Johnson Controls YORK YK MaxE User Manual

FORM 160.54-O1
7
JOHNSON CONTROLS
When the compressor motor is driven by a YORK Solid
State Starter, one of three different Starters could be ap-
plied. Later production chillers are equipped with either
the Style B Liquid Cooled Solid State Starter (LCSSS)
or the Medium Voltage Solid State Starter (MVSSS).
Earlier vintage chillers are equipped with the Mod “A”
Solid State Starter. This starter contains a Trigger Board
that interfaces to a Logic Board that is installed inside of
the Control Center.
When the compressor motor is driven by a YORK Vari-
able Speed Drive, there could be a Variable Speed Drive
(VSD) or a Medium Voltage Variable Speed Drive (MV
VSD) applied.
In operation, a liquid (water or brine to be chilled) ows
through the cooler, where boiling refrigerant absorbs heat
from the liquid. The chilled liquid is then piped to fan
coil units or other air conditioning terminal units, where
it ows through nned coils, absorbing heat from the
air. The warmed liquid is then returned to the chiller to
complete the chilled liquid circuit.
SECTION 1
DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION
00611vip
CONDENSER
CONTROL
CENTER
COMPRESSOR
MOTOR
EVAPORATOR
FIG. 1 – MODEL YK MaxE™ CHILLER
SYSTEM OPERATION DESCRIPTION (SEE FIG. 2)
The YORK Model YK MaxE™ Chiller is commonly ap-
plied 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 ow control.
The chiller is controlled by a modern state of the art Mi-
crocomputer Control Center that monitors its operation.
The Control Center is programmed by the operator to suit
job specications. Automatic timed start-ups and shut-
downs are also programmable to suit nighttime, week-
ends, and holidays. The operating status, temperatures,
pressures, and other information pertinent to operation
of the chiller are automatically displayed 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).

Johnson Controls YORK YK MaxE Specifications

General

Brand	Johnson Controls
Model	YORK YK MaxE
Category	Chiller
Language	English