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■ When used in rooms with high ceilings, it is recommended that a ceiling fan or
circulator be installed to improve air circulation and temperature variations within
the room.
■ The remote-control circuits under microprocessor control remain on at all
times whether the air conditioner is or is not in operation. For more economical
operation, it is recommended that the main power switch be turned off when the
air conditioner(s) is not used for long periods.
■ Avoid using air conditioning units in areas where they are exposed to oil or oily
smoke (cooking areas or machine shops). Oil which adheres to the heat
exchangers will cause reduced efficiency, generate mist and may damage plastic
components.
■ Avoid exposure to high-frequency waves as this may cause the microprocessor
to malfunction.
■ Rated noise levels were derived from tests in an anechoic test room. Noise
levels may therefore be greater depending on the surroundings, application,
and/or manner of installation.
■ Avoid using air conditioners in rooms with high humidity because excessive
condensation will occur as the air cools.
■ To avoid fire hazards, do not use air conditioners in areas where inflammable
gases are present.
■ Odours for buildings, cosmetics, perspiration, cigarette smoke, etc., may
accumulate in the heat exchanger and emanate from the air conditioner. This is
not indicative of mechanical trouble.
Obstacle at rear only Service space Top obstacles Obstacles at the right, left
and rear
Obstacles at the front and
rear only
Obstacle at the front and
rear only
■ Outdoor Unit Installation Location
• When installing a single outdoor unit:
• When installing many outdoor units:
PUH-2.5, 3 PUH-4,5,6
100mm or more 150mm or more
10mm or more 10mm or more
500mm or more 500mm or more
500mm or more
Service space
500mm or more
100mm or more 150mm or more
500mm or more 500mm or more
10mm or more 10mm or more
200mm or more 300mm or more
A
B
C
D
E
F
G
H
I
PUH-2.5, 3 PUH-4,5,6
10mm or more 10mm or more
Obstruction width: 1.5 times the width of
outdoor unit or smaller
Obstruction height: Unit height or lower
Air outlet guide
500mm or more 500mm or more
100mm or more 150mm or more
3000mm or more 3800mm or more
100mm or more 150mm or more
J
K
L
M
N
O
P
Q
Face-to-face arrangement
(with air outlet guides)
Face-to-face arrangement
(without air outlet guides)
Parallel arrangement
(with air outlet guides)
Parallel arrangement
(without air outlet guides)
Side-by-side arrangement
10mm or more 10mm or more
200mm or more 300mm or more
Up to 10 units (When the optional air outlet
guides are used, no more than five units should
be arranged side by side.)
1000mm or more 1000mm or more
PUH-2.5, 3 PUH-4,5,6
200mm or more 300mm or more
500mm or more 500mm or more
200mm or more 300mm or more
1200mm or more 1500mm or more
1000mm or more 1500mm or more
2000mm or more 2500mm or more
100mm or more 150mm or more
A
B
C
D
E
F
G
H
I
J
K
Precautions/recommendations concerning the installation and operation of Mitsubishi Electric Mr. Slim air conditioners.