View source for The DATA HIU


[[File:the_DATA.png|300px|link=http://heatweb.co.uk/w/images/f/f8/The_DATA.png|right]]
[[File:Approved_Product_Logo.png|link=http://heatweb.co.uk/w/images/b/b8/Approved_Product_Logo.png|300px|right]]

The article forms the basis of the literature on the DATA and DATA PLUS HIU's.

==Introduction==
{{IMGS|comparisonVWART_besa1.png|Official VWART Comparison from Independent Testing|350}}
{{IMGS|comparisonVWART.png|Official VWART Comparison from Independent Testing|350}}

The DATA is our standard twin plate Heat Interface Unit.

Originally one of six HIU's tested independently to the new UK HIU standards, and still demonstrates beyond doubt to offer greater efficiencies than any other HIU since tested.

'''[https://www.thebesa.com/ukhiu Click here to learn more about the new UK standards.]'''

It is built using tried and tested electronic controls with over 20,000 in the field.

The system is immune to installation error (within reason) and required no site commissioning, with units are supplied pre-set to consultants requirements. Only approved engineers can adjust settings, and the system will protect itself against unbalanced radiators.  Commissioning software is provided to third party commissioning engineers. 

It has the ability to connect through billing and BMS systems to provide functions such as remote commissioning and fault reporting, ensuring heat networks can be maintained at peak efficiency throughout their life.

We are a UK manufacturer, with 25 years experience building HIUs, some of the most advanced training facilities in the UK, as well as nationwide servicing capabilities. We take pride in our products and service levels, and have never left a customer with a complaint - be they a local authority, or a private individual.

==BESA Results==
[[File:NUMBER-ONE.jpg|150px|right]]

Our latest results are as follows:

* [https://www.thebesa.com/media/2559/7p03972-thermal-integration-uk-hiu.pdf Test Report]

* [https://www.thebesa.com/media/2560/170822_vwart_model_thermal_integration_july-2017-high-temp_results-sheet.pdf High Temp Results]

* [https://www.thebesa.com/media/2561/170822_vwart_model_thermal_integration_july-2017-low-temp_results-sheet.pdf Low Temp Results]

Test results for all approved HIUs can be found at:

* https://www.thebesa.com/ukhiu

==Documents==

===Installation Instructions===

{{PDFsum|Installation Instructions for the Data HIU|Cover_data.jpg|Comprehensive installation manual for the twin plate DATA HIU.|http://www.heatweb.co.uk/w/images/5/55/TIL_PDF_Binders_Installation_Instructions_D3.pdf}}

===User Instructions===

{{PDFsum|User Instructions for the Data HIU|Cover_data.jpg|User manual for the twin plate DATA HIU.|https://www.heatweb.co.uk/w/images/d/dc/DATA_User_Instructions.pdf}}

===Datasheet===

To be updated - See information below.

<!-- {{PDFsum|DATA Datasheet|DATA_Datasheet_pg1.png||http://www.heatweb.co.uk/w/images/1/1d/DATA_Datasheet.pdf}} -->

===Approvals===

{{PDFsum|WRAS Approval Certificate|Approved_Product_Logo.png||http://www.heatweb.co.uk/w/images/7/77/DATA_WRAS_certificate_24893.pdf}}

[http://www.heatweb.co.uk/w/index.php?title=The_DATA_Mitigating_Risk#The_DATA_WRAS_approval Click Here] to find out more about The DATA WRAS Approval

===Troubleshooting===

{{PDFsum|Troubleshooting for End Users|Troubleshooting for End Users.jpg|Comprehensive End User troubleshooting guide.|https://www.heatweb.co.uk/w/images/5/52/Table_DATA_End_User_Troubleshooting_-_Heatweb_Wiki.pdf}}

{{PDFsum|Troubleshooting for Technicians|Troubleshooting for Technicians 1.jpg|Comprehensive troubleshooting guide.|https://www.heatweb.co.uk/w/images/d/df/Troubleshooting_for_Technicians.pdf}}

