{"id":9173,"date":"2026-08-31T14:56:26","date_gmt":"2026-08-31T11:56:26","guid":{"rendered":"https:\/\/alphatech.com.gr\/?p=9173"},"modified":"2026-08-31T14:57:26","modified_gmt":"2026-08-31T11:57:26","slug":"syndesi-antlias-thermotitas-me-iliako-thermosifona","status":"publish","type":"post","link":"https:\/\/alphatech.com.gr\/en\/syndesi-antlias-thermotitas-me-iliako-thermosifona\/","title":{"rendered":"Connecting a Heat Pump to a Solar Water Heater"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"9173\" class=\"elementor elementor-9173\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e31a91d e-flex e-con-boxed e-con e-parent\" data-id=\"e31a91d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d670d94 elementor-widget elementor-widget-heading\" data-id=\"d670d94\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Correct Application, Common Problems &amp; Solutions<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4cb1180 elementor-widget elementor-widget-text-editor\" data-id=\"4cb1180\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Greece has one of the highest rates of solar water heater penetration in Europe and enjoys a level of sunshine that most countries would envy. It is therefore no coincidence that the most common combination an installer is called upon to manage today is a <strong>\u03b1<span style=\"color: #000080;\">heat pump with an existing or new solar water heater<\/span><\/strong><span style=\"color: #000080;\">.<\/span> In theory, it sounds ideal: free solar energy reduces the load on the DHW system and increases the system\u2019s actual efficiency. In practice, however, it is the details that make all the difference to a job well done.<\/p><p>In this guide from Alphatech\u2019s technical department, we analyse the correct connection methods, the problems we have encountered, as well as practical solutions that ensure reliable operation, hot water and a trouble-free installation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b45e4c8 elementor-widget elementor-widget-heading\" data-id=\"b45e4c8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Does it actually make sense to combine a heat pump with a solar water heater?;<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7ceec5f elementor-widget elementor-widget-text-editor\" data-id=\"7ceec5f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Let\u2019s think about it logically. A solar water heater produces hot water at zero energy cost for most of the year. When there is insufficient sunlight \u2013 whether due to cloud cover or because it is winter \u2013 or during periods of increased evening demand, the heat pump takes over to <span style=\"color: #000080;\"><strong>upload or complete<\/strong> <\/span>the water temperature. The aim is for the pump to operate <span style=\"color: #000080;\"><strong>as little as possible<\/strong> <\/span>and always on a preheated base, so that the plant\u2019s actual efficiency remains high.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-93e26fb elementor-widget elementor-widget-heading\" data-id=\"93e26fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The most common ways to connect<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d07b3ee elementor-widget elementor-widget-text-editor\" data-id=\"d07b3ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>There are various ways of connecting a heat pump to a solar system, and they can all work properly, provided they are installed correctly<span style=\"color: #000080;\"><strong> their connection and installation<\/strong>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-745260c elementor-widget elementor-widget-heading\" data-id=\"745260c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Triple-energy boiler room boiler (the cleanest solution)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c40a64a elementor-widget elementor-widget-text-editor\" data-id=\"c40a64a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The ideal scenario for a new installation is a DHW tank in the boiler room with <span style=\"color: #000080;\"><strong>two heat exchangers (coils)<\/strong>.<\/span> The lower (small) coil is supplied by the solar collectors via a circulator and a differential controller, the upper (large) coil by the heat pump, and there is also a heating element for emergency use. The principle behind stratification is natural: the sun preheats the entire volume from below, whilst the heat pump maintains the temperature only when necessary.<\/p><ul><li><span style=\"color: #000080;\"><strong>Advantage: <\/strong><\/span>Clear separation of heat sources, maximum use of solar energy; the pump operates only as a backup.