Abstract: A system for directing a water spray onto the condenser unit of an air-cooled air conditioner in response to the operation of an air actuated valve when the air conditioner is energized; the air actuated valve is disposed in the exhaust air stream of the motor driven fan which normally creates a cooling air flow through the condenser unit of the air conditioner. The air actuated valve directs a stream of water from a line connected to a controlled pressurized water source to a water manifold provided with a plurality of branch conduits, fitted with spray nozzles, positioned to direct a water spray onto the condenser coils.