71
(3) Capacity correction
Cooling and heating capacity is lowered according to the piping length. Capacity can be obtained by referring
to the following capacity curves.
When the diameter of the gas pipe is smaller than the standard size, cooling capacity is lowered comparing to
the operation using the standard diameter pipe.
The lowered capacity can be obtained by referring to the capacity curves for gas pipe which is 1 or 2 size
smaller than standard size.
Corrected pipe length (m) = actual pipe length (m) + number of bends
o
0.3 (m)
1. Capacity curves 1 <Standard size>
2. Capacity curves 2 <When the gas pipe's diameter is 1-size-smaller than the standard size>
3. Capacity curves 3 <When the gas pipe's diameter is 2-size-smaller than the standard size>
Cooling
Heating
RP200
RP250
RP200,250
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100 105 110 115
125
120
70
75
80
85
90
95
100
Corrected pipe length [m]
Capacity ratio [%]
Heating
Cooling
70
75
80
85
90
95
100
7.5 10
15
20
25
30
35
40
45
50
55
Corrected pipe length [m]
Capacity ratio [%]
RP200(
:
22.2)
RP250(
:
22.2)
RP200, 250(
:
22.2)
RP200, 250(
:
19.05)
RP200(
:
19.05)
RP250(
:
19.05)
Heating
Cooling
70
75
80
85
90
95
100
7.5
10
15
20
25
Corrected pipe length [m]
Capacity ratio [%]
w
RP250
Use 1/2H or H pipes if the diameter
is
19.05.
