Refrigerant Flow Diagram - York MILLENIUM YCAS Series Installation Operation & Maintenance

Technical Data
Low Pressure Liquid
Medium Pressure Vapour
COMP - Compressor
OC - Oil Cooler
3
m /s
- Air Entering Compressor R-22 - Refrigerant Circuit Number
Thermostatic Expansion Valve Solenoid Valve
Solenoid Valve
Balance Valve
Relief Valves
Low pressure liquid refrigerant enters the cooler and is
evaporated and superheated by the heat energy absorbed
from the chilled water passing through the cooler shell.
Low pressure vapor enters the compressor where pres-
sure and superheat are increased. High pressure vapor is
passed through the oil separator where compressor oil is
removed and recirculated to the compressor via the oil
cooler. The high pressure oil-free vapor is fed to the air
cooled condenser coil and fans where the heat is removed.
The fully condensed liquid enters the economizer.
FIG. 27 – REFRIGERANT FLOW DIAGRAM
84

REFRIGERANT FLOW DIAGRAM

OC
CDR
EC
RC2
CH.W
IN
Low Pressure Vapour
High Pressure Liquid
CDR -Condenser Coil
OS - Oil Separator
COMP.
CLR
CH.W
OUT
High Pressure Vapour
Oil
CLR - Cooler EC - Economizer (Added to some models)
Replaceable Core Filter Drier
Sight Glass
Angle Stop Valve
A small percentage of the of the liquid passes through
an expansion valve, into the other side of the econo-
mizer where it is evaporated. This low pressure liquid
subcools the major part of the refrigerant. Medium pres-
sure vapor then returns to the compressor. The
subcooled refrigerant then passes through the expan-
sion valve where pressure is reduced and further cool-
ing takes place before returning to the cooler.
OS
LD05019
YORK INTERNATIONAL