Dometic MCS15 - Manual (Page 21)

EN
21
MCS5, MCS15 Installation
➤ 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.
8.7 Ducting
The following guidelines should be followed during the installation of the
ducting:
 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.
The following is a summary of proper ducting connections:
➤ 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.
➤ Wrap duct tape around the ducting and ring joint to prevent any air
leaks.
➤ Pull the insulation back up over the mylar to the ring and tape this joint.
➤ Run the ducting to the other end, keeping it as straight, smooth, and
taut as possible.
➤ Remove excess ducting.
➤ Use the same connection method at the other end.