Panasonic 26PEK1U6 Tech Data - Service Manual - Page 69

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. 1. Specifications Single Main tubing L H1 Table 1-1 Indoor unit type 26, 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. 1 Maximum indoor-outdoor If outdoor unit is higher H1 100 height difference If outdoor unit is lower H1 50 Table 1-2 Tubing Data for Models Tubing Data Models U-26PE1U6 U-26PS1U6 U-36PE1U6 U-36PS1U6 Tubing size outer diameter Liquid tube Gas tube in. (mm) in. (mm) 3/8 (9.52) 5/8 (15.88) 3/8 (9.52) 5/8 (15.88) Limit of tubing length (ft.) 165 165 Outdoor unit is placed Limit of elevation higher. 100 (ft.) 100 difference between the 2 units Outdoor unit is placed 50 50 lower. (ft.) Max. allowable tubing length at shipment (ft.) 10 - 100 10 - 100 Required additional refrigerant * 1 (oz./ft.) a) 0.43 b) 0.43 Refrigerant charged at shipment (lbs.) 4.2 6.2 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 Gas tube Liquid tube Amount of additional charge per 1 ft. 26 - 42 ø5/8" ø3/8" 0.43 oz. U-42PE1U6 U-42PS1U6 3/8 (9.52) 5/8 (15.88) 165 100 50 10 - 100 b) 0.43 7.9 1-63