Installation Instructions; Outdoor Unit; Tubing Size - Panasonic Shows U-26PE1U6 Technical Data & Service Manual

1-12. Installation Instructions

Outdoor Unit

1. 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
Table 1-2 Tubing Data for Models
Tubing Data
Tubing size
outer diameter
Limit of tubing length
Limit of elevation
difference between
the 2 units
Max. allowable tubing length at shipment
Required additional refrigerant *
Refrigerant charged at shipment
No additional charge of compressor oil is necessary.
1
* If total tubing length becomes 100 to 165 ft., charge additional refrigerant by 0.43 oz./ft.
Table 1-3 List of Connection Tube Sizes
Type capacity of indoor units
Gas tube
Liquid tube
Amount of additional charge per 1 ft.
26, 36 types
10 – 100 ft.
If outdoor unit is higher
If outdoor unit is lower
Models
Liquid tube in. (mm)
Gas tube in. (mm)
(ft.)
Outdoor unit is placed
higher. (ft.)
Outdoor unit is placed
lower. (ft.)
(ft.)
1 (oz./ft.)
(lbs.)
Main tubing (L)
26 – 42
ø5/8"
ø3/8"
0.43 oz.
Single
42 type
165 ft. 165 ft.
15 – 100 ft.
0.43 oz.
H1 100
H1 50
U-26PE1U6 U-36PE1U6
U-26PS1U6 U-36PS1U6
3/8 (9.52) 3/8 (9.52)
5/8 (15.88) 5/8 (15.88)
165
100
50
10 – 100 10 – 100
a) 0.43 b) 0.43
4.2
1-63
1. Specifications
Main tubing L
U-42PE1U6
U-42PS1U6
3/8 (9.52)
5/8 (15.88)
165 165
100 100
50 50
10 – 100
b) 0.43
6.2 7.9
1