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layer of all indoors and outdoors should be connected together, and be
grounded on outdoor at single point, and be grounded on outdoor at single
point.
1.2 Indoor checking
1.2.1 Indoor unit pipe size checking
Model 22~45 56~90 112~140
Gas pipe (mm) Φ12.7 Φ15.88 Φ15.88
Liquid pipe(mm) Φ6.35 Φ9.52 Φ9.52
1.2.2 Power cable and signal wire confirmation: Indoor units of one system
use one power supply, The signal wire shielded layer of all indoors and
outdoors should be connected together, and be grounded on outdoor at
single point.
Part 2
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