York YCAS Series, Installation Operation & Maintenance

Page: 120 / 216

120 YORK INTERNATIONAL
FORM 201.19-NM8 (804)
Technical Data
Low pressure liquid refrigerant enters the evaporator and
is evaporated and superheated by the heat energy ab sorbed
from the chilled water passing through the evaporator
shell. Low pressure vapor enters the compressor where
pres sure and superheat are increased. High pres sure vapor
is passed through the oil separator where com pres sor oil
is removed and recirculated to the com pres sor via the
condenser. The high pressure oil-free vapor is fed to the
air cooled condenser coil where the heat is re moved. On
economized models, the fully con densed liquid enters
the econ o miz er.
FIG. 63 –
REFRIGERANT FLOW DIAGRAM
A small percentage of the of the liquid passes through an
expansion valve, into the other side of the econ o miz er
where it is evaporated. This low pressure liquid subcools
the major part of the refrigerant. Me di um pres sure vapor
then returns to the compressor. The subcooled refrigerant
then passes through the ex pan sion valve where pressure
is reduced and fur ther cool ing takes place before return-
ing to the evaporator.
REFRIGERANT FLOW DIAGRAM
Low Pressure Liquid
Medium Pressure Vapour
Low Pressure Vapour
High Pressure Liquid
High Pressure Vapour
Oil
COMP - Compressor CDR -Condenser Coil CLR - Cooler EC - Economizer (Added to some models)
OC - Oil Cooler OS - Oil Separator
- Air Entering Compressor Refrigerant Circuit Number
Thermostatic Expansion Valve
TXV Valve
Relief Valves
Filter or Drier
Sight Glass
Angle Stop Valve
Solenoid Valve
CLR
RC2
COMP.
OS
CDR
OC
m /s 3
Electronic
LD09428A