Project: Bermondsey CCU Replacements Location Bermondsey Underground Station Client Transport for London Date Nov. 2019 - July 2020 Download full PDF case study

Introduction
London Underground identified a number of
Jubilee Line stations in which the existing Edenaire
HVAC units were beyond economical repair. We
were awarded the contract to replace these units
with new Airedale models, improving the reliability
and sustainability of the station’s critical assets

Project Deliverables
Our mechanical engineering team at Bermondsey
replaced HVAC units across nine critical equipment
rooms within the station. Working within these
rooms required our engineers to hold London
Underground’s QAF (Equipment Room Awareness)
certification.
The team initially obtained water samples for
analysis, which determined the flushing and filtration
requirements. They then stripped-out and retained
the existing Edenaire unit components (e.g. fan decks
and compressors) to service other HVAC systems
across the LU network. 13 of these units were then
replaced with the new Airedale models, along with
associated electrical works, isolators, valves, trunking,
drains and pumps.
The two units within the redundant ticket office were no
longer required. These were removed by our engineers,
and pipework was safely disconnected from the circuit to
avoid future maintenance issues
Challenges and Solutions
The first technical challenge faced by our engineers
was the installation of HVAC units with a new design and
specification. This required ongoing collaboration with
the manufacturer Airedale. We secured a visit to the
Airedale factory in Yorkshire, gaining valuable insights
which influenced our logistical approach and installation
methodology.
Another challenge lay in safely navigating the large and
heavy plant through the confines of the sub-station, which
lies 14m below ground level. We partnered with our
strategic logistics partner Radius, which provided a range
of innovative plant-handling equipment including Long
Sack Barrows and Escalator Sledges. The Escalator Sledge
(see diagram 1, right) enables a load of up to 450kg to be
secured to a flat platform, and moved safely down an
escalator with the weight evenly distributed across five
step levels.

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