{"product_id":"engo-etr-868-wireless-relay-controller-868mhz-230v-no-wire-zone-control-for-pumps-boilers-lighting","title":"ENGO ETR-868 Wireless Relay Controller 868MHz 230V – No-Wire Zone Control for Pumps, Boilers \u0026 Lighting","description":"\u003cstyle\u003e\n  .engo-desc * { box-sizing: border-box; }\n  .engo-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .engo-desc p, .engo-desc li, .engo-desc td, .engo-desc th { font-size: 16px !important; line-height: 1.7; }\n  .engo-desc h2 { font-size: 22px !important; font-weight: 700; color: #1a1a1a; border-bottom: 2px solid #1a1a1a; padding-bottom: 6px; margin: 2rem 0 1rem; line-height: 1.3; }\n  .engo-desc h3 { font-size: 17px !important; font-weight: 700; color: #1a1a1a; margin: 1.2rem 0 0.4rem; line-height: 1.4; }\n  .engo-desc p { margin: 0 0 1rem; }\n  .engo-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .engo-desc ul li { margin-bottom: 0.5rem; }\n\n  .engo-intro-box { background: #f5f5f5; border-left: 4px solid #222; padding: 1.1rem 1.4rem; border-radius: 0 6px 6px 0; margin-bottom: 1.5rem; }\n  .engo-intro-box p { margin: 0 !important; }\n\n  .engo-badge { display: inline-block; background: #222; color: #fff; font-size: 13px !important; font-weight: 700; border-radius: 4px; padding: 2px 10px; margin-right: 6px; margin-bottom: 4px; vertical-align: middle; letter-spacing: 0.04em; }\n  .engo-badge.accent { background: #c05a00; }\n  .engo-badge.green { background: #2e7d32; }\n\n  .engo-why-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0.85rem; margin-bottom: 1.2rem; }\n  .engo-why-card { background: #f9f9f9; border: 1px solid #ddd; border-radius: 6px; padding: 1rem 1.1rem; line-height: 1.6; }\n  .engo-why-card strong { display: block; color: #1a1a1a; margin-bottom: 0.35rem; font-size: 16px !important; }\n\n  .engo-callout { background: #f0f8f0; border: 1px solid #a5d6a7; border-radius: 6px; padding: 1rem 1.3rem; margin: 1.2rem 0; }\n  .engo-callout h3 { margin-top: 0 !important; }\n  .engo-callout p { margin: 0 !important; }\n\n  .engo-callout-blue { background: #f0f4ff; border-left: 4px solid #1a1a1a; border-radius: 0 6px 6px 0; padding: 1rem 1.3rem; margin: 1.2rem 0; }\n  .engo-callout-blue p { margin: 0 !important; }\n\n  .engo-callout-warn { background: #fff8e6; border: 1px solid #f0d080; border-radius: 6px; padding: 1rem 1.2rem; margin: 1.2rem 0; color: #5a4a00; }\n  .engo-callout-warn p { margin: 0 !important; }\n\n  .engo-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; }\n  .engo-spec-table th { background: #222; color: #fff !important; text-align: left; padding: 0.7rem 1rem; font-weight: 600; font-size: 16px !important; }\n  .engo-spec-table td { padding: 0.6rem 1rem; border-bottom: 1px solid #e0e0e0; vertical-align: top; font-size: 16px !important; }\n  .engo-spec-table tr:nth-child(even) td { background: #f5f5f5; }\n  .engo-spec-table td:first-child { font-weight: 600; color: #1a1a1a; width: 42%; }\n\n  .engo-pills { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-bottom: 1.2rem; }\n  .engo-pill { background: #f0f0f0; color: #1a1a1a; border-radius: 20px; padding: 0.35rem 1rem; font-size: 15px !important; font-weight: 500; border: 1px solid #ccc; line-height: 1.4; }\n\n  .engo-faq-item { border-bottom: 1px solid #e0e0e0; padding: 1rem 0; }\n  .engo-faq-item:last-child { border-bottom: none; }\n  .engo-faq-item p { margin: 0.4rem 0 0 !important; }\n\n  .engo-inbox-list { list-style: none !important; padding: 0 !important; margin: 0 0 1rem !important; }\n  .engo-inbox-list li { padding: 0.5rem 0 0.5rem 1.8rem !important; border-bottom: 1px solid #ebebeb; position: relative; margin-bottom: 0 !important; font-size: 16px !important; }\n  .engo-inbox-list li::before { content: \"✓\"; position: absolute; left: 0; color: #2e7d32; font-weight: 700; }\n\n  .engo-infobox { background: #fff8e6; border: 1px solid #f0d080; border-radius: 6px; padding: 1rem 1.2rem; margin-top: 1.5rem; color: #5a4a00; line-height: 1.6; font-size: 16px !important; }\n\n  @media (max-width: 600px) {\n    .engo-why-grid { grid-template-columns: 1fr; }\n    .engo-spec-table td:first-child { width: auto; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"engo-desc\"\u003e\n\n\u003cdiv class=\"engo-intro-box\"\u003e\n  \u003cp\u003e\u003cstrong\u003eThe ENGO ETR-868 is a wireless relay kit that solves the problem of missing or impractical cable runs in heating installations.