Panasonic Inverter R32 Series Technical Data & Service Manual page 105

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(D) When outdoor units are stacked
Only two outdoor units can be stacked.
For drain treatment, a space of at least 400 mm is required between the upper and lower outdoor units.
Close the area A (gap between the upper outdoor unit and lower outdoor unit) so that the outlet air does not bypass there.
(1) Obstruction on the air outlet side
Area A
(E) When outdoor units are installed in rows, such as on a rooftop (L < H)
(1) One outdoor unit installed in each row
L
(2) Two or more units installed side by side.
H
In case of multiple installations
● Concrete block foundation should be used and well drained.
Be sure that the foundation height is kept at least more than
50 mm from the ground.
● Base leg should be fixed by inserting the flat washer (field
supply) and single nut (field supply) onto the anchor bolt
(M8, field supply). Protrusion length of anchor bolt should be
13 mm or less and fastening height of nut should be 12 mm
or less.
Note: If the anchor bolt is longer and the fastening height of
nut is higher, the front panel may be damaged when
installing or removing it.
● Use lug bolts or equal to bolt down unit, reducing vibration
and noise.
a 500 mm or more
b 400 mm
b
a 500 mm or more
H
b 300 mm or more
c 1,000 mm or more
d 50 mm or more
L
a 1,000 mm or more
b 400 mm or more
c 2,000 mm or more
d 250 mm or more
e 250 mm or more
(2) Obstruction on the air inlet side
Area A
The dimensional relationship between H, A, and L is as shown
in the following table.
L ≤ H
H < L Installation is not allowed.
The values described above are the least space to optimize
application performance.
If any service area is needed for service according to field
circumstance, obtain enough service space.
Air discharge
Anchor bolts
(4 pieces)
13 mm or less
(Protrusion length of anchor bolt)
12 mm or less
(Fastening height of nut)
1-11-4
a 200 mm or more
b 400 mm
b
Unit: mm
A
150
Air intake
Air intake
Min. 150 mm