Viking VWH Installation Instructions - Page 27

Planning Information Proper installation of ducting is extremely important to ensure maximum performance from any ventilation product. • All CFMs are based on tests at 0.1 static pressure: without applying static pressure, CFM would be greatly overstated. • Straight runs and gradual turns are best; for example, each 90º elbow is equivalent to 5-10 feet (1.52-3.05 cm) of straight run. • Never use flexible duct; it creates back pressure/air turbulence and greatly reduces performance. • Proper performance is dependent on proper ducting; make sure that a qualified and trained installer is used. • Check with a qualified and trained installer or local codes for makeup air requirement, if any. • Max. amp rating for hoods includes recommended ventilator kit rating; all products must be hard wired direct with 2-wire with ground. Plan where the duct work will be located. Install propersized duct work, and roof or wall cap for the type of blower you are using. Recommended hood locations for the most common installations are shown. Adjust your measurements for various heights of ceilings, soffits, cabinets, or ranges/rangetops. Check Framing NOTE: Because of the weight of the hood make sure that the mounting screws are driven into the framing and not just the drywall. It may be necessary to drill additional holes in the canopy for proper alignment. Roof Cap 7" round duct 300 or 600 CFM single blower interior-power typical ductwork Duct cover or soffit Hood Roof cap 10" round duct 1200 CFM single blower interior power typical ductwork Duct cover or soffit Hood Exterior blower 10" round duct 900, 1200, or 1500 CFM exterior power typical ductwork Duct cover or soffit Hood Wall Cap Duct Wall Installation exterior power typical ductwork Duct cover or soffit Hotte NOTE: Wall exhaust must be a minimum of 24" (61.0 cm) from ground. This may vary depending on local codes and geographic location. 27