Mitsubishi FDC121KXZEN1-W - Page 137

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135
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'20 • KX-T-373
<Outdoor unit maximum heating capacity> : Item (2) (b) calculation
• Outdoor unit rated heating capacity: 14.0 kW
• Capacity compensation coefficient according to temperature conditions:
0.98 (Calculated according to Outdoor 6˚C WB / Indoor 19˚C DB); (See page 136)
Outdoor unit heating capacity: 14.0 kW × 0.98 13.7 kW
• Capacity compensation coefficient according to piping length: 1.0 (calculated according to 60 m length); (See page 137)
13.7 kW × 1.0 = 13.7 kW
.
=
.
•
Capacity compensation coefficient according to height difference: 0.96 (calculated according to 20 m difference); (See page 138)
13.7 kW × 0.96
.
=
.
13.2 kW
• Correction of heating capacity in relation to the frost on the outdoor unit heat exchanger: 1.0;
13.2 kW × 1.0
.
=
.
13.2 kW.
• Capacity compensation coefficient according to indoor unit connected total capacity: 1.02 , (56 × 3) / 140 = 120%) (See page 138)
13.2 kW × 1.02
.
=
.
13.5 kW.
<System heating capacity>: Item (2) (c) calculation
Compare the indoor unit total heating capacity and the outdoor unit maximum heating capacity. The smaller value is the actual
system heating capacity.
• Indoor unit total heating capacity : 18.6 kW
• Outdoor unit maximum heating capacity : 13.5 kW
e System heating capacity: 13.5 kW
<Indoor unit heating capacity compensation> (Item (2) (d) calculation
13.5 kW × 6.2 kW
4.5 kW
18.6 kW
(3) Capacity compensation coefficient
(a)
Capacity compensation coefficient and power consumption compensation coefficient according to in-
door and outdoor temperature conditions.
(i) Capacity compensation coefficient
S Cooling
=
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
0 5 10 15 20 25 30 35 40
Capacity compensation coefficient
Ambient air DB temperature(℃DB)
Indoor air WB temperature 24˚CWB
Indoor air WB temperature 22˚CWB
Indoor air WB temperature 21˚CWB
Indoor air WB temperature 20˚CWB
Indoor air WB temperature 19˚CWB
Indoor air WB temperature 18˚CWB
Indoor air WB temperature 17˚CWB
Indoor air WB temperature 16˚CWB
Indoor air WB temperature 15˚CWB
Indoor air WB temperature 14˚CWB
Indoor air WB temperature 13˚CWB
Indoor air WB temperature 12˚CWB