-
9
-
2.5 Selection chart
Correct the cooling capacity in accordance with the conditions as follows. The net cooling capacity can be obtained in the following way.
Net capacity = Capacity shown on specification
✕
Correction factors as follows.
(1)
Coefficient of cooling capacity in relation to temperatures
Piping length [m]
Cooling
7
1.0
10
0.99
15
0.975
20
0.965
25
0.95
How to obtain the cooling capacity
Example : The net cooling capacity of the model SRK71CF-BN with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C
and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 7030
✕
0.975
✕
1.0
=
6854 W
SRK71CF-BN
Length 15m
Factor by air
temperatures
(2)
Correction of cooling capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling capacity in relation to the one way piping length between the indoor and outdoor units.
16
18
20
22
21
25
30
35
40
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
45
50
54
24
Indoor air W.B. temperature
°
C W.B.
Cooling
Applicable range
Coefficient of cooling
capacity in
relation to temperature
Cooling operation
Outdoor air D.B.
temperature
°
C D.B.
ISO-T3
Standard Condition
ISO-T1
Standard Condition
16
18
20
22
21
25
30
35
40
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
45
50
54
24
Indoor air W.B. temperature
°
C W.B.
Cooling
Applicable range
Coefficient of cooling
capacity in
relation to temperature
Cooling operation
Outdoor air D.B.
temperature
°
C D.B.
ISO-T3
Standard Condition
ISO-T1
Standard Condition
S
SRK52CF-BN, 52CF-BP
S
SRK71CF-BN, 71CF-BP