York R123 - Manual (Page 135)

FORM 160.55-O1 (604)
135
YORK INTERNATIONAL
SECTION 6
OPERATIONAL MAINTENANCE
OIL RETURN SYSTEM
6
OIL RETURN
The oil return system con tin u ous ly main tains the prop er
oil level in the compressor oil sump. (See Fig. 57.)
High pressure condenser gas ß ows con tin u ous ly through
the eductor inducing the low pressure, oil rich liquid to
ß ow from the evaporator, through the de hy dra tor to the
com pres sor sump.
CHANGING THE DE HY DRA TOR
To change the de hy dra tor use the following proce-
dure:
1. Shut the stop valves on the condenser gas line, oil
re turn line to rotor sup port and inlet end of de hy -
dra tor.
2. Remove the de hy dra tor as follows: Refer to Fig.
58.
a. Remove connection on the inlet end of de hy -
dra tor.
b. Place wrench es on the dehydrator outlet and in let
ends and the ß are nut. Loosen the ß are nut and
unscrew the de hy dra tor.
3. Assemble the new Þ lter-drier as follows:
a. Place the outlet and inlet ends of the dehydrator
be tween the ß are nuts.
b. Tighten the ß are nuts.
4. Open condenser stop valve and check de hy dra tor
connections for refrigerant leaks.
5. Open all the de hy dra tor stop valves to allow the liq-
uid re frig er ant to ß ow through the de hy dra tor and
con dens er-gas through the eductor.
FIG. 60 – OIL RETURN SYSTEM
LD00469 22621A(D)