FORM 160.55-O1 (920)
135
YORK INTERNATIONAL
SECTION 6
OPERATIONAL MAINTENANCE
OIL RETURN SYSTEM
6
OIL RETURN
The oil return system continuously maintains the proper
oil level in the compressor oil sump. (See Fig. 57.)
High pressure condenser gas flows continuously through
the eductor inducing the low pressure, oil rich liquid to
flow from the evaporator, through the dehydrator to the
compressor sump.
CHANGING THE DEHYDRATOR
To change the dehydrator use the following proce-
dure:
1. Shut the stop valves on the condenser gas line, oil
return line to rotor support and inlet end of dehy-
drator.
2. Remove the dehydrator as follows: Refer to Fig.
58.
a. Remove connection on the inlet end of dehy-
drator.
b. Place wrenches on the dehydrator outlet and inlet
ends and the flare nut. Loosen the flare nut and
unscrew the dehydrator.
3. Assemble the new filter-drier as follows:
a. Place the outlet and inlet ends of the dehydrator
between the flare nuts.
b. Tighten the flare nuts.
4. Open condenser stop valve and check dehydrator
connections for refrigerant leaks.
5. Open all the dehydrator stop valves to allow the liq-
uid refrigerant to flow through the dehydrator and
condenser-gas through the eductor.
FIG. 60
– OIL RETURN SYSTEM
LD00469
22621A(D)
