Panasonic CS-F24DTE5 / CU-L24DBE5 / CS-F28DTE5 / CU-L28DBE5 / CS-F34DTE5 / CU-L34DBE5 / CS-F43DTE5 / CU-L43DBE5 / CS-F50DTE5 / CU-L50DBE8 Service Manual ▷ View online
9.11. Pump down operation
• When pushing the [PUMP DOWN] button on the outdoor PCB for 1 second, pump down operation start. Detail of pump down
operation is shown at below table.
• During pump down operation, push the [PUMP DOWN] button once again for 1 second, pump down operation stop.
• After 600[Sec] past, pump down operation stop.
• After 600[Sec] past, pump down operation stop.
37
10 Installation Instruction
10.1. Pipe length
• CORRECTION OF CAPACITIES
1. Correction of capacities according to the connecting pipe length.
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.
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
Ceiling
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
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.
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.
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
38
39
10.2. Refrigerant additional charge
1. Piping installation by standard piping
• At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30 m.
(Refer the following table)
But when the piping length exceeds 30m, additional charge is required according to the following table.
Example:
CU-L24DBE5
In case of 50m long pipe (one way), the amount of refrigerant to be replenished is: (50 - 30) x 50 = 1,000g
Model Name
Standard piping specification
Liquid piping
(dia.mm)
Gas piping
(dia.mm)
Gas chargeless
length (m)
Additional gas
volume (g/m)
CU-L24DBE5
9.52
15.88
30
50
CU-L28DBE5
9.52
15.88
30
50
CU-L34DBE5
9.52
15.88
30
50
CU-L43DBE5
9.52
15.88
30
50
CU-L50DBE8
9.52
15.88
30
50
Attention
• Do not decrease the size of the gas piping. (It causes the breakdown of the compressor)
10.3. Position of the centre gravity
MODEL NAME
OUTSIDE DIMENSIONS
NET WEIGHT
CENTRE OF GRAVITY
WIDTH (mm)
DEPTH (mm)
HEIGHT (mm)
kg
X (mm)
Y (mm)
Z (mm)
CU-L24DBE5
900
320
795
71
560
150
320
CU-L28DBE5
900
320
795
71
560
150
320
CU-L34DBE5
900
320
1340
110
560
150
510
CU-L43DBE5
900
320
1340
110
560
150
510
CU-L50DBE8
900
320
1340
105
560
150
510
40
Click on the first or last page to see other CS-F24DTE5 / CU-L24DBE5 / CS-F28DTE5 / CU-L28DBE5 / CS-F34DTE5 / CU-L34DBE5 / CS-F43DTE5 / CU-L43DBE5 / CS-F50DTE5 / CU-L50DBE8 service manuals if exist.