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9 Installation Instruction
9.1. Pipe Length
9.1.1. Correction of capacities
Correction of capacities according to the connecting pipe length.
The data of rated capacities (marked on the name plate) are based on 7.5 metres connecting pipe and horizontal installation.
Note:
Piping elevation B = outdoor unit installed at top
Piping elevation C = outdoor unit installed at bottom
• Calculation 1
In case of CU-L28, 34DBE5
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-L43, 50DBE8
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)
HIDE
AWAY
TYPE
R
4
1
0
A
(HI)
CS-F24DD1E5
9.52 3-ways 15.88 3-ways 50 30 20 30 50
CS-F28DD1E5
CS-F34DD1E5
CS-F43DD1E5
CS-F50MD1E5
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