English
4
4.
The refrigerant R410A itself is nontoxic, nonflammable and is
safe. If the refrigerant should leak however, its concentration
may exceed the allowable limit depending on room size. Due to
this it could be necessary to take measures against leakage.
See
“14. CAUTION FOR REFRIGERANT LEAKS”
for details.
4.
INSPECTING AND HANDLING THE UNIT
•
At delivery, the package should be checked and any damage
should be reported immediately to the carrier claims agent.
•
When handling the unit, take into account the following:
1.
Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor damage.
2.
Decide on the transportation route.
3.
If a forklift is to be used, insert the arms into the lower side.
(Refer to figure 4)
4.
If hanging the unit, use a cloth sling to prevent damaging the unit.
Keeping the following points in mind, hang the unit following the
procedure shown in figure 5.
•
Use a sling sufficiently strong to hold the mass of the unit.
•
Use 2 belts of at least 8m long.
•
Place extra cloth or boards in the locations where the casing
comes in contact with the sling to prevent damage.
•
Hoist the unit making sure it is being lifted at its center of gravity.
(Refer to figure 4)
1.
Fork
(Refer to figure 5)
1.
Belt sling
2.
Filler cloth or Board
3.
Hole (small)
Note
•
Apply a filler cloth on a fork to prevent coating of the bottom frame
from coming off and rust from occurring when bringing the unit
using a forklift.
•
Insert the arms even the tip of arms come out fully from opposite
side.
5.
PLACING THE UNIT
•
Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
(Refer to figure 6)
•
The base should support the unit with the extent larger than
hatched area in figure 7.
If protective rubber is to be attached, attach it to the whole face of
the base.
•
The height of the base should be at least 150mm from the floor.
•
Secure the unit to its base using foundation bolts. (Use four com-
mercially available M12-type foundation bolts, nuts, and washers.)
•
The foundation bolts should be inserted 20 mm.
(Refer to figure 6)
1.
Independent base (four corner type)
2.
Independent base (with center support type)
3.
Beam base (Horizontal)
4.
Beam base (Vertical)
5.
Center of the product
(Refer to figure 7)
1.
4-15×22.5 (Hole for foundation bolt)
2.
(Depth of product)
3.
(Inner dimension of the base)
4.
(Outer dimension of the base)
Note
•
When installing central drain pan kit (optional accessory), con-
struct the bace by independent base (with center support type) or
beam base (Horizontal) in figure 6.
•
There are restrictions on the refrigerant pipe connecting order
between outdoor unit in the case of the multi system.
See
“2-1 Combination”
for detail.
•
When installing on a roof, make sure the roof floor is strong
enough and be sure to water-proof all work.
•
Make sure the area around the machine drains properly by setting
up drainage grooves around the foundation.
Drain water is sometimes discharged from the outdoor unit when
it is running.
•
For anti-corrosion type, use nuts with resin washers. If the paint on
nut connections comes off, the anti-corrosion effect may decrease.
6.
REFRIGERANT PIPING
Note
•
All field piping must be installed by a licensed refrigeration techni-
cian and must comply with relevant local and national regulations.
•
After piping work is complete, do not under any circumstances open
the shutoff valve until
“7. FIELD WIRING”
and
“10. CHECKING OF
DEVICE AND INSTALLATION CONDITIONS”
are complete.
•
Do not use flux when brazing the refrigerant piping. Use the phos-
phor copper brazing filler metal (BCuP-2 : JIS Z 3264, B-Cu93P-
710/795 : ISO 3677) which does not require flux.
(Flux has extremely harmful influence on refrigerant piping sys-
tems. For instance, if the chlorine based flux is used, it will cause
pipe corrosion or, in particular, if the flux contains fluorine, it will
damage the refrigerant oil.)
6-1 Selection of piping material and Refrigerant
branching kit
•
Use only pipes which are clean inside and outside and which do
not accumulate harmful sulfur, oxidants, dirt, cutting oils, mois-
ture, or other contamination. (Foreign materials inside pipes
including oils for fabrication must be 30mg/10m or less.)
•
Use the following items for the refrigerant piping.
Material
: Jointless phosphor-deoxidized copper pipe
Size
: See
“6-5 Example of connection”
to determine the
correct size.
Thickness
: Select a thickness for the refrigerant piping which
complies with national and local laws.
For R410A, the design pressure is 4.0 MPa (40-bar).
The minimum thickness of piping according to Japan’s High-
Pressure Gas Safety Law (as of January 2003) is shown below.
Temper grade (O type, 1/2H type) in the table indicate the
material types specified in JIS H 3300.
(unit : mm)
(unit : mm)
•
For piping work, follow the maximum tolerated length, difference
in height, and length after a branch indicated in the “
6-5 Example
of connection
”.
•
Outdoor unit multi connection piping kit and refrigerant branching
kit (sold separately) are needed for connection of piping between
outdoor units (in case of multi system) and piping branches.
Use only separately sold items selected specifically according to
the outdoor unit multi connection piping kit, the refrigerant branch-
ing kit selection in the “
6-5 Example of connection
”.
6-2 Protection against contamination
when installing pipes
Protect the piping to prevent moisture, dirt, dust, etc. from
entering the piping.
Note
Exercise special caution to prevent dirt or dust when passing piping
through holes in walls and when passing pipe edges to the exterior.
20
Temper grade
O type
outer diameter
φ
6.4
φ
9.5
φ
12.7
φ
15.9
smallest thickness 0.80
0.80
0.80
0.99
Temper grade
1/2H type
outer diameter
φ
19.1
φ
22.2
φ
25.4
φ
28.6
φ
31.8
φ
34.9
φ
38.1
φ
41.3
smallest thickness
0.80
0.80
0.88
0.99
1.10
1.21
1.32
1.43
Place
Installation period
Protection method
Outdoor
More than a month
Pinch the pipe
Less than a month
Pinch or tape the pipe
Indoor
Regardless of the period
Resin washers
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