Project Illumina Granta Park

Illumina is a leading developer, manufacturer, and marketer of life science tools and integrated systems for large-scale analysis of genetic variation and function.

There customers include a broad range of academic, government, pharmaceutical, biotechnology, and other leading institutions around the globe.

Project Value to ECE

Illumina Centre £541,071 (Completed within an 8 week manufacturing slot)

System and Controls Description

To provide the controls required to achieve fully commissioned and operational packaged air handling unit Systems comprising free cooling, high efficiency energy recovery, frost LTHW heater, LTHW re-heater, CHW Cooling coil and variable speed static pressure control.

The packaged AHU control system uses the Trend IQ4xcite line of controllers thus fully compatible with the main BMS system. The AHU controller is viewable via the interface mounted on the front of the unit and via the existing site Trend 963 supervisor PC where graphics is installed for the two new AHU’s.

The five supply air plants AHU01, AHU02, AHU03, AHU04 and AHU05 and the five-number associated general extract fans GEF01, GEF02, GEF03, GEF04 and GEF05 operate in conjunction to the serve the ventilation and comfort conditioning requirements of the laboratory and office areas.

During period of peak cooling demand, the BMS system will automatically sequence all five air handling units and associated extract fans to operate. The system is designed to accommodate isolation of one air handling unit and associated extract fan during periods of routine maintenance, which should ideally be timed to coincide with periods of reduced cooling demand.

Generally, the design intent requires all five air handling units and their associated extract fans to operate at reduced capacity under normal operating conditions. However, an extract fan maybe disabled through the BMS to maintain minimum extract discharge stack velocity.

Ref. Adjustable set point Indicative Setting 1 General extract static pressure set point 370 Pa. Five static pressure sensors are installed within the extract ventilation ductwork to ensure reliable and stable control. The BMS system controls the extract fan speed to the highest pressure reading of the three sensors.

This system is designed to be N+1. In the event that any of the AHU system fans are deemed to have failed, the operating speed of the remaining healthy fans will be increased to maintain the required system duty. Differential pressure switches and inverter drive status monitoring are used to detect failure of air handling unit supply fans and associated extract fans.

Once demanded, Temperature control of the unit is based on a constant supply air temperature to provide tempered fresh air to multiple areas. The air provided by the AHU will be tempered using the energy recovery unit to provide primary air using the reclaimed energy from either the return air or free cooling from outside air. The unit will then use, if required, the heating or cooling provided by their LTHW heating or CHW cooling coils to top up the primary air to meet the supply air temperature demands.

Fan Speed will be controlled by the duct mounted air static pressure transducers fitted in both the supply and extract duct at least 10 meters from of the unit.  The actual pressures were set during the air balancing commissioning stage by the air balancers to meet the required duct pressure and set via the main BMS system.

AHU Supply
AHU Extract

AHU Supply

AHU3 schematic


Air Handling Unit Specification

The packaged air handling units incorporated all the components necessary to provide an efficient and effective source of air distribution, i.e. fans, filters, coils, heat recovery etc.

The AHUs were sized to take into account all key factors including specific fan power, air volume, heating/cooling requirements, humidity control (where applicable), space availability and noise levels.

Units were selected to provide the required duty at optimum performance and efficiency and included clean and dirty filter automatic sensing and fan speed adjustment.

The AHU conformed to the following criteria as stated in BS EN 1886:2007:-

  • Thermal bridging – Class T2
  • Thermal bridging factor – Class TB2
  • Casing strength – Class D1

Primary and secondary air filtration conformed to BS EN 779: 2012 for filter performance

All filters are Eurovent certified and tested to BS EN 1886: 2007 for air leakage and performance.

BS EN 1822 for High Efficiency Air Filters (HEPA)

BS EN ISO 14644 Cleanrooms and Associated Controlled Environments

Where high efficiency filters were incorporated in to the AHU, all filter cells were within purpose made frames. This ensured that the complete assembly conformed to BS 3928 and DIN 1946. Every filter case had to demonstrate a sound individual construction to perfect each seal.

At practical completion of the every HEPA filter installation was tested in accordance with BS EN ISO 14644, BS 5726 and BS EN 12469.

DOP Test Report


Client Portal and Asset Information

All plant and equipment were allocated an asset code, generated by ECE UK Limited.

You can enter that asset code on our websites client portal:

The web based portal holds the following information:

  • Air Handling Unit 2D DWG
  • Air Handling Unit 3D IFC
  • Air Handling Unit IOM
  • Air Handling Unit Recycling Manual
  • Air Handling Unit Controls Philosophy
  • Controls Wiring Diagram
  • Control Points List
  • Commissioning Report
  • Full list of parts and spares which are available from 


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