Johnson Controls York YKEP, Эксплуатация и обслуживание

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JOHNSON CONTROLS
19
FORM 160.77-O1
ISSUE DATE: 10/22/2020
SECTION 3 - MAINTENANCE
RENEWAL PARTS
For any required Renewal Parts, refer to the YKEP Unit
Renewal Parts Manual (Form 160.77-RP1).
OIL RETURN SYSTEM
The oil return system continuously maintains the prop-
er oil level in the compressor oil sump (See Figure 8
on Page 19 ).
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 8 on Page
19
).
3. Assemble the new filter-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
DEHYDRATOR
STOP VALVE
STOP VALVE
CHECK VALVE
COMPRESSOR
LD08578
FIGURE 8 - OIL RETURN SYSTEM
3