{"product_id":"mars-mars-43306-condenser-fan-cycling-switch-spst","title":"Mars mars-43306 Condenser Fan Cycling Switch Spst","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MARS mars-43306 is an auto-reset condenser fan cycling switch designed to control condenser fan motor operation based on refrigerant pressure. Wired as a single-pole, single-throw (SPST) configuration, it closes on a rise in pressure, energizing the condenser fan when system head pressure climbs to the set point and de-energizing it as pressure drops. The switch resets automatically, eliminating the need for manual intervention after a pressure event. Licensed HVAC technicians install this switch as part of standard condenser fan cycling control strategies on air-cooled refrigeration and air conditioning equipment.\u003c\/p\u003e\n\u003cp\u003eThis switch is suited for use in commercial refrigeration systems, rooftop units, and air-cooled condensing units where head pressure management is critical to system efficiency and compressor protection. It is typically installed in the high-side refrigerant circuit and operates within a pressure range of 250 to 350 psi. Applications include both new installations and field replacement of failed or out-of-calibration cycling controls in low-ambient or head-pressure control systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAuto-reset operation eliminates manual reset after pressure normalization\u003c\/li\u003e\n  \u003cli\u003eSPST close-on-rise configuration energizes condenser fan on rising head pressure\u003c\/li\u003e\n  \u003cli\u003ePressure operating range of 250 to 350 psi for high-side circuit control\u003c\/li\u003e\n  \u003cli\u003eSupports head pressure control strategies in air-cooled refrigeration and AC systems\u003c\/li\u003e\n  \u003cli\u003eOEM-style replacement design for field service and new installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement condenser fan cycling switch for air-cooled refrigeration and commercial air conditioning condensing units requiring a high-side SPST close-on-rise pressure control in the 250 to 350 psi operating range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC or refrigeration technician holding the appropriate EPA Section 608 certification. Recover or isolate refrigerant and relieve system pressure before removing or installing any pressure-actuated control. Follow NEC requirements for low-voltage control wiring connections to the switch terminals. Verify that the replacement switch pressure range matches the system design before returning the unit to service.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Type\u003c\/strong\u003e: SPST Close On Rise\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReset Type\u003c\/strong\u003e: Auto Reset\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Range\u003c\/strong\u003e: 250 to 350 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Condenser Fan Cycling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 39121529\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MARS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: mars-43306\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MARS","offers":[{"title":"Default Title","offer_id":51138640085298,"sku":"MARS-43306","price":57.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305532174.png?v=1778260949","url":"https:\/\/voomisupply.com\/products\/mars-mars-43306-condenser-fan-cycling-switch-spst","provider":"Voomi Supply","version":"1.0","type":"link"}