Siemens Combustion SQN71.603R19 Reversing Actuator 120 VAC

The Siemens Combustion SQN71.603R19 is a 120-volt AC (VAC) reversing actuator intended for use in a variety of HVAC systems. The HVAC equipment's control system sends an electrical signal of 120VAC to the actuator. The actuator's internal motor rotates in response to the signal it receives, activating a mechanism that changes the linked medium's flow direction (air or water). This enables the system to change the direction of the water flow in chiller applications or to switch between heating and cooling modes in air handlers. The actuator maximises the efficiency of the system by precisely regulating the flow direction. It guarantees that cold air is provided during cooling and hot air is delivered during heating in air handlers, avoiding needless mixing and possible energy waste.