OPTIONAL PARTS
TC-17005-rev.1
3-5
3.5 Fresh Air Intake Kit: OACI-160K3
Specifications
Model
Item
OACI-160K3
Applicable Indoor Unit Model
((H,Y,C)IC4**B21S)
MBH
008 to 048
Material
Polyethylene, Galvanized Steel Plate, EPDM-FO, Polystyrene
Color of Frame
Bluish Gray
Weight
lbs (kg)
5.1 (2.3)
Applicable T-Tube Connecting Kit (Option)
TKCI-160K
NOTES:
1. This kit cannot supply fresh air without connecting a duct from a dedicated outside air system or duct fan.
2. When using this kit with the dedicated outside air system, the maximum fresh air intake volume should be
within 20% of the rated airflow volume of the indoor unit. In addition, when using this kit without the dedicated
outside air system, care should be taken to not cause condensation inside this kit, the duct, and indoor unit.
3. The total height of the unit is increased by approximately 2-3/16 inches (55mm) when the fresh air inlet kit is
installed. Pay attention to the amount of space needed for installation.
4. When fresh air is taken from one side, cover the gap with insulation for the other side to prevent air leakage
and condensation.
5. Air flowing through the duct does not pass through the air filter of the indoor unit. Therefore, install an air filter
(field-supplied) at the supply side of the fresh air.
6. Insulate the duct and the duct connection (including the plate band and the T-tube connection).
The materials for the duct and the insulation should be nonflammable.
7. The curve “Pass Resistance of Fresh Air Intake Portion” shows the value when the kit is used by itself. If the
kit is installed along with the T-tube connecting kit, refer to the “T-Tube Connecting Kit” for details.
8. Refer to the “Installation Manual for Fresh Air Intake Kit” for installation details.
6-7/8
[174]
3-1/8 [80]
Connecting Box
(Accessory)
Flange Ø2-15/16 [75]
(Accessory)
13/16 [20]
1-15/16 [50]
2-3/16 [55]
(Height of Filter Box)
3/8 [10]
(Before Compression)
Insulation
(EPDM)
Insulation
(Polyethylene)
Galvanized Steel Plate
(1-7/16)
([37])
27-9/16 [700]
(Decorative Panel Mounting Position)
(Decorative Panel Mounting Position)
Mounting Hook
(4 Places)
30-1/2 [775]
(1-7/16) ([37]
)
33-7/16 [850]
27-9/16 [700]
Polystyrene
34-15/16 [887]
33-7/16 [850]
Min. 3/
8
[10]
a
Decorative Panel
(Option)
Air Inlet Grille
(Attached with Decorative Panel)
6-1/
8
[155]
b
3/16 [5
]
(After Compression)
33-1/16 [840]
Insulation
2-3/16 [55]
1-15/16 [50]
Ø2-15/16 [75]
(Dimension for Opening)
35-13/16 to 36-1/4 [910 to 920]
(Dimension for Opening
)
(3-3/8 [85])
1-9/16 [40]
29-15/16 [760
]
Ø2-15/16 [75]
Ø2-15/16 [75]
33-1/16 [840
]
29-15/16 [760]
27-3/4 [705]
33-1/16 [840]
33-7/8 to 35-13/16 [860 to 910]
1/2 [12]
Ceiling
Fresh Air
Intake Kit
Electrical Control Box
T-Tube Connection
Kit Ø2-15/16 [75]
(Option)
Flexible Duct
Ø5-7/8 [150]
(Field-Supplied)
AIR FLOW
AIR FLOW
Indoor Unit Side
Decorative Panel Side
P
Dedicated Outside
Air System
Fresh Air
Indoor Unit
View from P
Fresh Air
Dedicated Outside
Air System
Side View
If this dimension is
1-9/16 inches [40mm] or less,
the ceiling slab will interfere with
the connecting box.
Installation State
Dimensional Data
(*1)
(*2)
Air Volume (cfm)
25
50
75
100 125 150
0
05
0
200 250 300
100 150
0.05
0.10
0.15
0.20
0.25
0
Pass Resistance of
Fresh Air Intake Portion
*1) Installation of the connecting box at one side.
*2) Installation of the connecting box at both side.
Pass Resistance (in.WG)
036 MBH Model
Limit of Fresh Air
Intake Amount
Unit: inch [mm]
Dimension
Indoor Unit
a
b
008 to 018 MBH
11-7/16 [291]
9-5/16 [236]
024 to 048 MBH
13-7/16 [341]
11-1/4 [286]
