Galvanized steel round metal ductwork connects to the main supply air duct with a bellmouth fitting, maintaining a minimum distance of four duct diameters from main duct elbows and transitions. The variable air volume box is suspended from the structure above by means of a deferred submittal designed by the mechanical contractor. A nine-inch by nine-inch access door is furnished with the unit along with a five-foot long discharge air plenum featuring an internal one-inch liner. The distance from the VAV box to the main duct varies, requiring transitions where plans indicate different duct sizes due to long runs.
D 6 5 1 2 3 GENERAL NOTES 1. DISTANCE FROM VAV BOX TO MAIN DUCT VARIES. ABOVE LENGTH IS A MINIMUM. IN CASE PLANS SHOW DIFFERENT DUCT SIZES DUE TO LONG RUN, SIZES SHOWN ON PLANS SHALL BE FOLLOWED AND CONTRACTOR TO PROVIDE TRANSITION TO THE VAV INLET DUCT DIAMETER. NOTES ALL TAPS INTO MAIN SUPPLY AIR DUCTWORK FOR VAV BOXES SHALL BE A MINIMUM OF 4 X D FROM THE MAIN DUCT ELBOWS AND TRANSITIONS. GALVANIZED STEEL ROUND METAL DUCTWORK CONNECTED TO MAIN SUPPLY AIR DUCT WITH BELLMOUTH FITTING. VARIABLE AIR VOLUME BOX (VAV) SUPPORT TO STRUCTURE ABOVE SHALL BE A DEFERRED SUBMITTAL BY THE MECHANICAL CONTRACTOR. 1 2 3 9"X9" ACCESS DOOR FURNISHED WITH VAV BOX. 5 DUCT DIAMETERS (D) MINIMUM. CONTRACTOR SHALL PROVIDE 5'-0" LONG DISCHARGE AIR PLENUM WITH INTERNAL 1" LINER PER SPECIFICATION SECTION 230713. 4 5 6 4
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