Johnson Controls York YCIV A Series - Page 9

JOHNSON CONTROLS
9
FORM 201.23-NM2
ISSUE DATE: 3/9/2015
Component Locations ..................................................................................................................................175
Glycol System Components .........................................................................................................................196
Compressor Components ............................................................................................................................198
Chiller Electronic Components .....................................................................................................................199
Keypad ................................................................................................................................................199
Keypad Data Entry Mode ....................................................................................................................200
Display .................................................................................................................................................200
Relay Output Boards ...........................................................................................................................201
VSD (Variable Speed Drive) ............................................................................................................... 202
AC to DC Rectier ...............................................................................................................................202
SCR Trigger Board ..............................................................................................................................202
DC Link Filter .......................................................................................................................................202
1L Line Inductor ..................................................................................................................................203
DC to AC Inverter ................................................................................................................................203
Laminated Bus Structure ..................................................................................................................... 204
VSD Logic Board ................................................................................................................................. 204
Control Panel to VSD Communications ..............................................................................................205
IGBT Gate Driver Boards ....................................................................................................................205
Current Transformers ..........................................................................................................................206
DV/DT Output Suppression Network ...................................................................................................206
Flash Tank Feed and Drain Valve Controller ....................................................................................... 206
DC Bus Voltage Isolation Board ..........................................................................................................207
Chiller Circuit Breaker .........................................................................................................................207
Chiller Configuration Jumpers ......................................................................................................................207
Number of Compressors Conguration Jumper ..................................................................................207
VSD Logic to Chiller Microprocessor Board RS-485 Communication Configuration Jumpers .....................208
Maximum VSD Frequency/Model designator ............................................................................................... 208
SECTION 7 - OPERATION ...................................................................................................................................209
Operating Controls .......................................................................................................................................209
Anti-recycle Timer ................................................................................................................................209
Evaporator Pump Control .................................................................................................................... 209
Evaporator Heater Control ..................................................................................................................209
Pumpdown Control .............................................................................................................................. 209
Compressor Heater Control ................................................................................................................209
Alarms .................................................................................................................................................209
Chiller Run Contact .............................................................................................................................209
Unit Switch ..........................................................................................................................................210
Basic Operating Sequence ...........................................................................................................................210
Start Sequence and Loading ...............................................................................................................210
Number of Compressors to Start .................................................................................................................. 211
General ................................................................................................................................................ 211
Standard IPLV ..................................................................................................................................... 211
Optional Optimized High IPLV ............................................................................................................. 211
Minimum VSD Compressor Start / Run Frequency ......................................................................................212
Minimum VSD Start Frequency ........................................................................................................... 212
Minimum VSD Run Frequency ............................................................................................................ 212
Acceleration / Deceleration Rate when Starting / Stopping Compressors ...................................................213
VSD Acceleration and Deceleration Rates ..........................................................................................213
TABLE OF CONTENTS (CONT'D)