The existing air handling units were manufactured in 2001 and required extensive upgrades to meet the new specification for the areas served and extend the life cycle of the units. There was a requirement to retrofit heat recovery to the AHUs to improve energy efficiency, upgrade the belt driven fans to direct drive AC plug fans to achieve the new design air volume, and also replace the chilled water cooling coils to meet the required cooling duties.
Mansfield Pollard relocated several AHU components within the unit to allow space for the new heat recovery run around coils. The new coils were supplied and installed in split sections to overcome the on-site access restrictions. Not only did the newly installed AC plug fans create additional space within the unit for the relocated components, but they can also achieve a larger design air volume to meet the specification.
The new AC plug fans are able to deliver a larger volume of air to meet the new specification
The new run around coils provides heat recovery at 68% efficiency
AC plug fans are direct driven which means no belts and pulleys and eliminates multiple points of failure
Increased life cycle
The AHUs are now able to continue operation with an extended life expectancy for the end client