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Small rectangular box with wires and mounting hardware

5-2-1 COMPRESSOR SAVER CSRU1 Hard Start Kit

SKU CH-XWAY-9TG1C

Hard start kit with potential relay and capacitor for 1–3 ton reciprocating or scroll compressors, 208–240 V AC, 88–108 MFD, 4–5 hp

  • Extends compressor life with 88-108 MFD capacitor
  • Reduces start-up current via electronic potential relay
  • Enables instant restart after power interruption
  • Compatible with 1-3 ton reciprocating and scroll compressors
  • Operates on 208-240V AC control voltage

5-2-1 Compressor Saver for 1-3 ton units

The 5-2-1 Compressor Saver CSRU1 is a hard-start kit designed for residential and light-commercial air-conditioning and heat-pump systems rated between 1 and 3 tons. It suits reciprocating and scroll compressors rated from 4 to 5 horsepower. The kit includes a start capacitor, an electronic potential relay, mounting screws and a zip-tie for installation.

Capacitor and voltage operating limits

The supplied start capacitor is rated at 88 to 108 microfarads and operates on a control voltage of 208 to 240 volts AC. The potential relay picks up between 162 and 175 volts, providing instant restart capability after brief power interruptions. These electrical parameters define the practical limits of the kit and must match the compressor’s nameplate data for reliable operation.

Verify compressor specs and wiring before ordering

Confirm that the target compressor falls within the 1 to 3 ton cooling capacity range and the 4 to 5 horsepower rating before purchase. Ensure the system runs on 208 to 240 volt single-phase power and uses a three-wire configuration compatible with the included relay. Check that the compressor’s locked-rotor amperage and run-capacitor values are suitable for the 88 to 108 microfarad start capacitor supplied.

Highlights

  • Extends compressor life with 88-108 MFD capacitor
  • Reduces start-up current via electronic potential relay
  • Enables instant restart after power interruption
  • Compatible with 1-3 ton reciprocating and scroll compressors
  • Operates on 208-240V AC control voltage

Specifications

Brand5-2-1 COMPRESSOR SAVER

Questions about this item

Should I choose this kit for a 1-ton scroll compressor or a 3-ton reciprocating unit?

It covers cooling capacities from 1 to 3 tons and works with both reciprocating and scroll compressors in that range.

What does the 88-108 MFD capacitor rating mean once the kit is installed?

The start capacitor supplies 88 to 108 microfarads to give the compressor a strong boost during startup.

How does the 208-240 V AC control voltage affect what the relay can handle?

The potential relay is designed to operate on 208 to 240 V AC control circuits and picks up between 162 and 175 V.

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