{"product_id":"resol-deltasol-bs4-pump-station-1-2-sensors","title":"RESOL DeltaSol BS\/4 Pump Station (1-2 Sensors) — Replaced by RESOL DeltaSol SLL Controller","description":"\u003cp\u003eThe RESOL DeltaSol BS\/4 pump station (1-2 sensors) is no longer available. The RESOL DeltaSol® SLL Controller is the current direct replacement.\u003c\/p\u003e\n\u003cp\u003eThe DeltaSol SLL is the successor to the BS\/4 and is compatible with the same open loop solar hot water systems. It is a 1-2 sensor controller suitable for standard flat plate and evacuated tube solar hot water systems.\u003c\/p\u003e\n\u003cp\u003eSensors must always be replaced at the same time as the controller — reusing existing sensors with a new controller voids warranty.\u003c\/p\u003e\n\u003cp\u003eSuits a wide range of Australian solar hot water systems including Rheem, Dux, Hills, Rinnai, Chromagen, Apricus, Bradford Solar, Solahart, Conergy, Thermann, StratCo and more.\u003c\/p\u003e\n\u003cp data-end=\"1799\" data-start=\"1619\"\u003e\u003cstrong\u003eThis is a complete solar hot water pump station replacement, not just a controller or pump.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2095\" data-start=\"1890\"\u003eIf your solar hot water system is not working correctly, the pump station or controller is often the cause. This unit restores reliable circulation and temperature control for efficient system performance.\u003c\/p\u003e\n\u003cp data-end=\"2095\" data-start=\"1890\"\u003eCOMPLETE SYSTEM SOLUTION\u003c\/p\u003e\n\u003ch3 data-end=\"1038\" data-start=\"1001\" data-section-id=\"1nis76b\"\u003e✔ What this pump station includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1110\" data-start=\"1040\" data-section-id=\"w7bc2k\"\u003eGrundfos circulation pump (high-quality, reliable performance)\u003c\/li\u003e\n\u003cli data-end=\"1147\" data-start=\"1111\" data-section-id=\"1m88hux\"\u003eResol DeltaSol BS\/4 1-2 Sensors Controller\u003c\/li\u003e\n\u003cli data-end=\"1180\" data-start=\"1148\" data-section-id=\"z2j34s\"\u003e1 x 20m roof sensor, 1 x 2.5m tank sensor  \u003c\/li\u003e\n\u003cli data-end=\"1226\" data-start=\"1181\" data-section-id=\"19m98ht\"\u003eThermal paste for sensor installation\u003c\/li\u003e\n\u003cli\u003eAVG or AW pumps unions (subject to availability)\u003c\/li\u003e\n\u003cli\u003eAVG or AW solar rated non return valve (subject to availability)\u003c\/li\u003e\n\u003cli\u003eAVG or AW Flow meter\u003c\/li\u003e\n\u003cli\u003eQuality pump station cover that can be fitted to a wall or it is moulded to fit onto the side of your tank\u003c\/li\u003e\n\u003cli\u003ePre-wired components for easier setup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll components are matched to work together, reducing installation time and improving reliability.\u003c\/p\u003e\n\u003ch3 data-end=\"2622\" data-start=\"2570\" data-section-id=\"1mxdb0\"\u003e✔ Common signs your pump station needs replacing\u003c\/h3\u003e\n\u003cul data-end=\"2774\" data-start=\"2623\"\u003e\n\u003cli data-end=\"2655\" data-start=\"2623\" data-section-id=\"ag3cx4\"\u003eNo hot water or poor heating\u003c\/li\u003e\n\u003cli data-end=\"2676\" data-start=\"2656\" data-section-id=\"1f6tpb6\"\u003ePump not running\u003c\/li\u003e\n\u003cli data-end=\"2703\" data-start=\"2677\" data-section-id=\"ikohfz\"\u003eSystem not circulating\u003c\/li\u003e\n\u003cli data-end=\"2733\" data-start=\"2704\" data-section-id=\"1boilio\"\u003eController not responding\u003c\/li\u003e\n\u003cli data-end=\"2774\" data-start=\"2734\" data-section-id=\"1yg235o\"\u003eIntermittent or unreliable operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"2962\" data-start=\"2930\" data-section-id=\"3dvni5\"\u003e✔ About the Resol controller\u003c\/h3\u003e\n\u003cblockquote data-end=\"3247\" data-start=\"2964\"\u003e\n\u003cp data-end=\"3095\" data-start=\"2966\"\u003eResol controllers are widely used in solar hot water systems and are known for their reliability and advanced control features.\u003c\/p\u003e\n\u003cp data-end=\"3247\" data-start=\"3102\"\u003eThe DeltaSol range offers flexible system configurations, multiple sensor inputs, and precise control of circulation for efficient heat transfer.\u003c\/p\u003e\n\u003cp data-end=\"3247\" data-start=\"3102\"\u003eThis allows more precise system control and improved heat transfer compared to standard controllers.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch3 data-end=\"3745\" data-start=\"3705\" data-section-id=\"101djqh\"\u003e✔ When this pump station is suitable\u003c\/h3\u003e\n\u003cul data-end=\"3850\" data-start=\"3746\"\u003e\n\u003cli data-end=\"3784\" data-start=\"3746\" data-section-id=\"1kfc7r3\"\u003eReplacing an existing pump station\u003c\/li\u003e\n\u003cli data-end=\"3815\" data-start=\"3785\" data-section-id=\"flhk9d\"\u003ePump or controller failure\u003c\/li\u003e\n\u003cli data-end=\"3850\" data-start=\"3816\" data-section-id=\"ttrfmd\"\u003eSystems requiring full upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIdeal for replacing older or faulty pump stations in residential solar hot water systems with improved efficiency.