Concerning the proper installation of the sensing bulb of a thermal expansion valve that is attached to the evaporator tail coil on a horizontal run, what statement is true?

Correct Answer: Option A — the bulb should be attached so that the pinched off tubing should be oriented down and the capillary tube running to the valve diaphragm should be oriented up

Proper thermal expansion valve sensing bulb placement requires the pinched end down and capillary tube up to prevent non-condensible pockets and ensure correct liquid-vapor phase communication with the power element diaphragm, maintaining accurate superheat control under marine operational conditions.