Panasonic U-100PEY1E5, Technical Data & Service Manual, Page: 313 / 739

1
1-303
Tubing Size
(A) Single type
Refrigerant tubing between the indoor and outdoor units should be kept as short as possible.
The lengths of the refrigerant tubes between the indoor and outdoor units are limited by the elevation difference
between the 2 units. During tubing work, try to make both the tubing length (L) and the difference in elevation (H1)
as short as possible.
H1
Single
Main tubing L
Outdoor unit type
U-50PE1E5
U-60PEY1E5
U-71PEY1E5
Maximum allowable
tubing length
40 m 50 m
Charge-less tubing
length
(actual length)
3 – 30 m 3 – 20 m
Additional charge per 1 m 20
g
40
g
(B) Simultaneous operation multi (Twin)
N OT E
Because the indoor units run simultaneously, install them within the same room.
Table 1-1
Contents m e t I
Symbol Actual length (m)
Single Twin 50
60 – 71
single
71
twin
Allowable
tubing
lengths
Maximum
allowable
tubing length One-way length of tubing
from outdoor unit to the most
distant indoor unit
L
L + 1
L + 2
40 50 40
Maximum
distribution
tubing length Maximum length following
the first branch point (No. 1
distribution)
– 1, 2
15
Maximum branch tubing
length
Difference between the
maximum length and
minimum length in tubing
following the first branch point
–
1 > 2
1 – 2
10
Maximum difference between lengths of No. 1 distribution
tubing (double twin)
–
–
–
Maximum difference between lengths of No. 2 distribution
tubing (double twin)
–
– – –
–
–
–
– –
– –
–
–
–
Maximum
allowable
height
difference
Maximum
indoor-
outdoor height
difference
If outdoor unit is higher
H1
30 30 30
If outdoor unit is lower 15 15 15
Maximum height difference between indoor units H2 0.5
* For connection tubing sizes, refer to Table above.
1
2
H1
H2
Twin
CZ-P155BK1
Main
tubing L
Distribution joint
N OT E
For refrigerant tube branches, use the optional distribution joints.
For cautions on the use of the optional distribution joints, be sure to
refer to the provided instruction sheet.
Also, be careful to install them in the correct direction (orientation).
SM830211-07̲PAC-i.indb 303 SM830211-07̲PAC-i.indb 303 2013/09/17 22:48:01 2013/09/17 22:48:01