The automatic recirculating valve in the main condensate recirculating line is controlled by a temperature sensor which is located at the __________.

Correct Answer: Option A — air ejector condensate discharge

A temperature sensor located at the air ejector condensate discharge monitors heat absorption. As boiler load decreases, less steam is condensed, elevating water temperature. The sensor actuates the recirculating valve, dumping excess warm water back to the main condenser to protect pumps.