{{PDFsum|Wiring Harness Pin Designations|DATA Pin Designations.jpg|Comprehensive diagram showing all pin positions for the wiring harness.|https://www.heatweb.co.uk/w/images/8/8f/DATA_Controller_Pin_Designations.pdf}}

==Software==

'''<big><big>[[HIU_Monitor_Application_Software | Click here to go to the HIU Monitor Application Software page]]</big></big>'''

==3D Model==


'''<big><big>[[BIM Files | Please click  here to go to the BIM / CAD File downloads page.]]</big></big>'''

== 3D Model ==

<html><iframe src="https://thermalintegration.autodesk360.com/shares/public/SH56a43QTfd62c1cd9681691036325a5cfa2?mode=embed" width="800" height="600" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true"  frameborder="0"></iframe>

</p>

</html>

==Previous Versions of Literature==

[[:File:DATA Brochure 020715.pdf]]

==HIUs from Thermal Integration==
{{:HIUs from Thermal Integration}}

==Description==

<gallery widths=400px heights=400px>
Cutaway 3.png|link=http://heatweb.co.uk/w/images/8/88/Cutaway_3.png|
Case21.png|link=http://heatweb.co.uk/w/images/6/64/Case21.png|
</gallery>

The DATA is our flagship twin plate HIU, it has WRAS approval and has been tested to the latest '''[[HIU Testing Standards v2|BESA]]''' Standard. The DATA represents the new standard in twin plate HIU's, combining all the latest technologies into a solid, compact unit that outperforms anything in its class.

===Features & Benefits===

*Compact design with no need for clearance either side for servicing. Allowance made for extra options, yet small enough to fit into a standard kitchen cupboard
*Instantaneous hot water up to 65kW (Standard Model) 75kW (PLUS Model) - at 37 & 48kPa (respectively) Primary Differential Pressure. Temperature adjustable from 45-60°C
*Indirect central heating up to 25kW (@ 30° Delta T) Temperature adjustable from 50-80°C (To suit radiators or underfloor heating applications)
*Primary return temperature limitation, settable at commissioning
*Heat-up boost, enabling the DATA to get up to temperature with maximum power before ramping down to maintain a steady output
*Option for Inter-networking of all DATA units within a development to enable site wide adjustments to match loads to primary circuit heat availability
*Option for browser based interface and online dashboard for remote commissioning, monitoring, control adjustments, performance visualisation, fault detection and diagnosis using pc, tablet or phone 
*Sensors for temperature, pressure and flow rate allow the system to monitor performance and detect fault conditions locally, or on the district heat network
*The latest stepper motor valve technology allows the system to react rapidly, thereby maintaining accurate control over domestic hot water temperatures
*Pre-install plumbing jig complete with isolation valves to allow pipework on site to be completed prior to HIU installation
*Primary circuit trickle flow can be set during commissioning to maintain heat within the unit. When in Economy Mode it allows the unit to go cold following one hour of inactivity, preventing unnecessary use of metered energy
*Insulated removable EPP casing with less than 50 Watts standing heat loss; ensures the unit can be maintained at temperature with little impact of metered energy use
*Sterilisation programme raises the Domestic Hot Water temperature periodically; preventing the development of Legionella bacteria
*Casing and Heat Meter anti-taper fixings
*Option for Built-in security valve feature for landlord isolation
*Pump exercise function
*Option for integral hammer arrestor
*Option for integral Domestic Hot Water re-circulation pump
*Site specific factory calibration of controls to predefined settings
*Customised connections top/bottom (standard connections:-TOP - Primary flow & return and Mains Cold Water / BOTTOM - Central heating flow & return and Domestic Hot Water)
*'''WRAS approved''' {{F|DATA WRAS certificate_24893.pdf| DATA WRAS Certificate}}

{{:Table:_DATA}}

==The DATA and DATA PLUS Specification Text==
{{:The_DATA_Specification_Text}}

==Schematic==

[[File:TIL_Data_Schematic21.jpg|600px|link=http://heatweb.co.uk/w/images/f/f5/TIL_Data_Schematic21.jpg]]

