Advertisement
Operation
G. If the pressure in the oil reservoir (5) is higher
than 60 psi set the auxiliary oil pump internal
relief valve higher to charge oil. Alternatively,
use the YORK Hand Oil Pump (P/N 470-
10654) to add oil through the drain valve.
H. Close valve (23) before the oil container is com-
pletely empty or when a sufficient quantity of
oil has been added.
I. Stop the auxiliary oil pump (2) and close valve
(22).
J. Open valves (20) and (21).
K. Turn the auxiliary oil pump switch to automatic.
L. Close and seal the oil container immediately.
Adding Oil To Compressor for a Parallel Oil
Flow System
Compressors manufactured before
1997 will have two circular sight
glasses. The normal oil level should
be maintained at a level within the
lower half of the upper sight glass. The
compressor oil pressure safety may not
permit the compressor to operate if the
level falls into the bottom sight glass.
Compressors manufactured after 1997
may use a reflex type sight glass and
the oil sump cover will be marked with
normal start-up and minimum low oil
levels.
Before operating the compressor, the proper quantity
and type of oil should be charged into the system using
the YORK Oil Charging Pump (P/N 070-10645).
1. Check that the unit is shut down.
If oil must be added while the unit
is in operation, extra care must be
exercised to prevent a nuisance
shutdown.
2. Verify that the pump and attaching hose and hard-
ware are clean and free from contaminants.
3. Inspect the oil container for any sign of foreign ma-
terial or contamination.
28
4. Immerse the suction connection of the oil charging
pump in a clean container of oil. Be sure the oil is
the proper YORK designation for the application.
5. Connect the pump discharge connection to the oil
charging valve located at the end of the compres-
sor oil sump. Be sure the connections are rated
for the design pressure of the system. Do not com-
pletely tighten the connection at the charging valve
until all of the air is forced out and oil is forced out
by pumping a few strokes of the pump. This fills
the lines and prevents air from being pumped into
the system. Exercise extreme care if the unit is
operating.
6. Open the oil charging valve and carefully pump oil
into the system until the oil level is at the normal
mark or one-half of the upper sight glass.
7. Close the oil charging valve.
8. Disconnect the oil pump and secure the oil pump
and storage container to prevent contamination.
9. As soon as the oil charging is complete, and the unit
is not operating, the power supply to the oil heaters
should be energized (normal standby temperature is
150°F). This will keep the concentration of refriger-
ant in the oil reservoir to a minimum.
When the compressor is initially charged with oil, the
auxiliary oil pump should be operated to fill the lines,
passages, oil cooler(s) and filter(s). This may lower the
oil level in the oil sump. It may be necessary to add oil
to restore the level for proper operation.
Record / log all oil added/removed
from compressor.
THE RESERVOIR OIL HEATER
During periods of shutdown, the oil in the reservoir tends
to absorb as much gas as it can hold, depending upon
the temperature of the oil and the pressure in the reser-
voir.
As the temperature of the oil is lowered, the amount of
gas absorbed will be increased. If the quantity of gas in
the oil becomes excessive, violent oil foaming will re-
sult as the pressure within the system is lowered on
starting. The foaming is gas formed by evaporation at
the lower pressure. This condition may cause the oil
pressure from the pump to fluctuate with possible tem-
porary loss of lubrication.
FORM 220.11-NM2 (602)
YORK INTERNATIONAL
Advertisement
