Panasonic S-22MU1E5A Technical Data Manual page 60

4. Optional Parts
CZ-P1350BK2 (for R410A)
How to Attach Distribution Joint
1. Accompanying Parts
Check the contents of your distribution joint kit.
2. Distribution Joint Kits (with insulation)
Distribution
Joint
A
B
D C
1
Insulation
3. Making Branch Connections
For branching tubes, install 150mm or larger (including reducer)
straight tubing up to the point where the tube branches
2
(or after the point where the tubes join together). (Fig. 2-148)
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.)
3
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.
NOTE
4
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. 2-149)
After cutting the joints, be sure to remove burrs on the inside of the joints.
5
(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.
6
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 120 C or higher.)
7
For additional details, refer to the Installation Instructions provided with
the outdoor unit.
8
9
Parts Kit 1
unit : mm
175
135
A
B
C D
B
C
D
E
F
G
Reducing
H
Joints
Part Name
Distribution Joints
Insulations
Reducing Joints
Parts Kit 2
unit : mm
110
97
F
G
F
H
G
G
Distribution
Joint
H
I
J
Reducing
Joints
Insulation
2-52
Design of VRF SYSTEM
Parts Kit 1 Parts Kit 2
1 1
1 1
7 4
Size of connection point on each part
(Shown are inside diameters of tubing)
Size mm
Part A o38.1
Part B o31.75
Part C o28.58
Part D o25.4
Part E o22.22
Part F o19.05
Part G o15.88
Part H o12.7
Part I o9.52
Part J o6.35
Straight tubing 150mm or larger
Stopper(boss)
Cutting point
Make space as long as possible.
Insertion length of the
connecting tube
Inch
1-1/2
1-1/4
1-1/8
1
7/8
3/4
5/8
1/2
3/8
1/4
Fig. 2-148
Fig. 2-149