Johnson Controls YORK YK Style G OPTIVIEW Operation And Maintenance page 6

Megging The Motor ......................................................................................................................................... 30
Compressor .................................................................................................................................................... 33
Electrical Controls .......................................................................................................................................... 34
SECTION 7 - PREVENTIVE MAINTENANCE ........................................................................................................35
Compressor .................................................................................................................................................... 35
Compressor Motor .......................................................................................................................................... 35
Greased Bearings ......................................................................................................................................... 35
Leak Testing ................................................................................................................................................... 36
Evaporator And Condenser ............................................................................................................................ 36
Oil Return System .......................................................................................................................................... 36
Electrical Controls .......................................................................................................................................... 36
FIGURE 1 - Model YK Chiller ....................................................................................................................................7
FIGURE 2 - Compressor Prerotation Vanes ..............................................................................................................8
FIGURE 3 - Refrigerant Flow-Thru Chiller (Falling Film Evaporator) ........................................................................ 9
FIGURE 4 - Refrigerant Flow-Thru Chiller (Flooded Evaporator)............................................................................10
FIGURE 5 - Oil Level Indicator ............................................................................................................................... 11
FIGURE 6 - Chiller Starting Sequence And Shutdown Sequence (Em Starter And Solid State Starter) ................ 12
FIGURE 7 - Chiller Starting Sequence And Shutdown Sequence (Variable Speed Drive) ..................................... 12
FIGURE 8 - Liquid Chiller Log Sheets .....................................................................................................................14
FIGURE 9 - System Components Front View .........................................................................................................18
FIGURE 10 - System Components Rear View ........................................................................................................19
FIGURE 11 - Schematic Drawing - (YK) Compressor Lubrication System............................................................. 20
FIGURE 12 - Oil Return System..............................................................................................................................23
FIGURE 13 - Charging Oil Reservoir With Oil .........................................................................................................24
FIGURE 14 - Evacuation Of Chiller .........................................................................................................................27
FIGURE 15 - Saturation Curve ................................................................................................................................29
FIGURE 16 - Diagram, Megging Motor Windings ...................................................................................................30
FIGURE 17 - Motor Starter Temperature And Insulation Resistances .................................................................... 31
TABLE 1 - Operation Analysis Chart .......................................................................................................................25
TABLE 2 - System Pressures .................................................................................................................................28
TABLE 3 - Bearing Lubrication ................................................................................................................................35
6
TABLE OF CONTENTS (CONT'D)
LIST OF FIGURES
LIST OF TABLES
FORM 160.75-O1 (211)
JOHNSON CONTROLS