Dometic VN670 Volvo L-4Installation Guidelines, Installing the Remaining 4” Ductwork and Grills

Volvo L-4 Installation Guidelines

Installing the Remaining 4” Ductwork and Grills

The location for the additional discharge grill or grills (one for the 10,000 BTU AC and two for the 14,000 BTU AC) is up to the installer or owner. Based on our experience with this truck chassis, we recommend the following (Fig. 17):

Up through the passenger-side cabinet

Low on the floor, driver’s side, in front of the cabinets

You will need to install a new plenum on top of the CHEB unit. Use a ¼" nut driver to remove the plastic 7" hose adaptor. Remove the top cover plate with the four screws, and reinstall on the side hole. Find the 4 x 4 x 4" three-way plenum or 4 x 4" two-way plenum. Reinstall the screws into the new plenum (Figs. 18a- 18b).

Important! Refer to the Dometic instal- lation manual for details in connecting ductwork to the discharge grills and CHEB plenum.

Figure 17 - 4" ducts installed low on the floor on the driver’s side

Figure 18a - Installing the air distribution plenum

Figure 18b – Installing the air distribution plenum

Figure 19 - CHEB with ductwork installed

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