Correction At Frost And Defrost; Correction At Evaporation-Temperature (Et) Control - Mitsubishi Electric CITY MULTI PURY-HP72TNU-A Data Book

8. CAPACITY TABLES

8-5. Correction at frost and defrost

Due to frost at the outdoor heat exchanger and the automatic defrost operation, the heating capacity of the outdoor unit can be
calculated by multiplying the correction factor shown in the table below.
Table of correction factor at frost and defrost
Outdoor inlet air temp. °CWB
Outdoor inlet air temp. °FWB
PURY-HP72TNU-A
PURY-HP96TNU-A
PURY-HP120TNU-A
PURY-HP144TSNU-A
PURY-HP192TSNU-A
PURY-HP240TSNU-A
PURY-HP72YNU-A
PURY-HP96YNU-A
PURY-HP120YNU-A
PURY-HP144YSNU-A
PURY-HP192YSNU-A
PURY-HP240YSNU-A
* The correction factors in the table above are used for a full-load and above.
Use the formula below to calculate the correction factor to use for a partial load.
Correction factor for partial load: K
Correction factor for a full load and above: K
Partial load factor: A
K = 1 - (1 - K ) × A
0

8-6. Correction at evaporation-temperature (ET) control

When the target evaporation temperature is changed, the capacity or the power input can be calculated by multiplying the
correction factor shown in the table below.
ET *1
Capacity
Correction factor
Power Input
*1 The evaporation temperature in operation may be different from the preset target evaporation
temperature because it depends on such factors as the unit protection control.
The capacity and power input could also fluctuate.
*2 Use the table above which indicates the unit properties as a reference
MEES19K180
6 4 2 1
43 39 36 34
1.00
0.95 0.84 0.83
1.00
0.95 0.84 0.83
1.00
0.93 0.85 0.83
1.00
0.98 0.89 0.86
1.00
0.98 0.89 0.86
1.00
0.94 0.84 0.86
1.00
0.95 0.84 0.83
1.00
0.95 0.84 0.83
1.00
0.93 0.85 0.83
1.00
0.98 0.89 0.86
1.00 0.98 0.89 0.86
1.00
0.94 0.84 0.86
0
°C 6
°F 43
0.90 0.83
0.90 0.72
0 -2 -4
32 28 25
0.83 0.87 0.90
0.83 0.87 0.90
0.84 0.86 0.90
0.88 0.90 0.91
0.88 0.90 0.91
0.87 0.88 0.90
0.83 0.87 0.90
0.83 0.87 0.90
0.84 0.86 0.90
0.88 0.90 0.91
0.88 0.90 0.91
0.87 0.88 0.90
9 11 14
48 52 57
0.71 0.55
0.54 0.36
Hyper Heating Inverter R2-Series
-6 -8 -10 -20
21 18 14 -4
0.93 0.93 0.95 0.95
0.93 0.93 0.95 0.95
0.90 0.92 0.95 0.95
0.92 0.92 0.95 0.95
0.92 0.92 0.95 0.95
0.90 0.92 0.95 0.95
0.93 0.93 0.95 0.95
0.93 0.93 0.95 0.95
0.90 0.92 0.95 0.95
0.92 0.92 0.95 0.95
0.92 0.92 0.95 0.95
0.90 0.92 0.95 0.95
70