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1-5. 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 1-10.
Table 1-9
Single
Main tubing L
H1
H1
H1
<
100
<
50
Maximum indoor-outdoor
height difference
If outdoor unit is higher
If outdoor unit is lower
Indoor unit type 26, 30, 36 types 42 type
Maximum length 165 ft. 165 ft.
Charge-less tubing length (actual length) 10 – 100 ft. 15 – 100 ft.
Additional charge per 1 ft. 0.43 oz.
07-115 SSHP_II 5/7/07 3:59 PM Page 13