York YK Series - FIGURE 10 - Oil Return System; Section 4 - Operational Maintenance; Oil Return System; Changing the Dehydrator

JOHNSON CONTROLS
21
FORM 160.76-O1
ISSUE DATE: 6/15/2015
4
SECTION 4 - OPERATIONAL MAINTENANCE
OIL RETURN SYSTEM
The oil return system continuously maintains the
proper oil level in the compressor oil sump (Refer to
Figure 10 on Page 21).
High pressure condenser gas flows continuously
through the eductor inducing the low pressure, oil rich
liquid to flow from the evaporator, through the dehy-
drator to the compressor sump.
CHANGING THE DEHYDRATOR
To change the dehydrator, use the following procedure:
1. Isolate the dehydrator at the stop valves.
2. Remove the dehydrator (Refer to Figure 10 on
Page 21).
3. Assemblethenewlter-drier.
4. Open evaporator stop valve and check dehydrator
connections for refrigerant leaks.
5. Open all the dehydrator stop valves.
OIL EDUCTOR BLOCK
SOLENOID VALVE
SOLENOID VALVE
CONDENSER
EV
APORATOR
DEHYDRATOR
STOP VALVE
STOP VALVE
CHECK VALVE
COMPRESSOR
FIGURE 10 - OIL RETURN SYSTEM
LD08578