Panasonic 36PSU1U6 - Manual (Page 69)

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1. Specifications
1-12. Installation Instructions
1. Tubing Size
Outdoor Unit
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 26, 36 types 42 type
165 ft. 165 ft. Maximum length
Charge-less tubing length (actual length) 10 – 100 ft. 15 – 100 ft.
0.43 oz. Additional charge per 1 ft.
Maximum indoor-outdoor
height difference If outdoor unit is higher H1
H1
100
If outdoor unit is lower 50
Single
Main tubing L
H1
Table 1-2 Tubing Data for Models
U-26PE1U6
U-26PS1U6 U-36PE1U6
U-36PS1U6 U-42PE1U6
U-42PS1U6
Tubing size
outer diameter Liquid tube in. (mm) 3/8 (9.52) 3/8 (9.52) 3/8 (9.52)
Gas tube in. (mm) 5/8 (15.88) 5/8 (15.88) 5/8 (15.88)
165 165 165 (ft.)
(ft.)
(ft.)
(ft.)
Limit of tubing length
Limit of elevation
difference between
the 2 units
Outdoor unit is placed
100 100 100
higher.
Outdoor unit is placed
50 50 50
lower.
Max. allowable tubing length at shipment 10 – 100 10 – 100 10 – 100
Required additional refrigerant * 1 (oz./ft.) a) 0.43 b) 0.43 b) 0.43
Refrigerant charged at shipment (lbs.) 4.2 6.2 7.9
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
Main tubing (L)
Type capacity of indoor units 26 – 42
Gas tube ø5/8"
Liquid tube ø3/8"
Amount of additional charge per 1 ft. 0.43 oz.
Tubing Data
Models
1
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