The DATA is a twin plate heat interface unit providing instantaneous hot water and indirect central heating through plate heat exchangers, with electronic stepper-motor valve control. It was one of six HIUs independently tested when the UK HIU test standard was introduced, and recorded the best efficiency of any unit tested, a result that stood for years afterwards. Over 20,000 units with the same control platform are in the field.
Heatweb no longer manufactures the DATA. We continue to service, repair and recondition units, hold the settings and drawings for every variant, and support installers, operators and residents who have one.
What it does
- Hot water up to 65 kW on the standard model and 80 kW on the DATA Plus, with the temperature adjustable between 45 and 60 °C.
- Central heating up to 25 kW at 30 °C ΔT, with the flow temperature adjustable between 50 and 80 °C to suit radiators or underfloor heating.
- Primary return temperature limitation, set at commissioning, so the unit keeps the network's return temperatures where the operator needs them.
- Heat-up boost brings the unit to temperature at full power before ramping down to a steady output.
- Economy mode lets the unit go cold after an hour of inactivity instead of using metered energy to stay warm; a trickle flow can be set where heat must be maintained.
- Sterilisation programme raises the hot water temperature periodically to prevent Legionella.
- Self-protection. Sensors for temperature, pressure and flow let the unit monitor its own performance and detect faults, and it protects itself against unbalanced radiators. Units were supplied pre-set to the consultant's requirements, so no site commissioning was needed; only approved engineers can adjust settings.
Construction and options
The unit sits in an insulated, removable EPP casing with a standing heat loss under 50 W, small enough for a standard kitchen cupboard with no side clearance needed for servicing. District network connections are top entry and apartment connections bottom entry, with a pre-install plumbing jig and isolation valves so the pipework can be completed before the HIU arrives. An 8-litre expansion vessel, safety relief valve, temperature and pressure gauge, drain point, primary and secondary strainers and a 7.5 m pump are fitted as standard.
Options fitted to units in the field include a decorative white steel casing wrap, tamperproof case and heat meter fixings, a choice of heat meter models, a landlord security valve or relay kit, a hot water recirculation pump, a water hammer arrestor, a differential pressure control valve for networks above 2.5 bar ΔP, a Modbus communication module, and underfloor heating overheat cut-out terminals.
Connected units
The DATA can connect to billing and BMS systems for remote commissioning, monitoring, control adjustment and fault reporting, from a PC, tablet or phone. Where a development was fitted with inter-networked units, site-wide adjustments can match loads to the heat available on the primary circuit. Commissioning software was provided to third-party commissioning engineers; contact us if you need it for a unit you are working on.
Support
- Servicing and breakdowns. Annual servicing and emergency visits for individual units or whole developments. Book a visit.
- Reconditioning. Units returned to us are overhauled, retested and re-certified.
- Fault finding. The troubleshooting guides in the sidebar cover the common faults for residents and for technicians. For anything else, our engineers know this unit better than anyone.
- Spares. Controllers, valves, sensors, pumps and plate heat exchangers are available through the Heatweb store.