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Vertiv I Liebert LPC I User Manual
perform the vacuuming operation. The flow of the refrigerant to LPC units is metered by a
solenoid valve equipped with a desiccant.
Ensure that the power to the unit is activated when the electronic expansion
valve is in an open position.
3.1.5 Adding refrigerant oil
LPC air conditioner uses R410A refrigerant, POE refrigeration oil. Adding refrigerant will
cause dilution of the system refrigerant oil and lubrication properties but the cooling
performance of depends on the quantity of refrigerant oil added to the system.
It is necessary to add lubrication oil to the system based on the details in the table 3.1 below:
Table 3.1
Liquid pipe diameter
(mm)
L1015
Within 50m > 50m
12.7
No supplemental
refrigeration oil
= The amount of additional refrigerant oil even
beyond
the tube portion 50m supplemental amount
of refrigerant × 10%
16
19
16
19
22
3.1.6 The amount of refrigerant charge
LPS units are shipped from the factory with a pre-charged nitrogen gas at 2 bar pressure
before packaging. To calculate the amount of refrigerant gas required for LPC units refer
table 3.2. The system refrigerant charge depends on the configuration selected and the
length of the piping between the indoor and the outdoor units. If the piping length between
the indoor and outdoor unit exceed 10m refer table 3.3 for the quantity of additional
refrigerant to be charged in the system for proper functioning.
Table 3.2 Standard amount of refrigerant charge
Indoor Model L1015
Outdoor Model
LSF24 LSF32
Outdoor temperature
40
45
Standard filling amount (Unit: kg)
6.4 9.5
Note: The standard refers to an amount of charge indoor outdoor + charge amount to suit a piping
length upto 10m.
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