{"product_id":"diversitech-seqhdr222-heat-sequencer-2-dpst-4-switches","title":"Diversitech SEQHDR222 Heat Sequencer 2 Dpst 4 Switches","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe DIVERSITECH SEQHDR222 is a heat sequencer control designed for ducted electric heat systems that require staged heating operation. It features two independent timing elements, each operating a double-pole single-throw (DPST) normally open contact set, giving the unit four total switching contacts. Delay-on timing ranges from 1 to 40 seconds, and delay-off timing ranges from 50 to 110 seconds. These adjustable timing ranges allow four heating circuits to be staged on and off in sequence, reducing inrush current draw and controlling heat strip operation across multiple stages. Licensed HVAC technicians install this control in electric furnaces and air handlers.\u003c\/p\u003e\n\u003cp\u003eThis sequencer is intended for ducted electric heat applications where staged activation of heating elements is required. Common install scenarios include electric furnaces, electric air handlers, and package units with multiple heat strips. The two-stage sequencing design staggers element activation to prevent simultaneous full-load startup across all circuits. It serves residential and light commercial ducted heating systems configured with four-circuit electric heat arrangements.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo independent timing elements for true two-stage heat sequencing\u003c\/li\u003e\n  \u003cli\u003eFour DPST normally open switch contacts for four heating circuits\u003c\/li\u003e\n  \u003cli\u003eDelay-on range of 1 to 40 seconds for staged element activation\u003c\/li\u003e\n  \u003cli\u003eDelay-off range of 50 to 110 seconds for controlled element shutdown\u003c\/li\u003e\n  \u003cli\u003eReduces inrush current by staggering heat strip startup across stages\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement sequencer for ducted electric heat systems requiring four switched heating circuits with two-stage timing control.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician. Disconnect all electrical power to the unit before removing or installing the sequencer. Verify that the replacement sequencer contact ratings match the load requirements of the heating elements before energizing. Follow all applicable NEC requirements for electric heating equipment service and wiring.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTiming Elements\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Configuration\u003c\/strong\u003e: 2 DPST normally open\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Switches\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDelay On\u003c\/strong\u003e: 1 to 40 seconds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDelay Off\u003c\/strong\u003e: 50 to 110 seconds\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: DIVERSITECH\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: SEQHDR222\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DIVERSITECH","offers":[{"title":"Default Title","offer_id":51342765621554,"sku":"SEQHDR222","price":101.34,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310555385.png?v=1782005968","url":"https:\/\/voomisupply.com\/products\/diversitech-seqhdr222-heat-sequencer-2-dpst-4-switches","provider":"Voomi Supply","version":"1.0","type":"link"}