Dometic VN 780 - Manual (Page 14)

english
volvo l-5 a/c - air distribution system
1
installing the plenum on the front
of the cheb
Using a ¼" nutdriver, remove the plastic 5" or 7" oval
hose adaptor. Find the 4"x 6" (or 4"x4") distribution
plenum. Install the weather stripping on the contact
surfaces and place over the hole on the unit. Reinstall
the screws into the new plenum.
installing the cheb
Install the CHEB on the passenger side of the truck.
Locate the CHEB template (supplied with the unit)
and position it with the “edge of the unit” 1-1½" from
the factory HVAC unit mounting foot. The “edge of the
unit” line with the notations for the quick connections
should be nearest the bunk wall. The line of the “edge
of the unit” should be approximately 5" from the bunk
wall.
Mark for the two quick connect holes 3½" off the
“edge of the unit” using the construction lines. Drill
through the rubber mat with a 2½" hole saw (DO NOT
DRILL THROUGH THE METAL). Then drill through the
metal with a 1-7/8" holesaw.
Drill the drain hole with a 1-5/8" hole saw.
Drill for mounting brackets for the CHEB using the
following recommnedations:
Figure 13. Supply Air Distribution Plenum.