mycom 280J

2205B0JE-DA-J-N_2014.05.
3 Installation
Screw Compressor J-series 3.2 Installation Work
3-8
3. Charge lubricant from the drain valve on the oil cooler (or on the oil filter) through the compressor
to the oil separator.
4. When the oil level reaches to the lower limit of the oil level gauge in the oil separator, stop the
charging from the oil supply line. (The approximate amount of refrigerant oil charge is the
combined capacity of the oil cooler and oil filter plus at least 20 liter).
5. Then charge oil to the specified level from the oil charging valve on oil separator.
6. Start the oil pump and check the oil pump discharge pressure to confirm that the lubricant flows.
When possible, check if the oil level on the oil separator lowers.
7. Adjust the differential pressure between the oil pump discharge and the suction pressure.
(Specified differential pressure: 0.2±0.05 MPa). Refer to "2.3 Compressor Specifications" in this
manual chapter 2.
8. After adjusting the differential pressure, run the oil pump for 2 minutes. After checking that the
motor main power is off, turn the compressor driving shaft manually. About 10 turns using a
coupling.
9. If lubricant flows through the oil supply line normally after the above works, the initial lubricant
charge is completed.
 After the initial charge of lubricant, make sure that the oil cooler and oil filter are filled with
lubricant.
 For lubricant to be used, refer to "4.1 Lubricant (Refrigerant Oil)" in this manual chapter 4.
 For the amount of initial lubricant charge, refer to the package instruction manual.
3.2.7.2 Additional Charge of Lubricant Procedure
For additional charge of lubricant during operation the procedures of charging defer depending on the
systems and operating conditions therefore follow the procedures described in the instruction manual
of the unit.
 For additional lubricant charge, always use the same brand of oil with the same
viscosity grade as that already charged in the package. The use of any other
brand or viscosity grade may cause operation problems.
3.2.8 Charging of Refrigerant
As with the lubricant charge, charging of the refrigerant must be performed carefully so that no moisture
or air enters the system.
For further details on refrigerant charging works, refer to the package or refrigeration unit instruction
manual.
3.2.9 Check after Installation
Perform the checks after compressor installation according to the check list in the package instruction
manual.