Technical Data Manual

Design of Mini VRF SYSTEM
2 - 45
1
8
7
6
5
4
3
2
7. Optional Parts
7-1. Distribution Joint Kits
CZ-P160BK1U (for R410A)
How to Attach Distribution Joint
1. Accompanying Parts
2. Distribution Joint Kits (with insulation)
3. Making Branch Connections
Check the contents of your distribution joint kit.
B
B
B
C
C
C
C
E
D
ED
Parts Kit 2Parts Kit 1
Insulation Insulation
Distribution
Joint
Distribution
Joint
A
C
A
D
4-21/64
3-13/16
unit : inch unit : inch
2-53/64
2-53/64
4-21/64
3-13/16
Size mm Inch
Part A
Part B
Part C
Part D
Part E
1/2
5/8
3/8
3/4
1/4
Size of connection point on each part
(Shown are inside diameters of tubing)
o19.05
o15.88
o12.7
o9.52
o6.35
Straight tubing 5-15/16" or larger
15 to 30
upward slant
Outdoor unit
Side
Indoor unit
Side
In case of horizontal position
In case of vertical position
(directed upward)
Fig. 2-32
Fig. 2-33
Fig. 2-31
Stopper(boss)
Cutting point
Insertion length of the
connecting tube
Make space as long as possible
.
NOTE
For branching tubes, install 5-15/16" or larger (including reducer)
straight tubing up to the point where the tube branches
(or after the point where the tubes join together). (Fig. 2-31)
Using a tube cutter, cut the joints at the diameter required to match
the outside diameter of the tubing you are connecting.
(This is usually done at the installation site.)
The tube diameter depends on the total capacity of the indoor unit.
Note that you do not have to cut the joints if it already matches the
tubing end size. For size selection of the tube diameter, refer to the
installation instructions provided with the outdoor unit.
Avoid forceful cutting that may harm the shape of the joints or tubing.
(Inserting the tubing will not be possible if the tube shape is not proper.)
Cut off as far away from stopper as possible. (Fig. 2-32)
After cutting the joints, be sure to remove burrs on the inside of the
joints. (If the joints have been squashed or dented badly, reshaped
them using a tube spreader.)
Make sure there is no dirt or other foreign substances inside the
distribution joint.
The distribution joint can be either horizontal or vertical. (Fig. 2-33)
In the case of horizontal, the L-shaped tubing must be slanted slightly
upward (15 to 30 ).
When brazing a pipe E to the reducer of which middle pipe inner
dimension is D as shown above chart, cut the middle pipe as long as
possible so that the pipe E can be inserted.
When brazing, replace air inside the tube with nitrogen gas to prevent copper oxide from forming.
To insulate the distribution joint, use the supplied tubing insulation. (If using insulation other than that supplied,
make sure that its heat resistance is 248 F or higher.)
For additional details, refer to the installation instructions provided with the outdoor unit.
TD831156-00_MINI_VRF_SYS.indb 45TD831156-00_MINI_VRF_SYS.indb 45 2012/01/31 14:38:512012/01/31 14:38:51