How is the suction pressure affected when the superheat increases due to high indoor temperatures?

When superheat increases due to high indoor temperatures, the suction pressure rises. This occurs because superheat is the additional heat absorbed by the refrigerant after it has completely vaporized. When indoor temperatures are high, the evaporator coil temperature also increases, leading to a higher temperature of the refrigerant vapor returning to the compressor.

As the superheat increases, it indicates that the refrigerant is absorbing more heat, which corresponds to a reduction in the amount of refrigerant that is cooling the space. Consequently, this elevated thermal energy results in a higher pressure at the suction line before the refrigerant enters the compressor. Therefore, the relationship between increased superheat and the rise in suction pressure is a direct reflection of the changes in thermal dynamics occurring within the system under high indoor temperature conditions.

In summary, an increase in superheat contributes to an increase in suction pressure, reflecting the interaction between system temperature, refrigerant phase change, and pressure dynamics.