{"product_id":"new-for-emerson-x-28894-71001-solenoid-valve-coil-asc2-24v-pcn015516-coil","title":"Emerson X-28894-71001 Solenoid Valve Coil 24V","description":"\u003c!-- SEO Introduction --\u003e\n\u003cdiv class=\"koeed-container\" style=\"line-height: 1.6; color: #333; width: 100%;\"\u003e\n    \u003ch2 style=\"color: #0056b3; border-left: 5px solid #16c8c8; padding-left: 15px; margin-top: 0;\"\u003eEmerson X-28894-71001 Solenoid Valve Coil 24V\u003c\/h2\u003e\n    \u003cp\u003e\n        The \u003cstrong\u003eEmerson X-28894-71001 Solenoid Coil\u003c\/strong\u003e is a premium, industrial-grade replacement coil designed for optimal performance in refrigeration, air conditioning (HVAC\/R), and fluid control applications. Operating on a standard \u003cstrong\u003e24V control circuit\u003c\/strong\u003e, it provides the vital electromagnetic force required to reliably actuate compatible Emerson (Alco Controls) solenoid valve bodies.\n    \u003c\/p\u003e\n    \u003cp\u003e\n        Engineered with a fully encapsulated, moisture-resistant housing, this coil is built to endure harsh commercial environments, preventing internal short circuits caused by condensation or ambient humidity. Its heavy-duty construction ensures continuous duty without excessive heat generation, minimizing downtime in critical cooling systems.\n    \u003c\/p\u003e\n\n    \u003c!-- Technical Specifications --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eDetailed Technical Specifications\u003c\/h3\u003e\n    \u003cdiv style=\"overflow-x: auto;\"\u003e\n        \u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #eeeeee;\"\u003e\n            \u003cthead\u003e\n                \u003ctr style=\"background-color: #16c8c8; color: white;\"\u003e\n                    \u003cth style=\"padding: 12px; text-align: left; border: 1px solid #eeeeee;\"\u003eParameter\u003c\/th\u003e\n                    \u003cth style=\"padding: 12px; text-align: left; border: 1px solid #eeeeee;\"\u003eSpecification Data\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eOEM Part Number\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eX-28894-71001\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eOperating Voltage\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e24V (Standard HVAC\/R Control Voltage)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eTypical Power Consumption\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eUsually in the range of 10VA to 20VA (Inrush VA is higher)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eVoltage Tolerance\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eTypically +10% to -10% (Min 21.6V required for stable pull-in)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eInsulation Class\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eClass F or H (High-temperature rating)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eEncapsulation\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eMolded Epoxy \/ Synthetic Resin\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eCompatibility\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eCompatible with designated Emerson\/Alco solenoid valve bodies (e.g., 200\/240 series)\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- Application \u0026 Reliability --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eIndustrial Application \u0026amp; Maintenance Value\u003c\/h3\u003e\n    \u003cp\u003e\n        The 24V control voltage is the backbone of commercial HVAC and building automation systems due to its safety and ease of routing. However, 24V systems are highly susceptible to voltage drop over long wire runs.\n    \u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLiquid Line Control:\u003c\/strong\u003e Used to stop refrigerant flow during pump-down cycles, preventing compressor liquid slugging on startup.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHot Gas Bypass:\u003c\/strong\u003e Actuating valves to manage capacity control in commercial chillers.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eReliability Note:\u003c\/strong\u003e The epoxy molding protects the copper windings from vibration and thermal shock. A failing coil usually exhibits degraded insulation, leading to short circuits or insufficient magnetic flux to overcome the valve's spring tension.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003c!-- Koeed B2B Tool: 24V Voltage Drop \u0026 Coil Health Calculator --\u003e\n    \u003cdiv id=\"koeed-voltage-tool\" style=\"background: #f9f9f9; border: 2px solid #16c8c8; border-radius: 8px; padding: 20px; margin: 30px 0;\"\u003e\n        \u003ch3 style=\"margin-top: 0; color: #16c8c8;\"\u003eFAE Tool: 24V Control Circuit Voltage Drop Calculator\u003c\/h3\u003e\n        \u003cp style=\"font-size: 0.9em; color: #666;\"\u003eWill your new 24V coil actuate reliably? Long thermostat or control wire runs cause voltage drop. If the voltage at the coil drops below 21.6V, the coil will buzz, overheat, and fail to pull in the valve. Use this tool to verify your wire gauge and distance.