Capacity Correction Factor - Daikin RXYSCQ-TV1 Series Technical Data Manual

5 Capacity tables

5 - 3 Capacity Correction Factor

RXYSCQ-TV1
Correction ratio for cooling capacity
x-axis : Equivalent piping length [m]
y-axis : Height difference between outdoor unit and furthest indoor unit [m]
Notes
1. These figures illustrate the capacity correction factor due to the piping length for 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 for the capacity correction ratio, as shown it the above figures.
2. With this outdoor unit, the following control is used:
- in case of cooling: constant evaporating pressure control
- in case of heating: constant condensing pressure control
3. Method of calculating the capacity of the outdoor units.
The maximum capacity of the system will be either the total capacity of the indoor units or the maximum capacity of the outdoor units as mentioned below, whichever is less.
Indoor connection ratio 100%.
Maximum capacity of outdoor units =
Indoor connection ratio > 100%.
Maximum capacity of outdoor units
=
4. When the overall equivalent piping length is 90 m or more, the diameter of the main gas pipes (outdoor unit - branch sections) must be increased.
For the new diameters, see below.
Model Standard liquid side Ø
RXYSCQ4TMV1B
9,5
RXYSCQ5TMV1B
5. Overall equivalent length
Overall equivalent length =
Choose the correction factor from the following table.
When calculating the cooling capacity: gas pipe size
When calculating the heating capacity: liquid pipe size
Standard size
Cooling (gas pipe) 1,0
Heating (liquid pipe) 1,0
Example
Main gas pipe Equivalent length of the branch pipe of the furthest
Main liquid pipe
80 m
• Outdoor Unit • RXYSCQ-TV1
Correction ratio for heating capacity
x-axis : Equivalent piping length [m]
y-axis : Height difference between outdoor unit and furthest indoor unit [m]
Capacity of outdoor units from capacity table at 100% connection ratio.
Capacity of outdoor units from capacity table at installed connection ratio.
Increased liquid side Ø
Not increased
Equivalent length of the main pipe x Correction factor
Size increase
0,5
0,5
indoor unit Overall equivalent length
Cooling mode
40 m
Heating mode
Capacity correction ratio (height difference = 0)
Cooling mode
Heating mode
• VRV Systems • RXYSCQ-TV1
x Correction ratio of piping to furthest indoor unit
x Correction ratio of piping to furthest indoor unit
Standard gas side Ø Increased gas side Ø
15,9 19,1
+ Equivalent length of the branch pipes
= 80 m x 0,5 + 40 m = 80 m
= 80 m x 0,5 + 40 m = 80 m
= 0,78
= 1,0
3
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3D094660
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