The original unit was put in some 25 years ago on the roof of a 7-storey building.
Over time additional buildings were erected around it which meant that it was impossible to crane a new unit onto the roof and air lifting a new unit was out of the question.
It was impossible to re-position the unit elsewhere, so a re-build was the only option.
The unit was 7.2 Meters long but the only way to get the unit to the roof was in a 2.5M deep lift so how to overcome this?
In the end we designed multiple coil blocks to fit within the lift which were then assembled and brazed together. There were almost 5000 brazed joints on the unit which were done when the coils were in position.
Once fully brazed and tested the casework was replaced and new panels added where required. The headers were re-connected and the unit ran as when it was new.
The complete project took around 5 Weeks on site.
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