\u003c\/strong\u003e Operating on 868 MHz, it links a 230V transmitter to a mains receiver (up to 300 m in open space) with a 16A volt-free relay output. Factory-paired and ready to use, it eliminates the need to route extra cable between a thermostat, wiring centre, pump, boiler, or control box — making it invaluable for retrofits, extensions, and complex layouts.\u003c\/p\u003e\n  \u003cdiv class=\"engo-badges\"\u003e\n    \u003cspan class=\"engo-badge\"\u003e868 MHz Wireless\u003c\/span\u003e\n    \u003cspan class=\"engo-badge\"\u003e300 m Range\u003c\/span\u003e\n    \u003cspan class=\"engo-badge\"\u003e16A Relay Output\u003c\/span\u003e\n    \u003cspan class=\"engo-badge\"\u003eVolt-Free COM\/NO\u003c\/span\u003e\n    \u003cspan class=\"engo-badge\"\u003eDIN Rail or Flush Box\u003c\/span\u003e\n    \u003cspan class=\"engo-badge\"\u003eFactory Pre-Paired\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eWhy Choose the ETR-868?\u003c\/h2\u003e\n\u003cdiv class=\"engo-why-grid\"\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e📡 \u003cstrong\u003e300 m Open-Space Range\u003c\/strong\u003e\u003cp\u003eEasily bridges the gap between a manifold, boiler, or pump even through floors and walls in large properties.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e⚡ \u003cstrong\u003e16A Load Capacity\u003c\/strong\u003e\u003cp\u003eControls pumps, boilers, fan coils, lighting circuits, electric heaters, gates, and other 230V loads up to 16A.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e🔗 \u003cstrong\u003eVolt-Free COM\/NO Output\u003c\/strong\u003e\u003cp\u003eClean contact relay output — safe for both low-voltage and mains control inputs on any device.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e🔧 \u003cstrong\u003eFlush Box or DIN Rail\u003c\/strong\u003e\u003cp\u003eReceiver and transmitter both fit in standard 47 mm flush-mount back boxes or snap onto DIN rail.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e✅ \u003cstrong\u003eFactory Pre-Paired\u003c\/strong\u003e\u003cp\u003eBoth units arrive ready to use — no pairing procedure required for single-receiver setups.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e🔋 \u003cstrong\u003eSuper-Capacitor Backup\u003c\/strong\u003e\u003cp\u003eBuilt-in capacitor in the transmitter sends an \"OFF\" command to the receiver if mains power is lost — no stuck-on relay.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e➕ \u003cstrong\u003eMultiple Receivers\u003c\/strong\u003e\u003cp\u003ePair additional ETR-868RX receivers to a single transmitter for multi-point control from one signal source.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"engo-why-card\"\u003e🏗️ \u003cstrong\u003eRetrofit Solution\u003c\/strong\u003e\u003cp\u003eThe perfect answer when wiring is not possible — no chasing, no cable, no disruption to finished rooms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eSuitable For\u003c\/h2\u003e\n\u003cdiv class=\"engo-pills\"\u003e\n  \u003cspan class=\"engo-pill\"\u003eCirculation Pump Control\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eBoiler ON\/OFF Control\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eUFH Wiring Centre to Boiler\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eMissing Thermostat Cable\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eLighting Control\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eFan Control\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eElectric Heater Control\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eGate \/ Access Control\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eManifold to Boiler Link\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eRetrofit Installations\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003eExtension \/ Loft Conversions\u003c\/span\u003e\n  \u003cspan class=\"engo-pill\"\u003ePlant Room to Remote Device\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eAbout the ETR-868\u003c\/h2\u003e\n\u003cp\u003eThe ETR-868 is a two-part 868 MHz wireless relay system. The transmitter connects to a 230V AC signal source (such as the thermostat output of a wiring centre, a zone valve output, or a light switch output). When the transmitter is powered, it continuously sends a coded signal to the receiver. The receiver activates its 16A volt-free COM\/NO relay, supplying or switching the connected load. When the transmitter loses power (zone off, boiler signal off, switch turned off), it uses its built-in super-capacitor to transmit a final \"OFF\" command, ensuring the receiver returns to its open state immediately.\u003c\/p\u003e\n\n\u003cdiv class=\"engo-callout-blue\"\u003e\n  \u003cstrong\u003e🔌 Typical Use Cases\u003c\/strong\u003e\u003cbr\u003e\n  \u003cstrong\u003eMissing wiring between thermostat and wiring centre:\u003c\/strong\u003e Mount the transmitter at the thermostat's location (wired to the thermostat's SL output) and the receiver at the wiring centre (connected to the SL zone input) — no cable run needed between the two.\u003cbr\u003e\u003cbr\u003e\n  \u003cstrong\u003eWiring centre to boiler:\u003c\/strong\u003e Mount the transmitter at the wiring centre (wired to the pump or boiler output) and the receiver at the boiler (connected to the thermostat input) — eliminates a long cable run to a remote boiler.\u003cbr\u003e\u003cbr\u003e\n  \u003cstrong\u003eWireless pump switch via light switch:\u003c\/strong\u003e Transmitter wired to a lighting circuit; receiver controls the circulation pump — turning the light on activates the pump.\n\u003c\/div\u003e\n\n\u003cdiv class=\"callout-orange\"\u003e\n  \u003cstrong\u003e⚠️ Signal Repeat Cycles\u003c\/strong\u003e\u003cbr\u003e\n  The transmitter continuously repeats its signal while powered. If the receiver loses the signal for any reason (e.g. severe interference), it will return to its OFF (open) state — a fail-safe design that prevents devices from being left running indefinitely.\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e868 MHz radio communication — up to 300 m open-space range\u003c\/li\u003e\n  \u003cli\u003eTransmitter: 230V AC powered — activates relay when supplied\u003c\/li\u003e\n  \u003cli\u003eReceiver: 230V AC powered — volt-free COM\/NO relay output, 16A max load\u003c\/li\u003e\n  \u003cli\u003eSuper-capacitor in transmitter sends \"OFF\" on power loss\u003c\/li\u003e\n  \u003cli\u003eUnique transmission codes — prevents cross-interference with other devices\u003c\/li\u003e\n  \u003cli\u003eFactory pre-paired transmitter and receiver\u003c\/li\u003e\n  \u003cli\u003eAdditional receivers (ETR-868RX) can be paired with the same transmitter\u003c\/li\u003e\n  \u003cli\u003eReceiver and transmitter both fit in flush-mount back box (47 mm depth)\u003c\/li\u003e\n  \u003cli\u003eDIN rail mounting brackets included for panel installation\u003c\/li\u003e\n  \u003cli\u003eLED status indicator on both units\u003c\/li\u003e\n  \u003cli\u003eExternal \"NO contact\" input on transmitter for monostable switch override\u003c\/li\u003e\n  \u003cli\u003e2014\/30\/EU, 2014\/35\/EU, 2014\/53\/EU, 2011\/65\/EU compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"engo-spec-table\"\u003e\n  \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eTransmitter (TX)\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e230V AC \/ 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eRF Frequency\u003c\/td\u003e\n\u003ctd\u003e868 MHz (868.0–868.6 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003eUp to 300 m (open space)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBackup\u003c\/td\u003e\n\u003ctd\u003eSuper-capacitor — sends OFF on power loss\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDimensions (TX)\u003c\/td\u003e\n\u003ctd\u003e46 × 46 × 24 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eReceiver (RX)\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e230V AC \/ 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eVolt-free COM\/NO relay\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMax Load\u003c\/td\u003e\n\u003ctd\u003e16(5)A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFlush box (47 mm) or DIN rail (bracket included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDimensions (RX)\u003c\/td\u003e\n\u003ctd\u003e46 × 46 × 24 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eInstallation must be carried out by a qualified person per BS 7671. Both transmitter and receiver require 230V AC connections.