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Chapter 3 — System Design <br /> Page 3 -10 <br /> REV. 2 <br /> 2. Protecting Duct and Plenum on Local Application Systems <br /> On systems requiring local application protection in the work area, the duct and plenum can be protected utilizing a <br /> PCI -35ABC system with three nozzles. <br /> PCI -35ABC with 3 nozzles <br /> CYLINDER <br /> T1 � T2 <br /> NOZZLE <br /> 002867PC <br /> Maximum Length Elbows <br /> Cylinder Size Nozzle Quantity Nozzle Type Piping Section Size Maximum Maximum <br /> • PCI -35ABC 3 Two N -PLU Cylinder to T1 3/4 in. 30 ft. (9.1 m) 4 <br /> One N -DCT <br /> ► T1 to T2 3/4 in. 12 ft. (3.7 m) 2 <br /> ► T2 to Nozzle 3/4 in. 8 ft. (2.4 m) 2 <br /> ► T1 to Nozzle 3/4 in. 12 ft. (3.7 m) 2 <br /> NOTE: <br /> 1. These limitations apply to PCI -35ABC using three nozzles (2 N -PLU and 1 N -DCT). <br /> 2. For systems that have been tested with unbalanced piping, the difference in the length of piping must not exceed 10% of <br /> the maximum unbalanced ratio tested. <br /> 3. A Main /Reserve Swing Check Valve, Part No. 417788, may be located between the cylinder and T1. <br /> 4. Minimum requirements for piping and fittings do not apply to systems protecting hazards with no splashable hazard. A <br /> splashable hazard exists where liquid fuel in depth greater than 1/4 in. is present. <br /> 5. N -DCT nozzle must be located on T1 to nozzle branch. <br /> ULEX 3437 CEx732 <br /> September 1, 2006 <br />