I'm installing a two-zone Mitsubishi mini split (in Pasadena, CA area, 1400 sf, single family detached, one-story home, if context is relevant). This is my first install, and I am trying to determine if extra refrigerant needs to be added based on the line set distance to each of the two indoor units. The outdoor unit is factory charged with R410A.
Outdoor Unit - MXZ-2C20NAHZ2
Indoor Unit 1 - PEAD-A12 (pipe length distance from outdoor unit: ~25 feet)
Indoor Unit 2 - MSZ-FH12NA (pipe length distance from outdoor unit: ~40 feet)
The manual (attached image) for the outdoor unit (MXZ-2C20NAHZ2) says "Max. pipe length per indoor unit for multi system" is 82 ft, and that refrigerant adjustment for longer lengths is 1.08 oz/5 ft. The manual for indoor unit 1 says maximum pipe length is 23 feet (before additional refrigerant is required). The manual for indoor unit 2 says maximum pipe length is 25 feet (before additional refrigerant is required). So...I'm trying to determine which number is applicable -- 82, 23, or 25? Does the system need additional charge?
I'll contact the manufacturer as well, but I thought I'd ask here in case anyone has installed one of these systems and already determined the answer to this question. Thanks for your help.