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTransmitter: connect L and N from the source signal (e.g. zone output on wiring centre, pump output, or switched live)\u003c\/li\u003e\n  \u003cli\u003eReceiver: connect L and N to 230V supply; wire the COM\/NO output to the controlled device's input\u003c\/li\u003e\n  \u003cli\u003eBoth units arrive pre-paired — no pairing required for a single-receiver setup\u003c\/li\u003e\n  \u003cli\u003eTo pair additional ETR-868RX receivers: hold the button on the receiver for 5 seconds to enter pairing mode while the transmitter is running\u003c\/li\u003e\n  \u003cli\u003eMount away from metal enclosures where possible to maximise RF range\u003c\/li\u003e\n  \u003cli\u003eDIN rail brackets are included — use for panel or consumer unit installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eWhat is the maximum cable-saving distance?\u003c\/h3\u003e\n    \u003cp\u003eUp to 300 m in open space. In practice, through 2–3 floors and partition walls in a domestic property, reliable operation is typical up to 50–80 m. For very large or heavily shielded buildings, use an ETR-868RX repeater receiver closer to the transmitter to relay the signal further.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eCan I control more than one device from a single transmitter?\u003c\/h3\u003e\n    \u003cp\u003eYes — pair additional ETR-868RX receivers to the same transmitter. All paired receivers will activate and deactivate simultaneously when the transmitter is powered on and off.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eWhat happens if the signal is interrupted?\u003c\/h3\u003e\n    \u003cp\u003eThe receiver returns to its OFF (relay open) state within seconds of losing the RF signal — a fail-safe behaviour that prevents controlled devices from remaining powered on indefinitely.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eCan this replace the missing wire between my thermostat and wiring centre?\u003c\/h3\u003e\n    \u003cp\u003eYes — wire the transmitter to the thermostat's SL (switched live) output, and connect the receiver's COM\/NO output to the corresponding SL zone input on the wiring centre. This exactly replicates what a direct cable would do.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eDoes this work with non-ENGO equipment?\u003c\/h3\u003e\n    \u003cp\u003eYes — the ETR-868 uses standard 230V inputs and volt-free COM\/NO outputs that are compatible with any manufacturer's heating controls, pumps, boilers, or lighting systems.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× ETR-868 transmitter (TX)\u003c\/li\u003e\n  \u003cli\u003e1× ETR-868 receiver (RX)\u003c\/li\u003e\n  \u003cli\u003eDIN rail mounting brackets\u003c\/li\u003e\n  \u003cli\u003eQuick installation guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: For additional receiver units, order the ETR-868RX separately.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin-top:24px; color:#666;\"\u003eInstallation by qualified person per BS 7671. Both units require 230V AC. Max load 16A. For additional relay receivers see \u003cstrong\u003eETR-868RX\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"ENGO Controls","offers":[{"title":"Default Title","offer_id":63496013676893,"sku":"ETR-868","price":59.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/ETR-868-RX.webp?v=1771495502","url":"https:\/\/qualityheating.co.uk\/products\/engo-etr-868-wireless-relay-controller-868mhz-230v-no-wire-zone-control-for-pumps-boilers-lighting","provider":"AIZO Quality Heating","version":"1.0","type":"link"}