JOHNSON DIFFERENTIAL CONTROL .5 - 5 W.C.

JOHNSON DIFFERENTIAL CONTROL .5 - 5 W.C. Ambient Operating Temperature: - 40 to 165F Max Pressure at either end: 1 PSIG Set Point: Normally Factory Set at bottom of range with diaphragm in a vertical plane, SPDT Models are normally set where red to yellow contacts open. Factory setting is made at room temperatures. The P32 differential pressure switch is used to sense flow of air in ducts. When used with electric strip heaters, the switch can be wired to open the circuit and deenergize the heaters when air flow stops. Typical applications include: • Air proving with electric duct heaters. • Maximum air flow controller for variable air volume systems. • Reheat duct powered systems. • Detection of icing of air conditioning coils and initiation of defrost cycle. • Clogged filter detection. Features • Easy-to-read set point scale. • Small and compact. • Versatile mounting options. All P32 pressure switches are designed for use only as operating controls. Where an operating control failure would result in personal injury and/or loss of property, it is the responsibility of the installer to add devices (safety, limit controls) or systems (alarm, supervisory systems) that protect against, or warn of, control failure