JOHNSON CONTROLS
7
FORM 160.77-O1
ISSUE DATE: 10/22/2020
SECTION 1 - SYSTEM FUNDAMENTALS
GENERAL
The YORK® YKEP Chiller extends the YORK single-
stage centrifugal chiller product range by providing
additional capacity and greater efficiency through an
economized cycle. This is the only product available
that uses a second single-stage compressor to perform
half lift in parallel. The advantage of this cycle is great-
er control flexibility to move the intermediate pressure
to maximize efficiency or extend cooling capacity.
COMPONENTS
YKEP chillers are equipped with:
• Single-Stage Flash Economizer
• Primary Compressor: K7 (Model YDHA119)
• Economizer Compressor: Q3 (Model HF416)
• YORK Unit-Mounted Low-Voltage Solid State
Starter (LV-SSS) for the economizer compressor
motor.
The primary compressor starter, both compressor mo-
tors, the evaporator, and the condenser are job-specific.
identifies the major YKEP
components, which are described in detail on the fol-
lowing pages.
FIGURE 1 -
YKEP CHILLER MAJOR COMPONENTS (FRONT VIEW)
EVAPORATOR
CONDENSER
PRIMARY (K7)
COMPRESSOR
PRIMARY
OPEN-DRIVE
MOTOR
SECONDARY
OPEN-DRIVE
MOTOR
CONTROL
PANEL
ECONOMIZER (Q3)
COMPRESSOR
ISOLATION
VALVE
ECONOMIZER
SOLID STATE
STARTER
OIL PUMP
PANEL
LD15103
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