<\/li><li><span style=\"color: #000080;\"><strong>What you need to bear in mind: <\/strong><\/span><span style=\"font-size: 16px;\">correct positioning of the temperature sensors (below the solar collector, above the heat pump), heat pump coil of at least <\/span><span style=\"color: #000080;\"><strong style=\"font-size: 16px;\">1,9<\/strong><strong style=\"font-size: 16px;\">m<sup>2<\/sup><\/strong><\/span><span style=\"font-size: 16px;\"> and a container capacity sufficient to meet demand.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" class=\"e-image-base\" data-interaction-id=\"0f8a4e4\" data-e-type=\"widget\" data-id=\"0f8a4e4\" id=\"9180\" src=\"https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039a\u03ac\u03b8\u03b5\u03c4\u03b7-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2.png\" width=\"800\" height=\"600\" srcset=\"https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039a\u03ac\u03b8\u03b5\u03c4\u03b7-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2.png 800w, https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039a\u03ac\u03b8\u03b5\u03c4\u03b7-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2-300x225.png 300w, https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039a\u03ac\u03b8\u03b5\u03c4\u03b7-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2-768x576.png 768w, https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039a\u03ac\u03b8\u03b5\u03c4\u03b7-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2-16x12.png 16w\" alt=\"\u0394\u03b9\u03b1\u03c4\u03bf\u03bc\u03ae \u03b8\u03b5\u03c1\u03bc\u03b1\u03bd\u03c4\u03ae\u03c1\u03b1 \u03bd\u03b5\u03c1\u03bf\u03cd \u03bc\u03b5 \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03b1\u03c3\u03b7, \u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03c4\u03ac\u03c4\u03b7, \u03b1\u03b9\u03c3\u03b8\u03b7\u03c4\u03ae\u03c1\u03b1 \u03b8\u03b5\u03c1\u03bc\u03bf\u03ba\u03c1\u03b1\u03c3\u03af\u03b1\u03c2, \u03c3\u03c0\u03b5\u03af\u03c1\u03b5\u03c2 \u03b8\u03ad\u03c1\u03bc\u03b1\u03bd\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae\/\u03ad\u03be\u03bf\u03b4\u03bf \u03b6\u03b5\u03c3\u03c4\u03bf\u03cd \u03bd\u03b5\u03c1\u03bf\u03cd (\u03b2\u03b1\u03bb\u03b2\u03af\u03b4\u03b1 \u03b1\u03c3\u03c6\u03b1\u03bb\u03b5\u03af\u03b1\u03c2).\"\/>\t\t\t\t<div class=\"elementor-element elementor-element-2991e2b elementor-widget elementor-widget-heading\" data-id=\"2991e2b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Triple-energy roof-mounted boiler (the most common installation)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36173ee elementor-widget elementor-widget-text-editor\" data-id=\"36173ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In most Greek homes, due to a lack of space and a dedicated boiler room, solar water heaters are installed on a flat roof or rooftop. This is similar to the previous system, but here the solar collector heats the DHW tank directly, with the pump operating as a backup via an internal heat exchanger (coil), whilst the heating element is again intended for emergency use only.<\/p><ul><li><span style=\"color: #000080;\"><strong>Advantage: <\/strong><\/span>Easy to install, maximises solar energy; the pump operates only as a backup.<\/li><li><span style=\"color: #000080;\"><strong>What you need to bear in mind: <\/strong><\/span>The correct positioning of the temperature sensors (in the middle for the pump, at the top for the booster) and the heat exchanger for the heat pump <span style=\"color: #000080;\">(at least <strong>1,9<\/strong><strong>m<sup>2<\/sup><\/strong>)<\/span> These are much more important here and require careful consideration. Furthermore, the long distances of the pipes from the pump to the solar water heater must be taken into account and factored in before the final installation.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<img decoding=\"async\" class=\"e-image-base\" data-interaction-id=\"1b6ecc7\" data-e-type=\"widget\" data-id=\"1b6ecc7\" id=\"9181\" src=\"https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039f\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2.png\" width=\"800\" height=\"600\" srcset=\"https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039f\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2.png 800w, https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039f\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2-300x225.png 300w, https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039f\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2-768x576.png 768w, https:\/\/alphatech.com.gr\/wp-content\/uploads\/2026\/07\/\u039f\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1-\u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03c3\u03b7-\u03bb\u03b7\u03b9\u03b1\u03ba\u03bf\u03cd-\u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03cd\u03c6\u03c9\u03bd\u03b1-\u03b3\u03b9\u03b1-\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7-\u03bc\u03b5-\u03b1\u03bd\u03c4\u03bb\u03af\u03b1-\u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2-16x12.png 16w\" alt=\"Cross-section of a water heater tank with a coiled heater, three sensor ports (red top thermostat, green sensor, blue mid sensor) inside a metal shell.