Appendix 2 Technical Data Tables 53
Liebert.CRV Series Air Conditioner User Manual
Table 4 Calibrations of electrical components
No.
Component
Setting
Notes
Contact
1
High pressure transducer
Range: 0 ~ 45barg
Output: 0 ~ 5V
See iCom manual
-
2
Low pressure transducer
Range: 0 ~ 17.3barg
Output: 0 ~ 5V
See iCom manual
-
3
High pressure switch (HP)
Stop: 37.0
±
1barg
Start: 30.0
±
1.5barg
(Fixed setting – manual reset)
Reset
Normally closed
4
Clogged filter differential
pressure switch (CF)
Set point range: 0.5mbar ~
4mbar
Filter G4 = 2mbar
Setting
ring
Normally closed
Table 5 R410A refrigerant and oil charge for air cooled models (A type)
Model
Base
refrigerant
charge (kg)
Base oil charge*
(oil within compressor, kg)
Max. system refrigerant
charge before oil
addition (kg)
Weight of oil to add for every
4.5kg of refrigerant over Max.
system charge (g)
Initial oil charge
Max. topping up
CR020RA
5.9
1.68
1.57
17.1
44.8
CR035RA
10
3.08
2.97
12.6
112.0
Note*:
The recommended oil is EMKARATE RL 32-3MA
Table 6 Refrigerant charge of pipeline for air cooled models
External pipe diameter
(mm)
R410A gas
（
kg/m
）
At different condensing temperatures, R410A liquid* (kg/m)
35°C
46°C
57°C
12 × 1
-
0.08
0.07
0.07
16 × 1
0.0169
0.16
0.14
0.13
19 × 1.2
0.0221
0.20
0.19
0.17
22 × 1.2
0.0346
-
-
-
28 × 1.2
0.0584
-
-
-
Note*:
Liquid pressure and density varies according to condensing temperature
The distance of pipeline for air cooled models is shown in Figure 4.
Air conditioner
Condenser
a
b
c
Pipeline from conditioner to air condenser
Distance (D) = a + b + c
Figure 4 Distance of pipeline
