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5-2-1 Compressor Saver CSRU2 Hard Start Kit with potential relay, start capacitor, mounting screws and zip-tie

5-2-1 Compressor Saver CSRU2 Hard Start Kit

SKU CH-34DZ-QCGHQ

Installs on 3½–5 ton reciprocating or scroll compressors with a 189–227 MFD capacitor and electronic potential relay for 208–240 V AC instant restart

  • Reduces compressor stress with electronic potential relay
  • Handles 3.5 to 5 ton cooling capacity range
  • Supports instant restart after power interruption
  • Operates on 208 to 240V AC control voltage
  • Includes capacitor, relay, screws and zip-tie

What it is

The 5-2-1 Compressor Saver CSRU2 is a hard start kit designed for HVAC compressors. It combines a potential relay with a start capacitor rated at 189-227 MFD. The kit operates on 208-240V AC control voltage and supports cooling capacities from 3 1/2 to 5 ton. It includes the relay, capacitor, mounting screws and a zip-tie for installation.

Who it suits

This kit suits technicians servicing reciprocating or scroll compressors rated between 3 1/2 and 5 hp. It provides instant restart capability with a pick-up voltage of 180-195V using a three-wire connection. Installers needing a different voltage range, a different capacitor rating or a kit for a compressor outside the stated horsepower range should look at other options.

Deciding specification

The capacitor microfarad rating of 189-227 MFD is the critical value that determines compatibility with the target compressor. Match this rating to the manufacturer specification for the unit being repaired. The control voltage must also align with the 208-240V AC supply at the installation site.

Highlights

  • Reduces compressor stress with electronic potential relay
  • Handles 3.5 to 5 ton cooling capacity range
  • Supports instant restart after power interruption
  • Operates on 208 to 240V AC control voltage
  • Includes capacitor, relay, screws and zip-tie

Specifications

Brand5-2-1 COMPRESSOR SAVER

Questions about this item

When does the 189-227 MFD capacitor typically need replacement?

The capacitor operates at 208-240V AC with a 180-195V pick-up voltage; service life depends on duty cycle and ambient conditions, so schedule inspection during routine HVAC maintenance.

What limit appears first when the kit runs continuously on a 5 hp compressor?

The 5 hp maximum rating and 227 MFD upper capacitance define the sustained-load boundary; exceeding either trips the potential relay or stresses the capacitor.

How hot does the potential relay get during all-day operation?

The electronic potential relay switches at 180-195V pick-up across the 208-240V control range; normal temperature rise stays within relay design limits for 3.5-5 ton reciprocating and scroll compressors.

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