==As Standard==

===Electronic Control===

Rather than purely mechanical controls, the DATA uses an electronic controller to read sensors and control outputs such as valves and pumps. The big advantage of this approach is it enables every control function desired to be implemented through lines of software code, where a mechanical system requires a separate device to perform each function. This is best demonstrated by the list of functions the DATA can perform using just one valve for each heat exchanger, including temperature control, differential pressure compensation, domestic hot water preheat, heat boost, and security shut-off. A mechanical system to achieve this requires a multitude of valves, and becomes complicated, large, and heavy. The DATA's electronics also enable such functions as smartphone control, network load management, and remote commissioning and fault reporting, by exposing data and receiving commands via a serial port to the optional IHIU Ethernet/WiFi control system.

===Stepper Motor Technology===

The DATA makes use of the latest stepper motor technology for both the hot water and central heating control valves. This provides a number of advantages over more traditional thermostatic or motorised valves, allowing significantly faster and more accurate control of flow rate and temperature. More significantly the DATA can operate the valves to perform a range of functions, rather than simple fixed temperature control. These include return temperature limitation, flow limitation, and sterilisation cycles.

{{:Economy / Comfort Mode}}

{{:Anti Legionella Function}}

{{:Moulded_EPP_Insulated_Casing}}

===Advanced Heat Exchanger Technology===
District heating pipework should generally be sized for temperatures as high as the plant can typically generate, to satisfy those days when it is -5°C outside.  Most of the time however, there is considerable space to run the network at lower temperatures during periods of reduced demand. In addition, modern heating loads are becoming very small indeed, making it difficult to maintain turbulence (and efficiency) within heat exchangers. The DATA makes use of Asymetric plate heat exchangers to best match the characteristics of modern dwellings, while maintaining efficiency.

===Pump Exercise Function===
During prolonged periods when the heating is not in use, it is important to ensure the heating pump does not seize up.  This is often a problem with Mechanical HIU's and can require costly service visits or replacement of the pump. Therefore the DATA is programmed to perform an automatic pump ‘exercise’ function which takes place every 24 hours and lasts for 60 seconds.  The function will take place regardless of whether the room thermostat or programmer are calling for heating.  This ensures there are no nasty surprises when the heating season begins.

===Metering & Security===
The DATA has been designed with pre-pay billing systems taken into consideration, where HIUs need to be fitted with a security shut-off valve, and designed with tampering in mind. The DATA includes pipework allowance for both a heat meter and security valve internally. To simplify the process of securing bolts and access points on HIUs, we make use of unique moulded security clips and caps that once assembled, makes it impossible to access a bolt head or connection nut without breaking the cap. To secure casings, and any bolted on components that one would like secured, we use a Bolt Security Cap. Bolts are inserted through the lower part of the security cap assembly, and screwed into position. The upper part is then pushed into the lower part until it locks, at which point the cap cannot be removed, and the screw head cannot be accessed.

===Reliability and Confidence===

Ask yourself, is it possible for installers or users to modify any settings in an HIU that could affect performance? 
Then ask yourself, of all the problems you have ever had with HIUs, were any related to inconsistent settings or tinkering?

The performance settings on the DATA can only be altered by an approved engineer with the right kit and software, and is typically setup both in the factory, and again confirmed at commissioning. These settings are locked in software, with a report confirming all settings generated at commissioning. Following setup, no-one can change the settings, override DHW settings, open bypasses, or set the central heating temperatures too high. The whole system actually performs in reality as it does on paper.

==Options==
===Heat Meter===
A selection of heat meters are available to be factory fitted. Heat meters can be protected with a patented security clip to provide a permanent security fixing that prevents access to connections without breaking the tamperproof seal. The heat meter display is mounted on a metal panel recessed into the front of the unit, providing access to buttons, but preventing removal.

