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6
ALTERNATIVE REFRIGERANT
R410A
The refrigerant R410A has the property of higher operating pressure in
comparison with R22.
Therefore, all materials have the characteristics of higher resisting
pressure than R22 ones and this characteristic should be also consid-
ered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone
depletion potential (ODP) of R410A is 0.
!
CAUTION
• The wall thickness of the piping should comply with the relevant
local and national regulations for the designed pressure 3.8MPa
• Since R410A is a mixed refrigerant, the required additional
refrigerant must be charged in its liquid state.
If the refrigerant is charged in its gaseous state, its composition
changes and the system will not work properly.
• Do not place the refrigerant container under the direct rays of
the sun to prevent it from exploding.
• For high-pressure refrigerant, any unapproved pipe must not be
used.
• Do not heat pipes more than necessary to prevent them from
softening.
• Be careful not to install wrongly to minimize economic loss
because it is expensive in comparison with R22.
SELECT THE BEST LOCATION
Select space for installing outdoor unit, which will meet the following
conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying neighbors by noise from unit
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space
where generation, inflow, stagnation, and leakage of combustible
gas is expected.
• Avoid unit installation in a place where acidic solution and spray (sul-
fur) are often used.
• Do not use unit under any special environment where oil, steam and
sulfuric gas exist.
• It is recommended to fence round the outdoor unit in order to pre-
vent any person or animal from accessing the outdoor unit.
• If installation site is area of heavy snowfall, then the following direc-
tions should be observed.
- Make the foundation as high as possible.
- Fit a snow protection hood.
• Select installation location considering following conditions to avoid
bad condition when additionally performing defrost operation.
- Install the outdoor unit at a place well ventilated and having a lot of
sunshine in case of installing the product at a place With a high hu-
midity in winter (near beach, coast, lake, etc.)
(Ex : Rooftop where there is always sunshine.)
INSTALLATION SPACE
Individual Installation
During the installation of the unit, consider service, inlet, and outlet
acquire the minimum space as shown in the figures below.
Category
Installation Space
B
B
A
C
B
A
C
B
D
A
C
B
D
A
C
B
A
D
C
B
B
B
A
C
D
B
A
E
E
B
A
D
C
B
A
C
A
E
E
D
A
B
C
D
A
E
E
D
B
D
D
A
E
E
B
D
D
A
B
E
E
B
B
A
E
E
D
B
A
E
C
B
D
A
E
E
B
A
E
E
A
E
C
D
B
A
E
E
F
A
E
C
D
B
D
F
A
E
C
B
D
A
F
E
C
B
B
A
E
C
F
D
4 sides
B
A
F
E
C
A
E
C
D
F
are
A
E
C
D
B
F
F
D
B
walls
A
E
C
F
D
B
A
E
C
D
B
F
A
E
C
D
B
D
F
A
E
C
B
D
A
E
F
C
B
B
A
E
C
F
D
B
F
A
E
C
A
E
D
C
F
A
E
C
D
B
F
F
D
B
A
F
E
C
D
B
A
E
C
D
B
F
A
E
C
D
B
D
F
A
E
C
B
D
A
F
E
C
B
B
A
E
C
F
D
B
F
A
E
C
A
E
C
D
F
A
E
C
D
B
F
F
D
B
A
F
D
B
A
D
B
A
D
B
D
A
D
B
A
B
B
B
A
B
B
Only 2
A
E
E
A
B
A
A
E
E
A
sides
B
A
E
E
B
are
A
E
E
B
A
E
E
B
walls
B
A
E
E
B
A
E
E
A
E
E
A
E
E
• The height of the wall on the front side
h1
must be 1500mm or less.
• The height of the wall on the inlet side
A
h2
must be 500mm or less.
B
Limita-
• There is no limit to the wall on the side.
tions on
• If the height of the walls on the front
the
and the side are higher than the limit,
height
45° or
there must be additional space on the
of the
more
front and the side.
wall
240 or
more
(Refer
- Additional Space on the front side by
to 4 side
1/2 of h1.
walls)
- Additional Space on the inlet side by
1/2 of h2
- h1 = A(Actual height) - 1500
50 or more
- h2 = B(Actual height) - 500
Seasonal wind and cautions in winter
• Sufficient measures are required in a snow area or severe cold area
in winter so that product can be operated well.
• Get ready for seasonal wind or snow in winter even in other areas.
• Install a suction and discharge duct not to let in snow or rain.
• Install the outdoor unit not to come in contact with snow directly. If
snow piles up and freezes on the air suction hole, the system may
malfunction. If it is installed at snowy area, attach the hood to the
system.
Case 1
Case 2
(10mm≤Si d e Space≤49mm)
(Side Space≥49mm)
A≥10
A≥50
B≥300
B≥100
C≥10
C≥50
D≥500
D≥500
A≥10
A≥50
B≥300
B≥100
C
C≥10
C≥50
C
C
D≥500
D≥500
C
E≥20
E≥100
C
C
C
C
A≥10
A≥50
C
B≥300
B≥100
C≥10
C≥50
D≥500
D≥500
E≥20
E≥100
F≥600
F≥500
A≥10
A≥50
B≥300
B≥100
C≥10
C≥50
D≥300
D≥100
E≥20
E≥100
F≥500
F≥500
A≥10
A≥50
B≥500
B≥500
C≥10
C≥50
D≥500
D≥500
E≥20
E≥100
F≥900
F≥600
A≥10
B≥300
A≥200
B≥300
E≥400
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