{"product_id":"tjernlund-products-mac1e","title":"Tjernlund Products MAC1E Control","description":"\u003cp\u003eThe \u003cstrong\u003eTjernlund MAC1E Multiple Appliance Control\u003c\/strong\u003e is an essential interface for sequencing \u003cstrong\u003edraft inducers\u003c\/strong\u003e or \u003cstrong\u003epower venters\u003c\/strong\u003e with multiple heating appliances. Specifically designed for 24 VAC control circuits, this \u003cstrong\u003einterlock control\u003c\/strong\u003e allows a single \u003cstrong\u003eexhaust fan\u003c\/strong\u003e to serve up to two separate gas-fired burners or water heaters. When any appliance calls for heat, the MAC1E energizes the fan and verifies the \u003cstrong\u003epressure switch\u003c\/strong\u003e circuit before allowing the burner to fire. This prevents flue gas spillage and ensures consistent \u003cstrong\u003ecombustion air\u003c\/strong\u003e flow across all connected equipment. The solid-state design provides reliable switching without the mechanical failure points common in generic relays, making it a standard for complex \u003cstrong\u003eventing systems\u003c\/strong\u003e in commercial and residential mechanical rooms.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Integration:\u003c\/strong\u003e Simplifies the simultaneous control of two appliances using a single \u003cstrong\u003eTjernlund power venter\u003c\/strong\u003e or \u003cstrong\u003edraft inducer\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Safety:\u003c\/strong\u003e Integrated \u003cstrong\u003einterlock\u003c\/strong\u003e logic ensures the venter is at full speed before the gas valve opens.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContractor Grade:\u003c\/strong\u003e Features a 4\" x 4\" J-box mounting configuration for rapid installation and wiring within existing electrical enclosures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Works seamlessly with 24V thermostat circuits and millivolt systems using supplementary transformers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eCan I connect more than two appliances to a single MAC1E?\u003c\/strong\u003e\u003cbr\u003e\nA single MAC1E is rated for two appliances. For systems with three or more appliances, additional MAC1E units must be daisy-chained to maintain proper sequencing and safety signal verification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the MAC1E provide its own power to the gas valve?\u003c\/strong\u003e\u003cbr\u003e\nNo, the MAC1E operates as a dry-contact or switching interface. It utilizes the 24V signal from the appliance's own control transformer to trigger the venting sequence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this control compatible with all Tjernlund venter models?\u003c\/strong\u003e\u003cbr\u003e\nYes, the MAC1E is designed to interface with the standard 24V trigger leads found on Tjernlund series fans, including the GPAK, VP, and HS models.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Tjernlund Products","offers":[{"title":"Default Title","offer_id":43465313419442,"sku":"MAC1E","price":232.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Screenshot_2023-11-30_133900-removebg-preview.png?v=1701380379","url":"https:\/\/www.gsistore.com\/products\/tjernlund-products-mac1e","provider":"GSIstore","version":"1.0","type":"link"}