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ENGLISH 9
Peterbilt 379 Installation Guidelines
Figure 6 - Location for cutting return air vent
Figure 7 - Return air vent hole cut
INSTALLING THE RETURN AIR VENT
The supplied return air vent(s) should be installed
under the bunk, in the same area where the CHEB
will be mounted. Your package may contain either
one large grill with a mounting frame or two smaller
12.5" x 5.5" surface-mount grills. We suggest using a
hole saw and reciprocating saw to cut out the hole for
the large grill. If you received the two 12.5" x 5.5" grills
instead of the one large grill, use a 4" hole saw to cut
at least two holes behind each grill. Use of the recip-
rocating saw is optional for those grills (Figs. 6-8).
Remember, good air flow from the return air grill
to the CHEB evaporator coil is critical for your
air conditioning system to perform correctly. Do
not allow anything to block this air flow.
Figure 8 - Return air grill ange installed