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

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A C-37 differential controller sees a failed-open (shorted) collector sensor that reads 250°F while the tank is already 170°F. What is the safe fail-safe response?

Run the pump continuously all night Obey the tank high-limit and keep the pump off so the tank is not cooked further; repair the sensor before returning to automatic Bypass the mixing valve so fixtures receive 170°F water Disable the T&P valve

Correct Answer:

Obey the tank high-limit and keep the pump off so the tank is not cooked further; repair the sensor before returning to automatic

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