Operating Inspections; Figure 6 - Liquid Chiller Log Sheets - York YK Series Operation And Maintenance

SECTION 2 - SYSTEM OPERATING PROCEDURES

OPERATING INSPECTIONS

By following a regular inspection using the display
readings of the Microcomputer Control Center, and
maintenance procedure, the operator will avoid serious
operating difficulty. The following list of inspections
and procedures should be used as a guide.
Daily
1. Check OptiView™ Control Center displays.
2. If the compressor is in operation, check the bear-
ing oil pressure on the SYSTEM Screen. Also
check the oil level in the oil reservoir. Operating
oil level should be operating range of oil indicator.
Drain or add oil if necessary.
3. Check entering and leaving condenser water pres-
sure and temperatures for comparison with job
design conditions. Condenser water temperatures
can be checked on the SYSTEM Screen.
4. Check the entering and leaving chilled liquid tem-
peratures and evaporator pressure for compari-
son with job design conditions on the SYSTEM
Screen.
5. Check the condenser saturation temperature
(based upon condenser pressure sensed by the
condenser transducer) on the SYSTEM Screen.
6. Check the compressor discharge temperature on
the SYSTEM Screen. During normal operation
discharge temperature should not exceed 220°F
(104°C).
*NOTE: These items can be printed by an electronic printer connected to the Microboard
and pressing the PRINT key on the Keypad, or automatically using the Data Logger feature.

FIGURE 6 - LIQUID CHILLER LOG SHEETS

12
7. Check the compressor motor current on the
SYSTEM Screen.
8. Check for any signs of dirty or fouled condenser
tubes. (The temperature difference between wa-
ter leaving condenser and saturated condensing
temperature should not exceed the difference re-
corded for a new unit by more than 4°F (2.2°C)).
Weekly
1. Check the refrigerant charge. (Refer to Checking
The Refrigerant Charge During Unit Shutdown
on Page 28.)
Monthly
1. Leak check the entire chiller.
Quarterly
1. Perform chemical analysis of oil.
Semi-Annually (or more often as required)
1. Change and inspect compressor oil filter element.
2. Oil return system.
a. Change dehydrator.
b. Check nozzle of eductor for foreign particles.
3. Check controls and safety cutouts.
LD00467
FORM 160.76-O1
ISSUE DATE: 6/15/2015
23889A
JOHNSON CONTROLS