Correction Factors According To Piping Length - Hitachi RAK-18PED Technical Catalogue

CAPACITIES TABLE
10

3.2. CORRECTION FACTORS ACCORDING TO PIPING LENGTH

Correction Factor for Cooling Capacity according to
Piping Length
The cooling capacity should be corrected according to the
following formula:
CCA = CC x F
CCA: Actual Corrected Cooling Capacity
(kcal/h)
CC: Cooling Capacity in the Performance
Table (kcal/h)
F: Correction Factor Based on the
Equivalent Piping Length
The correction factors are shown in the following figure.
Equivalent Piping Length for:
– One 90º Elbow is 0.5m.
– One 180º Curve is 1.5m.
Models :
Pipe length (m)
H
L
RAK-18PED/RAC-18WED,RAK-25PED/RAC-25WED,RAK-35PED/RAC-35WED
RAK-25PEDC/RAC-25WED,RAK-35PEDC/RAC-35WED
RAS-X10EAG/RAC-X10EAG,RAS-X14EAG/RAC-X14EAG
RAS-L10EAG/RAC-L10EAG,RAS-L14EAG/RAC-L14EAG
RAS-M25EAG/RAC-M25EAG,RAS-M35EAG/RAC-M35EAG
Correction Factor for Heating Capacity according to
Piping Length
The heating capacity should be corrected according to the
following formula:
HCA= HC x F
HCA: Actual Corrected Heating Capacity
(kcal/h)
HC: Heating Capacity in the Performance
Table (kcal/h)
F: Correction Factor Based on the
Equivalent Piping Length
H: Vertical Distance Between Indoor Unit and Outdoor
Units in Meters
L: Actual One-Way Piping Length Between Indoor Unit
and Outdoor Unit in Meters
EL: Equivalent Total Distance Between Indoor Unit and
Outdoor Unit in Meters
(Equivalent One-Way Piping Length)
Pipe length (m)