When commissioning a pressurized glycol solar hot water system it is essential that all the air in the solar loop is removed.
Glicol for solar panels.
Air in the loop can cause pump.
For solar thermal applications mixtures based on propylene glycol or the green glycol are recommended.
Dynalene solar glycol xt msds page 5 of 5 whitehall pa 18052 610 262 9686 date of printing.
This is obviously catastrophic for any solar thermal installation and must be avoided.
However no warranty is expressed or implied regarding the accuracy of these data or the results to be obtained from the use thereof.
Never use more than 60 glycol in the mix.
Always mix in as little glycol as possible to keep optimum efficiency but never risk burst pipes.
The process of filling the plumbing system with this antifreeze while purging all the air out must be done systematically and in the right order.
Sentinel r100 solar thermal fluid is glycol based and designed for use in solar heating equipment operating up to 200 c.
During static conditions the solar collectors should be completely empty so that the thermal fluid is not exposed to extreme temperatures.
The information contained herein is based on data considered accurate.
Hydronic heating systems must be filled with water to provide the heat transfer fluid htf that makes them work.
The renewable green alternative to ethylene or propylene glycol has a slower thermal degradation rate than both ethylene glycol and propylene glycol and outperforms propylene glycol s viscosity at lower temperatures.
Propylene glycol pg has become the most common heat transfer fluid used in closed loop solar heating systems that contain antifreeze.
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.
Prosol l ht is a clear yellow colored practically odorless liquid based on virgin not recycled propylene glycol water and specially designed industrial package of liquid inhibitors it has been designed specifically for use as a heat transfer fluid in solar thermal systems operating under elevated thermal conditions vacuum tube collectors.
Never use less than 20 glycol in the mix.
It has a long track record over many decades in this application and is widely available from a number of sources.