Ventilation Hire And Cleanroom Cooling For Alcatel Submarine Networks



Alcatel Submarine Networks






Temporary HVAC ventilation close control


Total KW

330kw cooling 120kw electric heating

Cleanroom Cooling And Ventilation Hire For Alcatel Submarine Networks In Greenwich.

Ventilation hire and cleanroom cooling for Alcatel Submarine Networks. In one of our most challenging projects, we helped them to maintain their operations whilst a major AHU replacement programme was completed.

Ventilation Hire And Cleanroom Cooling- The Challenge

This ventilation hire and cleanroom cooling project was one of our most challenging projects to date. Albeit, not in terms of scale, but more from a controls point of view.

Whilst the clients HVAC plant was undergoing a replacement programme, full operation of the clean rooms effected was required. Three air handling systems, serving three clean rooms were due to be replaced.

With tight temperature and humidity bands of plus/minus 2 degrees and 20% RH, this project required very careful consideration and realisation. Even then, much follow-up commissioning was required to achieve what would turn out to be a great result.

The completed installation
The completed installation. In the foreground are the water chillers and further back the AHU's which are ducted to the work areas. Three Zones (cleanrooms) in total were controlled.

Lots of ducting. Three areas the fitted with flexible supply and return air ducting. The heavier gage suction ducting is in grey.

The Solution To Ventilation Hire And Cleanroom Cooling

With the aforementioned in mind a detailed site survey was made and a proposal for ventilation hire and cleanroom cooling put forward.

This proposal included, 3x ACR 160.120 AHU’s, 3x CH150 packaged water chillers and all associated equipment, including all air ducting and chilled water hosing.

For this project we used 500mm flexible Spiroflex ducting to connect between the temporary AHU’s and the customers ducting spigots. Catenary cable was used for support. Overall this was an ideal system that could be tailored to the changing conditions in the plant room.

Ventilation Hire and Cleanroom Cooling for Alcatel Submarine Networks
Lifting the units into position was a very delicate operation. Because of the confined space the the hiab lorry needed to re-position several times to bring the units into position. Proper lifting frames really help in these situations

Installation Of The Cleanroom Cooling System

All the external equipment was positioned using a hiab lorry. Due to limited space multiple lifts were required involving re-positioning of the lorry. A big thanks as always to the guys at David Stanley Transport for their unswerving support.

Once Positioned, the AHU’s were fitted with 500mm supply and suction ductwork. The chillers were connected with 2″ rubber suction/ discharge pipe-work, with each AHU being served by one packaged chiller. The chillers used here have a capacity of 110kw cooling, and incorporating tanks and pumps, are neat and easy to install.

The 500mm ductwork systems were installed/ supported in the plant room using a catenary wire system. The final connection was made to the clients plant during short change over periods, when the fixed plant was shut down and the temporary connected and started.


Requiring some serious lateral thinking and revisits to the design, commissioning was very involved.

Initially, temperature control was facilitated by the AHU’s on-board controllers using sensors placed in the rooms. However, as a result of the clients monitoring systems, including multiple averaging sensors, there was a disconnect between the systems ie. our control temperature sensor was not reading the same as their averaged, consequently taking the room out of specification and stopping work. As a result, a full controls review was undertaken and a course of action decided upon.

Outputs from the clients existing controls systems were used to drive additionally control valves for the chilled water supply. As such, temperature monitoring and control was centralised in one place ensuring accurate space temperatures within spec.

The additional 3 port valves retrofitted to the AHU’s with direct control from the clients BMS system. Close control of the space temperature was achieved in this way.

ventilation hire
Here we can see the temporary connections with the existing air handling plant removed ready to be cleared for the new plant. All in all this was a very involved project that need close collaboration with the project team


After some initial controls issues the space temperature control achieved with the temporary AHU’s was exceptional. Re-evaluating the control strategy, coupled with modifiable systems, was significant to achieving this.

All things considered, disruption to the clients operations was minimal, with normal operation maintained. The ventilation hire and cleanroom cooling remained in place for a total of 6 months whilst the clients AHU’s were replaced.

Please contact us here if you require any advice or assistance with your project.

A video Walk around of this Ventilation Hire and Cleanroom Cooling Project

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Products Used In This Case Study

150kw Chiller Unit Hire (Packaged)


150kw Chiller Unit Hire (Packaged)

Our 150KW commercial and industrial chillers are available for immediate hire.

160kw HVAC AHU Hire


160kw HVAC AHU Hire

The ACR 160kw HVAC AHU hire unit is a portable air handling unit that can provide automated heating and cooling ventilation for large spaces.

80kw HVAC AHU Rental


80kw HVAC AHU Rental

80kw HVAC AHU rental for all space cooling and heating applications.

Air Sock and Ductwork Hire


Air Sock and Ductwork Hire

ACR maintains large stocks of air sock distribution systems for immediate hire. These can be supplied with air handling units for all large and small space climate control applications.

Chilled Water Hose Hire


Chilled Water Hose Hire

Temporary chilled water hose and ancillaries rental from Advanced Climate Rentals.

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