Solid State Starter; Oil Return System; Changing The Dehydrator; Section 5 - Operational Maintenance - York CodePak YK L1 L1 G4 Operation Manual

MICROCOMPUTER CONTROL CENTER
(See Section 2)
The MicroComputer Control Center is factory mounted,
wired and tested. The electronic panel automatically
controls the operation of the unit in meeting system
cooling requirements while minimizing energy usage.
For detailed information on the Control Center, refer to
"Section 2" of this manual.

OIL RETURN SYSTEM

The oil return system continuously maintains the proper
oil level in the compressor oil sump. (See Figs. 18 &
19.)
High pressure condenser gas flows continuously
through the eductor inducing the low pressure, oil rich
liquid to flow from the evaporator, through the dehydra-
tor to the compressor sump.

CHANGING THE DEHYDRATOR

To change the dehydrator, use the following procedure:
1. Shut the stop valves on the condenser gas line, oil
FIG. 19 – OIL RETURN SYSTEM
YORK INTERNATIONAL
SECTION 5
OPERATIONAL MAINTENANCE
SOLID STATE STARTER (Optional)
The Solid State Starter is a reduced voltage starter
that controls and maintains a constant current flow to
the motor during start-up. It is mounted on the chiller.
Power and control wiring between the starter and chiller
are factory installed. Available for 380-600 volts, the
starter enclosure is NEMA-1 with a hinged access door
with lock and key. Electrical lugs for incoming power
wiring are provided.
return line to rotor support and inlet end of the de-
hydrator.
2. Remove the dehydrator. Refer to Fig. 19.
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.
FORM 160.49-O1
LD01080
39