61
6-7. Concealed Duct High Static Pressure Type
Duct design
1. In order to prevent short circuits, design the duct
work so that the intake and discharge openings
are not adjacent to each other.
2. The indoor unit does not have a built-in air filter.
Always install the air filter (Local procure) in a
location that permits easy maintenance, such as
behind the intake grille. (If no air filter is installed,
dust will collect in the heat exchanger, which may
cause the air conditioner to fail or to leak.)
<Air supply connecting flange>
<Overview of duct connection>
NOTE : Parts except air conditioner unit are to be
locally procured.
<Air return connecting flange>
Canvas joint Canvas joint
(Air conditioner)
Air filter
Air supply port
Silencer chamber
Silencer
chamber
Check port
Air inlet
8-Ø8 hole
4-Ø8 hole
6-Ø8 hole
8-Ø8 hole
6-Ø8 hole
MMD-AP0361H
MMD-AP0181H to AP0241H
MMD-AP0481H
MMD-AP0181H to AP0361H
MMD-AP0481H
25 25
25 275
550
275 25
25 25290
316 1212
25 25
12
400
426 12
25 25
200
226
12
12
25 25
12
670
348
348 12
25 25
200
226
12
12
25 25
12
770
316
164 316 12
25 25
200
226
12
12
25 25
25 300
300 300
900
25
25 25290
316 1212
MMU-AP0721H to AP0961YH
65 65 65 65 65
1080
(I/D)
1080
(I/D)
25
25
10
65 6565 65 65 65 65 65 65 65 65 65
<Return air side connecting flange>
<Air supply side connecting flange>
65 65 65 65 65
1080
(I/D)
1080
(I/D)
25
25
10
65 6565 65 65 65 65 65 65 65 65 65
REQUIREMENT
If the air conditioner unit and the canvas joint are connected with the rivets, the fan and the refrigerating cycle
become unavailable to be checked. Be sure to use the bolts for tightening the flange.
(Fixing bolts M6 × 12 Field-supplied)
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