Daikin FXL63LVE [30/56] 2 vrv capacity correction ratio

Daikin FXYCP125K7V19 [30/56] 2 vrv capacity correction ratio
6
Systems • Introduction
29
• Introduction
6 Selection procedure
6-2 VRV Capacity correction ratio
6-2-1 RSX(Y)P5L7W1
•Rate of change in cooling capacity Rate of change in heating capacity
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 figures.
2With this outdoor unit, evaporating pressure constant control when cooling, and condensing pressure constant control when heating is carried out.
3Method of calculating cooling / heating capacity (max. capacity for combination with standard indoor unit)
cooling / heating capacity = cooling / heating capacity obtained from performance characteristics table x each capacity rate of change
When piping length differs depending on the indoor unit, maximum capacity of each unit during simultaneous operation is:
cooling / heating capacity
= cooling / heating capacity of each unit x capacity rate of change for each piping length
4When overall equivalent pipe length is 90m or more the size of the main gas pipes must be increased (outdoor unit-branch sections).
[Increase in gas pipe diameters (main pipes)]
RSX(Y)P5~ø 22.2
5When the main sections of the interunit gas pipe sizes 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:
In the above case (Cooling)
Overall equivalent length = 80m x 0.5 + 40m = 80m
The correction factor in capacity when H
P
= 0m is thus approximately 0.75.
EXPLANATION OF SYMBOLS
H
P
: level difference (m) between indoor and outdoor units with indoor unit in inferior position
H
M
: level difference (m) between indoor and outdoor units with indoor unit in superior position
L: Equivalent pipe length (m)
α: Capacity correction factor
Diameters of gas pipe
RSX(Y)P5~ø 19.1
3TW24772-3A
Equivalent lengthEquivalent length
Size increase
Outdoor unit
Branch
Indoor unit

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