Figure 5: Process And Instrumentation Diagram - York YLAA0041 Installation Operation & Maintenance

Form 150.72-ICOM6
Issue date: 12/19/2023
Control Functions:
DV - Display Value
CHT - Chilled Liquid Temperature
HPC - High Pressure Cutout
LPC - Low Pressure Cutout
HPL - High Pressure Load Limiting
LTC - Low Temperature Cutout
ZCPR-3 ZCPR-2
Compressors

Figure 5: Process and instrumentation diagram

Low pressure liquid refrigerant enters the cooler and
is evaporated and superheated by the heat energy ab-
sorbed from the chilled liquid passing through the
cooler shell. Low pressure vapor enters at the compres-
sor where pressure and superheat are increased. The
Johnson Controls
Fans
Condenser
DV
585 PSIG
HPL
HPC
PS
ZCPR-1
DV
P
Ambient Air Sensor
LPC
DV
HTC
LTC
S
-YLLSV
Section 1: General chiller information and safety
Fans
P
650 PSIG
See P.R.V.
Options
450 PSIG
T
high pressure vapor is fed to the air cooled condenser
coil and fans where the heat is removed. The fully con-
densed and subcooled liquid passes through the expan-
sion valve where pressure is reduced and further cool-
ing takes place before entering to the cooler.
Components:
Pressure Relief Valve
Service (Ball) Valve
Expansion Valve
S
Solenoid Valve
Sight Glass
Sensor Pressure
or Temperature
Service (Stop) Access Valve
Pressure Switch
PS
Filter Drier
(Removable Core)
Chilled
Liquid
Evaporator
T
Chilled
Liquid
DV
CHT
LTC
2
LD13139
31