Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 238

• Models FDC100 140
<Single type>
Item
Standard refrigerant
charge volume (kg)
Model
FDC100
FDC125
2.0
FDC140
<Twin, triple, W-twin type>
Item
Standard refrigerant
charge volume (kg)
Model
FDC100
FDC125
2.0
FDC140
• A standard refrigerant charge volume means a refrigerant charge volume for an installation with 0m long refrigerant piping.
• This unit contains factory charged refrigerant covering 30m of refrigerant piping and additional refrigerant charge on the installation site
is not required for an installation with up to 30m refrigerant piping.
When refrigerant piping exceeds 30m, additionally charge an amount calculated from the pipe length and the above table for the portion
in excess of 30m.
• When refrigerant piping is shoter than 3m, reduce refrigerant by 1kg from factory charged volume and adjust to 2.8kg.
If an existing pipe system is used, a required refrigerant charge volume will vary depending on the liquid pipe size.
Formula to calculate the volume of additional refrigerant required
Additional charge volume (kg) = { Main pipe length (m) – Length covered without additional charge 30 (m) } × 0.06 (kg/m) + Total length of branch pipes (m) × 0.06 (kg/m)
FDC100 140
Note (1) When an additional charge volume calculation result is negative, it is not necessary to charge refrigerant additionally.
• To charge refrigerant again, recover refrigerant from the system first and then charge the volume calculated from the above table.
(Standard refrigerant charge volume + branch pipes charge volume)
• Models FDC200, 250
<Single type>
Item
Standard refrigerant
charge volume (kg)
Model
FDC200
3.6
FDC250
<Twin, triple, W-twin type>
Item
Standard refrigerant
charge volume (kg)
Model
FDC200
3.6
FDC250
• A standard refrigerant charge volume means a refrigerant charge volume for an installation with 0m long refrigerant piping.
• This unit contains factory charged refrigerant covering 30m of refrigerant piping and additional refrigerant charge on the installation site
is not required for an installation with up to 30m refrigerant piping.
When refrigerant piping exceeds 30m, additionally charge an amount calculated from the pipe length and the above table for the portion
in excess of 30m.
• When refrigerant piping is shoter than 3m, reduce refrigerant by 1kg from factory charged volume and adjust to 4.4kg(FDC200) or
6.2kg(FDC 250).
• If an existing pipe system is used, a required refrigerant charge volume will vary depending on the liquid pipe size.
Formula to calculate the volume of additional refrigerant required
In the case of φ9.52mm
liquid piping
FDC200
In the case of φ12.7mm
liquid piping
FDC250
Note (1) When an additional charge volume calculation result is negative, it is not necessary to charge refrigerant additionally.
• To charge refrigerant again, recover refrigerant from the system first and then charge the volume calculated from the above table.
(Standard refrigerant charge volume + branch pipes charge volume)
Pipe length for Additional charge volume (kg)
standard refrigerant per meter of refrigerant piping
charge volume (m) (liquid pipe)
0 0.06
Additional charge volume (kg)
Pipe length for
per meter of refrigerant piping
standard refrigerant
(liquid pipe)
charge volume (m)
Main pipe Branch pipe
0 0.06
Pipe length for Additional charge volume (kg)
standard refrigerant per meter of refrigerant piping
charge volume (m) (liquid pipe)
0.06 (Liquid piping φ9.52)
0.12 (Liquid piping φ12.7)
0
0.12
Additional charge volume (kg)
Pipe length for
per meter of refrigerant piping
standard refrigerant
(liquid pipe)
charge volume (m)
Main pipe Branch pipe
0.06 (Liquid piping φ9.52)
0.12 (Liquid piping φ12.7)
0
0.12
Additional charge volume (kg) = { Main pipe length (m) - Length covered without additional charge 30 (m) } × 0.06 (kg/m) +
Total length of branch pipes (m) × 0.06 (kg/m)
Additional charge volume (kg) = { Main pipe length (m) - Length covered without additional charge 30 (m) } × 0.12 (kg/m) +
Total length of branch pipes (m) × 0.06 (kg/m)
Refrigerant volume Installation's pipe length (m)
charged for shipment covered without additional
at the factory (kg) refrigerant charge
3.8
Refrigerant volume Installation's pipe length (m)
charged for shipment covered without additional
at the factory (kg) refrigerant charge
3.8
Refrigerant volume Installation's pipe length (m)
charged for shipment covered without additional
at the factory (kg) refrigerant charge
5.4
7.2
Refrigerant volume Installation's pipe length (m)
charged for shipment covered without additional
at the factory (kg) refrigerant charge
5.4
0.06 7.2
229
- -
30
30
30
30