44
YORK INTERNATIONAL
THE OIL CHARGE
The nominal oil charge for the compressor is 20 gal.,
type K for R-134a application.
New YORK Refrigeration oil must be used in the cen-
trifugal compressor. Since oil absorbs moisture when
exposed to the atmosphere, it should be kept tightly
capped until used.
OIL CHARGING PROCEDURE
The compressor oil level must be maintained between
the oil reservoirs upper and lower sight glasses. If the
oil level falls into the lower sight glass, it is necessary
to add oil to the compressor oil reservoir. The oil should
be charged into the oil reservoir using the YORK Oil
Charging Pump YORK Part No. 070-10654. To charge
oil into the oil reservoir, proceed as follows:
1. The unit must be shut down.
2. Immerse the suction connection of the oil charging
pump in a clean container of new oil and connect
the pump discharge connection to the oil charging
valve (A) located on the remote oil reservoir cover
plate. (See Fig. 20.) Do not tighten the connection
at the charging valve until after the air is forced out
by pumping a few strokes of the oil pump. This fills
the lines with oil and prevents air from being pumped
into the system.
3. Open the oil charging valve and pump oil into the
system until oil level in the compressor oil reservoir
is about midway in the upper sight glass. Then, close
the charging valve and disconnect the hand oil
pump.
4. As soon as oil charging is complete, close the power
supply to the starter to energize the oil heater. (See
Section 3, System Operating Procedures.) This
will keep the concentration of refrigerant in the oil
to a minimum.
When the oil reservoir is initially charged with oil, the
oil pump should be started manually to fill the lines,
passages, oil cooler and oil filter. This will lower the oil
level in the reservoir. It will then be necessary to add
oil to bring the level back to the center of the upper
sight glass.
FIG. 20
CHARGING OIL RESERVOIR WITH OIL
LD00472
OIL CHARGING
VALVE
25721A