Johnson Controls York YKEP, Operation And Maintenance

FORM 160.77-O1  

ISSUE DATE: 10/22/2020

JOHNSON CONTROLS

20

SECTION 3 - MAINTENANCE

Oil Charge

The YKEP oil system uses YORK “K” type oil. The 

nominal oil charge for the YKEP compressors is 40 

gallons.
Always use new YORK refrigeration oil in the centrif-

ugal compressor. Oil absorbs moisture when exposed 

to the atmosphere, therefore, it should be kept tightly 

capped until used.

Oil Charging Procedure

During operation the compressor oil level must be 

maintained in the “Operating Range” identified on the 

vertical oil level indicator (refer to 

Figure 6 on Page 

15

). If the oil level falls into the lower oil range, 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). 
Using the following procedures:

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 charg-

ing valve located on the remote oil reservoir cover 

plate (see 

Figure 8 on Page 19

). 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 reser-

voir is in the “Over Full” region of the oil level 

indicator label. Close the charging valve and dis-

connect the hand oil pump.

4.  As soon as oil charging is complete, close the 

power supply to the starter to energize the oil 

heater. This will keep the concentration of refrig-

erant 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 may then be necessary to add 

oil to bring the level back into the “Operating Range” 

of the oil level indicator label.

FIGURE 9 - 

CHARGING OIL RESERVOIR WITH OIL

LD08579

LD08648

OIL CHARGING VALVE

OIL RESERVOIR

GAGE LIQUID 

LEVEL SIGHT