Description
The York S1-2940-3571 Sequencer is an electrical controller that is intended to control the function of several compressors in an HVAC system. It also has the responsibility of controlling the starting and stopping of the compressors concerning the system needs. This makes it possible to have a fixed number of compressors required for cooling or heating load to be met without having to pull in unnecessary energy. The sequencer usually works in a cascaded manner, where certain types of compressors are brought on or offline in a specific sequence. Such staged operation is instrumental in maintaining system load, preventing overloading of specific compressors, and increasing system reliability.
