Mitsubishi Heavy Industries SRC25MA-S User Manual

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2.5 Performance curve
The cooling and heating capacities are measured in the following conditions. The actual capacity can
be obtained with the following formula.
Actual capacity = Rating capacity x Correction factor
(1) Capacity correction according to indoor and outdoor temperatures:
Outdoor air W.B. temperature (°C W.B.) ISO-T1 Standard
⑵ Capacity correction according to one way length of refrigerant piping:
It is necessary to correct the cooling and heating capacity according to the one way length of refrigerant
piping.
Piping length (m)
7
10
15
Cooling
1.0
0.99
0.975
Heating
1.0
1.0
1.0
⑶ Capacity correction according to frosting on outdoor heat exchanger during heating:
In additions to the foregoing corrections (1) and (2), the heating capacity also needs to be corrected
according to the frosting on the outdoor heat exchanger.
Air inlet temperature
of outdoor unit
-10
-9
-7
-5
-3
-1
1
3
5
Frosting correction
factor
0.95
0.94
0.93
0.91
0.88
0.86
0.87
0.92
1.00
⑷ Example of cooling and heating capacity calculation:
The actual cooling capacity of model SRK50MA-S with the one way piping length of 25m at the
indoor wet-bulb temperature of 19℃ and outdoor dry-bulb temperature of 35℃in summer or indoor
dry-bulb temperature of 20℃, outdoor dry-bulb temperature of 1℃and indoor wet-bulb temperature of
-1℃ in winter is
Actual cooling capacity = 5000 x 1.0 x 0.95 ≈ 4750W
Cooling
Heating
Accommodation
Correction factor of cooling & heating
capacity in relation to temperature
Cooling operation
Heating operation
Indoor air D.B.
temperature
Outdoor air D.B.
temperature
Indoor air W.B. temperature (°C W.B) ISO-T1 Standard

Mitsubishi Heavy Industries SRC25MA-S Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SRC25MA-S
Category	Air Conditioner
Language	English