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Simple installation. VAV SYSTEM FEATURES ( One Of Many Types ) Electric or Pneumatic or Digital Controls “In Duct” &/or “At Diffuser” Locations Pressure,

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Presentation on theme: "Simple installation. VAV SYSTEM FEATURES ( One Of Many Types ) Electric or Pneumatic or Digital Controls “In Duct” &/or “At Diffuser” Locations Pressure,"— Presentation transcript:

1 Simple installation

2 VAV SYSTEM FEATURES ( One Of Many Types ) Electric or Pneumatic or Digital Controls “In Duct” &/or “At Diffuser” Locations Pressure, Temperature And/Or Flow Sensors VAV The Current State Of Technology In HVAC ! Good site to visit & see animations of various VAV systems types! How different systems work and why ! POSSIBLE MAIN DUCT VAV Fan Speed > Current Basic Commercial HVAC Systems VAVs partial open Typically Fan 17

3 HVAC General Rules of Installation Distance from InDuct to Air Outlets. Do not exceed 20 meters It’s more of an art than a science. Even the Pros don’t always agree !

4 GENERAL COMMERCIAL “Duct Cell” PLACEMENT. You Have Two Options ! 1] You can place ALL duct cell units in the “plenum”. OR IF there are reasons that this approach might not work; 2] Then review the duct blueprint and split the duct system into sections that have approximately the “ =< ft 2 coverage” of the duct cell you have selected. Then place a cell at any suitable upstream “insertion point” for that section. REMEMBER: Sq Ft coverage ( 8’ ceilings) ~= CFM Sum-total cfm = cfm 400 cfm 500 cfm 500 cfm 600 cfm 600 cfm 500 cfm 500 cfm 1000 cfm 1000 cfm 300 ft duct Plus an In-line VAV valve Sum-total cfm= cfm

5 54” x 8” ~ 3500 cfm 1750 sum cfm Radius Bends 50 ft 41” x 8” duct EXAMPLE # 3 B ahrain- M ulti S tory B ldg - ½ of floor Total of 5,118 sq ft per floor- 3 floors 8 ft drop ceilings – 10 ft total 4 air handlers = 2 mains & 2 overload 1 cell guideline 2000 sq ft - very bad air Inside Walls 2140 sum cfm Possible cell locations VCD box Return air registers 32”x 8” 900 cfm Loading Issues A/C only runs at night Return air is Via dead space Occupancy can spike to 150


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