Panasonic FV-15NLFS1 Installation And Operating Instructions Manual page 7

INSTALLATION
4.Install Φ6 inch ducts.
(1) Connect the circular duct (suggest using
the insulated flexible duct) to adaptor by
mastic or approved foil tape.
Place/wrap insulation around duct and/or
fan in order to minimize possible
condensation buildup within the duct.
(Fig.6)
Note
Install the exterior duct with a declining
slope toward outer side at least 1/100.
Install the interior duct with a declining
slope toward inner side at least 1/100.
(Fig.6)
5.Set an square inspection hole
of 450 mm or more under the
maintenance board. (Fig.7)
6.Twist hand screw open maintenance board and pull out the sub-efficient filter,
fill in beginning time on sub-efficient filter, then install back. (Refer Fig.13 ~ 15 on P.10 ~ 11)
Interior duct Mastic or
17 3/4 (450)
Ceiling
Square inspection hole
approved foil
tape
Adaptor
Hanger
Fiberglass insulation
17 3/4 (450)
Ceiling Square inspection hole
Exterior duct
Mastic or
approved foil
Adaptor
tape
Fig.6
Unit : inch (mm)
1 5/8 (40)
Fig.7
7