Carrier 38MGQ Installation Instructions Manual page 25

AIR SUPPLY DUCT INSTALLATION
1. Installation of the Rectangular Air Supply Duct
1
2
3
Return air
4 5 6
Fig. 54 --- Installation of Air Duct Supply
Table 19—Air Duct
NUMBER NAME
1 Hanger
Return Air
2
Duct
3 Canvas Duct
Return Air
4
Heat
INSTALL THE ROUND AIR SUPPLY DUCT
1
2
4 5
3
Fig. 55 --- Air supply duct
Table 20—Air Duct
NUMBER NAME
Return Air
1
Duct
2 Canvas Duct
Return Air
3
Louver
4 Hanger
Air Supply
5
Duct
Return air
Supply air
3 7 8
NUMBER NAME
5 Plenum Box
6 Filter Screen
Main Air
7
Supply Duct
Air Supply
8
Outlet
6 7
8 9
NUMBER NAME
6 Transition Duct
Air Supply
7
Duct
8 Diffuser
9 Diffuser Joint
ROUND AIR SUPPLY DUCT INSTALLATION STEPS
1. Pre- -install the outlet of the round duct on the transition duct
and then secure it with the tapping screw.
2. Place the transition duct to the air outlet of the unit and
secure it with a rivet.
3. Connect the outlet to the duct and then tighten them with
tape. Other installation details are not covered herein.
CAUTION
!
S The max. length of the duct means the max. length of the air
supply duct plus the max. length of the return air duct.
S The duct is either rectangular or round and connected with
the air inlet/outlet of the indoor unit. Among all air supply
outlets, at least one should remain open. As for the round
duct, it needs a transition duct of which the size should
match with the air supply of the unit. After the fitting of the
transition duct, it is best to keep the round duct 32 ft. (10m)
away from the corresponding diffuser.
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