Section 4 - Operational Maintenance; Oil Return System; Changing The Dehydrator; Figure 7 - Oil Return System - York YD A Operating & Maintenance

FORM 160.69-O2
ISSUE DATE: 9/30/2020
SECTION 4 – OPERATIONAL MAINTENANCE

OIL RETURN SYSTEM

The oil return system continuously maintains the prop-
er oil level in the compressor oil sump.
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.
SOLENOID VALVE

FIGURE 7 - OIL RETURN SYSTEM

JOHNSON CONTROLS

CHANGING THE DEHYDRATOR

To change the dehydrator, use the following procedure:
1. Shut the stop valves on the condenser gas line, oil
return line to rotor support and inlet end of the
dehydrator.
2. Remove the dehydrator. Refer to Figure 7 on page
35.
3. Assemble the new filter-drier.
4. Open condenser stop valve and check dehydrator
connections for refrigerant leaks.
5. Open all the dehydrator stop valves to allow the
liquid refrigerant to flow through the dehydrator
and condenser-gas through the eductor.
COMPRESSOR
CHECK VALVE
STOP VALVE
OIL EDUCTOR BLOCK
SOLENOID VALVE
DEHYDRATOR
STOP VALVE
LD08578
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