Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual page 6

SECTION 17 - OIL PUMP VARIABLE SPEED DRIVE .........................................................................................145
Automatic Operation ..................................................................................................................................... 145
Manual Operation ......................................................................................................................................... 146
Oil Heater Operation .................................................................................................................................... 147
SECTION 18 - COMMUNICATIONS .....................................................................................................................149
SECTION 19 - PRESSURE TRANSDUCERS ......................................................................................................151
SECTION 20 - TEMPERATURE THERMISTORS ................................................................................................155
SECTION 21 - REMOTE SETPOINTS ..................................................................................................................177
Remote Operating Modes ........................................................................................................................... 177
Current Limit ................................................................................................................................................. 177
Leaving Chilled Liquid Temperature ............................................................................................................. 179
Leaving Condenser Liquid Temperature (Heat Pump Mode) ....................................................................... 181
SECTION 22 - HOT GAS BYPASS ......................................................................................................................185
Setpoints ...................................................................................................................................................... 185
Operation ...................................................................................................................................................... 186
Hot Gas Operation with Variable Geometry Diffuser (VGD) ......................................................................... 187
Manual Control ............................................................................................................................................. 187
I/O Board ...................................................................................................................................................... 187
Pre-Rotation Vanes Potentiometer .............................................................................................................. 188
SECTION 23 - SMART FREEZE PROTECTION ..................................................................................................191
SECTION 24 - SURGE PROTECTION ................................................................................................................193
Surge Detection ............................................................................................................................................ 193
Excess Surge Detection .............................................................................................................................. 194
Surge Protection ........................................................................................................................................... 194
Hot Gas Bypass/Compressor Motor Variable Speed Drive (VSD) Applications ........................................... 195
SECTION 25 - VARIABLE GEOMETRY DIFFUSER ............................................................................................197
Stall Detection .............................................................................................................................................. 197
Surge Detection ............................................................................................................................................ 197
Automatic Operation ..................................................................................................................................... 197
Stall Sensor Validation.................................................................................................................................. 199
Extreme Stall Monitor ................................................................................................................................... 199
Manual Operation ......................................................................................................................................... 200
Setpoints ...................................................................................................................................................... 200
Pre-Rotation Vanes Position......................................................................................................................... 201
I/O Board ...................................................................................................................................................... 201
Stall Transducer .......................................................................................................................................... 201
Stall Detector Board .................................................................................................................................... 201
SECTION 26 - LARGE TONNAGE CHILLER (LTC) I/O BOARD .......................................................................205
Digital Inputs ................................................................................................................................................. 205
Digital Outputs .............................................................................................................................................. 207
Analog Inputs ............................................................................................................................................... 208
Analog Outputs ............................................................................................................................................. 209
Auto Detection ............................................................................................................................................. 210
Diagnostic Screen ....................................................................................................................................... 210
6
TABLE OF CONTENTS (CONT'D)
FORM 160.54-M1
JOHNSON CONTROLS