\"\/>\t\t\t\t<div class=\"elementor-element elementor-element-20b4567 elementor-widget elementor-widget-heading\" data-id=\"20b4567\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Series connection with an existing solar water heater (the most complex installation)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d42a52 elementor-widget elementor-widget-text-editor\" data-id=\"4d42a52\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In many Greek homes where there is<span style=\"color: #000080;\"> <strong>already a solar water heater<\/strong>,<\/span> A heat pump is added. Here, the solar system should act as a preheating tank: the preheated water flows into a separate boiler tank connected to the heat pump, which, via the internal heat exchanger, simply raises it to the target temperature. Because the pump starts from a warm base, its energy consumption is significantly reduced.<\/p><ul><li><span style=\"color: #000080;\"><strong>Advantage: <\/strong><\/span>use of the old solar system and preheating of the DHW tank to minimise pump usage in summer and maximise its efficiency in winter<\/li><li><span style=\"color: #000080;\"><strong>What you need to bear in mind: <\/strong><\/span>The installation requires a qualified plumber, who will use all the necessary materials (e.g. solar bypass valve, expansion tank, sensors, etc.) and will pay particular attention to the correct layout for DHW stratification. The pump sensor must be positioned in the centre, and the boiler coil in the boiler room must be suitable for a heat pump (at least <span style=\"color: #000080;\"><strong>1,9<\/strong><strong>m<sup>2<\/sup><\/strong><\/span>).<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1071bdf elementor-widget elementor-widget-heading\" data-id=\"1071bdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What problems might you encounter and how to solve them<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-635f2b6 elementor-widget elementor-widget-heading\" data-id=\"635f2b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Problem 1: An unsuitable or undersized heat exchanger for a heat pump<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-179010b elementor-widget elementor-widget-text-editor\" data-id=\"179010b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A simple solar water heater does not have a second coil to which the pump can be connected. Attempts at a \u00abmakeshift\u00bb connection result in poor heat transfer and disappointing performance. Even in the case of triple-energy solar systems, the heat exchanger for the heat pump is small, resulting in flow errors or high compressor pressure errors!<\/p><p><span style=\"color: #000080;\"><strong>Solution: <\/strong><\/span>Selection of a dual\/triple-action tank with sufficient heat exchanger surface area (at least <span style=\"color: #000080;\"><strong>1,9<\/strong><strong>m<sup>2<\/sup><\/strong><\/span>) as per the design. Furthermore, the heat pump should be connected to the boiler using the largest possible pipe diameter (at least 1\u201d) and at a minimum distance of 3 metres, to ensure the highest possible flow rate!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-494b1b4 elementor-widget elementor-widget-heading\" data-id=\"494b1b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Problem 2: Incorrect positioning and adjustment of sensors<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4bb7e02 elementor-widget elementor-widget-text-editor\" data-id=\"4bb7e02\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>If the solar or pump sensor is fitted at the wrong height on the tank, the system will not work properly: it will either switch on the pump when solar heat is available, or leave the user without hot water.<\/p><p><span style=\"color: #000080;\"><strong>Solution: <\/strong><\/span>Follow the manufacturer\u2019s instructions regarding the position of each sensor per zone, as mentioned above. Separate sensors for the solar collector (bottom) and the pump (top). Verify the differential (\u0394\u03a4) start\/stop settings following installation in a solar system; careful, precise positioning of the pump sensor in a horizontal triple-energy boiler (in the middle and as centrally as possible within the tank).