What is the recommended operating pressure for the suction line in most refrigeration systems?

The recommended operating pressure for the suction line in most refrigeration systems typically falls within the range of 20 to 35 psi. This range is optimal for ensuring that the refrigerant can absorb heat efficiently as it passes through the evaporator coil. It is important for maintaining the proper function of the system, allowing for sufficient vaporization of the refrigerant to provide cooling effectively.

Operating at pressures lower than 20 psi may indicate issues like low refrigerant levels or blockages, which can lead to inefficient cooling and potential damage to the system. Conversely, operating above 35 psi may not allow for adequate heat absorption, reducing the system's efficiency.

Thus, the choice of 20 to 35 psi aligns with industry standards that aim to achieve balanced performance and reliability in refrigeration systems. It’s critical for technicians to ensure that these pressures are monitored and maintained during operation to promote system longevity and efficiency.