Viking VBCV48381 Installation Instructions - Page 16

Built-In Wall Custom Ventilator System Dimensions (VBCV Models) 1200 or 1500 CFM Exterior or In-Line Ventilator Installation 48", 54", 60", 66" W. Models 1200 CFM Interior Ventilator Installation 30", 36", 42", 48", 54", 60", 66" W. Models 30" W. 36" W. 42" W. 48" W. 54" W. 60" W. 66" W. C 28-1/4" (71.8 cm) 34-1/4" (87.0 cm) 40-1/4" (102.2 cm) 46-1/4" (117.5 cm) 52-1/4" (132.7 cm) 58-1/4" (148.0 cm) 64-1/4" (163.2 cm) 30" W. 36" W. 42" W. 48" W. 54" W. 60" W. 66" W. D 14-1/8" (35.9 cm) 17-1/8" (43.5 cm) 20-1/8" (51.1 cm) 23-1/8" (58.7 cm) 26-1/8" (66.4 cm) 29-1/8" (74.0 cm) 32-1/8" (81.6 cm) 30 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 proper-sized 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. 31