Weekly Maintenance; Check The Lubrication System - Carrier 17/19EX Start-Up, Operation And Maintenance Instructions Manual

Check the Lubrication System

Mark the oil level on the reservoir sight glass, and observe the level each week while the
machine is shut down.
If the level goes below the lower sight glass, the oil reclaim system will need to be checked
for proper operation. If additional oil is required, add oil as follows:
On hermetic machines, add oil through the oil drain charging valve
pump is required for adding oil against refrigerant pressure. On open-drive machines, oil may
be added through the oil drain and charging valve
an oil charging elbow on the seal-oil return chamber
pumping. The seal oil return pump automatically transfers the oil to the main oil reservoir. A
pump is required for adding oil against refrigerant pressure. The oil charge is approximately
15 gallons (57 L) for EX and FA (size 421-469) style compressors; 20 gallons (76 L) for EA (size
531-599) style compressors. The added oil must meet Carrier's specifications. Refer to
Changing Oil Filter and
by noting the amount and date. Any oil that is added due to oil loss that is not related to service
will eventually return to the sump, and must be removed when the level is high.
An oil heater is controlled by the PIC to maintain oil temperature above 150 F (65.5 C) or
refrigerant temperature plus 70° F (38.9° C) (see the

Weekly Maintenance

Oil Changes sections. Any additional oil that is added should be logged
(Figure
(Figure 2, Item 18) using a pump. However,
(Figure 6) allows oil to be added without
Controls section) when the compressor is
3, Item 26.) A