20 Chapter 3 Mechanical Installation
Liebert.CRV+ Series Air Cooled Precision Air Conditioner User Manual
Table 3-7 Standard refrigerant charging amount of outdoor unit (unit: kg)
Indoor unit model CR025 CR035
Outdoor unit model LSF32 LSF38 LSF42 LSF42 LSF52 LSF76
Outdoor temperature 35°C 40°C 45°C 35°C 40°C 45°C
Standard charging amount
3.24 3.93 4.45 4.3 5.73 6.39
Table 3-8 Standard refrigerant charging amount of indoor unit (unit: kg)
Indoor unit model CR025 CR035
Standard charging amount 4.52 5.24
Table 3-9 Standard refrigerant charging amount for 10m connecting pipe system
Indoor unit model
Charging amount
CR025 CR035
Outdoor unit model LSF32 LSF38 LSF42 LSF42 LSF52 LSF76
Charging amount of connecting pipe
between indoor unit and outdoor unit
1.07 1.74
Standard charging amount 8.83 9.52 10.04 11.28 12.71 13.37
Note:
1. If the outdoor unit model is different from the recommended one, you need to recalculate the system standard charging
amount acording to the given data.
2. If the connection pipe between the indoor unit and the outdoor unit is longer than 10m, you need to recalculate and refill the
refrigerant to the system
The refilling amount of the refrigerant is calculated through the following formula:
Refrigerant refilling amount (kg) = Standard refrigerant charging amount of indoor unit+ refrigerant refilling amount of
per meter liquid pipe (kg/m) × total length of extended liquid pipe (m)
See Table 3-10 for refrigerant refilling amount of each meter liquid pipe.
Total length of extended liquid pipe (m) = Total length of liquid pipe (m) - 10m
Table 3-10 Refrigerant refilling amount of per meter liquid pipe with different ODs
Liquid pipe OD (mm)
Refrigerant refilling amount of per
meter liquid pipe (kg/m)
Liquid pipe OD (mm)
Refrigerant refilling amount of per
meter liquid pipe (kg/m)
12.7 0.107 22 0.321
16 0.174 25 0.431
19 0.245 28 -
For the refrigerant charging method, refer to 5.2.2 Commissioning Procedures.
2. Adding refrigeration oil
The refilled refrigerant will dilute the refrigeration oil in the system and affect the lubricating and cooling effects of the
refrigeration oil. Therefore, the refrigeration oil should be added. See the Table 3-11 for the refrigeration oil adding
amount.
The refrigeration oil used in the Liebert.CRV+ air conditioner is given in Table 3-12.
Note
CR025 unit uses POE type refrigeration oil, and CR035 unit uses PVE type refrigeration oil.
Consult Emerson for adding refrigeration oil.
Poor quality refrigeration oil should not be used for it can damage system;
Select the right type of refrigeration oil., and incorrect model should not be used;
For any result caused by wrongly adding of refrigeration oil, the warranty will be invalid.
To Next Page
Loading...
Need help?
General
