S-224 Pneumatic Gradual Switch Product Bulletin1 Refer to the QuickLIT website for the most up-to-date version of this document. The Johnson Controls® S-224 Pneumatic Gradual Switch provides manual selection of the pressure in air lines from a remote location. The S-224 is a proportional action relay type switch that maintains a selected output pressure setting until it is readjusted. The setting can range from 0 to full supply pressure up to 20 psig. The extremely stable output of the S-224 makes the switch ideally suited for position controlled devices or for use as a remote pneumatic set point adjuster. A model is available with 2 psi span per dial revolution of 300 angular degrees. Graduated dials are available with various inscriptions to adapt the switches to a broad range of functions. The 2 psi span switch can be used with 0 to 20 or 6 to 12 psi span dials. See Construction Details S-224-2 for dial descriptions. Features •adjustable setting from 0 to 20 psig (140kPa) •available with 2 psig (14 kPa) span per dial revolution of 300 angular degrees, which can be set anywhere between the 0to20psig •graduated dials are available with various inscriptions to adapt the switches to a broad range of functions •mounts flush on a control panel with a maximum thickness of 1-1/16 inch (27mm) Dimensions Figure 1: S-224 Pneumatic Gradual Switch Figure 2: S-224 Switch Dimensions, in. (mm) S-224 Pneumatic Gradual Switch Product Bulletin Code No. LIT-7171370P Part No. 24-4699-3, Rev. B Issued March 2016 24-4699-3, Rev. BS-224 Pneumatic Gradual Switch Product Bulletin2 Mounting The S-224 is designed to be flush mounted on a control panel up to 1-1/16 in. thick. The key slot on the mounting shaft must be located so that the bottom of the dial is in the correct position. See Figure2 for dimensions. Adjustment To set the maximum pressure limit of the S-224: 1.With a test gage in the output line and air supplied to the switch, turn the adjusting shaft clockwise against the stop. 2.Loosen the locknut and adjust the calibrating set screw until the required maximum output pressure is obtained. Retighten the locknut. 3.Replace the knob so that it indicates the maximum pressure (225 angular degrees for 15 psi; 300angular degrees for 20 psi). Selection Accessories Repair Information If the S-244 Pneumatic Gradual Switch fails to operate within its specifications, replace the unit. For a replacement sensor, contact the nearest JohnsonControls® representative. Figure 3: S-224 Switch Cutaway Code NumberDescription Span per 300 knob rotation with range of 0 to 20 psig: S-224-1 1 1.Order Dials Separately 20 psi Span S-224-22 psi (Adjustable over Range) Code NumberDescription S-224 Dials; 180 Knob Rotation – 12 psi Span: S-224-50Temperature Increase (CW) S-224-51Pressure Increase S-224 Dials; 225 Knob Rotation – 15 psi Span: S-224-53Temperature Increase (CW) S-224-54Pressure Increase (CW) S-224 Dials; 300 Knob Rotation – 20 psi Span: 1 1.2 PSI per 300° Rotation S-224-58Temperature Increase (CW) S-224-61Temperature Increase (CCW) S-224-59Pressure Increase (CW) S-224-60Humidity Increase (CW) S-224-63Open-Closed S-224-64Closed-Open 2 2.Damper Position Inscribed Across DialPublished in U.S.A.www.johnsoncontrols.com S-224 Pneumatic Gradual Switch Product Bulletin3 Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc. All other marks herein are the marks of their respective owners. © 2016 Johnson Controls, Inc. Building Efficiency 507 E. Michigan Street, Milwaukee, WI 53202 Technical Specifications S-224 Pneumatic Gradual Switch ActionProportional Action Relay Output Pressure Range6 to 12 psig; 0 to 20 psig; 0 to 20 psig, 2 psi Span Maximum Supply Pressure25 psig Maximum Control Pressure20 psig MaterialBodyDie Cast Zinc Dial PlateBrass, Satin Chrome Finish KnobImplex Plastic MountingFlush Panel (1-1/16 in. Maximum) Air Connections1/8 in. FPT Ambient Temperature Limits-40 to 200 F (-40 to 93 C) The performance specifications are nominal and conform to acceptable industry standard. For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. European Single Point of Contact:NA/SA Single Point of Contact:APAC Single Point of Contact: JOHNSON CONTROLS WESTENDHOF 3 45143 ESSEN GERMANY JOHNSON CONTROLS 507 E MICHIGAN ST MILWAUKEE WI 53202 USA JOHNSON CONTROLS C/O CONTROLS PRODUCT MANAGEMENT NO. 22 BLOCK D NEW DISTRICT WUXI JIANGSU PROVINCE 214142 CHINANext >