Bill Hulings
New Member
Hello Hive Mind,
I'm installing a Mitsu MXZ-3C30NAHZ2(Hyper Heat) outdoor unit, with two heads--MSZ-FH15NA, and MSZ-FH18NA. Both indoor units arrived with 1/4" and 3/8" copper tubing, factory installed. HOWEVER, the 3/8" lines have 1/2" connectors factory installed!!! Is this typical? What size Line Set do I use? Do I match the 1/2" connector with 1/2" line, or do I match the 3/8" line with 3/8" line using a reducing adapter? The MXZ-3C30 has 3 ports; two with 3/8", and one with 1/2" (all 3 ports using 1/4" line as well)
Above: factory lines on top of image. 3/8" line on bottom for comparison.
I'm installing a Mitsu MXZ-3C30NAHZ2(Hyper Heat) outdoor unit, with two heads--MSZ-FH15NA, and MSZ-FH18NA. Both indoor units arrived with 1/4" and 3/8" copper tubing, factory installed. HOWEVER, the 3/8" lines have 1/2" connectors factory installed!!! Is this typical? What size Line Set do I use? Do I match the 1/2" connector with 1/2" line, or do I match the 3/8" line with 3/8" line using a reducing adapter? The MXZ-3C30 has 3 ports; two with 3/8", and one with 1/2" (all 3 ports using 1/4" line as well)
Above: factory lines on top of image. 3/8" line on bottom for comparison.