NV C-37 Solar Practice Questions - Nevada C-37 Solar Contractor Examination Exam

Why does FSEC put a check valve in a filled C-37 collector loop?

To replace the potable T&P valve To stop night reverse-thermosiphon that would cool the tank through the collectors To increase collector stagnation temperature To convert the loop to photovoltaic operation

Correct Answer:

To stop night reverse-thermosiphon that would cool the tank through the collectors

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