Lennox LM018CI-115P432-1X Owner's Manual page 41

Configuration of connection pipe
Additional refrigerant charging amount for R22, R407C, R410A and R134a
Diameter of connection pipe
Liquid pipe(mm)
Φ6
Φ6 or Φ9.52
Φ12
Φ16
Φ19
Φ22.2
Gas pipe(mm)
Φ9.52 or Φ12
Φ16 or Φ19
Φ19 or Φ22.2
Φ25.4 or Φ31.8
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Outdoor unit throttle
Cooling only(g/m) Cooling and heating(g/m)
15
15
30
60
250
350
36
20
50
120
120
250
350