York Millennium YCAJ150, Installation Operation & Maintenance, Page: 87 / 116

FORM 150.65-NM4
87 YORK INTERNATIONAL
E. After pumping down the compressor, wait until
the pressure builds up to 2 or 3 PSIG (13.8 or
20.7 kPa) before opening up any part of the her-
metic compressor.
F. Open the coil drain valve slowly and drain as
much oil from the compressor as possible.
G. Examine the oil for any metal particles which
would indicate wear on the bearings, crankshaft
or connecting rods. If metal particles are found,
the need for closer examination by factory ser-
vice personnel is indicated.
H. If the oil is clean and free of metal particles, refill
the compressor with YORK oil “C”. To add oil or
to fill the compressor crankcase, connect the
delivery tube of the YORK Hand Oil Pump. YORK
Part No. 470-10654 or equal to the compressor
oil charging and drain valve. Expel all air from
the delivery tube by pumping it full of oil, allowing
a few drips to drip out before tightening the flare
nut to the oil charging valve. Then open the oil
charging valve and pump oil into the crankcase
to the proper level. It is necessary that the suc-
tion end of the hand oil pump be kept submerged
under the oil level in the container at all times, to
avoid entrance of air into the compressor.
I. Before opening the suction or discharge stop
valves, connect a vacuum pump to the pumpout
port in the discharge stop valve. (Pumpout port
is port on valve stem side of valve). With the
vacuum line shutoff valve open, run the vacuum
pump until a vacuum of at least 1000 microns is
reached. Stop the vacuum pump, close the shut-
off valve and open the discharge valve fully be-
fore disconnecting the line from the vacuum
pump. Disconnect the vacuum pump and replace
the plug in the pumpout port.
NOTE: If suction or discharge valves are not seated
properly, a 1000 micron vacuum can not be ob-
tained. Do not evacuate for long periods of time.
J. Be sure both discharge and suction stop valves
are open before operating the unit.
4. Suction and Discharge Valves and Springs - The
condition of the suction and discharge valves and
springs should be checked by YORK service per-
sonnel on a yearly basis or every 5000 hours, which-
ever comes first.