Dometic MCS5 Notice De Montage page 21

_IA_MCS.book Seite 21 Mittwoch, 28. Januar 2009 9:06 09
MCS5, MCS15
8.6 Return-air Grille
The following guidelines should be followed during the installation of the
return-air grille to ensure direct uninterrupted airflow to the evaporator:
8.7 Ducting
The following guidelines should be followed during the installation of the
ducting:
The following is a summary of proper ducting connections:
Install the return-air grille as low and as close to the unit as possible.
Install the return-air grille away from exhaust and bilge vapors.
The return-air grille should have a minimum of 107 mm of clearance
in front of it in the cabin area.
Create the cut out for the return-air grilles according to the following
table:
MCS5
9.6 x 7.6"
244 x 194 mm
If your kit is supplied with a filtered return-air grille: Remove the filter
attached to the unit's evaporator and discard it.
Two filters are not better than one, as the reduced air flow will
decrease performance and possibly freeze the evaporator coil.
Mount the return-air grille.
The ducting should be run as straight, smooth and taut as possible.
Avoid any unnecessary bends and loops.
Minimize the number of 90° bends (two tight 90° bends can reduce air-
flow by 25 %).
Ensure the ducting is properly connected with no excess.
Start at either end (the air-discharge grille or the air conditioning unit).
Pull back the fiberglass insulation exposing the inner mylar duct hose.
Slide the inner mylar duct hose around the mount ring until it bottoms
out.
Screw 3 or 4 stainless steel sheet metal screws through the duct hose
into the transition ring.
Make sure to catch the wire in the duct hose with the heads of the
screws.
Do not use band clamps, as the hose will slide off.
MCS15
13.6 x 9.6"
346 x 244 mm
Installation
21