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How to Get the Equivalent Piping Length
Bends cause pressure loss when refrigerant is transported, so make sure there are as few bends in the system as possible. Piping length
needs to include the actual length and the equivalent length where the bends are counted.
38VMA072~336RDS(L)5-1
38VMA072~336RDS(L)6-1
Equivalent length = (Actual piping length to the farthest indoor unit) + (1.64 x number of bends on the piping) [ft.]
Correction Factor for Frosting and Defrosting
In low temperature heating operation, the outdoor heat exchanger may be covered with frost causing the heating capacity to decrease.
However, the system automatically carries out defrost action, and the average heating capacity can be calculated by multiplying the
correction factor shown below.
38VMA240RDL5-1(RDL6-1) 38VMA264RDS5-1(RDS6-1)
38VMA288RDS5-1(RDS6-1) 38VMA312RDS5-1(RDS6-1)
38VMA336RDS5-1(RDS6-1)
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