1-43
1
1
Chec
2.
k of limit density
When installing an air conditioner in a room, it is
necessary to ensure that even if the refrigerant gas
accidentally escapes, its density does not exceed the
limit level.
If the density might exceed the limit level, it is
necessary to set up an opening between it and the
adjacent room, or to install mechanical ventilation
which is interlocked with a leak detector.
(Total refrigerant charged amount: k
g
)
(Min. indoor volume where the indoor unit is installed: m³)
< Limit density 0.44 (k
g
/m
3
)
The limit density of refrigerant which is used in this
unit is 0.44 k
g
/m
3
(ISO 5149).
The shipped outdoor unit comes charged with the
amount of refrigerant fi xed for each type, so add it
to the amount that is charged at the fi eld. (For the
refrigerant charge amount at shipment, refer to the
unit’s nameplate.)
Minimum indoor volume & fl oor area relative to the
amount of refrigerant are roughly as given in the
following table.
Pay special attention to any
location, such as a basement
or recessed area, etc. where
leaked refrigerant can
collect, since refrigerant gas
is heavier than air.
10
13.5
27.0
40.5
54.0
67.5
81.0
94.5
108
121.5
135
5
10
15
20
25
30
35
40
45
50
m
3
m
2
20
30
40 k
g
Min.
indoor
fl
oor area
(when the ceiling is 2.7 m high)
Total amount of refrigerant
Range below
the density limit
of 0.44 k
g
/m
3
(countermeasures
not needed)
Range above
the density limit
of 0.44 k
g
/m
3
(countermeasures
needed)
Min.
indoor v
olume
CAUTION
SELECT THE OUTDOOR UNIT INSTALLATION LOCATION
Air Intake
Strong wind
Intake side
Wall / Standing outer wall
Strong wind
Selecting the location for installation and service.
1. Install the unit once you have checked that the installation location matches the following conditions.
A location with suffi cient ventilation.
Possibly a location that is sheltered from rain or direct sunlight and is well-ventilated so that hot and cool air does not build
up.
A location where the area around the discharge is not exposed to animals or plants which could adversely affect the release
of hot or cool air from the unit.
A location where the discharge and operation noise will not be a nuisance to the neighbours.
A location that can support the product’s weight or vibrations and secured for horizontal installation wherever possible.
A location that does not obstruct the air discharge or intake.
A location where there is no danger of fl ammable or corrosive gas leaks.
A location that provides space for installation and service.
A location that allows the pipe and cable length fi xture for internal and external connections.
It may need two or more people to carry out the installation work.
2. Refer to the diagram below for the installation location which is exposed to strong wind.
If a strong wind of more than 5 m/sec blows to the area directly in front of the discharge, the outdoor unit’s air fl ow is reduced
and the outfl ow may re-enter (short circuit) causing the following outcome:
“Reduced capacity”, “Increased frost formation during heating” or “Operation stopped due to increased pressure”.
Should an exceptionally strong wind blow to the area directly in front of the discharge of the outdoor unit; there is the risk of
damage due to the fan’s high-speed reverse rotation.
If the direction of the prevailing wind is known when operating the unit, place the unit at an appropriate angle to the wind’s
direction so that the discharge faces towards a building or a wall.
3. If installing at locations prone to snowfall, install the unit as high as possible with suitable roofi ng which shelters the
unit from snow.
4. Avoid installing the unit in locations where there are petroleum products (such as machine oil), saline content (such as
coa areas), sulphurous gas and where high frequency noise is generated.
5. Place the indoor and outdoor unit, power cords and indoor/outdoor unit connection cables at a minimum distance of 1
meter or more away from televisions and radios. This is to avoid interference to picture and/or sound.
(However, depending on the electromagnetic waves, noise interference may still occur even with the 1 meter separation.)
6. For restaurants and kitchens, avoid installing at locations which draws oil and steam.
Plastic parts can deteriorate from droplets of oil and steam or it can cause falling parts or water
7. Avoid installing at the location where cutting oil mist or iron powder is present.
8. If there is an immense voltage fl uctuation due to the location’s problem, ensure to split the power
9. When installing the product in a place where it will be affected by typhoon or strong wind such as
wind blowing between buildings, including the rooftop of a building and a place where there is no
building in surroundings, fi x the product with an overturn prevention wire, etc.
10. Ensure to assign several people or use a mechanical lift, etc. to transport the unit.
WARNING
Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your
knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fi ns on the air conditioner
can cut your fi ngers.
leakage.
supply.
The following parts are supplied as accessories with each outdoor unit. Check that all accessory parts are present before
installing the outdoor unit.
3. SELECTING THE INSTALLATION SITE
Part name
Diagram
Quantity
Joint piping A (ø19.05
→
ø25.4)
*1
1
Joint piping B (ø19.05)
*1
1
Installation instruction (electrical
work/test run edition)
A2 double-sided
printing (pamphlet)
1
*1: U-200PE2R8A, U-224PE2R8A only.
Part name
Diagram
Quantity
Protective bushing
(for protecting electrical wires)
2
Banding strap
(for tying electrical wires together)
4
Installation Instruction
This manual
1
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