Description
The Cleveland Controls DFS-221-112 is a dependable, fixed-setpoint air flow switch engineered for HVAC and combustion applications where reliable airflow verification is critical. Designed to operate on pressure rise, this SPDT switch activates at a precisely calibrated .05″ ±.02″ w.c., making it ideal for proving airflow in furnaces, air handlers, and combustion equipment.
Key Features
- SPDT (Single-Pole, Double-Throw) switching action for versatile control wiring
- Fixed setpoint — operates on pressure rise at .05″ ±.02″ w.c.
- Wide voltage range: 120–277Vac for compatibility with commercial and residential systems
- 1/4″ barbed port connections for easy tubing attachment
- Maximum operating pressure: 1/2 PSI
- Compatible with air and combustion by-products that will not degrade silicone
Specifications
- SKU: DFS-221-112
- Brand: Cleveland Controls
- Switch Type: SPDT
- Operating Mode: Fixed, pressure rise
- Setpoint: .05″ ±.02″ w.c.
- Voltage: 120–277Vac
- Port Connection: 1/4″ barbed
- Maximum Pressure: 1/2 PSI
- Media Compatibility: Air or combustion by-products that will not degrade silicone
Applications
- Furnace and air handler airflow proving
- Combustion equipment safety interlocks
- HVAC duct pressure monitoring
- Fan and blower operation verification
The DFS-221-112’s broad 120–277Vac input range and silicone-compatible media rating make it a versatile choice for both light commercial and residential HVAC installations. Its 1/4″ barbed connections simplify field installation, while the precise fixed setpoint ensures consistent, repeatable performance in demanding airflow sensing applications.
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