Section 1 - Description Of System And Fundamentals Of Operation; System Operation Description; Figure 1 - Model Yk Chiller - York YK Style H Operation Manual

FORM 160.76-O2
issue date: 6/15/2015
SECTION 1 - DESCRIPTION OF SYSTEM AND FUNDAMENTALS

SYSTEM OPERATION DESCRIPTION

The YORK Model YK Chiller is commonly applied
to large air conditioning systems, but may be used
on other applications. The chiller consists of an open
motor mounted to a compressor (with integral speed
increasing gears), condenser, evaporator and variable
flow control.
The chiller is controlled by a modern state of the art
Microcomputer Control Center that monitors its opera-
tion. The Control Center is programmed by the opera-
tor to suit job specifications. Automatic timed start-ups
and shutdowns are also programmable to suit night-
time, weekends, and holidays. The operating status,
temperatures, pressures, and other information perti-
CONDENSER

FIGURE 1 - MODEL YK CHILLER

JOHNSON CONTROLS
OF OPERATION
nent to operation of the chiller are automatically dis-
played and read on a graphic display. Other displays
can be observed by pressing the keys as labeled on the
Control Center. The chiller with the OptiView Control
Center is applied with an Electro-Mechanical Starter,
YORK Solid State Starter (optional), or Variable Speed
Drive (optional).
When the compressor motor is driven by a YORK
Solid State Starter, one of two different starters could
be applied. Later production chillers are equipped with
either the Style B Liquid Cooled Solid State Starter
(LCSSS) or the Medium Voltage Solid State Starter
(MVSSS).
COMPRESSOR
CONTROL
CENTER
Motor
EVAPORATOR
1
VSD
LD15222
9