HVAC Special Project:
Turn-key Air Handler Replacement
Chief Engineer, RXR 530 5th Ave.
The building required the replacement of aging air handlers to serve the 8th & 10th floors to precede the floor buildouts.
- Disconnect, remove & dispose of existing AHUs in Mechanical Equipment Rooms (MERs)
- Modify an existing 4” concrete housekeeping pad to accept new unit footprint
- Replace dampers for fresh air ducts
- Completely knocked down new AHUs at riggers yard to allow for rigging through building & elevators
- Deliver unit to site and rebuild on housekeeping pad in MER
- Deliver and install new return fan to MER, configure to maximize usable space within the room
- Modify the existing concrete masonry unit wall (CMU) to accept the new sleeves for the ductwork feed into the space
- Provide new duct transitions from new unit & fan to new sleeves in wall
- Provide new pipe connections from existing chilled water & steam outlets to new AHU
- Run new electric feed from existing panel with new VFD’s for new machines
- Complete a controls installation tied into the building management system (BMS)
- Insulate and label new piping & connections
- Provide & assist with factory startup
- Clean and restore workspace to original conditions
From the planning, de-commissioning and removal of the existing AHUs right through delivery, rigging, installation and commissioning of the new air handler units, Donnelly’s expert project management completed the complex project within the required schedule and estimate. Working with a single contractor afforded RXR simple and direct coordination, achieving considerable savings in time, costs, and headaches.