Specifications

997
FDC-HKXR
20.2.6 Selection chart
Indoor unit
Each indoor unit = System performance 
(a) Coefficient of cooling and heating capacity in relation to temperatures
Outdoor unit
System performance =
(1) Correct the cooling and heating capacity in accordance with the conditions as follows.The net cooling and heating capacity can
be,obtained in the following way.
Indoor unit capacity
Indoor unit capacity when operating simultaneously.
Note: Refer to page 997 and 998 for the correction coefficient.
Performance from connected capacity  correction coefficient from indoor and
outdoor temperature conditions  (correction coefficient from piping distance 
correction coefficient from difference between indoor and outdoor temperature) 
(correction coefficient from condensation when heating).
0 5 10 15-5-10
2220181614
24
18.5
26
JIS
10
15
20
25
27
–5
0
20
25
30
35
40
43
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
20 22 24 26
JIS
Performance correction coefficient
Cooling
Heating
Outdoor dry bulb temperature (˚CDB)
Indoor dry bulb temperature (˚CDB)
Range in which
use is possible
Cooling
Heating
Indoor wet bulb temperature (˚CWB)
Outdoor wet bulb temperature (˚CWB)
(b) Correction of cooling and heating capacity in relation to one way length of refrigerant piping.
Note (1) Equivalent piping length can be obtained by calculating as follows.
Equivalent piping length = Real gas piping length + Number of bends in gas piping × Equivalent piping length of bends.
Equivalent length of each joint
5
1.0
1.0
10
0.99
1.0
15
0.975
1.0
20
0.965
1.0
25
0.95
1.0
30
0.94
0.995
35
0.925
0.995
40
0.915
0.99
45
0.9
0.99
50
0.89
0.985
Equivalent piping length [m]
Cooling
Heating
(1)
55
0.875
0.985
60
0.865
0.98
65
0.85
0.98
70
0.84
0.975
75
0.825
0.975
80
0.815
0.97
85
0.8
0.97
90
0.79
0.965
95
0.775
0.965
100
0.765
0.96
Equivalent piping length [m]
Cooling
Heating
105
0.745
0.96
110
0.74
0.955
115
0.725
0.955
120
0.715
0.95
125
0.7
0.95
Equivalent piping length [m]
Cooling
Heating
Gas piping size
Joint (90˚elbow)
φ12.7
0.10
φ15.88
0.10
φ19.05
0.15
φ25.4
0.15
φ28.58
0.20
Unit : m/one part