31
4-3. CORRECTING COOLING AND HEATING CAPACITY
4-3-1.
Correcting Changes in Air Conditions
(1)The performance curve charts (Figure 1, 2, 3, 4) show the rated capacity (total capacity) under the stated conditions when
standard length for piping (5m) is used. The rated power is derived from the capacity ratio and power ratio obtained for the
indoor and outdoor intake temperatures at time 1.
• Standard conditions:
• Use the rated capacity and rated power values given in the characteristics table for each indoor unit.
• The capacity is the single value on the side of the outdoor unit; the capacity on the sides of each indoor unit must be
added to obtain the total capacity.
(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
(3)Capacity correction factor curve
Figure 1. PUMY-VM Cooling performance curve
Figure 2. PUMY-VM Heating performance curve
PUMY-VM
1
PUMY-VM
1
PUMY-YM
PUMY-YM
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
0.4
-12 -10
0
10
5
-5
15
0.6
0.8
1.0
1.2
1.4
0.6
0.8
1.0
1.2
1.4
15
20
25
20
15
25
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.
:
:
>
Service Ref
PUMY-VM/VM
1
/YM
PUMY-VM
2
/YM
1
/VMA/VMA
1
/YMA
Rated cooling capacity
Rated heating capacity
Indoor D.B. 27
°
C / W.B. 19.5
°
C
Outdoor D.B. 35
°
C
Indoor D.B. 21
°
C
Outdoor D.B. 7
°
C / W.B. 6
°
C
Indoor D.B. 27
°
C / W.B. 19.0
°
C
Outdoor D.B. 35
°
C
Indoor D.B. 20
°
C
Outdoor D.B. 7
°
C / W.B. 6
°
C
OC183E--2.qxp 10.5.6 0:46 PM Page 31
