drew styles. To achieve hydraulic separation you need a low loss header or traditional primarysecondary piping. Low loss headers maintain the correct flow of water through the boiler and allow a constant temperature supply of water to reach multiple heating circuits downstream of the low loss header connection. The main purpose of this vaillant wh40 low loss header is to maintain the correct flow of water through the boiler and allow a constant temperature supply of water to reach multiple heating circuits downstream of the low loss header connection. Vaillant ecotec 100kw wall hung regular commercial boiler. Low loss headers play a vital role in ensuring that boilers operate at a constant flow rate, so why is there such a lack of design guidance. Select the size based on the maximum system flow rate of your application. Remove lowloss header and supplied accessories from carton see section entitled standard equipment on pages 8 and for a list of component parts included with your lowloss header.
Discussion in plumbers talk started by slide, jun 19, 2014. Item code type max power 04 92 040 she40sm 2565 1 int. Plate heat exchanger, how it works working principle hvac industrial engineering phx heat transfer duration. The explanation is that because my pipework is old, the engineer cannot guarantee input and output temperatures of the boiler and as a result the boiler may not run at its optimum efficiency.