Hard start kits are typically required on which type of systems?

Hard start kits are frequently associated with systems that utilize reciprocating compressors, particularly in configurations where thermostatic expansion valves (TXVs) are employed for metering refrigerant. A hard start kit serves to provide an initial boost of electrical current to the compressor during startup, helping it overcome the inertia of the compressor's motor and ensuring a smooth and efficient startup cycle.

In systems featuring reciprocating compressors, the high starting torque requirement can create challenges, especially in conditions where refrigerant is not sufficiently vaporized or during low ambient temperatures. The inclusion of a thermostatic expansion valve adds another layer to this, as these systems typically require precise control of refrigerant flow and may experience increases in workload during startup.

By implementing a hard start kit in these systems, technicians can enhance the reliability and efficiency of compressor operation, minimizing the risk of failure associated with inadequate starting conditions. Therefore, hard start kits are most fitting in systems that combine reciprocating compressors with TXVs.