In a downtown building, mechanical equipment does not get to quietly fade into the background forever.
Eventually, the plant reaches a decision point.
At 100 N Broadway in St. Louis, that moment had arrived. Two existing YORK chillers had reached the end of their service life. They had done their job for years, but the building needed its next chapter of central plant performance.
The solution was not just to replace old equipment.
It was to protect the building’s cooling infrastructure with modern YORK centrifugal chiller technology, coordinated installation planning, and service-focused equipment selection.
Midwest Machinery supplied two new YORK YK centrifugal chillers for the project, with installation handled by Jarrell Mechanical Contractors.
The Hidden Risk in Waiting Too Long
Large commercial buildings depend on their chilled water plants in ways most occupants never notice.
When the system is working, no one thinks about it.
When it is not, everyone does.
That is the problem with end-of-service-life equipment. The risk does not always announce itself early. It shows up as rising maintenance concerns, reduced confidence, aging components, and less room for error when the building needs reliable cooling.
For 100 N Broadway, the smarter move was to get ahead of that risk before the equipment became the story.
Staying With YORK Was a Strategic Choice
The original chillers were YORK. The replacement chillers are YORK.
That matters.
For the building team, this was not a guessing game with an unfamiliar platform. Staying with YORK allowed the central plant to continue with a proven chiller foundation while upgrading to newer equipment, modern controls, and improved operating capabilities.
The project included two YORK YK centrifugal chillers, selected for the demands of a downtown commercial building and configured with:
- R-513A refrigerant
- 460V, 3-phase, 60 Hz motors
- Factory-mounted and wired variable speed drives with filters
- Isolation valves
- Smart Equipment controls
- Compact evaporator water boxes
- Condenser water boxes
- Grooved nozzle connections
- Hinged water boxes for service access
- Enhanced copper tube construction
- Factory evaporator insulation
- Factory chiller startup
This Was Not a Simple Drop-In Replacement
Replacing major central plant equipment in a downtown building is not just a purchasing decision.
It is a coordination challenge.
The new YORK chillers had to be craned up to the mechanical room, which meant access, timing, rigging coordination, site logistics, and installation sequencing all had to be handled carefully.
That kind of replacement work rewards planning.
It also punishes assumptions.
Mechanical rooms in existing buildings rarely offer perfect conditions. Equipment paths, service clearances, connection locations, and installation constraints all matter. This is where project experience becomes more than a nice-to-have. It becomes part of the risk management strategy.
Built for the Next Service Life
The new YORK YK centrifugal chillers were selected with long-term plant operation in mind.
Variable speed drives help the equipment respond to changing building load conditions instead of operating as though every day is a peak-load day. That supports more efficient operation during part-load conditions, where commercial systems often spend much of their runtime.
The chillers also include service-focused features that matter after installation day, including hinged water boxes, grooved nozzle connections, isolation valves, factory insulation, and factory startup support.
Those details may not make headlines, but they affect the people responsible for keeping the building running.
Better access means easier maintenance. Better coordination means fewer surprises. Better equipment selection means a central plant that is prepared for the work ahead.
Project Snapshot
Building: 100 N Broadway, St. Louis, Missouri
Application: Replacement of existing YORK chillers at end of service life
Equipment Supplied: YORK YK Centrifugal Chillers
Quantity: 2
Refrigerant: R-513A
Installation Note: Chillers craned up to mechanical room
Contractor: Jarrell
Equipment Representative: Midwest Machinery
The Result
At 100 N Broadway, the old YORK chillers had reached the end of their run.
The building team did not wait for failure to force the decision.
They moved to modernize the plant with new YORK centrifugal chillers, coordinated installation support, and equipment built for reliable long-term operation.
That is the difference between replacing equipment and protecting a building’s infrastructure.
For Midwest Machinery, this project reflects the kind of work we are built to support: technical equipment selection, contractor coordination, manufacturer-backed solutions, and commercial HVAC expertise for buildings that cannot afford uncertainty.
Repair It Or Replace It? Find Out Before It Becomes An Emergency.
Aging chillers rarely fail at a convenient time.
Use our Chiller Decision Guide to compare repair costs, equipment age, efficiency, and reliability factors to see which path makes the most sense for your facility. The result is a clearer decision before downtime forces one. Based on common repair-vs-replace evaluation factors used throughout the industry.