<Gallery widths="300px" heights="300px">
File:hmb1.png|Heat Meter Mounted|link=http://heatweb.co.uk/w/images/2/21/Hmb1.png
File:Heat_Meter_Security.png|Tamperproof Nut Covers|link=http://heatweb.co.uk/w/images/0/0c/Heat_Meter_Security.png
File:Security_Screws.png|Tamperproff Screws|link=http://heatweb.co.uk/w/images/b/b5/Security_Screws.png
</Gallery>

===Landlord Security Isolation===

Where HIUs are intended to be used in conjunction with pre-pay systems where it is required for utility providers to have the facility to shutdown heat supply, the DATA can be factory fitted with landlord activated security isolation that closes the primary feed to the unit if the end user defaults on their energy payments.

As an alternative it is possible to fit the DATA with electronic isolation control, which communicates directly with the HIU controller to shutdown the unit with immediate effect, or gradually over a period of time, so that the end user does not get a nasty surprise mid shower.

===Flushing Bypass===

The DATA HIU can be fitted with a flushing bypass to allow flushing and cleaning of the primary circuit without contaminating the plate heat exchangers within the HIU.

We have sourced a flushing bypass that does not allow the installer / commissioning engineer or end user to leave the bypass open whilst the HIU is in use.  This means that the performance of the district heating network cannot be inadvertently compromised by a flushing bypass being left open for a prolonged period of time, without the resident complaining about lack of heat or hot water.

Our flushing bypass is also fitted with binder points as standard, to allow differential pressure measurement across the primary flow and return connections.  This can aid fault finding on the district heating system.

<Gallery widths="450px" heights="450px">
File:Flushing Bypass_01.jpg|Flushing bypass dimensions
File:Flushing Bypass_02.jpg|Flushing bypass function|link=http://heatweb.co.uk/w/images/a/a7/Flushing_Bypass_02.jpg
</Gallery>

{{PDFsum|Flushing Bypass Instruction Sheet|Miniflush.JPG||https://www.heatweb.co.uk/w/images/9/9f/70Flushing-Bypass-03_-_DATA_Flushing_Bypass.pdf}}

===Pre-plumbing Jig & Isolation valves===

There are a number of different configurations available for the DATA HIU, with or without brackets, with or without flushing bypass, as shown below.

[[File:DATA Plumbing Options.jpg|1000px]]


{{PDFsum|DATA Plumbing Options sheet|DATA Plumbing Options with title.jpg||https://www.heatweb.co.uk/w/images/0/07/DATA_Plumbing_Options_sheet.pdf}}

===Matched Heat Exchangers===

It is not the case that bigger is always better, and oversizing a heat exchanger can cause as many problems as undersizing.

The reason is that efficient heat exchange requires turbulence within the water flow, however below a point the flow becomes laminar, and the hotter water tends to pass right through the heat exchanger resulting in elevated return temperatures that can destroy the efficiency of a district heating network.

To ensure optimum efficiency we can supply heat exchangers designed to match your heat loads to perfection. Typically we will issue heat exchanger calculations at the customers proposed operating parameters.

===Network Control and User Interfaces===
{{IMGS|datass1.png|Home screen provides operating data, and user controls}}
{{IMGS|datadash.jpg|Site Dashboards}}
As an optional extra, the Data can be supplied with an IHIU controller, providing the system with web server capabilities, and a host of options.

* System will generate a local WiFi hotspot that can be used to access the Data controls.
* The system can be logged onto an existing WiFi network to connect it to the internet and other devices.
* Alternatively, a wired Ethernet connection is provided.
* Provides end users with pc, smartphone or tablet interface, either locally or remotely.
* Enables remote commissioning and fault response.
* Connects system to Google calendar services for control over hot water and central heating.
* Enables sensor and performance data to be logged to remote web servers for analysis, at up to one second resolution.
* Enables data logging to the Energy Saving Trust's EMBED database
* USB port enables connection to other devices via serial, RS232/485, mesh networking, [[ModBus_RTU_Master|Modbus]], and more.

