13
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
Maxim
u
m i
n
door-o
u
tdoor
hei
g
ht differe
n
ce
If o
u
tdoor
un
it i
s
hi
g
her
If o
u
tdoor
un
it i
s
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
