5-2-1® Compressor Saver®

5-2-1 Compressor Saver - CSRU3 - 4 & 5 Ton Hardstart Device

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4 & 5 Ton Hardstart Device


A 5-2-1 Compressor Saver® (aka Hard Start Kit) significantly reduces the amount of time your AC Compressor takes to Start. Air conditioners with the 5-2-1 Compressor Saver® typically start in 30-50% less time than air conditioners without the product.

This is important because the compressor on your air conditioner consumes more power on start up than any other device in your home. Start up is the hardest time in the life of any type of electrical equipment.Light bulbs almost always burn out when you first turn them on and not while they are on. This is due to the huge current that rushes in when a switch is thrown and power is first applied.

The heat that accompanies the in-rush current can damage vital electrical components - the air conditioner compressor, the air conditioner run capacitor and contacts. An ac compressor may consume 45,000 watts of power while the motor is trying to start - TEN times more power than it uses while running. By comparison, the large burner on an electric stove only consumes approximately 5,000 watts on high.

An air conditioner can start up more than 6,000 times in a single air conditioning season. With a 5-2-1 Compressor Saver® you will reduce ac repairs and the need for air conditioning service.

Some top-of-the-line air conditioners come from the factory with 5-2-1 technology built in. Now you can have a 5-2-1 Compressor Saver® installed in your existing ac unit by a professional.

The cost of a 5-2-1 Compressor Saver® is a fraction of the cost of replacing an ac compressor damaged by hard starts. It could add years to the life of your compressor and other electrical components associated with your a/c system.

California residents: see Proposition 65 Warning

Features and Specification

Height 6.5000
Evaporating Temperature 35°F to 55°F (1.6°C to 12.7°C)
Features 5-2-1 Method is approved by all major Compressor Manufacturers
For Use With 1 - 5 HP
Length 6.5000
EAN 0854046521308
Capacitor MFD µF 270-324
Amps 35
Application 4-5 Ton Air Conditioners
Brand 5-2-1® Compressor Saver®
Drop Out Voltage 50
Cubic Measurement 0.0734
Cycle/Hertz 60
Dimensional Weight 1.0000
Maximum Coil Voltage 440
Width 3.0000
Type Device
UL Recognized Yes
UPC 854046521308
Voltage 208-240 VAC
Warranty Offered Yes
Package Length 3.0000
Phase Single
Pick Up Voltage 175-195
Package Height 7.0000
Package Weight 5.2500
Relay Type Potential
Package Width 5.5000
Rated Load Amps 35
Weight 0.0563


picture_as_pdf specification sheet

picture_as_pdf consumer literature