Printed in U.S.A. 5/10 © Copyright 2010 Schneider Electric All Rights Reserved.F-16160-9 Application For low or line voltage control of static, velocity or total pressures, or differential static or total pressures of air and non-combustible gases only. Specifications Setpoint: Factory Set, 0.07" (1.8 mm) W.C. Field Adjustable, 0.07 to 1" (1.8 to 25.4 mm) W.C. Sensing Element: Neoprene diaphragm. Differential: 0.04" (1 mm) W.C. at minimum setpoint to 0.1" (3 mm) W.C. at maximum setpoint. Environment: Ambient Temperature Limits, Shipping, -40 to 140°F (-40 to 60°C). Operating, 35 to 140°F (0 to 60°C). Humidity, 5 to 95% R.H., non-condensing. Locations, NEMA Type 1 indoor only. Maximum Pressure: 12" (305 mm) W.C. Electrical Switch: Snap action SPDT. Ratings, See Table-1. Connections, Code screw terminals Case: All metal with 1/2" conduit opening. Mounting: In vertical position on any surface free of vibration. Dimensions: 5-1/8" high x 4-3/4" wide x 4-3/8" deep (130 mm x 121 mm x 111 mm). Accessories AP-302Static probe for turbulent air AP-305Static probe for low actuating pressure AT-208Duct mtg. kit for remote probes other than AP-302 or AP-305 Pre-Installation Inspection Visually inspect the carton for damage. If damaged, notify the appropriate carrier immediately. Visually inspect the device for obvious damage due to shipping. Return damaged parts to place of purchase. Required Installation Items • Wiring or piping diagrams • Appropriate screwdrivers (not provided) for mounting screws (provided) • Conduit fittings (not provided) Installation Caution: 1.Installer must be a qualified, experienced technician. 2.Disconnect power supply before installation to prevent electrical shock. 3.Make all connections in accordance with the wiring diagram, and in accordance with national and local electrical codes. Use copper conductors only. 4.Avoid locations where excessive moisture, corrosive fumes or vibrations are present. NEMA 1 devices are intended for indoor use primarily to provide a degree of protection against contact with the enclosed equipment. 5.For use with air or non-combustible gases only. Table-1Maximum Electrical Switch Ratings Vac Full Load Amps Locked Rotor Amps Pilot Duty (VA) Non-Inductiv e Amps 24V----60-- 120V6.2537.5300-- 240V3.118.6300-- 277V2.716.230010 PC-301 Differential Pressure Switch General Instructions2© Copyright 2010 Schneider Electric All Rights Reserved.F-16160-9 Figure-1 Direct Mounting of Probe and Dimensions. Figure-2 Remote Mounting of Probes. Figure-3 Switch Action and Terminal Identification. Mounting 1.Select direct or remote mounting. For field mounting use mounting bracket as a template. For factory mounting use dimensions provided. See Figures-1 and 2. 2.Select appropriate probes from Tables-2 and 3. Probes: Probes can be constructed from 1/4" O.D. cop- per, brass, or aluminum tubing. The ends of the probes should be cut square to the sides of the tube and deburred. Total pressure probe must have the sensing end bent at 90°, approximately 1" to 3" (25 mm to 76 mm), from the tip. Use AT-208 kit to mount probe to duct. Use AP-302 static probe in areas with air turbulence caused by filters, dampers, etc. Not included. Use AP-305 static probe where there is very low actuat- ing pressure. 3.Install probe. See Figure 4. Sampling probes should be located in areas of minimum air turbulence (6 to 8 duct diameters downstream from fan outlet, elbows, tees, or dampers). If this is not possible, locate the probe tip as close to the center of the duct as possible. Figure-4 Sample Probe Identification. Figure-5 Optional Probes. 4.Mount the PC-301. Note: The diaphragm must be mounted in a vertical plane and in a location free from vibration. 5.Connect the remote probe(s), if any, to the PC-301. AP-302 static probe is used in areas with air turbulence caused by filters, dampers, etc. at velocities up to 12,000 fpm (3658 mpm). AP-305 static probe is used where there is a very low actuating pressure.F-16160-9 © Copyright 2010 Schneider Electric All Rights Reserved.3 6.Make all connections in accordance with job wiring diagrams and in compliance with national and local codes. On an increase of air pressure to above setpoint, common contact of switch is made to normally open contact. On a decrease of air pressure to below setpoint, common contact of switch is made to normally closed contact. Figure-6 Part Identification. Adjustment To increase setpoint, turn adjustment screw clockwise. Adjustable 0.07" ±0.02" to 1.0" (1.78 mm ±0.5 mm to 25 mm) W.C. To decrease setpoint, turn adjustment screw counterclockwise. Note: Units are shipped at minimum setpoint. If readjustment to minimum setpoint is required, proceed as follows without any air pressure applied to diaphragm. 1.Turn adjustment screw full CCW. 2.Push on spring at point A (Figure 6) and maintain pressure during steps 3 and 4. 3.Turn adjustment screw CW until common contact is made to normally open contact. 4.Turn adjustment screw CCW until common is made to normally closed contact. Then turn adjustment screw 1/8 turn more CCW. * Highest (absolute) pressure should be applied to high pressure tap. **Pilot can be used instead of two probes Δ = Differential Table-2Direct Mount of One Probe. StaticVelocityTotal Δ Static Δ Total High Pres. Tap* Probe 1Probe 2Probe 2Probe 1Probe 2 Low Pres. Tap -- Probe 3 Remote -- Probe 3 Remote Probe 4 Remote Table-3Remote Mounting of Probe(s). StaticVelocity**Total Δ Static Δ Total High Pres. Tap* Probe 3Probe 4Probe 4Probe 3Probe 4 Low Pres. Tap --Probe 3--Probe 3Probe 4Copyright 2010, Schneider Electric All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice. F-16160-9 www.schneider-electric.com/buildings Schneider Electric 1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940 On October 1st, 2009, TAC became the Buildings business of its parent company Schneider Electric. This document reflects the visual identity of Schneider Electric, however there remains references to TAC as a corporate brand in the body copy. As each document is updated, the body copy will be changed to reflect appropriate corporate brand changes. Next >