Technical data

1. Specifications
1
2
3
4
5
I-99
1-11 Installation Instructions
Tubing Length
(A) 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 two units.
During tubing work, try to make both the
tubing length (L) and the difference in eleva-
tion (H) as short as possible. Refer to Table
1-1 for the details.
Tubing length (L)
INDOOR
UNIT
OUTDOOR
UNIT
Elevation difference (H)
0419_M_I
Installation Example 1
Limit of elevation
difference between
the two units
Table 1-1 (R407C Models)
No additional charge of compressor oil is necessary.
*
1
If total tubing length becomes 30 to 50 m, charge additional refrigerant (R407C) by a) 45 or b) 50 g/m.
Models AER 425 S(C/H)LE
AER 436 S(C/H)L3E AER 448 S(C/H)L3E
Tubing Data AER 425 S(C/H)L3E
Tubing size Narrow tube mm (in.) 6.35 (1/4) 9.52 (3/8) 9.52 (3/8)
outer diameter Wide tube mm (in.) 15.88 (5/8) 19.05 (3/4) 19.05 (3/4)
Limit of tubing length (m) 50 50 50
Outdoor unit is placed
50 50 50
upper (m)
Outdoor unit is placed
30 30 30
lower (m)
Max. allowable tubing length at shipment (m) 30 30 30
Required additional refrigerant *
1
(g/m) a) 45 b) 50 b) 50
Refrigerant charged at shipment (kg) 3.2 4.0 4.5