Installation Instruction; Pipe Length - Panasonic CU-J50DBE8 Service Manual

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.
Model No.
R CS-F24DTE5
Cassette 4 CS-F28DTE5
type 1 CS-F34DTE5
0 CS-F43DTE5
A CS-F50DTE5
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
Piping size
Liquid / Valve Gas /
High Low
9.52 3-ways 15.88
Piping Piping
length elevation
(A) (B)
Valve Max(m) Max(m)
3-ways 50 30
45
Piping Piping
elevation Chargeless
(C)
Max(m) Max(m)
20 30
Add
Refrigerant
(g/m)
50