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5-3. CORRECTING COOLING AND HEATING CAPACITY
5-3-1. Correcting Capacity for Changes in Air Conditions
(1)The performance curve charts (Figure 1, 2) show the change ratio of capacity and input (power consumption) according to the
indoor and outdoor temperature condition when defining the rated capacity (total capacity) and rated input under the standard
condition in standard piping length (5m) as “1.0”.
• Standard conditions:
• Use the rated capacity and rated input given in “5-2.”.
• The input is the single value of the outdoor unit; the input of each indoor unit must be added to obtain the total input.
(2)The capacity of each indoor unit may be obtained by multiplying the total capacity obtained in (1) by the ratio between the
individual capacity at the rated time and the total capacity at the rated time.
individual capacity at the rated time
Individual capacity under stated conditions = total capacity under the stated conditions o
total capacity at the rated time
Rated cooling capacity
Rated heating capacity
Indoor D.B. 27°C / W.B. 19°C
Outdoor D.B. 35°C
Indoor D.B. 20°C
Outdoor D.B. 7°C / W.B. 6°C
(3)Capacity correction factor curve
Figure 1.PUMY-P100VHM PUMY-P100VHMA
PUMY-P125VHM PUMY-P125VHMA
PUMY-P140VHM PUMY-P140VHMA
Cooling performance curve
0.4
-5 0 10 20 30 40 46
0.6
0.8
1.0
1.2
1.4
0.6
0.8
1.0
1.2
1.4
22
20
18
16
22
20
18
16
0.6
0.4
0.8
1.0
1.2
1.4
0.4
0.6
0.8
1.0
1.2
1.4
-10-15 -5 0 5 10 15
20
25
15
20
25
15
Cooling
Capacity
(ratio)
Cooling
Power
consumption
(ratio)
Heating
Power
consumption
(ratio)
Heating
Capacity
(ratio)
INDOOR
<D.B. :>
INDOOR
<W.B. :>
INDOOR
<W.B. :>
INDOOR
<D.B. :>
Outdoor <D.B.
::
>
Outdoor <W.B.
::
>
Figure 2. PUMY-P100VHM PUMY-P100VHMA
PUMY-P125VHM PUMY-P125VHMA
PUMY-P140VHM PUMY-P140VHMA
Heating performance curve
OC376B--1.qxp 08.1.17 1:14 PM Page 15