Lennox X4484 – CPS CSRU2 5-2-1 Hard Start Kit is a reliable compressor saver designed to improve starting performance and reduce electrical stress on residential and light commercial air conditioning systems. Manufactured by CPS, this 5-2-1 series hard start kit delivers increased starting torque while lowering startup amperage, helping prevent hard starts caused by low voltage, long line runs, or aging compressors.

The CSRU2 hard start kit is engineered for 3.5 to 5 ton A/C units and combines a high-capacity start capacitor with a solid-state potential relay for fast, efficient compressor startup. With a capacitor range of 189–227 MFD and compatibility with 208–240 VAC systems, it helps extend compressor life and restore dependable cooling performance. This hard start compressor saver is ideal for replacement applications or preventative maintenance where improved startup reliability is required.

Product specifications
Brand: CPS
Catalog number: X4484
Model / part number: CSRU2
Type: 5-2-1 hard start compressor saver
Application: 3.5–5 ton air conditioners
Voltage: 208–240 VAC
Frequency: 60 Hz
Capacitor range: 189–227 MFD
Wires: 3
Product size: 6 in L x 2 in W x 6 in H
Gross weight: 0.9 lb
Accessory type: Start kit

This OEM-quality hard start kit is a dependable solution for improving compressor startup performance and protecting HVAC systems from premature electrical wear.