\u003c\/p\u003e\n\u003ch3 data-end=\"3890\" data-start=\"3857\" data-section-id=\"uubjxp\"\u003e✔ When it may NOT be suitable\u003c\/h3\u003e\n\u003cul data-end=\"3995\" data-start=\"3891\"\u003e\n\u003cli data-end=\"3940\" data-start=\"3891\" data-section-id=\"fs8hf1\"\u003eSystems requiring controller-only replacement\u003c\/li\u003e\n\u003cli data-end=\"3962\" data-start=\"3941\" data-section-id=\"aqzoce\"\u003eHeat pump systems\u003c\/li\u003e\n\u003cli data-end=\"3995\" data-start=\"3963\" data-section-id=\"17idtgq\"\u003eElectric booster-only issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis allows better system performance, improved heat transfer, and reduced reliance on electric boosting.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e✔ Controller Options: Aestiva vs Resol vs Senztek\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWe offer this pump station with different controller options depending on your system requirements:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"true\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAestiva:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e modern differential controller with smart heat management features, including overheating and stagnation protection. Ideal for users wanting advanced protection and efficient system performance.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eResol:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e highly configurable controller suited to a wide range of system layouts, with flexible programming and multiple sensor inputs. Best for more complex or customised systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSenztek:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e simple, reliable and widely used replacement controllers. Ideal for straightforward system repairs and standard solar hot water setups.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eIf you are unsure which controller is best for your system, contact us and we can help you choose the correct option.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"tab1\"\u003e\u003cstrong\u003eThe RESOL DeltaSol\u003csup\u003e®\u003c\/sup\u003e SLL controller is the replacement controller for the Resol DeltaSol BS\/4, BS\/2, BS Plus, AX and AL controllers.**\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"tab1\"\u003e\n\u003cspan\u003eThe DeltaSol\u003c\/span\u003e\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e SLL is the smallest controller of the SL series. Its equipment is optimised for small and medium-sized solar thermal and heating systems, 10 pre-configured basic systems are available. The DeltaSol\u003c\/span\u003e\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e SLL is also the first controller of its category to offer the automatic function control according to the VDI 2169 directive. Additionally, it is equipped with a potential-free extra-low voltage relay for backup heating demand and a V40 flowmeter input for heat quantity measurement.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tab1\"\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tab1\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"tab1\"\u003e\n\u003cul class=\"fa-ul\"\u003e\n\u003cli\u003eMicrobuttons for quick access to the manual mode and the holiday function\u003c\/li\u003e\n\u003cli\u003e3 relay outputs (incl. 1 potential-free extra-low voltage relay)\u003c\/li\u003e\n\u003cli\u003e4 inputs for Pt1000, Pt500 or KTY temperature sensors\u003c\/li\u003e\n\u003cli\u003e1 V40 impulse input\u003c\/li\u003e\n\u003cli\u003e2 PWM outputs for the speed control of high-efficiency pumps\u003c\/li\u003e\n\u003cli\u003e10 basic system layouts to choose from\u003c\/li\u003e\n\u003cli\u003eAutomatic function control according to VDI 2169\u003c\/li\u003e\n\u003cli\u003eHeat pump demand (optional)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/storage.googleapis.com\/product-description-images\/pump%20station.gif\"\u003e \u003c\/p\u003e","brand":"Solar Hot Water Parts","offers":[{"title":"Default Title","offer_id":39472457580695,"sku":"SHWP0013","price":730.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0534\/5017\/8711\/products\/Resol_Deltasol_BS4_Solar_Hot_Water_Pump_Station_large-1_ecf7cdef-a6ee-4e3d-a008-18d69319cfaf.gif?v=1629162654","url":"https:\/\/solarhotwaterparts.com.au\/products\/resol-deltasol-bs4-pump-station-1-2-sensors","provider":"Solar Hot Water Parts","version":"1.0","type":"link"}