The Dungs 277328 (AA-A1-0-3), formerly 216-752A, is an air pressure switch without a cover. It has a 0.4 to 4" W.C. factory setting range and 1.5 psi maximum pressure capacity. CSA Certified, FM Approved, and UL Recognized.
Materials:
The switch monitors firing operations and can function without auxiliary power. This device makes or breaks a circuit when the medium pressure shifts relative to its set point.
The 277328 is designed for automatic burner controls. Suitable for air or non-aggressive gases and not for natural gas, propane, butane, and combustible gases.
Pressure Connection | 0.16" (4 mm) Diameter Hose Connection |
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Electrical Connection | 1/4 x 1/32” (6.3 x 0.8 mm) Flat Male Terminals |
Switch | SPDT |
Electrical Ratings | 24 to 240 VAC; 12 to 48 VDC |
Ambient Temperature Range | -40 to 104°F (-40 to 40°C) |
Maximum Operating Pressure | 1.5 psi (103 mbar) |
Factory Setting Range | 0.4 to 4” W.C. |
Switching Contact Material | Silver (Ag) |
Housing and Switch Material | Polycarbonate |
Diaphragm Material | NBR-Based Rubber |
Download Product Information:
Dungs AA-A1 Differential Air Pressure Switch Installation Guide
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