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7. Capacity Correction Factor
Notes
1. These figures illustrate the rate of change in capacity of a standard indoor unit system at maximum load under standard
conditions.(Moreover, under partial load conditions there is only a minor deviation from the rate of change in capacity
shown in the above figures.)
2. With this outside unit, evaporating pressure constant control when cooling, and condensing pressure constant control
when heating is carried out.
3. If heat insulation of piping is insufficient, heat loss will become larger and capacity will decrease.
4. Method of calculating cooling / heating capacity : maximum cooling / heating capacity of outside units = cooling / heating
capacity of outside units obtained from capacity table X capacity correction factor due to piping length to the farthest
indoor unit
5. Equivalent piping length for Y Branch and other pipes can be calculated with following table.
mm
Ø6.35 Ø9.52 Ø12.7 Ø 15.88 Ø19.05 Ø22.2 Ø25.4 Ø28.58 Ø31.8 Ø34.9 Ø38.1 Ø41.3 Ø44.5 Ø53.98
(inch)
(1/4)
Elbow (m)
0.16
Y Branch (m)
Header (m)
6. When the any one (or both ) of below conditions are satisfied, the diameter of main pipe must be increased.
- The equivalent length between outdoor unit and the farthest indoor unit is 90m or more (Liquid and Gas pipes are
increased)
Upward Outdoor unit total capacity
HP
2.5
3
4
h If available on site, select pipe size according to upper table. Otherwise it doesn't need to be increased.
h Model line up could be different in accordance with target region.
7. Read cooling / heating capacity rate of change in the above figures based on the following equivalent length. : overall
equivalent length = (equivalent length of main pipe) X correction factor + (equivalent length after first branching)
(3/8)
(1/2)
(5/8)
(3/4)
(7/8)
0.18
0.2
0.25
0.35
Liquid pipe [mm(inch)]
Ø 9.52(3/8)
Ø 9.52(3/8)
Ø 9.52(3/8)
(1)
(1-1/8) (1-1/4) (1-3/8) (1-1/2) (1-5/8) (1-3/4) (2-1/8)
0.4
0.45
0.5
0.55
0.6
0.5
1
Standard Pipe Diameter
Gas pipe [mm(inch)]
Ø 15.88(5/8)
Ø 15.88(5/8)
Ø 15.88(5/8)
0.65
0.7
0.75
0.85
_ 19
R410A(50/60Hz)
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