Correction At Frost And Defrost - Mitsubishi Electric HYBRID CITY MULTI PURY-M200-300YNW-A Data Book

8. CAPACITY TABLES
8-3-2. Heating capacity correction
PURY-(E)M200YNW-A(-BS)
1.00
0.90
0.80
0 20 40 60
HBC to outdoor unit refrigerant piping equivalent length (m)
PURY-(E)M250, 300YNW-A(-BS)
1.00
0.90
0.80
0 20 40 60
HBC to outdoor unit refrigerant piping equivalent length (m)
8-3-3. How to obtain the equivalent piping length
Refrigerant pipe
1. PURY-(E)M200, 250, 300YNW(-BS)
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.35 × number of bends in the piping) [m]
Water pipe
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.55 × number of bends in the piping) [m]

8-4. 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-(E)M200YNW-A(-BS)
PURY-(E)M250YNW-A(-BS)
PURY-(E)M300YNW-A(-BS)
MEES17K104
80 100 120 140 160
80 100 120 140 160
6 4 2
43 39 36
1.00 0.95 0.84
1.00 0.95 0.84
1.00 0.93 0.82
PURY-(E)M200YNW-A(-BS)
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0 10 20
Water piping equivalent length to farthest indoor unit (m)
PURY-(E)M250, 300YNW-A(-BS)
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0 10 20
Water piping equivalent length to farthest indoor unit (m)
1 0 -2 -4
34 32 28 25
0.83 0.83 0.87 0.90
0.83 0.83 0.87 0.90
0.80 0.82 0.86 0.90
R2-Series
30 40 50 60 70
30 40 50 60 70
-6 -8 -10
21 18 14
0.95 0.95 0.95
0.95 0.95 0.95
0.90 0.95 0.95
-20
-4
0.95
0.95
0.95
31