Removing Transportation Fastener And Vibration Absorber - Liebert CRV+ Series User Manual

18 Chapter 2 Mechanical Installation
Charging amount
Outdoor unit model
Charging amount of connecting pipe
between indoor unit and outdoor unit
Standard charging amount
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) = refrigerant refilling amount of per meter liquid pipe (kg/m) × total length of extended
liquid pipe (m)
See Table 2-11 for refrigerant refilling amount of each meter liquid pipe.
Total length of extended liquid pipe (m) = Total length of liquid pipe (m) - 10m
Liquid pipe OD (mm)
12.7
16
19
For the refrigerant charging method, refer to 4.2.2 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 formula below:
Amount of refrigeration oil (L) to be added = refrigerant refilling amount (kg) × 0.1
The refrigeration oil used in the Liebert CRV+ air conditioner are given in Table 2-12.
Unit model
CR025
CR035

2.6 Removing Transportation Fastener And Vibration Absorber

To protect partial components from damaging and distorting due to bumping, impact and resonation, fasteners and
vibration absorbers are mounted at certain locations before delivery. Remove the fasteners and vibration absorbers
before installation and commissioning.
Removing pipe fixity
To prevent long copper pipe from getting close to metal plate and thus causing wearing and crack of the copper pipe,
vibration absorbing foams are fitted between them. Remove these objects and do cleaning before installation and
commissioning.
Removing limiting piece of electrical control box
To prevent the electrical control box from moving during transportation, a limiting piece of electrical control box is
installed before delivery. You need to remove the limiting piece before operating the unit, so you can slide out the
electrical control box during maintenance.
Table 2-10 Standard refrigerant charging amount for 10m connecting pipe system
Indoor unit model
LSF32
8.83
Table 2-11 Refrigerant refilling amount of per meter liquid pipe with different ODs
Refrigerant refilling amount of per
meter liquid pipe (kg/m)
0.107
0.174
0.245
Table 2-12 Types of refrigeration oil
Types of refrigeration oil
POE
PVE
Liebert CRV+ Series Air Conditioner User Manual
CR025
LSF38 LSF42
1.07
9.52 10.04
Liquid pipe OD (mm)
22
25
28
Parker Emkarate RL32-3MAF/(Virginia) LE32-3MAF
Copeland® Ultra 32-3MAF
Lubrizol Emkarate RL32-3MAF
NuCalgon 4314-66 (Emkarate RL32-3MAF)
Idemitsu FVC68D
CR035
LSF42 LSF52
1.74
11.28 12.71
Refrigerant refilling amount of per
meter liquid pipe (kg/m)
0.321
0.431
-
Brand and type
LSF76
13.37