Panasonic S-22MU1E5A Technical Data Manual page 61

4. Optional Parts
CZ-P680PJ2, CZ-P1350PJ2 (for R410A)
How to Attach Distribution Joint
1. Accompanying Parts
Check the contents of your distribution joint kit.
2. Distribution Joint Kits (with insulation)
Parts Kit 1
175
135
B
A
B
B
Distribution
Joint
C
D
Insulation
Size of connection point on each part (Shown are inside diameters of tubing)
Size Part A
mm o38.1
Inch 1-1/2
3. Making Branch Connections
For branching tubes, install 150mm or larger (including reducer)
straight tubing up to the point where the tube branches
(or after the point where the tubes join together). (Fig. 2-150)
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.
NOTE
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. 2-151)
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. 2-152)
In the case of horizontal, the L-shaped tubing must be slanted slightly
upward (15 to 90 ).
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.)
For additional details, refer to the Installation Instructions provided with
the outdoor unit.
unit : mm
B
A
C D
D
Distribution
Joint
E
F
Reducing Reducing
Joints
Joints
Part B Part C Part D
o31.75 o25.4
o28.58
1-1/4 1-1/8 1
Model Capacity
CZ-P1350PJ2 135kW or less
CZ-P680PJ2 68kW or less
Parts Kit 2
unit : mm
175
135
C
E F
D
C
C
D
E
F
Insulation
Part E Part F
o22.22 o19.05 o15.88
7/8 3/4
Stopper(boss)
2-53
Design of VRF SYSTEM
Parts Kit Combination
Parts Kit 1 Parts Kit 3
Parts kit 2 Parts Kit 3
Parts Kit 3
110
97
G
G
E F
G
I H
Distribution
H
Joint
I
Insulation
Part G Part H Part I
o12.7 o9.52
5/8 1/2 3/8
Straight tubing 150mm or larger
Cutting point
Make space as long as possible.
Insertion length of the
connecting tube
15 to 90ﾟ
upward
Outdoor
slant
unit
Side
Indoor
unit
Side
In case of
horizontal position vertical position
(directed upward)
Direction of Distribution Joint
Outdoor Outdoor
unit unit
Direction of
Distribution Joint
unit : mm
H I
F
1
Reducing
Joints
Part J
2
o6.35
1/4
3
Fig. 2-150
4
5
Fig. 2-151
6
In case of
7
Fig. 2-152
8
To Indoor unit
Fig. 2-153
9