Johnson Controls YORK YMC2 User Manual

Contents
Contents
General safety guidelines.............................................................................................................................. 7
Safety symbols..................................................................................................................................... 7
Changeability of this document......................................................................................................... 8
Associated literature........................................................................................................................... 8
Conditioned based maintenance...................................................................................................... 9
Nomenclature...................................................................................................................................... 9
System fundamentals.................................................................................................................................. 11
System components.......................................................................................................................... 11
Compressor.............................................................................................................................................. 11
Motor......................................................................................................................................................... 11
Heat exchangers...................................................................................................................................... 11
Evaporator................................................................................................................................................ 12
Condenser................................................................................................................................................. 12
Water boxes.............................................................................................................................................. 12
Refrigerant flow control.......................................................................................................................... 12
Variable speed drive................................................................................................................................ 12
Power panel.............................................................................................................................................. 12
Optional service isolation valves............................................................................................................ 12
Optional hot gas bypass......................................................................................................................... 13
OptiView™ control center........................................................................................................................ 13
System operation description.......................................................................................................... 15
Capacity control........................................................................................................................................ 16
Anti-surge minimum frequency............................................................................................................. 17
Smart freeze............................................................................................................................................. 17
Surge protection...................................................................................................................................... 17
Head pressure control............................................................................................................................. 17
System operating procedures.................................................................................................................... 19
Pre-starting......................................................................................................................................... 19
Condenser water temperature control........................................................................................... 19
Start-up............................................................................................................................................... 19
Chiller operation................................................................................................................................ 20
Chilled liquid control settings.......................................................................................................... 21
Operator setpoints quick reference................................................................................................ 22
Stopping the system......................................................................................................................... 23
Safety stop.......................................................................................................................................... 23
Operating logs................................................................................................................................... 23
Fault shutdowns................................................................................................................................ 24
Prolonged shutdown......................................................................................................................... 24
Restart after prolonged shutdown.................................................................................................. 25
OptiView control center functions and navigation.................................................................................. 28
Interface conventions....................................................................................................................... 28
YMC
2
Mod B with OptiView
™
Control Center
3

Johnson Controls YORK YMC2 Specifications

General

Brand	Johnson Controls
Model	YORK YMC2
Category	Chiller
Language	English