Question

When a condensing unit is installed at a higher elevation than its evaporator, a U-bend should be put in the suction line to ____.

Answer 1

The warm liquid line would transfer heat to the cooler suction line. If the evaporator (indoor unit) is installed higher in elevation than the condenser (outdoor unit), there should ideally be a slope to the suction line with a fall of ¼-inch per linear foot toward the condenser (outdoor unit). So, transfer heat.