Capacity Correction Factor - Daikin RXYSQ-P8Y1 Technical Data Manual

4 Capacity tables

4 - 5 Capacity Correction Factor

RXYSQ-P8Y1 - for combination with RA and Sky Air indoor units
Capacity Correction Factor by the Length of Refrigerant Piping
Rate of Change in Capacity by the Main Piping Length
Rate of Change in Cooling Capacity
Main Piping Length
Rate of Change in Cooling Capacity
Rate of Change in Heating Capacity
Main Piping Length
Rate of Change in Heating Capacity
Main Piping Length Rate of Change in Capacity
100%
98%
96%
94%
92%
90%
88%
86%
84%
82%
80%
0 5 10
Both cases outdoor unit in inferior or superior for indoor unit, the rate of change in capacity is same
Rate of Change in Capacity by Branch Piping Length
(1) Refrigerant Piping Connection Diameter
liquid ø 6.4
gas ø 15.9
Rate of Change in Capacity
piping length Cooling Heating
3 100.0% 100.0%
5 99.6% 99.9%
10 98.7% 99.6%
15 97.9% 99.3%
(3) Refrigerant Piping Connection Diameter
liquid ø 6.4
gas ø 9.5
Rate of Change in Capacity
piping length Cooling Heating
3 100.0% 100.0%
5 98.0% 98.8%
10 93.4% 96.0%
15 89.3% 93.5%
(1) Refrigerant Piping Connection Diameter
liquid ø 6.4 gas ø 15.9
Branch Piping Length L2 (m)
[ Method of calculating cooling/heating capacity ]
Total capacity from capacity tables x (Rate of change in capacity by main piping length x Rate of change in capacity by branch piping length)
NOTES
1. These figures illustrate the rate of change in capacity of a standard indoor unit system at maximum load (with the thermostat set to
maximum) under standard conditions.
Moreover, under partial load conditions there is only a minor deviation from the rate of change in capacity shown in the above fi gures.
2. With the outdoor unit, evaporating pressure constant control when cooling and condensing pressure constant control when heating is
carried out.
3. For RXYSQ: use these correction factors in case of installation with bp unit.
• Outdoor Unit • VRVIII-S heat pump • RXYSQ-P8Y1
5 10 15 20
100.0% 98.6% 97.2% 95.9%
5 10 15 20
100.0% 99.5% 99.1% 98.6%
Rate of Change in Cooling Capacity
Rate of Change in Heating Capacity
15 20 25 30 35
Main Piping Length L1 (m)
(2) Refrigerant Piping Connection Diameter
liquid
gas
piping length
3
5
10
15
Piping size for field connection (mm)
15
20
25
Class
35
(kW)
50
60
71
(2) Refrigerant Piping Connection Diameter
Cooling
liquid ø 6.4 gas ø 12.7
Heating
• VRV Systems • Outdoor Unit
25 30 35 40 45
94.7% 93.5% 92.3% 91.2% 90.1%
25 30 35 40 45
98.2% 97.7% 97.3% 96.9% 96.4%
40 45 50 55
ø 6.4
ø 12.7
Rate of Change in Capacity
Cooling Heating
100.0% 100.0%
99.1% 99.5%
96.9% 98.2%
94.8% 97.0%
RA SA
Liquid Gas Liquid Gas
ø 9.5
ø 9.5
ø 6.4
ø 6.4
ø 12.7
ø 15.9
ø 15.9 ø 9.5
Cooling
Heating
Branch Piping Length L2 (m)
50 55
89.1% 88.1%
50 55
96.0% 95.6%
(3) Refrigerant Piping Connection Diameter
liquid ø 6.4 gas ø 9.5
Branch Piping Length L2 (m)
3TW33622-5A
[ System layout of piping ] Piping length: L1=5m L2=3m
L1
L2
Outdoor unit
5m
3m
BP unit
3
1
4
Cooling
Heating
Indoor unit
21