Hill Phoenix Origin2 OSAA, Installation & Operation Handbook

11

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 refrig-

erant 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 system by condensing the refrigerant.

Condenser Fan - 

Fan that forces air through the air cooled condenser to aid heat transfer.

Dual Pressure Control

- A device that protects the compressor 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 refrigeration system that removes water and other

impurities from the refrigerant in the lines during initial start-up.

High Pressure Warning Light

- Indicator light that warns the operator that the system pressure is to high.

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 refrigeration system that is used for various service oper-

ations such as isolating the high or low sides of the system.

Suction Line Solenoid

- A device that prevents liquid from entering the compressor.

Thermostatic Expansion Valve (TXV) - 

A valve that controls the flow of liquid refrigerant to the evapo-

rator 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 evapora-

tor that controls the TXV.  Inside the bulb is a charge that reacts to temperature and  regulates the flow of
refrigerant through the expansion valve. 

COMPONENT DEFINITIONS