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

A C-37 glazed array of four collectors is piped reverse-return (Tichelmann). What is the purpose of that layout?

To make the first collector receive all the flow To convert the system from thermal to photovoltaic To drain only the last collector in a freeze To give each collector nearly the same total supply-plus-return path length so flow balances without a separate balancing valve on every panel

Correct Answer:

To give each collector nearly the same total supply-plus-return path length so flow balances without a separate balancing valve on every panel

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