Panasonic R410A Specifications, Outdoor Unit 1. Tubing Size, Table, Indoor unit type, U-26PE1U6

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 26, 36 types

1. Specifications

Single

Main tubing L H1

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.

1

Maximum indoor-outdoor height difference

If outdoor unit is higher	H1	100
If outdoor unit is lower	H1		50

Table 1-2 Tubing Data for Models

Tubing Data		Models	U-26PE1U6	U-36PE1U6	U-42PE1U6
			U-26PS1U6	U-36PS1U6	U-42PS1U6
Tubing size	Liquid tube	in. (mm)	3/8 (9.52)	3/8 (9.52)	3/8 (9.52)
outer diameter	Gas tube	in. (mm)	5/8 (15.88)	5/8 (15.88)	5/8 (15.88)
Limit of tubing length		(ft.)	165	165	165
Limit of elevation	Outdoor unit is placed		100	100	100
	higher.	(ft.)
difference between
	Outdoor unit is placed
the 2 units			50	50	50
	lower.	(ft.)
Max. allowable tubing length at shipment		(ft.)	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.

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