Daikin RXYSQ-P8Y1 Technical Data Manual page 25

4 Capacity tables
4 - 5 Capacity Correction Factor
RXYSQ6P8Y1
1. Rate of change in cooling capacity
[ Explanation of symbols ]
Hp: Level difference (m) between indoor and outdoor units
where indoor unit in inferior position
Hm: Level difference (m) between indoor and outdoor units
where indoor unit in superior position
L: Equivalent pipe length (m)
: Capacity correction factor
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 this outdoor unit, evaporating pressure constant control when cooling, and condensing pressure constant control when heating is carried out.
3. Method of calculating cooling/heating capacity (max. capacity for combination with standard indoor unit)
cooling / heating capacity =
In the case lenght of piping differs depending on the indoor unit, maximum capacity of aech unit during simultaneous operation is:
=
cooling / heating capacity
<As for RXYMQ6MV4A - RXYSQ6M7V3B - RXYMQ6MVLT - RXYMQ6PV4A, RXMQ6PVE - RXMQ6VPE - RXYSQ6P7V3B - RXYSQ6P7Y1B - RXYSQ6PA7V1B - RXYSQPA7Y1B -
RXYSQ6P8V1B - RXYSQ6P8Y1B>
4. When overall equivalent pipe length is 90m or more, the diameter of the main gas pipes (outdoor unit-branch sections) must be increased.
[ Diameter of above case ]
Model Gas
RXYSQ6P8Y1B ø 22.2
5. When the main sections of the interunit gas pip diameters are increased the overall equivalent length should be calculated as follows.
Overall equivalent length = Equivalent length to main pipe x 0,5 + Equivalent length after branching
Example: RXYSQ6P8Y1B
Equivalent length Equivalent length
80m 40m
Outdoor unit
Branch
Size increase
In the above case (Cooling)
Overall equivalent length = 80m x 0.5 + 40m = 80m
The correction factor in capacity when Hp = 0m is thus approximately 0.86
6. For RXYSQ: use these correction factors in case of vrv indoor unit.
• Outdoor Unit • VRVIII-S heat pump • RXYSQ-P8Y1
cooling / heating capacity obtained from performance characteristics table
x
cooling / heating capacity of each unit
Liquid
Not increased
Indoor unit
• VRV Systems • Outdoor Unit
2. Rate of change in heating capacity
[ Diameter of pipes ]
Model Gas
RXYSQ6P8Y1 ø 19.1
x each capacity rate of change
capacity rate of change for each piping length
Liquid
ø 9.5
3TW33642-4
3
1
4
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