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11.7 OIL CHARGE
The quantity and type of oil charged into the compressors are indicated in the compressor label and Technical
datasheet in the
Embraco Product Selector on www.embraco.com
Oil used with scroll compressors is Polyolester (POE) Emkarate RL32H and is applicable for all approved
refrigerants used with compressor. The initial oil charge and recharge volumes are indicated in Table
11.7.
Compressors are supplied with oil.
Systems with POE oil should not be open to the air for more than 3 minutes. Don´t
remove the suction and discharge rubber plugs until the compressor is ready to braze.
POE oil absorbs moisture from atmosphere. To remove it follow instruction in Chapter
11.2 – Moisture removal.
During the compressor running, oil is pumped out from the compressor. The system must be designed in order to
carry the oil back to the compressor; however a certain amount of oil may remain inside the system.
The minimum quantity of oil inside the compressor that guarantees the correct
lubrication is no less than half of initial oil charge volume.
Oil quantities below the minimum prescribed level will not allow the oil pumping and
will cause wear, leading to the eventual seizure of the mechanical parts.
System prototypes have to be checked for the oil remaining into the line tubes, condenser, evaporator and other
parts after running in all the expected conditions that may happen in the field, assuring that the compressor
contains in all conditions at least the quantity of oil indicated in above Table
11.7.
11.6 CHARGING PROCESS
Do not power on the compressor before charging refrigerant. Use the scale to control charge quantity. One liquid
drier is recommended to connect between refrigerant cylinder and manifold to prevent moisture into system
during charging. Connect refrigerant cylinder to both high and low side of the refrigeration system, power on the
solenoid valve if possible (do not power on the compressor at this time). Invert refrigerant cylinder if needed to
ensure only liquid can be charged into both high and low sides. Charge the refrigerant to the system as much
as needed (at least 70% of total needed). Disconnected the high side charge port, turn on the compressor, and
continue charge the liquid from the low side until the refrigerant is enough for the system.
Never close the suction service valve when compressor is running.
Table
11.7 Oil charge and recharge volume
WARNING
WARNING
WARNING
COMPRESSOR SIZE
INITIAL OIL CHARGE VOLUME (L)
RECHARGE VOLUME (L)
2-6 HP
1.4
1.25
7-13 HP
2.7
2.6
