Aaon R70490 24V WATER FLOW SWITCH

The Aaon R70490 is a 24-volt water flow switch designed for commercial and industrial HVAC applications. This critical safety component monitors water circulation in rooftop units, chillers, boilers, heat exchangers, and hydronic heating systems, detecting the presence or absence of water flow to ensure optimal system operation and equipment protection.

Key Features:

• 24VAC operation compatible with standard HVAC control systems
• Detects water flow presence or absence to prevent equipment damage
• Activates alarms or controls pumps and valves based on flow status
• Durable construction designed to withstand harsh commercial environments
• Genuine OEM replacement part ensuring exact fit and function
• Simple installation as a direct drop-in replacement

Applications:

• AAON rooftop units and packaged HVAC systems
• Chilled water and hot water coil protection
• Cooling tower and condenser water monitoring
• Heat pump water flow verification
• Boiler and heat exchanger safety interlocks

The R70490 water flow switch provides reliable monitoring to protect expensive HVAC equipment from damage caused by low or no flow conditions. When water flow drops below the setpoint, the switch triggers system shutdown or alarm signals, preventing coil freezing, pump damage, and compressor failure. This genuine Aaon replacement part maintains published system efficiencies, ratings, and certifications while preserving sound levels and operational performance.