This Unit is Available for Back-Order Only. Drain Back Solar Hot Water Pump Station.With High Efficiency Pump & Solar Controller. The unit with 1 (180 mm) solar circulating pump, fully assembled and tested, consists of. Flowmeter with flow regulation with filling and draining valves. Synchronous solar high efficiency circulating pump Wilo Yonos Para ST 25/7.5 PWM. Flanged 3-way ball valve with side 3rd port capped (can be used for additional connections), supplied with in-handle thermometer (coded blue, range 0°-120°C). Ball valve with compression fittings, supplied with in-handle thermometer (coded red, range 0°-120°C).
Pre-wired Sorel MTDC solar controller including 3 of PT1000 silicone cable sensors, controller power cable with Schuko plug, power cable and PWM control cable for the circulating pump. EPP insulation box (Measurements: 308x434x169 mm).
A special back plate fixes the unit to the insulation box and it allows a quick fitting to the wall or to the solar cylinder. Constant temperature 120°C; (short time temperature: 160°C for 20 s). High Efficiency: Wilo Yonos Para ST with a permanent magnet motor. The pump uses synchronized electronic communication and it saves on power consumption by matching the output of the pump with the needs of the solar circuit. Thanks to the high head produced by the Yonos Para ST 15/13, just a single circulating pump is enough to carry out the functions of filling the circuit and flowing the fluid through the solar panels.
The controller fills the system quickly by exploiting the pump's high head and the circuit's low flow rates. In cases where an initial high head is not required but the overall system requires the head also at higher flow rates then it is recommended to use the Yonos Para ST 25/7.5 pump instead. It is important that the size of pump is accurately assessed in combination with the overall solar thermal system. The peculiarity of a drain-back solar system is that it automatically drains the heat transfer fluid from the panels when the controller stops the circulating pump from operating because the working condition do not exist.
In this situation, all the fluid in the circuit drains back into the drain-back tank as a result of gravity. As a result of this it is possible to use pure water, without anti-freeze, as the heat transfer fluid. Furthermore, because all the fluid drains out of the panels, this system avoids panel stagnation and overheating once the target temperature in the solar tank has been achieved.
This operating feature makes it possible to combine equipment simplicity with the advantages of a forced system that is regulated by a controller. No use of chemical substances in water. Saving of some parts of the system. Intrinsic safety in case of black out. The item "Drain Back Solar Hot Water Station Built-in Controller & High Efficiency Pump" is in sale since Thursday, February 15, 2018.
This item is in the category "Home Appliances\Heating, Cooling & Air\Water Heaters\Standard Water Heaters". The seller is "eurocomfort" and is located in Auckland. This item can be shipped worldwide.