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COMP - Compressor
OC - Oil Cooler
m /s
3
- Air Entering Compressor R-22 - Refrigerant Circuit Number
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. 36 – REFRIGERANT FLOW DIAGRAM
JOHNSON CONTROLS
REFRIGERANT FLOW DIAGRAM
OC
CDR
RC2
Low Pressure Liquid
Medium Pressure Vapour
CDR -Condenser Coil
OS - Oil Separator
Thermostatic Expansion Valve
Solenoid Valve
Balance Valve
Relief Valves
COMP.
CLR
Low Pressure Vapour
High Pressure Liquid
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 economizer
where it is evaporated. This low pressure liquid subcools
the major part of the refrigerant. Medium pressure vapor
then returns to the compressor. The subcooled refrigerant
then passes through the expansion valve where pressure
is reduced and further cooling takes place before return-
ing to the cooler.
FORM 201.18-NM7
OS
High Pressure Vapour
Oil
LD06971a
109
7
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