Dometic VN670 - Manual (Page 9)

Volvo L-4 Installation Guidelines
ENGLISH 9
INSTALLING THE SUPPLY AIR
DISTRIBUTION
For the L-4 chassis installation, you will use the
factory-installed Volvo ductwork for supply air distri-
bution. In addition, you will add one or two 4" ducts to
extra discharge grills. The 10,000 BTU air conditioner
uses one 4" duct, and the 14,000 BTU system uses
two.
Connecting to the Volvo Ductwork
First, remove the rubber duct transition that is located
in the passenger-side luggage compartment (Fig. 11).
It is secured only by force, so you can remove it by
pulling.
Remove the duct from the truck, and cut a 4” hole as
shown in the photograph (Fig. 12).
Find the V4 RND black 4" round grill. Trim the flange
on two sides, as shown in the photographs (Figs. 1-
14), so it will fit into the duct transition.
Figure 12 - Hole cut in duct transition
Figure 13 - First trimming cut on 4" grill
Figure 14 - V4 RND trimmed to fit
Figure 11 - Duct transition location
Rubber duct transition