Correcting Cooling And Heating Capacity; Correcting Changes In Air Conditions; Cooling Performance Curve; Heating Performance Curve - Mitsubishi Electric PUMY-P112VKM1 Service Manual

4-4. CORRECTING COOLING AND HEATING CAPACITY

4-4-1. Correcting 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 (5 m) as "1.0".
• Standard conditions:
• Use the rated capacity and rated input given in "4-3. STANDARD CAPACITY DIAGRAM".
• The input is the single value on the side of the outdoor unit; the input on the sides 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 under stated conditions = total capacity under the stated conditions o
(3) Capacity correction factor curve
PUMY-P112/125/140VKM1(-BS)
Figure 1

Cooling performance curve

1.4
Cooling
1.2
Capacity
(ratio)
1.0
0.8
0.6
1.4
Cooling
Power
1.2
consumption
(ratio)
1.0
0.8
0.6
0.4
0.2
−15 −10 0
Outdoor <D.B. :>
OCH576
Indoor
Rated cooling capacity
Outdoor D.B. 35 ˚C
Indoor
Rated heating capacity
Outdoor D.B. 7˚C / W.B. 6˚C
PUMY-P112/125/140YKM1(-BS)
24
22
20
19
18
16
INDOOR
<W.B. :>
24
22
20
19 19
18
16
INDOOR
10 20 30 40 46
<W.B. :>
D.B. 27˚C / W.B. 19˚C
D.B. 20˚C
Figure 2
1.4
1.2
1.0
Heating
0.8
Capacity
(ratio)
0.6
0.4
1.4
1.2
Heating
Power
1.0
consumption
(ratio)
0.8
0.6
0.4
−15
19
individual capacity at the rated time
total capacity at the rated time

Heating performance curve

−10 −5
0 5 10
Outdoor <W.B. :>
16
21
26
INDOOR
<D.B. :>
16
21
16
INDOOR
15
<D.B. :>