Mechanical Installation
Vertiv | Liebert CRD10 | User Manual
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when the liquid pipe length of the connection between the indoor unit and the outdoor unit is shorter than
30m(98.4ft.), and the system is not equipped with Low Ambient Kit, then the additional refrigerant oil
charging is not needed, alternatively, the base refrigerant oil charging is 1000ml(33.8oz). when the liquid
pipe length of the connection between the indoor unit and the outdoor unit is longer than 30m(98.4ft.), the
extra additional refrigerant oil charging is b ml/oz. The filling amount of the extra additional refrigerant oil(b)
is calculated using the following formula:
The filling amount of the refrigerant is calculated using the following formula:
Table 3-10 Refrigerant charge required per meter (foot) of liquid pipe
Liquid Pipe Diameter ×Thickness (mm(in.))
Unit length refrigerant addition amount (kg/m(lb/ft))
12.7(1/2)×1(0.04)
0.107/0.0719
16(5/8)×1(0.04)
0.145/0.0974
If the liquid pipe length of the connection between the indoor unit and the outdoor unit is shorter than
10m(32.8ft.), the refrigerant is charged according to the base refrigerant charge. Table 3-11 is the quick
check list of refrigerant and oil filling amount.
NOTES:
•
The unit has been added 1270ml of basic refrigerant oil in factory. So the installation site only needs to
charge with an additional mount of refrigerant oil b ml(oz) when without Low Ambient Kit, if equipped
with Low Ambient Kit, the oil charging amount is 1000ml(33.8oz) + b ml(oz).
•
The unit did not charge with refrigerant in the factory, and the total amount of refrigerant c kg(lb)
needs to be charged on site installation.
•
Refill the oil from the schrader valve of the liquid pipe ball valve.
•
Select the right make and type of refrigeration oil depending on the model. Do not use poor quality
refrigeration oil as it can damage the system.
•
If any error or damage occurs due to usage of the incorrect make and type of oil, the warranty will be
void.
Value
b
(ml) = Refrigerant filling amount of per meter liquid pipe (kg/m) × [ Total length of liquid pipe (m)-
30m] ×1000 ×25%
Value
b
(oz) = Refrigerant filling amount of per meter liquid pipe (lb/ft) × [ Total length of liquid pipe (ft)-
98.4ft] ×3.84
Refrigerant filling amount
c
(kg) = Base Refrigerant Charge(kg) + Refrigerant filling amount of per meter
liquid pipe (kg/m) × [ Total length of liquid pipe (m)-10(m)]
Refrigerant filling amount
c
(lb) = Base Refrigerant Charge(lb) + Refrigerant filling amount of per meter
liquid pipe (lb/ft) × [ Total length of liquid pipe (ft)-32.8(ft)]
