Vissani QR026 Use And Care Manual page 8

Pre-Installation (continued)
For back venting:
□ Cut one rectangular hole (10) with a width of 260 mm
(10 1/4 in.) and a depth of 90 mm (3 1/2 in.) in the back
wall. Center the hole on the center line (12) of the cabinet
and place it 8 mm (9/29 in.) below the cabinet.
□ Cut one circular hole (11) of a diameter of 32 mm (1 1/4 in.)
in the back wall. Place its center 185 mm (7.28 in.) from
the center line (12) of the cabinet and 20 mm (0.79 in.)
from the bottom of the cabinet.
Follow these guidelines when installing duct work:
□ Your venting system must vent to the outdoors either
horizontally through the back wall (13) or vertically through
the roof (14).
□ Use round metal duct work with a uniform diameter of
152 mm (6 in.). The total duct run in the venting system
should be at least 5.79 m (19 ft) and not more than
10.7 m (35 ft).
□ Fasten all connections between pieces of duct with sheet
metal screws and tape all joints with certified duct tape.
□ If you must turn the path of the duct work using elbows,
keep the number of elbows to a minimum for effective
performance and use no more than three 90° elbows.
Ensure that there is a minimum of 458 mm (18 in.) of
straight vent between each elbow. Elbow as far away from
the range hood's exhaust opening as possible.
□ Cap the exterior of the duct with a wall cap (15) or roof
cap (16). Never use 102 mm (4 in.) laundry-type wall caps.
Use caulking to seal exterior wall or roof opening around
the cap.
□ The venting system must have a damper. If the roof or wall
cap has a damper, do not use the damper (C) supplied with
the range hood (A).
□ Calculate the length of the duct work by adding the lengths
in the table to the right for each piece of duct in the
system.
Horizontal Wall Venting
Type of duct
45° Elbow
90° Elbow
90° Flat elbow
2.74 m (9 ft) Straight duct
For inside venting system (air does not exhaust to outdoors)
see drawing below:
Please refer to Section 5 of Page 10, the cover on top plate will
be removed and air will be exhausted through the charcoal filter
and out from 17.
8
Vertical Roof Venting
15
13
Length added
914 mm (36 in.)
1.52 m (5 ft)
3.66 m (12 ft)
2.74 m (9 ft)
17
16
14