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. -- SECTION IV - SYSTEM DESIGN UL EX. 3470 ULC CEx747 Page 4-44 REV. 3 10-1-02 DISTRIBUTION PIPING REQUIREMENTS (Continued) Supply and Ekwtch Line Identification (Continued) .. NOTICE Branch lines cannot start ahead of a supply ine tee. DUCT BRANCH LINE The Duct Branch Line is defined as the leng1h of pipe which runs from the supply Ine to the duct nozzle(s). This includes all branch line fittings as well as the tee or elbow used to start the branch line. .. See Figures 78 and 79. DUCT BRANCH lINE -----+ (ELBOW INCLlJlED) ........ .> .... .... 0('..' t ."., t .. f.... I . I I o .. DUCT BRANCH LINE (TEE INCLUDED) t( __.0' "s....,.' · .. . ...,,"i ........ DueT BRANCH UNE \ ! "'" ~,~ 0 0, ~ _~....._oV' ..J..... t ..-"".'1 .' ..' (' . I 6 FIGURE 79 000181 PLENUM BRANCH LINE The Plenum Branch Iile is defined as the length ci pipe which runs from the supply line to the plenum nozzle(s). Thisroudes all branch line fittings as well as the tee or elbow used t> start the .. branch line. See FigtnS 77 and 80. ..4 , ... 4(;; .... - .....,;; .' - ,.. I PLENUM BRANCH LINE l (TEE INCLUDED) I o .. ..4 ..- . --<'t'" .' .' ." .' ," .' (., PLENUM BRMCH UtE I (TEE INCLUIBIt . I . ~ FIGURE 80 000782 APPLIANCE BRANCH LINE The Appliance Branch Line is defined as the length ci pipe which runs from the supply Iile to the appliance nozzle(s).1Ns includes all branch line fittings as well as the tee or elbow used to start the ~ branch line.. See FigtnS 78 and 81. .. :t A APPLIANCE BRANCtI UNES U "'" ",,,"- ~ RGURE 81 000783