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3.
The refrigerant R744 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 "Engineering Data" for details.
4.
When installing in a locations where there is heavy snowfall,
implement the following snow measures.
• Ensure the base is high enough that intakes are not clogged
by snow.
• Remove the rear intake grille to prevent snow from accumulat-
ing on the fins.
4.
HANDING THE UNIT
1.
Decide on the transportation route.
2.
If a forklift is to be used, pass the forklift arms through the large
openings on the bottom of the unit.
Hole (large)
Fork
Fixed screws of transportation clasp
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 the following figure.
• 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.
Belt sling
3.
After installation, remove the transportation clasp attached to the
large openings.
Note
Apply a filler cloth on a fork to prevent coating of the bottom frame
from coming off and rust from occurring when bringing in the unit with
anti-corrosion treatment type using a forklift.
5.
PLACING THE UNIT
• Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
• The base should be bigger around than the width of the unit's legs
(66 mm), and should support the unit.
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.
4
Transportation
clasp (yellow)
Belt sling
Board
Hole (small)
(Hole 40×30)
The product
Center of the
cannot be
product
supported with
four corners.
Base form
930
792
Base width and base bolt positions
Note
• 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.
6.
REFRIGERANT PIPING
To Piping Work Contractors
Do not use flux at the time of brazing and connecting refrigerant
pipes. Use phosphorous copper brazing filler metal (BCuP-2), which
does not require flux. Chlorine-based flux causes piping corrosion.
Furthermore, if fluoride is contained, the flux will have adverse influ-
ences on the refrigerant piping line, such as the deterioration of
refrigerating machine oil.
6-1 Selection of piping material and Refrigerant
branching kit
• Refer to the following table for pipe size section.
• The following types of refrigerant pipes are available.
Material: Phosphorus deoxidized seamless copper pipe (C1220T-
1/2H or C1220T-H)
Pipe wall thickness: Product withstanding 12.3 MPa
〈Pipe wall thickness examples〉
Pipe size
(Outer diameter)
φ6.4
φ9.5
φ12.7
φ15.9
• 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.)
• For piping work, follow the maximum tolerated length, difference
in height, and length after a branch indicated.
• The refrigerant branching kit sold as an optional accessory is
required for the branching of piping. Select the kit according to the
following "Refrigerant branch kit selection".
Center of the product
Foundation bolt point
(φ15 dia. : 4 positions)
(length: mm)
Material
Smallest thickness
1/2H
0.8
1/2H
1.0
1/2H
1.3
1/2H
1.8
English
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