Where is the line from the external equalizer typically installed?

The line from the external equalizer is typically installed after the sensing bulb on the suction line. This placement is critical because it allows for the accurate measurement and adjustment of the refrigerant pressure within the evaporator. By connecting the external equalizer after the sensing bulb, it ensures that any pressure fluctuations caused by changes in load can be immediately accounted for, leading to more precise control of the compressor's operation. This setup helps maintain the proper suction pressure, contributing to efficient cooling performance.

The positioning helps in balancing the pressures in systems where the temperature is not uniform across the evaporator coil, facilitating better performance and protection of the compressor from potential damage due to under or overpressure scenarios. This understanding is fundamental in ensuring the system operates smoothly and efficiently.