Data - Mitsubishi Electric MXZ-4C36NAHZ Service Manual

4

DATA

4-1. COOLING AND HEATING CAPACITY AND CHARACTERISTICS
4-1-1. 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 4-3. STANDARD CAPACITY DIAGRAM.
(1) Capacity of indoor unit
Model Number for
indoor unit
M series
P series
Model Capacity
SEZ
[kBtu/h]
SLZ
MVZ
* 1
The value is for MSZ-GE15NA.
* 2
The value is for MSZ-FH15NA.
* 3
The value is for MSZ-GE/FH18NA.
* 4
The value is for MSZ-FE18NA or MFZ-KA18NA.
(2) Sample calculation
System assembled from indoor and outdoor unit (in this example the total capacity of the indoor units is greater than that of
1
the outdoor unit)
• Outdoor unit MXZ-5C42NAHZ
• Indoor unit MSZ-GE09NA × 2 + MSZ-FH15NA ×2
According to the conditions in
2
The following figures are obtained from the 16.8 total capacity of indoor units, referring the standard capacity diagram in
3
"4-3-3. MXZ-5C42NAHZ <cooling>" and "4-3-4. MXZ-5C42NAHZ <heating>".
Capacity (kBTU/h)
Cooling Heating
42.0 48.0
A B
4-1-2. Method for obtaining the heating and cooling capacity of an indoor unit:
(1) The capacity of each indoor unit (kW) = the capacity
(2) Sample calculation (using the system described above in 4-1-1. (2) ):
During cooling:
• The total model capacity of the indoor unit is:
9.0 × 2 + 15.0 × 2 = 48.0 kBTU/h
Therefore, the capacity of MSZ-GE09NA and
MSZ-FH15NA will be calculated as follows by
using the formula in 4-1-2. (1):
9.0
Model 09 = 42.0 ×
48.0
15.0
Model 15 = 42.0 ×
48.0
OCH573
Model 09 Model 12 Model 15 Model 18 Model 24 Model 30 Model 36
Model 06
6.0 9.0 12.0
─ ─
12.0
─
8.1 11.5
─
8.4 11.1
─ ─
12.0
, the total capacity of the indoor unit will be: 9.0 × 2 + 15.0 × 2 = 48.0
1
Outdoor unit power consumption (kW) Outdoor unit current (A)/ 230 V
Cooling Heating
3.46 4.37
= 7.88 kBTU/h
= 13.13 kBTU/h
14.0* 1 17.2* 3
15.0* 2 18.0* 4
─
18.0
14.1 17.2
─
15.0
─
18.0
Cooling Heating
15.26 19.31
model capacity
(or ) o
A B
total model capacity of all indoor units
During heating:
• The total model capacity of indoor unit is:
10.9 × 2 + 18.0 × 2 = 57.8 kBTU/h
Therefore, the capacity of MSZ-GE09NA and MSZ-
FH15NA will be calculated as follows by using the
formula in 4-1-2. (1):
10.9
Model 25 = 48.0 ×
57.8
18.0
Model 50 = 48.0 ×
57.8
12
─ ─
22.5
24.0 30.0 35.0
─ ─ ─
─ ─ ─
24.0 30.0 36.0
= 9.05 kBTU/h
= 14.95 kBTU/h