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2.5 Selection chart
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.
Net capacity = Capacity shown on specification
(1) Coefficient of cooling and heating capacity in relation to temperatures
0.9
0.8
0.7
0.6
43
40
35
30
25
20
27
25
20
(2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor
units.
ipinglength[m]
Cooling
Heating
(3) Correction relative to frosting on outdoor heat exchanger during heating
In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the
outdoor heat exchanger.
irinlettemperatureof
outdoorunitinûCWB
djustmentcoefficient
Correction factors as follows.
.3
.2
Cooling
.
.0
5
Indoor air W.B. temperature °C W.B.
5
0
Outdoor air W.B. temperature °C W.B.
7
10
15
1.0
0.99
0.975
1.0
1.0
1.0
-10
-9
-7
0.95
0.94
0.93
Heating
Applicablerange
4 6 8 20 22
ISO-T StandardCondition
0
ISO-T StandardCondition
-5
-3
-1
1
0.91
0.88
0.86
0.87
7
-
-
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24
20
5
0
-
3
5
0.92
1.00
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