Panasonic S-36PU1E5A Service Manual page 414

1
Restriction on the number of passes of the heat exchanger hairpin
Minimum number of passes
= Number of steps × Distance between tube sheets × Number of rows × 1.5 ×10
<For example>
Number of steps
Distance between tube sheets
Number of rows
Minimum number of passes = 12 × 1000 × 3 × 1.5 × 10
: 12
: 1000 [mm]
: 3
-4 = 5.4 < 6 passes
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