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TABLE 8 – MAINTENANCE REQUIREMENTS FOR YORK MULTISTAGE CENTRIFUGAL COMPRESSORS
PROCEDURE
Check oil level – record any additions / removal
Check refrigerant charge
Check and repair leaks ^
Check vibration levels
Check alignment / couplings
Perform analysis on compressor lube oil ^
Replace oil and filters
Record / evaluate system pressures / temperatures
Test / calibrate all safety controls^ and gauges
Sample / analysis refrigerant chemistry
Replace system filters / driers and clean strainers
Replace A4 gas filter
Replace oil return filter
Check / drain seal oil trap
Check / clean oil cooler
Check relief devices
*
Reserved for any special site determined requirements.
^ This procedure must be performed at the specified time interval by an Industry Certified Technician who has been trained and qualified to work
on this type of YORK equipment. A record of the procedure being carried out must be maintained on file by the equipment owner should proof of
adequate maintenance be required at a later date for warranty validation purposes. This procedure must be performed more frequently if
refrigerant losses exceed 10% of system charge.
HOW TO IDENTIFY PARTS
Figure 4B is a cutaway sectional view of a two stage
Centrifugal Compressor. The parts are identified by
number and are described in the accompanying parts
list. Table 4 is provided for reference only. To order
parts for your YORK compressor refer to the part num-
bers in the installation drawings for your specific unit.
Always refer to the compressor serial number when
inquiring about parts for a multi-stage compressor.
ROUTINE MAINTENANCE INSPECTIONS
Refer to Table 8 for the minimum recommended main-
tenance actions and intervals for YORK Multistage Cen-
trifugal Compressors. Many potential compressor diffi-
culties may be avoided by following a regular Inspec-
tion and Maintenance program.
PREVENTATIVE MAINTENANCE CHECK
Before disassembling the compressor, check with the
unit operator. Review the cause of the current shutdown
and the history of previous shutdowns. Inspect the log
sheets and other records to determine if proper preven-
tative maintenance has been performed in accordance
with Table 8. Historical information in the log sheets
may indicate possible causes of unit shutdown such as;
YORK INTERNATIONAL
DAILY
WEEKLY
MONTHLY QUARTERLY SEMI-ANNUALLY YEARLY
24 HRS.
160 HRS.
1000 HRS.
X
X
X
X
X
X
X
losing oil at light load, faulty or worn suction end shaft
seal, etc.
Also check the following:
A. Oil Filter Element – Check for any particles of
B. Control – Check that the control that caused
C. Maintenance – The frequency of oil and oil
D. Air – Check air pressure to control circuit and
E. Calibration – Check the frequency of con-
Compare the compressor shaft alignment to the origi-
nal, or subsequent, alignment records. Improper align-
ment could increase vibration (driver, gear, and com-
pressor), wear and/or damage to compressor, driver and
gear parts (i.e. seal). See Form 160.71-N2 for proper
alignment procedures. If alignment tolerances do not
coincide with the alignment records, determine the rea-
son and correct to the required by hot check.
3000 HRS.
3000 HRS.
6000 HRS.
X
X
X
metal. Any evidence of aluminum particles may
be an indication of bearing wear.
the shutdown is operable and at the specified
setpoint.
filter element changes, cleaning water side of
oil cooler, cleaning air filters in control circuit.
PRV actuator.
trol calibration.
FORM 220.11-NM2 (602)
EVERY * HOURS
X
X
4
X
X
X
X
33
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