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 |
|---|---|
| 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
Q & A: Ask the Questions, share answers
Do you have questions about this product?
$ USD
CAD
-Air-Pressure-Switch-AA-A1-0-3-04-4-inch-WC.png "Dungs 277328 Air Pressure Switch (AA-A1-0-3) 0.4 to 4\" W.C. 1.5 psi")
-Air-Pressure-Switch-AA-A1-0-3-04-4-inch-WC.png "Dungs 277328 (216-752A) Air Pressure Switch AA-A1-0-3 0.4 to 4\" W.C. 1.5 psi")
-Air-Pressure-Switch-AA-A1-0-3-04-4-inch-WC-1.png "Dungs 277328 (216-752A) Air Pressure Switch AA-A1-0-3 0.4 to 4\" W.C. 1.5 psi Dimensions")