When the heat exchanger is part of a central system, where should shut-off valves be installed?

The installation of shut-off valves on the building supply and return is crucial for effective maintenance and operation of the heat exchanger in a central HVAC system. Shut-off valves allow for easy isolation of the heat exchanger from the system, facilitating maintenance, repairs, or replacement without affecting the entire heating or cooling circuit.

By placing these valves on both the supply and return lines, a technician can completely isolate the heat exchanger. This ensures that any work performed does not disrupt the service to the rest of the building. It also minimizes the risk of fluid leaks or pressure issues while the heat exchanger is being serviced.

This approach enhances the overall reliability and efficiency of the HVAC system, as it allows for timely interventions while ensuring the system can continue operating smoothly when maintenance is not being performed.