Panasonic CS-F24DTE5, Service Manual, Page: 45 / 145

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10 Installation Instruction
10.1. Pipe length
• CORRECTION OF CAPACITIES
1. Correction of capacities according to the connecting pipe length.
The data of rated capacities (marked on the name plate) are based on 7.5 meters connecting pipe and horizontal installation.
2. For other pipe length of other installation multiply by the following correction factor to determine the revised cooling capacity.
Note:
Piping elevation B = outdoor unit installed at top
Piping elevation C = outdoor unit installed at bottom
• Calculation 1
In case of CU-J28DBE5, CU-J28DBE8, CU-J34DBE5, CU-J34DBE8
When pipe length exceed 30m calculated by formula 1, adding refrigerant amount should be calculated by formula 2. If
calculation result is less than 30m, it is not necessary to add refrigerant.
Pipe length = main pipe + (branch pipe La + branch pipe Lb)/2.78...formula 1
Add refrigerant = (main pipe + (branch pipe La + branch pipe Lb)/2.78-30) * 50...formula 2
• Calculation 2
In case of CU-J43DBE8, CU-J50DBE8
When pipe length exceed 30m calculated by formula 3, adding refrigerant amount should be calculated by formula 4. If
calculation result is less than 30m, it is not necessary to add refrigerant.
Pipe length = main pipe + branch pipe La + branch pipe Lb... formula 3
Add refrigerant = (main pipe + branch pipe La + branch pipe Lb-30) * 50...formula 4
Piping Size / Length & Elevation
Model No. Piping size Piping
length
(A)
Piping
elevation
(B)
Piping
elevation
(C)
Piping
Chargeless
Add
Refrigerant
Liquid /
High
Valve Gas /
Low
Valve Max(m) Max(m) Max(m) Max(m) (g/m)
R CS-F24DTE5
Cassette 4 CS-F28DTE5
type 1 CS-F34DTE5 9.52 3-ways 15.88 3-ways 50 30 20 30 50
0 CS-F43DTE5
A CS-F50DTE5