York YMC2 A - Page 6

JOHNSON CONTROLS
6
Form 160.78-O1
Issue date: 05/19/2021
Tube fouling ...........................................................................................................................................21
Tube cleaning procedures ..................................................................................................................... 22
Acid cleaning of tubes ...........................................................................................................................22
Testing for evaporator and condenser tube leaks .................................................................................22
Compressor .................................................................................................................................................... 23
Electrical controls ...........................................................................................................................................23
Maintenance inspections for YORK YMC
2
chillers ..........................................................................................24
Daily ......................................................................................................................................................24
Weekly ...................................................................................................................................................24
Monthly (or more often as required) ......................................................................................................24
Annually (more often if necessary) ........................................................................................................24
SECTION 4 - TROUBLESHOOTING ...................................................................................................................25
List of figures
List of tables
FIGURE 1 - YMC
2
chiller components ...................................................................................................................... 7
FIGURE 2 - Compressor prerotation vanes ..............................................................................................................9
FIGURE 3 - Refrigerant ow-through chiller ........................................................................................................... 11
FIGURE 4 - Liquid chiller log sheets .......................................................................................................................14
FIGURE 5 - Evacuation of chiller ............................................................................................................................17
FIGURE 6 - Saturation curve ..................................................................................................................................19
TABLE 1 - System pressures .................................................................................................................................18
TABLE 2 - Refrigerant charge ................................................................................................................................20
TABLE 3 - Operation analysis chart .......................................................................................................................25
TABLE 4 - SI metric conversion .............................................................................................................................27
Table of contents (cont'd)