DunAn SH-W9 AC 24V 5W 4-Way Reversing Valve Solenoid Coil

Manufactured to ensure efficient operation of 4-way valves (reversing valves) that control refrigerant direction in air conditioners, heat pumps and various refrigeration systems, the DunAn SH-W9 AC 24V 5W Solenoid Valve Coil is a long-lasting and reliable spare part for HVAC professionals. This magnetic coil, which switches the appliance to heating or cooling mode by changing the direction of the refrigerant in the system, operates reliably on a 24V AC supply voltage.

High Performance in Heating and Cooling Changeovers

Trouble-free operation of air conditioners and heat pumps during seasonal changeovers or defrost cycles in winter depends on the valve coil responding instantly and reliably. This DunAn model, with a power consumption of 5W, transfers the magnetic field it creates to the valve body without loss, allowing the mechanism to change position within a second. Thanks to its sturdy metal frame protecting the outer surface and its heat-resistant insulated leads, it offers superior resistance to harsh weather conditions, high temperatures and compressor vibration in outdoor units.

Key Technical Specifications and Equipment

The technical details of this valve coil, designed for long-term use under the harsh conditions of air conditioning and refrigeration systems, are as follows:

• Brand and Model: DunAn / SH-W9 (4-Way Valve / Reversing Valve Coil)
• Operating Voltage: AC 24V
• Power Consumption: 5W
• Connection Type: Two flexible, high-temperature-resistant yellow leads (bare ends without connector).
• Materials: Protective metal outer housing resistant to vibration and corrosion, magnetic winding insulated against moisture and water.
• Compatible Systems: Split air conditioners, VRF/VRV outdoor units, heat pumps and industrial refrigeration equipment using a 24V AC coil control voltage.

Practical Usage Note for Technicians in the Field

Technician's Note: When replacing a faulty 4-way valve coil, completely disconnect power to the appliance at the system fuse. Never test the new coil by energizing it outside before fitting it onto the valve stem (sleeve); coils energized without the stem cannot complete the magnetic circuit and can overheat and burn out within seconds. After seating the coil fully on the valve body and tightening the fixing screw, carrying out a heating and cooling changeover test on the system will prevent loosening and faults caused by vibration in the outdoor unit.