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0f0863c elementor-widget elementor-widget-heading\" data-id=\"0f0863c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Problem 3: Poor DHW temperature control<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eea93ce elementor-widget elementor-widget-text-editor\" data-id=\"eea93ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>During the summer months, the solar system can raise the temperature of the water in the tank well above the target temperature \u2013 even to 80\u201390 \u00b0C on sunny days. This creates two risks: the water becoming too hot and components suffering thermal stress. On the other hand, in winter the pump may operate at a relatively low setpoint to achieve a better COP, without reaching the desired domestic hot water temperature<\/p><p><span style=\"color: #000080;\"><strong>Solution: <\/strong><\/span>For the summer, a reduction in the temperature setpoint for the pump and mandatory installation <a href=\"https:\/\/alphatech.com.gr\/en\/solines-idrablika\/thermostatiki-valvida-anamixis-nerou-chrisis\/\">mixing valve <\/a>\u00a0at the DHW outlet. It maintains a safe temperature at the taps regardless of how hot the tank is. Furthermore, it allows the tank to store more energy. For the winter, increase the temperature setpoint on the pump and use the electric heating element periodically for optimum performance!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0dfe85f elementor-widget elementor-widget-heading\" data-id=\"0dfe85f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Problem 4: Reverse flow <\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b51ece4 elementor-widget elementor-widget-text-editor\" data-id=\"b51ece4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In natural circulation systems or where pipework is poorly routed, hot water may \u00abflow back\u00bb through the circuits at night, cooling the tank and negating the day\u2019s solar gain.<\/p><p><span style=\"color: #000080;\"><strong>Solution: <\/strong><\/span>Installation of non-return valves at the correct points and heat traps at the joints. Correct pipework slope and insulation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4087f8e elementor-widget elementor-widget-text-editor\" data-id=\"4087f8e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Proper installation starts with choosing the right equipment. The <a href=\"https:\/\/alphatech.com.gr\/en\/antlies-thermotitas\/\">Panasonic Aquarea heat pumps<\/a> The products we offer support all automation features for the flexible integration of solar systems and source priority logic \u2013 precisely the features that make all the difference in these installations.<\/p><p>At the same time, we support every installation with the right accessories: buffer tanks, solar thermostatic valves, circulation pumps and <a href=\"https:\/\/alphatech.com.gr\/en\/solines-ydravlika-exartimata\/\">plumbing fittings<\/a>. And, above all, with technical support backed by over 40 years\u2019 experience, both before and after the sale.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>\u03a3\u03c9\u03c3\u03c4\u03ae \u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae, \u03a3\u03c5\u03c7\u03bd\u03ac \u03a0\u03c1\u03bf\u03b2\u03bb\u03ae\u03bc\u03b1\u03c4\u03b1 &amp; \u039b\u03cd\u03c3\u03b5\u03b9\u03c2 \u0397 \u0395\u03bb\u03bb\u03ac\u03b4\u03b1 \u03ad\u03c7\u03b5\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c5\u03c8\u03b7\u03bb\u03cc\u03c4\u03b5\u03c1\u03b1 \u03c0\u03bf\u03c3\u03bf\u03c3\u03c4\u03ac \u03b4\u03b9\u03b5\u03af\u03c3\u03b4\u03c5\u03c3\u03b7\u03c2 \u03b7\u03bb\u03b9\u03b1\u03ba\u03ce\u03bd \u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03b9\u03c6\u03ce\u03bd\u03c9\u03bd \u03c3\u03c4\u03b7\u03bd \u0395\u03c5\u03c1\u03ce\u03c0\u03b7 \u03ba\u03b1\u03b9 \u03b7\u03bb\u03b9\u03bf\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03bf\u03b9 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03b5\u03c2 \u03c7\u03ce\u03c1\u03b5\u03c2 \u03b6\u03b7\u03bb\u03b5\u03cd\u03bf\u03c5\u03bd. \u0394\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03bb\u03bf\u03b9\u03c0\u03cc\u03bd \u03c4\u03c5\u03c7\u03b1\u03af\u03bf \u03cc\u03c4\u03b9 \u03bf \u03c0\u03b9\u03bf \u03c3\u03c5\u03c7\u03bd\u03cc\u03c2 \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03cc\u03c2 \u03c0\u03bf\u03c5 \u03ba\u03b1\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03bf \u03b5\u03b3\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c4\u03b7\u03c2 \u03c3\u03ae\u03bc\u03b5\u03c1\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03b1\u03bd\u03c4\u03bb\u03af\u03b1 \u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03bc\u03b5 \u03c0\u03c1\u03bf\u03cb\u03c0\u03ac\u03c1\u03c7\u03bf\u03bd\u03c4\u03b1 \u03ae \u03bd\u03ad\u03bf \u03b7\u03bb\u03b9\u03b1\u03ba\u03cc \u03b8\u03b5\u03c1\u03bc\u03bf\u03c3\u03af\u03c6\u03c9\u03bd\u03b1. \u03a3\u03c4\u03b7 \u03b8\u03b5\u03c9\u03c1\u03af\u03b1 \u03b1\u03ba\u03bf\u03cd\u03b3\u03b5\u03c4\u03b1\u03b9 \u03b9\u03b4\u03b1\u03bd\u03b9\u03ba\u03cc: [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":9243,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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