\u003c\/p\u003e\n        \n        \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; margin-bottom: 15px;\"\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eOne-Way Wire Distance:\u003c\/label\u003e\n                \u003cdiv style=\"display: flex; gap: 5px;\"\u003e\n                    \u003cinput type=\"number\" id=\"koeed-dist-input\" value=\"100\" min=\"1\" style=\"width: 70%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                    \u003cselect id=\"koeed-unit-input\" style=\"width: 30%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                        \u003coption value=\"ft\"\u003eFeet\u003c\/option\u003e\n                        \u003coption value=\"m\"\u003eMeters\u003c\/option\u003e\n                    \u003c\/select\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eWire Gauge (AWG):\u003c\/label\u003e\n                \u003cselect id=\"koeed-awg-input\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                    \u003coption value=\"18\"\u003e18 AWG (Thermostat wire - 6.38 Ω\/1000ft)\u003c\/option\u003e\n                    \u003coption value=\"16\"\u003e16 AWG (4.02 Ω\/1000ft)\u003c\/option\u003e\n                    \u003coption value=\"14\"\u003e14 AWG (2.52 Ω\/1000ft)\u003c\/option\u003e\n                    \u003coption value=\"12\"\u003e12 AWG (1.59 Ω\/1000ft)\u003c\/option\u003e\n                \u003c\/select\u003e\n            \u003c\/div\u003e\n        \u003c\/div\u003e\n\n        \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; margin-bottom: 15px;\"\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eTransformer Source Voltage:\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-v-input\" value=\"24\" step=\"0.5\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n            \u003c\/div\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eCoil Inrush Power (VA):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-va-input\" value=\"30\" min=\"1\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                \u003csmall style=\"color: #888;\"\u003e*Inrush VA is used to ensure the valve can initially open. Typical 24V AC inrush is 20-40 VA.\u003c\/small\u003e\n            \u003c\/div\u003e\n        \u003c\/div\u003e\n        \n        \u003cbutton onclick=\"koeedCalculateVDrop()\" style=\"background: #16c8c8; color: white; border: none; padding: 12px 24px; border-radius: 4px; cursor: pointer; font-weight: bold; transition: background 0.3s;\"\u003eCalculate Voltage at Coil\u003c\/button\u003e\n        \n        \u003cdiv id=\"koeed-vdrop-results\" style=\"margin-top: 20px; padding: 15px; background: white; border-radius: 4px; border-left: 5px solid #0056b3; display: none; box-shadow: 0 2px 4px rgba(0,0,0,0.05);\"\u003e\n            \u003cdiv style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eVoltage Drop:\u003c\/strong\u003e \u003cspan id=\"koeed-drop-out\" style=\"color: #333; font-weight: bold; font-size: 1.1em;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eActual Voltage at Coil:\u003c\/strong\u003e \u003cspan id=\"koeed-actual-v-out\" style=\"color: #0056b3; font-weight: bold; font-size: 1.2em;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cp id=\"koeed-diag-msg\" style=\"font-size: 0.9em; margin-top: 10px; font-weight: bold;\"\u003e\u003c\/p\u003e\n        \u003c\/div\u003e\n\n        \u003cnoscript\u003e\n            \u003cp\u003e\u003cstrong\u003eSEO Tool Formula:\u003c\/strong\u003e To calculate 24V voltage drop: I = VA \/ Voltage. Voltage Drop = (2 x Distance in feet x Resistance per foot) x I. A 24V coil requires a minimum of 21.6V (-10%) to reliably pull the magnetic plunger. If standard 18 AWG thermostat wire is run too far, the voltage drop will cause the coil to chatter and eventually burn out.\u003c\/p\u003e\n        \u003c\/noscript\u003e\n    \u003c\/div\u003e\n\n    \u003cscript\u003e\n        function koeedCalculateVDrop() {\n            const distVal = parseFloat(document.getElementById('koeed-dist-input').value);\n            const unit = document.getElementById('koeed-unit-input').value;\n            const awgRes = parseFloat(document.getElementById('koeed-awg-input').value); \/\/ This is ohms per 1000ft\n            const sourceV = parseFloat(document.getElementById('koeed-v-input').value);\n            const va = parseFloat(document.getElementById('koeed-va-input').value);\n            \n            const resultsBox = document.getElementById('koeed-vdrop-results');\n            const diagMsg = document.getElementById('koeed-diag-msg');\n\n            if (isNaN(distVal) || isNaN(sourceV) || isNaN(va) || distVal \u003c= 0 || sourceV \u003c= 0) {\n                alert(\"Please enter valid positive numbers.\");\n                return;\n            }\n\n            \/\/ Convert distance to feet if necessary\n            let distFeet = unit === 'm' ? distVal * 3.28084 : distVal;\n\n            \/\/ Resistance values per 1000 ft based on standard solid copper wire\n            let ohmsPer1000ft = 0;\n            switch(awgRes) {\n                case 18: ohmsPer1000ft = 6.38; break;\n                case 16: ohmsPer1000ft = 4.02; break;\n                case 14: ohmsPer1000ft = 2.52; break;\n                case 12: ohmsPer1000ft = 1.59; break;\n                default: ohmsPer1000ft = 6.38;\n            }\n\n            \/\/ Calculate Current (Amps) based on VA and Source Voltage\n            const currentAmps = va \/ sourceV;\n\n            \/\/ Calculate Voltage Drop (2-wire circuit, so round trip is 2 * distance)\n            const wireResistance = (2 * distFeet * ohmsPer1000ft) \/ 1000;\n            const voltageDrop = currentAmps * wireResistance;\n            \n            const voltageAtCoil = sourceV - voltageDrop;\n\n            document.getElementById('koeed-drop-out').innerHTML = voltageDrop.toFixed(2) + \" Volts\";\n            document.getElementById('koeed-actual-v-out').innerHTML = voltageAtCoil.toFixed(2) + \" V\";\n            \n            \/\/ Diagnostic threshold: typically coils need at least -10% of nominal rating (24V * 0.9 = 21.6V)\n            if (voltageAtCoil \u003e= 21.6) {\n                diagMsg.innerHTML = \"✅ STATUS: PASS. The voltage at the coil is above the 21.6V threshold. The valve should actuate reliably.