Daikin VRV III REMQ72PBYD, Engineering Data

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Installation EDUS391004-N
50 Installation of Outdoor Units
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 27 ft 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.
5.
After installation, remove the transportation brackets (yellow)
attached to the large openings.
(Refer to figure 4)
(Refer to figure 4)
1. Packaging material
2. Forklift
3. Removal of shipping brackets
4. Shipping bracket (Remove the brackets by pushing the
hook.)
(Refer to figure 5)
1. Belt sling
2. Wear plate
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 5-7/8 in. from the floor.
• Secure the unit to its base using foundation bolts. (Use four
commercially available M12-type foundation bolts, nuts, and
washers.)
• The foundation bolts should be inserted 13/16 in..
(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. Foundation bolt point (

9/16 in. dia, : 4 positions)
2. (Depth of product)
3. (Inner dimension of the base)
4. (Outer dimension of the base)
NOTE
• 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
technician 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 phosphor
copper brazing filler metal (B-Cu93P-710/795 : ISO 3677) which does
not require flux.
(Flux has extremely negative effect on refrigerant piping systems. 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, moisture,
or other contamination. (Foreign materials inside pipes including
oils for fabrication must be 0.14 gr/10 ft 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 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
branching 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.
6-3 Pipe connection
• Be sure to perform nitrogen permutation or nitrogen blow when
brazing.
(Refer to figure 8)
Brazing without performing nitrogen permutation or nitrogen
blow into the piping will create large quantities of oxidized film
on the inside of the pipes, adversely affecting valves and
compressors in the refrigerating system and preventing normal
operation.
(Refer to figure 8)
1. Refrigerant pipe
2. Location to be brazed
3. Nitrogen
4. Taping
5. Handy valve
6. Regulator
Model A (in.) B (in.)
72P type 36-5/8 31-3/16
96 · 120P type 48-13/16 43-3/8
RXYQ144PBTJ 51-1/4 45-3/4
13/16 in.
Resin washers
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
3P215731-10R