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Is the differential adjustment fixed or variable on this model
effectively maintaining a 30°F differential to prevent heat exchanger overheating
specifically in air handler fan circuits
making it essential for HVAC zone valve actuator replacements in commercial fan coil units and baseboard systems
Johnson Controls P-3800-2 Controller Freon Is the differential adjustment fixedThe Johnson Controls P 3800 2 is a professional grade Reset Volume Controller engineered for precise airflow regulation in Variable Air Volume (VAV) systems. Designed as a pressure independent submaster device, it maintains accurate volume control between adjustable minimum and maximum setpoints in response to a thermostat or master controller signal. This unit supports a 13 25 PSIG supply pressure range and operates with a primary input capacity to
US$ 111.34
US$ 30.00