Image - 2026-09-06 09:21

Technical engineering schematic (blueprint-style clean line drawing) of a hydronic heating system with primary-secondary loop hydraulic decoupling. Black clean vector lines on a pure white background. ONLY the flow arrows are colored: supply flow arrows RED, return flow arrows BLUE. Everything else strictly black-and-white. LAYOUT AND COMPONENTS: TWO BOILERS on the left, connected in PARALLEL to the primary loop supply and return mains: a GAS BOILER (rectangle with a burner symbol / flame at the bottom, labeled "ГАЗОВЫЙ КОТЁЛ") and an ELECTRIC BOILER (rectangle with a heating-element symbol, labeled "ЭЛЕКТРИЧЕСКИЙ КОТЁЛ"). Both boilers feed the same supply main and return main. PRIMARY LOOP ("ПЕРВИЧНОЕ КОЛЬЦО") drawn as a horizontal closed rectangular loop running across the drawing. Label it clearly. Two CLOSELY-SPACED TEES on the primary loop, drawn close together: T1 on the supply pipe (labeled "Т1 – ПОДАЧА") and T2 on the return pipe (labeled "Т2 – ОБРАТКА"). From this pair of close tees branch FOUR secondary circuits. FOUR SECONDARY CIRCUITS branching from T1 (supply) and T2 (return), each with its OWN circulation pump and a clear label: 1. INDIRECT WATER HEATER — a vertical cylinder tank with an internal coil/serpentine heat exchanger, labeled "БКН" (boiler indirect). Its own pump. 2. RADIATOR BRANCH #1 — four radiators in series/parallel, each radiator drawn as a rectangle with vertical fins/ribs. Label "РАДИАТОРНАЯ ВЕТКА 1 (4 радиатора)". Its own pump. 3. RADIATOR BRANCH #2 — four more finned radiators. Label "РАДИАТОРНАЯ ВЕТКА 2 (4 радиатора)". Its own pump. 4. UNDERFLOOR HEATING — a manifold/collector with 7 loops (7 parallel serpentine floor loops) plus a mixing unit (three-way mixing valve symbol), labeled "ТЁПЛЫЙ ПОЛ · КОЛЛЕКТОР 7 ПЕТЕЛЬ · СМЕСИТЕЛЬНЫЙ УЗЕЛ". Its own pump. STANDARD SYMBOLS: pump = a CIRCLE with a TRIANGLE inside (each pump labeled "НАСОС"); boiler = rectangle with burner/flame symbol; radiator = rectangle with vertical fins. FLOW ARROWS: red arrows on all SUPPLY lines and blue arrows on all RETURN lines indicating direction of flow through the primary loop and into/out of each secondary circuit. Style: precise technical drafting / engineering diagram, thin uniform black lines, neat right-angle piping, clean sans-serif Russian labels for every element, schematic symbols, no shading, no gradients, no photorealism. White background.