Field glossary

Changeover

A two-pipe arrangement that switches the whole zone between chilled and heating water seasonally; four-pipe avoids it

Used across 3 Anvilfield field guides, most in HVAC.

Also defined as

The wet-bulb-based control point at which the plant enables or drops free cooling, with an offset and deadband
Switching the system between heating and cooling when zones call for opposite modes

Where this shows up