CSR-U2 Hard Start Capacitor Kit - Fits Air Conditioner 3 1/2 to 5 Ton Units

CSR-U2 Hard Start Capacitor Kit - Fits Air Conditioner 3 1/2 to 5 Ton UnitsCSR U2 Hard Start Capacitor Kit Key Features Combines a high power starting capacitor with an electronic potential relay. Increases compressor starting torque for faster, more reliable start ups. Reduces start up time, minimizing electrical stress on compressor windings and run capacitor. Lowers inrush current, preventing light dimming and nuisance circuit breaker trips. Designed as a three wire kit for straightforward installation. Replaces Cross

CSR-U2 Hard Start Capacitor Kit

Key Features

• Combines a high-power starting capacitor with an electronic potential relay.
• Increases compressor starting torque for faster, more reliable start-ups.
• Reduces start-up time, minimizing electrical stress on compressor windings and run capacitor.
• Lowers inrush current, preventing light dimming and nuisance circuit breaker trips.
• Designed as a three-wire kit for straightforward installation.

Replaces / Cross-Reference Part Numbers

• CSR-U2
• Replaces various OEM and aftermarket hard start kits with similar voltage and tonnage specifications.

Compatibility & Fitment

• For use with single-phase 208V, 230V, and 265V air conditioning and heat pump systems.
• Designed for compressors rated from 3.5 to 5 tons.
• Compatible with residential and light commercial PSC (Permanent Split Capacitor) compressor motors.

When to Replace

• Install when the compressor struggles to start, especially during high ambient temperatures.
• Recommended if lights dim noticeably when the A/C or heat pump activates.
• Addresses issues of humming or buzzing noises from the compressor during failed start attempts.
• A solution for frequent circuit breaker tripping upon system start-up.
• Can be installed proactively on aging systems to extend compressor and component life.

Installation Tips

• Disconnect all electrical power to the HVAC unit at the breaker and service disconnect before beginning work.
• Verify the kit's specifications match your system's voltage and compressor tonnage rating.
• Mount the device securely inside the control panel, away from excessive moisture and moving parts.
• Follow the included wiring diagram precisely to ensure correct connections to the run capacitor and compressor terminals.
• Confirm all wire connections are tight and properly insulated before restoring power.