\";\n                diagMsg.style.color = \"#2e7d32\";\n            } else if (voltageAtCoil \u003e 19.2) {\n                diagMsg.innerHTML = \"⚠️ STATUS: MARGINAL. Voltage is below 21.6V. The coil may struggle to open under high pressure differentials or may buzz. Consider upgrading to a thicker wire gauge (e.g., 16 AWG).\";\n                diagMsg.style.color = \"#f57c00\";\n            } else {\n                diagMsg.innerHTML = \"❌ STATUS: FAIL. Voltage is critically low. The coil will not pull in the plunger and may overheat and burn out due to sustained inrush current. You must increase wire thickness or install a local step-down transformer.\";\n                diagMsg.style.color = \"#d32f2f\";\n            }\n\n            resultsBox.style.display = 'block';\n        }\n    \u003c\/script\u003e\n\n    \u003c!-- Troubleshooting FAQ --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eSolenoid Coil Troubleshooting FAQ\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003e1. Why is my 24V solenoid coil making a loud buzzing or chattering noise?\u003c\/strong\u003e\u003cbr\u003e\n    A buzzing AC solenoid coil is typically caused by one of three issues: (A) Low voltage at the coil (check with a multimeter while it's energized, it must be \u0026gt;21.6V). (B) Dirt or debris caught between the magnetic armature and the core tube inside the valve, preventing a solid magnetic seal. (C) A broken shading ring inside the coil, which normally prevents the magnetic field from dropping to zero during the AC sine wave cycle.\u003c\/p\u003e\n    \n    \u003cp\u003e\u003cstrong\u003e2. The coil feels extremely hot to the touch. Is it burnt out?\u003c\/strong\u003e\u003cbr\u003e\n    Solenoid coils normally run very warm (often up to 80°C \/ 175°F) during continuous duty. However, if it smells like melting plastic or is hot enough to instantly blister skin, it is overheating. This happens if the plunger is jammed and cannot fully seat, causing the coil to continuously draw high \"inrush\" current instead of dropping down to its lower \"holding\" current.\u003c\/p\u003e\n\n    \u003cp\u003e\u003cstrong\u003e3. How do I test the X-28894-71001 coil with a multimeter?\u003c\/strong\u003e\u003cbr\u003e\n    Disconnect the power. Set your multimeter to the Ohms (Ω) setting and measure across the two coil lead wires. While exact resistance varies slightly by batch, a healthy 24V AC coil usually reads between 10 to 40 Ohms. If the meter reads \"OL\" (Open Loop) or infinite resistance, the internal copper winding is snapped and the coil is dead. If it reads near 0 Ohms, it is internally shorted and will blow your control fuse.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- Structured Data --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why is my 24V solenoid coil buzzing or chattering?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Buzzing is caused by low control voltage (voltage drop), debris inside the valve core tube preventing a flush magnetic seal, or a damaged internal shading ring on AC coils. Ensure voltage at the coil under load is at least 21.6V.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How hot should a 24V solenoid coil get?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"It is normal for continuous-duty solenoid coils to run hot to the touch. However, if it emits a burning odor or gets hot enough to cause burns instantly, the internal plunger may be jammed, causing the coil to draw sustained high inrush current.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How to test a 24V solenoid coil with a multimeter?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Disconnect power and measure the resistance (Ohms) across the two coil wires. A good 24V coil typically reads between 10 to 40 Ohms. An 'OL' or infinite reading means the coil winding is broken. A reading near zero means it is shorted.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"WebApplication\",\n  \"name\": \"24V Control Circuit Voltage Drop Calculator\",\n  \"description\": \"Calculates the voltage drop over wire distances for 24V control circuits to ensure HVAC and industrial solenoid coils receive sufficient actuation voltage.\",\n  \"applicationCategory\": \"EngineeringTool\",\n  \"operatingSystem\": \"Any\"\n}\n\u003c\/script\u003e","brand":"EMERSON","offers":[{"title":"Default Title","offer_id":44421064884409,"sku":"314924484076","price":192.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/s-l1600_2221edc0-5102-4dcc-9432-6ee692ecaabc.png?v=1724124486","url":"https:\/\/koeed.com\/products\/new-for-emerson-x-28894-71001-solenoid-valve-coil-asc2-24v-pcn015516-coil","provider":"KOEED","version":"1.0","type":"link"}