{"product_id":"compressor-saver-hard-start-assist-kit-for-3-5-5-ton-compressors","title":"Compressor Saver Hard Start Assist Kit | For 3.5 - 5 Ton Compressors","description":"\u003ch1\u003e\u003cstrong\u003e5-2-1 Compressor Saver CSRU2 Hard Start Kit | 3.5 - 5 Ton HVAC Units | OEM 3-Wire Potential Relay\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe 5-2-1 Compressor Saver CSRU2 is the industry-standard \"\u003cstrong\u003einsurance policy\u003c\/strong\u003e\" for high-performance air conditioning systems. Specifically engineered for \u003cstrong\u003e3.5 to 5-ton condensing units\u003c\/strong\u003e, this hard start device acts as a \u003cstrong\u003ehigh\u003c\/strong\u003e-\u003cstrong\u003etorque booster \u003c\/strong\u003efor your \u003cstrong\u003ecompressor's \u003c\/strong\u003e\"brain\" during the most critical stage: \u003cstrong\u003estartup\u003c\/strong\u003e. By utilizing a heavy-duty start capacitor and a precision \u003cstrong\u003ePotential Relay\u003c\/strong\u003e, the \u003cstrong\u003eCSRU2 reduces \u003c\/strong\u003ethe duration of \u003cstrong\u003ehigh-amp inrush current\u003c\/strong\u003e by up to \u003cstrong\u003e50\u003c\/strong\u003e%. This significantly lowers heat buildup within the compressor windings, preventing premature failure and helping older systems overcome \"stuck\" or hard-starting conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue 3-Wire Technology: \u003c\/strong\u003eUnlike cheap 2-wire \"PTC\" boosters, the CSRU2 uses a 3-wire connection to accurately sense when the motor has started, safely disconnecting the capacitor in milliseconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtends Compressor Life: \u003c\/strong\u003eDramatically reduces the \"inrush current\" (LRA) that causes internal heat damage and light flickering during AC startup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Reliability:\u003c\/strong\u003e Features a genuine high-quality potential relay and a heavy-duty start capacitor, the same technology used by manufacturers in premium high-efficiency units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Designed specifically for large-scale residential and light commercial systems ranging from 3-1\/2 to 5 Tons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Focused:\u003c\/strong\u003e Protects your expensive compressor from the stress of low-voltage brownouts and high-head pressure starts during extreme summer heat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e 5-2-1® Compressor Saver®\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e CPS Products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e CSRU2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Tonnage:\u003c\/strong\u003e 3.5, 4.0, and 5.0 Ton Units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 204V - 240V (Single Phase)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay Type:\u003c\/strong\u003e Potential Relay (Non-Electronic)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacitor Type:\u003c\/strong\u003e High-Microfarad Start Capacitor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e 3-Wire (Black, Red, Striped)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e🛠️ HVAC Depot Pro Tip\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe 5-2-1 kit is superior to 2-wire kits because it doesn't stay in the circuit too long. When installing, follow the \"5-2-1\" rule for the relay terminals: Terminal 5 goes to Common, Terminal 2 goes to Start, and Terminal 1 goes to the Capacitor. Always secure the kit vertically within the electrical cabinet using the provided mounting screw to prevent vibration damage to the internal relay mechanism.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces\/Supersedes:\u003c\/strong\u003e Generic 2-Wire Hard Starts (SPP6, HS600, etc.)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy\/Drawing Numbers:\u003c\/strong\u003e CSRU-2, 521-CSRU2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent Brands:\u003c\/strong\u003e Kickstart TO-5, Rectorseal KS-1, Supco SPP8E (Electronic equivalent)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eModel Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal: \u003c\/strong\u003e3.5 - 5 Ton Systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarrier \/ Bryant \/ Payne: \u003c\/strong\u003e (Suffixes: 38, 48, 50 Series)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrane \/ American Standard: \u003c\/strong\u003e(Suffixes: XR13, XR14, XR15, XV)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRheem \/ Ruud: \u003c\/strong\u003e(Suffixes: RA13, RA14, RP14, RP15)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodman \/ Amana: \u003c\/strong\u003e (Suffixes: GSX, GSZ, ASZ, ASX)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLennox \/ Armstrong: \u003c\/strong\u003e (Suffixes: 13ACX, 14ACX, XC Series)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HVAC Depot","offers":[{"title":"Default Title","offer_id":52451488498027,"sku":"CSRU2","price":75.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/original_28c020c5-cb1e-4dfc-a93f-b155858bf4b4.png?v=1760124047","url":"https:\/\/tophvacparts.com\/products\/compressor-saver-hard-start-assist-kit-for-3-5-5-ton-compressors","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}