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

Compared with a closed glycol C-37 loop, a drainback system’s distinctive design requirement is which of the following?

A high-head pump, a reservoir below the array, and continuous pitch so the collectors empty when the pump stops A double-wall heat exchanger for food-grade propylene glycol An unglazed pool collector as the only absorber No pump of any kind

Correct Answer:

A high-head pump, a reservoir below the array, and continuous pitch so the collectors empty when the pump stops

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