What should be done with the water resulting from a defrost cycle of an air-to-air heat pump?

During a defrost cycle, an air-to-air heat pump works to remove ice build-up from the outdoor coil. As the system heats the coil, the accumulated ice melts, resulting in water. The appropriate action for this water is to drain it off and away from the outdoor coil to prevent any potential issues.

Draining the water serves several purposes. First, it prevents the water from refreezing on the coil, which could lead to reduced efficiency and even damage to the heat pump. By directing the water away from the unit, you also mitigate the risk of creating slippery surfaces in the vicinity, enhancing safety. Moreover, this process helps maintain the heat pump’s operability during the winter months when defrost cycles are necessary.

In contrast, recirculating the water back into the system could create complications, as it may lead to moisture issues within the heat pump. Storing the water for future use is impractical, as the water doesn't have utility or benefit while sitting stagnant. Evaporating it using the heat pump's heat does not efficiently utilize the system's function, as the primary goal of the defrost cycle is to maintain the operation of the heat pump rather than to handle water management. Therefore, draining the water away is the