Vertiv Liebert CRV Plus - Page 43

Vertiv | Liebert CRV+ | User Manual 33
refrigerant according to the system configuration and the length of the connection pipes between the
indoor and outdoor unit.
The tables in Listing 2.7 depict the recommended charging amount of the outdoor unit and the
recommended charging amount for the indoor unit.
Listing 2.7
Recommended refrigerant charging amount of the outdoor unit
Outdoor unit model
LSF 12
LSF32
LSF38
LSF42
LSF52
LSF76
Recommended charging amount
2.44
3.24
3.93
4.4
5.73
6.39
Recommended refrigerant charging amount of the indoor unit
Indoor unit model
CR012
CR025
CR035
Standard charging amount
2.41
4.52
5.24
The refilling amount of the refrigerant is calculated using the following formula:
Refrigerant refilling amount (kg) = Recommended refrigerant charging amount of outdoor unit+
recommended refrigerant charging amount of indoor unit+ refrigerant refilling amount of per meter
liquid pipe (kg/m) × total length of liquid pipe (m)
Refer to the table in Listing 2.8 for the refrigerant refilling amount of per meter liquid pipe for different
ODs:
Listing 2.8
Liquid pipe OD (mm) Refrigerant refilling amount of per meter liquid pipe (kg/m)
12.7 0.107
16
0.174
19 0.245
22
0.321
25
0.431
28
/
The refilled refrigerant will dilute the POE oil in the system and plays a major role in the lubrication and
cooling effects of the POE oil. Thus, it is for this purpose that the refrigerant oil must be added.