Trane SWT2978 Dual Pressure Switch

The Trane SWT2978 dual–pressure switch designed mostly for heating ventilation and air- conditioning systems . By checking two types of pressure inside the system it essentially acts as a safety monitor. The switch activates an electrical signal which operates it either when one of these pressures is either above or below a specific level. Fans and dampers or compressors within HVAC system can hence be regulated using this signal to avoid straining the system. Operating at a nominal 24V power supply with maximum current capability of 18A for its operation.