Tubing Size - Panasonic R410A Installation Instructions Manual

1-4. Tubing Size

Single type
Refrigerant tubing between the indoor and outdoor units
should be kept as short as possible.
The length 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. Refer to Table 1-2.
Table 1-1
Indoor unit type
Maximum length
Charge-less tubing length (actual length)
Additional charge per 1 ft.
Maximum indoor-outdoor
height difference
26, 36 types
165 ft.
10 – 100 ft.
If outdoor unit is higher
If outdoor unit is lower
8
Single
Main tubing L
42 type
165 ft.
15 – 100 ft.
0.43 oz.
H1 100
H1 50