Product Overview

The performance specifications are nominal and conform to acceptable industry standards. For applications 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. © 2011 Johnson Controls, Inc.
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Selection Charts
S-224 Pneumatic Gradual Switch
Code Number Description
Span per 300° knob rotation with range of 0 to 20 psig:
S-224-1
1
1. Order Dials Separately
20 psi Span
S-224-2 2 psi (Adjustable over Range)
Accessories for S-224 Pneumatic Gradual Switch
Code Number Description
S-224-100 Conversion Kit to Convert any S-224 to a 2 psi Span
S-224 Dials; 180° Knob Rotation – 12 psi Span:
S-224-50 Temperature Increase (CW)
S-224-51 Pressure Increase
S-224 Dials; 225° Knob Rotation – 15 psi Span:
S-224-53 Temperature Increase (CW)
S-224-54 Pressure Increase (CW)
S-224 Dials; 300° Knob Rotation – 20 psi Span:
1
1. 2 PSI per 300° Rotation
S-224-58 Temperature Increase (CW)
S-224-61 Temperature Increase (CCW)
S-224-59 Pressure Increase (CW)
S-224-60 Humidity Increase (CW)
S-224-63 Open-Closed
S-224-64 Closed-Open
2
2. Damper Position Inscribed Across Dial
S-224
Pneumatic Gradual Switch
Description
The 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, which
will maintain a selected output pressure
setting until it is readjusted.
Refer to S-224 Pneumatic Gradual Switch
Product Bulletin (LIT-7171370P) and S-224
Gradual Switch Dials Construction Bulletin
(LIT-7171370X) for important product
information.
Code No. LIT-1921555
Issued January 15, 2008
S-224 Series Gradual Switch
Features
• adjustable setting from 0 to 20 psig
(140 kPa)
• 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
(27 mm)
Repair Information
If the S-224 Pneumatic Gradual Switch fails to
operate within its specifications, replace the
unit. For a replacement switch, contact the
nearest Johnson Controls® representative.