===Secondary Return Pump===
{{:DHW_Recirculation_Pump_Option}}

===Water Hammer Arrester===

Water hammer can occur in the HIU and connected pipes when water is accelerated or decelerated very quickly.  This can be caused by certain types of valve or tap connected to the DHW system, but can also occur when the Secondary DHW recirculation pump stops.

The phenomenon can, in extreme circumstances, result in noise and damage to the whole system, and the Water Hammer Arrester prevents such damage.

Depending on other options we can fit two different models, the flow through or single inlet option.  Both are WRAS approved and function in the same way. 

[http://www.heatweb.co.uk/w/images/8/86/Caleffi_Water_Hammer_Arrestor_Tech.pdf Caleffi Water Hammer Arrestor]

===Differential Pressure Control Valve===

A Differential Pressure Control Valve (DPCV) is only required where differential pressures across the primary flow and return are likely to exceed 2.5 bar.

{{:HIU_Differential_Pressure_Self-Learning_Function}}

===Metal Casing Wrap===

==Return Temperature Performance==

{{:Return Temperature Performance of Electronic HIUs}}

==DHW Performance - '''<big>DATA</big>'''==
===DHW Performance Table===
<html>
<img src="http://www.heatweb.co.uk/w/images/7/79/E8LASx40_DHW_Performance_Chart.jpg" width="50%">
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===DHW Power Chart for 10-55°C===

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<img src="http://www.heatweb.co.uk/w/images/2/29/Domestic_Hot_Water_Power_Output_10-55.jpg" width="60%">
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===Primary Return Temperatures for 10-55°C===

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<img src="http://www.heatweb.co.uk/w/images/9/94/District_Heating_Return_Temperature_10-55.jpg" width="60%">
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===Primary Flow Rates for 10-55°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/c/c2/District_Heating_Flow_Rate_10-55.jpg" width="60%">
</html>

===Primary Pressure Drop for 10-55°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/9/9d/Pressure_Loss_%28Primary%29_10-55.jpg" width="60%">
</html>

===Domestic Hot Water Pressure Drop for 10-55°C===

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<img src="http://www.heatweb.co.uk/w/images/e/e0/Domestic_Hot_Water_Pressure_loss_10-55.jpg" width="60%">
</html>

==DHW Performance - '''<big>DATA PLUS</big>'''==

===DHW Performance Table===
<html>
<img src="http://www.heatweb.co.uk/w/images/7/76/E8LASx54_DHW_Performance_Chart.jpg" width="60%">
</html>

===DHW Power Chart for 10-55°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/1/1f/E8LASx54_Domestic_Hot_Water_Power_Output_10-55.jpg" width="60%">
</html>

===Primary Return Temperatures for 10-55°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/2/2d/E8LASx54_District_Heating_Return_Temperature_10-55.jpg" width="60%">
</html>

===Primary Flow Rates for 10-55°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/c/c1/E8LASx54_District_Heating_Flow_Rate_10-55.jpg" width="60%">
</html>

===Primary Pressure Drop for 10-55°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/e/ee/E8LASx54_Pressure_Loss_%28Primary%29_10-55.jpg" width="60%">
</html>

===Domestic Hot Water Pressure Drop for 10-55°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/d/d1/E8LASx54_Domestic_Hot_Water_Pressure_loss_10-55.jpg" width="60%">
</html>

==Central Heating Temperature Curves==

===Central Heating Temperature Curves for 80-50°C===

<html>
<img src="http://www.heatweb.co.uk/w/images/0/0b/STD_DATA_SPLIT_Heating_Temperature_Curves_-_E8LAS_x_40_%28rev_1%29.jpg" width="80%">
</html>

===Central Heating Temperature Curves for 70-40°C===

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<img src="http://www.heatweb.co.uk/w/images/b/b2/STD_Heating_Temperature_Curves_-_E8LAS_x_40_-_70-40_systems_%28rev._05%29.jpg" width="80%">
</html>

