Mitsubishi Electric PUMY-P36NHMU, Техническое и сервисное руководство, Страница: 12 / 100

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5 DATA
5-1. COOLING AND HEATING CAPACITY AND CHARACTERISTICS
5-1-1. Method for obtaining system cooling and heating capacity:
To obtain the system cooling and heating capacity and the electrical characteristics of the outdoor unit, first add up the ratings
of all the indoor units connected to the outdoor unit (see table below), and then use this total to find the standard capacity with
the help of the tables on 5-2.STANDARD CAPACITY DIAGRAM.
(1) Capacity of indoor unit
5-1-2. Method for obtaining the heating and cooling capacity of an indoor unit:
(1) The capacity of each indoor unit (Btu/h) = the capacity
A
(or
B
)
o
(2) Sample calculation (using the system described above in 5-1-1. (2) ):
model capacity
total model capacity of all indoor units
During cooling: During heating:
• The total model capacity of the indoor unit is:
8000
o
2 + 18000
o
2=52000Btu/h
Therefore, the capacity of PKFY-P08NAMU-E and
PLFY-P18NLMU-E will be calculated as follows by
using the formula in 5-1-2. (1):
Model 08= 48,900
o
= 7,520 Btu/h
Model 18= 48,900
o
= 16,930 Btu/h
• The total model capacity of indoor unit is:
9000
o
2 + 20000
o
2=58000 Btu/h
Therefore, the capacity of PKFY-P08NAMU-E and
PLFY-P18NLMU-E will be calculated as follows by
using the formula in 5-1-2. (1):
Model 08=54,500
o
= 8,460 Btu/h
Model 18= 54,500
o
= 18,790 Btu/h
8000
52000
(2) Sample calculation
1
System assembled from indoor and outdoor unit (in this example the total capacity of the indoor units is greater than that of
the outdoor unit)
• Outdoor unit PUMY-P48NHMU
• Indoor unit PKFY-P08NAMU-E
o
2 , PLFY-P18NLMU-E
o
2
2
According to the conditions in
1
, the total capacity of the indoor unit will be: 8
o
2 + 18
o
2 = 52
3
The following figures are obtained from the 52 total capacity row of the standard capacity table (5-2.):
Model 06
Model Number for indoor unit
Model Capacity
6
Model 08
8
Model12
12
Model 15
15
Model 18
18
Model 24
24
Model 27
27
Model 30
30
Model 36
36
Model 48
48
Model 54
54
Cooling
A
48,900
Heating
20.6
Cooling
21.9
Heating
4.71
Cooling
5.01
Heating
B
54,500
Capacity (Btu/h) Outdoor unit power consumption (kW) Outdoor unit current (A)/230V
18000
52000
9000
58000
20000
58000