Copeland Compressor ZPS60K5E-PFV-800 is a two-stage Scroll UltraTech Compressor. The compressor has a single phase motor and uses R410A as refrigeration type. Operates at 208-230V.

The ZPS*K5 are Two Step Modulated Copeland Scroll UltraTech Compressors. These version has better part load and full load performance than ZPS*K4. The ZPS*K5 are suitable for residential and light commercial where a capacity step reduction and part load efficiency are important. 

A 24 volt DC solenoid valve inside the compressor provides the means to modulate the compressor. When the solenoid valve is energized the compressor is in full-load and when de-energized the compressor is in part-load. When the ZPS*K5 solenoid is energized a 3-way solenoid valve provides pressure to a lift ring assembly that is used to open and close the scroll modulation ports. A single-speed motor continues to run while the scroll modulates between the two capacity steps.

Capacity Control The compression process of a scroll compressor is described in AE4-1331. At any point in the compression process, there are several pockets within the scroll that are compressing gas. Modulation is achieved by venting a portion of the gas in the first suction pocket back to the low side of the compressor thereby reducing the effective displacement of the compressor. Full capacity is achieved by blocking these ports, thus increasing the displacement to 100%. When the solenoid is energized the compressor is in full-load or 100% of its capacity. When the solenoid is de-energized the compressor is in part-load or approximately 67% of its full load capacity. The loading and unloading of the two-step scroll is done “on the fly” without shutting off the motor between steps.

The unloaded mode default was chosen for two reasons:

1. It is expected that the majority of run hours will be in a low capacity, unloaded mode.
2. It allows a simple two-stage thermostat to control capacity through the second stage in both cooling and heating.