===Central Heating Temperature Curves for 60-40°C===

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<img src="http://www.heatweb.co.uk/w/images/c/c9/STD_Heating_Temperature_Curves_-_E8LAS_x_40_-_60-40_systems_%28rev._05%29.jpg" width="80%">
</html>

===Central Heating Temperature Curves for UFH 45-35°C===

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<img src="http://www.heatweb.co.uk/w/images/0/0c/STD_Heating_Temperature_Curves_-_E8LAS_x_40_-_UFH_systems_%28rev._05%29.jpg" width="80%">
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==Images==

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insulation.png | 
hx2.png | 
Hmb1.png | 
</gallery>


<gallery>
bolt2.png
bolt1.png
datab1.JPG
datab2.JPG
</gallery>



==Components==

[[Image:DATA_Components.png|400px]]
[[Image:DATA_Components_Key.png|500px]]

==District Heating Networks==

===Types of Network===

District heating, otherwise known as communal heating, makes use of centralised boiler plants to generate heat for distribution to properties for the provision of hot water and central heating. Heated water is pumped from the plant along a distribution (flow) pipe, branching off to feed properties along the way. Once the heat has been extracted from the water, it returns along a return pipe, laid alongside the flow.

Central Heating is provided within properties by either passing the flow of heated water from the plant directly to radiators (or underfloor heating), or by using a plate heat exchanger to transfer heat from the plant supply to the properties internal central heating system, keeping them separated form each other. The former method is more common on the Continent, and allows for more efficient and simpler systems. The second, indirect method, is more common in the UK as if provides a demarcation between plant supplies and landlords own systems, protects the main network from leaks within properties, and does not potentially expose end users to very high pressure boiler water (such as when bleeding a radiator on the ground floor of a high rise).

Domestic hot water is typically generated within properties, by using the heated plant supply to in turn heat domestic water, using either a hot water storage cylinder, or by generating the hot water to demand using a plate heat exchanger.  In some networks however, the domestic hot water is generated at the plant also, and piped to properties. To keep the domestic water from going cold in the supply pipe and causing both delays to taps, and risks of Legionella growth, it is usually re-circulated, with some returning back to the plant along domestic return pipes, maintaining flow, and hence temperature throughout the network. 

The big advantage of district heating is it allows the implementation of large scale heat generation, reclamation, and renewables, without the need for any heat generation in properties. The end result should be cheaper, more efficient, and far easier to maintain than generating heat within each property. If designed and implemented properly that is.

===Calculating Diversity===

Diversity, or coincidence factor, is a description of the probability of taps running at the same time, and as such is used to size the peak demand on a system.  There are a number of standards describing the diversity that should be used for various numbers of properties, and more recently there is an increase in the number on monitored systems contributing data to a public data set upon which to base diversities.

Diversity decreases as the number of properties increases. With only a couple of properties there is a high likelihood that most taps,will be run at the same time at some point, so a diversity near 100% would be used.  By the time you get to ten properties, the diversity drops to around 30%, as the probability is lower. Its a bit synonymous to working out how many heads you may throw in a row when tossing a coin.  Its quite likely to get two or three in a row, but ten is far less likely. Data from sites can show diversities over larger sites in the region of 3%. It is important to look, however, at the type of occupancy. If the properties are attached to conferencing facilities where there is a good chance all the occupants will be setting their alarm clocks at the same time, diversity may be significantly higher. 

The approach of designing with a diversity higher than reality, to be safe, leads to oversized pipework and plant, increases heat losses, and increases running costs. It has more of a negative impact on user satisfaction than if the system was sized more to the limits, and ran more efficiently.

If diversity is worked out lower than it really is, then at times of peak demand, there is more chance of those extra few outlets running that take the system beyond its capabilities, and outputs will under-perform.

===Requirements on Water Quality===

{{:Requirements_on_water_quality}}

==Guarantees and After Sales Backup for HIU's==

{{:Guarantees and After Sales Backup for HIUs}}

==Other Products in our range==
{{:Product_Datasheets}}