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5-3-2. Correcting Capacity for Changes in the Length of Refrigerant Piping
(1) During cooling, to obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total
in-use indoor capacity, first find the capacity ratio corresponding to the standard piping length from Figure 3,
and then multiply by the cooling capacity from Figure 1 to obtain the actual capacity.
(2) During heating, to find the equivalent piping length, first find the capacity ratio corresponding to standard piping length
from Figure 3, and then multiply by the heating capacity from Figure 2 to obtain the actual capacity.
(2) Method for Obtaining the Equivalent Piping Length
Equivalent length for type P100·125·140 = (length of piping to farthest indoor unit) + (0.3 o number of bends in the piping) (m)
Length of piping to farthest indoor unit: type P100~P140.....80m
5-3-3. Correction of Heating Capacity for Frost and Defrosting
If heating capacity has been reduced due to frost formation or defrosting, multiply the capacity by the appropriate correction
factor from the following table to obtain the actual heating capacity.
Correction factor diagram
6
1.0
-10
0.95
-8
0.95
-6
0.95
-4
0.9
-2
0.89
0
0.88
2
0.89
4
0.98
Outdoor Intake temperature (W.B.°C)
Correction factor
(1) Capacity CORRECTION CURVE (Figure 3)
Cooling
Heating
100
95
90
85
80
75
70
5 101520253035404550556065707580[m]
Cooling P100 model
Heating P100, 125, 140
models
Cooling P125 model
Cooling P140 model
Capacity ratio [%]
Corrected pipe length
OC376B--1.qxp 08.1.17 1:14 PM Page 16