10.1. Pipe length
10 INSTALLATION INSTRUCTION
10.1.1. 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.
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-F24DD2E5
HIDE 4 CS-F28DD2E5
AWAY 1 (Me) CS-F34DD2E5 9.52 3-ways 15.88 3-ways 50 30 20 30 50
TYPE 0 CS-F43DD2E5
A CS-F50DD2E5
Note :
Piping elevation B = outdoor unit installed at top
Piping elevation C = outdoor unit installed at bottom
•
Calculation 1
In case of CU-B28DBE5, B28DBE8, B34DBE5, B34DBE8
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-B43DBE8, B50DBE8
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
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