Specifications

8
REFRIGERATION COMPONENTS
Access Valve - Access port on the evaporator that allows
service personnel to check system
pressure.
Accumulator - A device installed on the suction line that is
used to boil off small amounts of liquid refrigerant so liquid
does not reach the compressor.
Compressor - An electrically driven piston pump that
pumps vapor refrigerant from a low pressure level to a
higher pressure level.
Condenser - The component in a refrigeration system that
transfers the heat that was absorbed by the refrigerant in
the evaporator and the heat of compression from the sys-
tem by condensing the refrigerant.
Condenser Fans - Fan that forces air through the air
cooled condenser to aid heat transfer.
Dual-Pressure Control - A device that protects the com-
pressor from low charge and high pressure.
Evaporator - The component of the refrigeration system
that absorbs heat from the air by boiling liquid refrigerant to
vapor.
Evaporator Fans - Fans that circulate air through the case
and force air through the evaporator to aid heat transfer.
Filter Drier - A device installed on the liquid line of a refrig-
eration system that removes water and other impurities
from the refrigerant in the lines during initial start-up.
Receiver - The component in a refrigeration system that
stores liquid refrigerant that is not being used by the system
in low load conditions or when the system is shut down.
Service Valve - A manually operated valve in the refrigera-
tion system that is used for various service operations such
as isolating the high or low sides of the system.
Sight Glass - A device installed on the liquid line of a refrig-
eration system that is used to determine if there is water or
vapor in the lines by visual inspection.
Thermostatic Expansion Valve (TXV) - A valve that con-
trols the flow of liquid refrigerant to the evaporator coil and
also separates the high pressure side of the system from
low pressure side of the system.
Thermostatic Expansion Valve (TXV) Bulb - A bulb that is
attached to the suction line of the evaporator that controls
the TXV. Inside the bulb is a charge that reacts to tempera-
ture and regulates the flow of refrigerant through the expan-
sion valve.