Solar Panel Antifreeze Valve

The purge valve provides a path.

Solar panel antifreeze valve.

Do we really need this anti freeze valve. Using an antifreeze solution. Location of the valve may vary depending on the system design and piping. It is important to refer to the solar water heater manufacturer s installation instructions in conjunction with the following instructions.

Robertshaw fp 45 thermostatic antifreeze valve the robertshaw fp 45 antifreeze valve uses a reliable self contained power element that is sensitive to temperature and operates without electrical power or sensors. How do i know this. The photovoltaic solar panels or pv solar panels convert the sun s energy into electricity which then can be used to heat water. Solar panels can also directly heat water by heating water filled pipes within the solar panels or by heating a transfer fluid such as antifreeze usually propylene glycol.

Solar water heating systems that use an antifreeze solution propylene glycol or ethylene glycol as a heat transfer fluid have effective freeze protection as long as the proper antifreeze concentration is maintained. Antifreeze fluids degrade over time and normally should be changed every 3 5 years. So what to do i. Because nobody is silly enough to make their solar setup 3x bigger th.

The robertshaw fp 45 antifreeze valve uses a reliable self contained power element that is sensitive to temperature and operates without electrical power or sensors. The valve should be located in a position to allow good water distribution through the solar panel so that when the valve opens water fl ows as evenly as possibe through all the collector tubes. In solar applications the gate of the valve typically opens as temperatures decrease allowing the liquid to spill and to be replaced by warmer water when the water is near the. In solar applications the gate of the valve typically opens as temperatures decrease allowing the liquid to spill and to be replaced by warmer water when the water is near.

Install a fill and purge valve assembly typically near the main solar glycol circulator pump and often low in the solar plumbing loop. I have one of the largest residential solar hot water setups in ct. Make sure the fill valve feeds the bottom of the solar collectors so that liquid entering the fill valve will push any air in the system up to the top of the solar plumbing loop. If you live in south florida or anywhere that doesn t have freezing conditions the answer is no.