Dimensions and Tube Sizes of Branches and Headers for 2-Pipe ECOi 6N Systems
Optional Distribution Joint Kits See the installation instructions packaged with the distribution joint kit for the installation procedure.

Outdoor unit side:
CZ-P680PH2BM: 68.0 kW or less (Cooling CapaCity after distribution)
CZ-P1350PH2BM: > From 68.0 kW to 168.0 kW (Cooling CapaCity after distribution)

Indoor unit side:
CZ-P224BK2BM: 22.4 kW or less (Cooling CapaCity after distribution)
CZ-P680BK2BM: From 22.4 kW to 68.0 kW (Cooling CapaCity after distribution)
CZ-P1350BK2BM: From 68.0 kW 168.0 kW or less (Cooling CapaCity after distribution)

Tubing size (with thermal insulation)

1. CZ-P680PH2BM
For outdoor unit side (Capacity after distribution joint is 68.0 kW or less.)

Gas tubing

Liquid tubing

Unit: mm

2. CZ-P1350PH2BM
For outdoor unit side (Capacity after distribution joint is greater than 68.0 kW and no more than 168.0 kW.)

Gas tubing

Liquid tubing

Unit: mm

3. CZ-P224BK2BM
For indoor unit side (Capacity after distribution joint is 22.4 kW or less.)

Gas tubing

Liquid tubing

Unit: mm

4. CZ-P680BK2BM
For indoor unit side (Capacity after distribution joint is greater than 22.4 kW and no more than 68.0 kW.)

Gas tubing

Liquid tubing

Unit: mm

5. CZ-P1350BK2BM
For indoor unit side (Capacity after distribution joint is greater than 68.0 kW and no more than 168.0 kW.)

Gas tubing

Liquid tubing

Unit: mm

Diameters
1. 6.35 mm 1/4’’ / 2. 9.52 mm 3/8’’ / 3. 12.70 mm 1/2’’ / 4. 15.88 mm 5/8’’ / 5. 19.05 mm 3/4’’ / 6. 22.40 mm 7/8’’ 7. 25.40 mm 1’’ / 8. 28.57 mm 1’’ 1/8 / 9. 31.75 mm 1’’ 1/4 / 10. 34.92 mm 1’’3/8 / 11. 38.10 mm 1’’1/2 / 12. 41.28 mm 1’’5/8 / 13. 44.45 mm 1’’3/4 / 14.  50.80 mm 2’’