Panasonic S-36MK2E5A - Page 61

2-53
Design of VRF SYSTEM
1
2
3
4
5
6
7
8
9
4. Optional Parts
CZ-P680PJ2, CZ-P1350PJ2 (for R410A)
How to Attach Distribution Joint
1. Accompanying Parts
2. Distribution Joint Kits (with insulation)
3. Making Branch Connections
NOTE
Check the contents of your distribution joint kit.
Size of connection point on each part (Shown are inside diameters of tubing)
Part A
1-1/8
o28.58
Part B
1
o25.4
Part C
7/8
o22.22
Part D
3/4
o19.05
Part E
5/8
o15.88
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.
Straight tubing 150mm or larger
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.
Size
mm
Inch 1-1/2
o38.1
o31.75
1-1/4
Part F
1/2
o12.7
Part G
3/8
o9.52
Part H
1/4
o6.35
Part I Part J
Stopper(boss)
Cutting point
Insertion length of the
connecting tube
Make space as long as possible.
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.
Fig. 2-151
Fig. 2-152
Fig. 2-153
Fig. 2-150
135kW or less
68kW or less
Capacity
CZ-P1350PJ2
CZ-P680PJ2
Model
Parts Kit Combination
Parts Kit 3
Parts Kit 3
Parts Kit 1
Parts kit 2
Insulation
Parts Kit 1
Reducing
unit : mm unit : mm unit : mm
Joints
Parts Kit 2 Parts Kit 3
Distribution
Joint
Insulation
Insulation
Distribution
Joint
Distribution
Joint
Reducing
Joints
Reducing
Joints
F
C
D
G
F
G
E
F
G
H
I
H
I
HI
D
D
B
B
B
A
C
A
D
C
D
E
C
FE
C
F
E
B
175
175
135
114
135
114
110
97
72
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 ).
Outdoor
unit
Side
Indoor
unit
Side
15 to 90ﾟ
upward
slant
In case of
horizontal position
In case of
vertical position
(directed upward)
Outdoor
unit
Direction of
Distribution Joint
Direction of Distribution Joint
Outdoor
unit
To Indoor unit
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