• Manually adjustable minimum position. In-line, wall or panel mounted.
• Sharp-barb air connections.
• Molded plastic construction.Pneumatic Three-Port Hesitation Relay; Panel, Wall or In-Line Mount| Type | Pneumatic Three-Port Hesitation relay |
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| Operation | Provides minimum outside air damper position |
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| Knob Rotation | Knob has two (2) internal breakaway stops that limit rotation to 188 degrees. Each stop, when removed, adds 56 degrees of rotation. Maximum rotation is 300 degrees. |
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| Capacity (Cv) | 0.003 scfm (1.65 mL/s) |
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| Overview | A three-port hesitation relay provides minimum outside air damper position plus controlled ventilation for large volume unit ventilators. Replacement devices are available for Johnson, Powers, and Barber-Colman devices. |
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| Maximum Safe Operating Pressure (psi) | 30 psi |
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| Airflow Usage | 0.022 scfm (10 mL/s) |
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| Maximum Safe Operating Pressure (kPa) | 205 kPa |
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| Air connections | Barb fittings 5/32 in. (4 mm) O.D. plastic tubing |
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| Operating Humidity Range (% RH) | 5 to 95% RH |
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| Mounting | Wall or In-line or panel |
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| Temperature Range (F) | 32 F to 125 F |
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| Temperature Range (C) | 0 C to 52 C |
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| Dimensions (in.) | 2 1/4 in. high x 2 1/2 in. wide x 3 3/4 in. deep |
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| Dimensions (mm) | 57 mm high x 63 mm wide x 96 mm deep |
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| Includes | 14003030-001, 1 1/2 in. Mounting Clip for mounting relay to wall or panel. Also includes scaleplate and knob, factory mounted and calibrated. Use with MP909 or MP918 Damper Actuator having a 7 to 13 psi (50 to 90 kPa) spring range |
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