Engineering

EDUS181520C Capacity Tables
Multi-Split Type Air Conditioners RMXS-L Series 61
2
7.3 Capacity Correction Factor by the Length of Refrigerant Piping
7.3.1 Rate of Change in Capacity by the Main Piping Length
Rate of Change in Cooling Capacity
Rate of Change in Heating Capacity
Both case the outdoor unit is in inferior or superior to the indoor unit, the rate of change in capacity is the same.
7.3.2 Rate of Change in Capacity by Branch Piping Length
Main Piping Length (ft) 16.4 20 40 60 80 100 120 140 160 180
Rate of Change in Cooling Capacity 100.0% 99.7% 98.0% 96.4% 94.8% 93.4% 91.9% 90.6% 89.3% 88.1%
Main Piping Length (ft) 16.4 20 40 60 80 100 120 140 160 180
Rate of Change in Heating Capacity 100.0% 99.9% 99.3% 98.8% 98.2% 97.7% 97.2% 96.6% 96.1% 95.6%
84%
86%
88%
90%
92%
94%
96%
98%
100%
Rate of Change in Capacity (%)
Main Piping Length Rate of Change in Capacity
0 16.4 40 60 80 100 120 140 160 180
Main Piping Length: L1 (ft)
Rate of Change in Cooling Capacity
Rate of Change in Heating Capacity
1. Refrigerant Piping Connection Diameter 2. Refrigerant Piping Connection Diameter
liquid: φ 1/4 inch (φ 6.4 mm) liquid: φ 1/4 inch (φ 6.4 mm)
gas : φ 5/8 inch (φ 15.9 mm) gas : φ 1/2 inch (φ12.7 mm)
Branch Piping
length (ft)
Rate of Change in Capacity
Branch Piping
length (ft)
Rate of Change in Capacity
Cooling Heating Cooling Heating
9.8 100.0% 100.0% 9.8 100.0% 100.0%
20.0 99.4% 99.8% 20.0 98.6% 99.2%
30.0 98.8% 99.7% 30.0 97.3% 98.4%
40.0 98.3% 99.5% 40.0 96.0% 97.7%
49.0 97.9% 99.3% 49.0 94.8% 97.0%
3. Refrigerant Piping Connection Diameter
liquid: φ 1/4 inch (φ 6.4 mm)
gas : φ 3/8 inch (φ 9.5 mm) Piping size for field connection
Branch Piping
length (ft)
Rate of Change in Capacity Class (Btu/h) Liquid Gas
Cooling Heating 7,000
φ 1/4 inch
(φ 6.4 mm)
φ 3/8 inch
(φ 9.5 mm)
9.8 100.0% 100.0% 9,000
20.0 96.9% 98.2% 12,000
30.0 94.1% 96.5% 15,000
φ 1/2 inch
(φ 12.7 mm)
40.0 91.5% 94.9% 18,000
49.0 89.3% 93.5% 24,000
φ 5/8 inch
(φ 15.9 mm)