Refrigeration cum Heat Pump Trainer MODEL RAC 007

Sci-tech Refrigeration cum Heat Pump Trainer Model RAC 007 is designed to provide students with a thorough understanding of various types of systems used in commercial and industrial applications. It permits students to understand the refrigeration cycle, including measurement of pressure, vacuum, flow rate and temperature.

The unit contains a reversing valve so that the system may be run as a heat pump in addition to operation as a refrigeration system.

Sight glasses at inlet and outlet of evaporator and condenser allows students to monitor changes in refrigerant state. The system components are panel mounted to provide easy access for testing and troubleshooting.

Item Description

List of Experiments
Basic skill training
● Basic function of refrigeration control components, such operating principles and common fault & trouble shooting method
● Learn the sizing of condenser, evaporator and compressor units
● Troubleshooting of refrigeration cycle failure symptom and caused
● Basic electric control circuit and system of common air conditioning system
● System Setup : initial leak detection, leak detection, evacuating a refrigerant
● Study on receiver : liquid receiver and suction line accumulator
● Familiarization with various types of compressor
● Investigation on the operation of the compressor
● Familiarization with the operating of metering devices, for instance, thermostatic expansion valve, automatic expansion valve, capillary tube
● Study on system control devices such as pressure controllers, thermostatic controls, solenoid valve controls and backpressure regulator
● Study on the principles of evaporator and condenser – superheating and sub cooling, heat exchanger
● Investigation of refrigeration system

Technical Specifications

● Compressor
– Hermetic : 450 Watt
– Refrigerant : R-134A
– Voltage : 240
● Condenser
– forced air coil with variable speed fan
● Control devices
– Low pressure switch

– High pressure switch
– Back pressure regulator
– Capillary tube
– Automatic expansion valve
– Thermostatic expansion valve
– Solenoid valves
– Thermostatic controller
– Flow Meter
– Wattmeter, Voltmeter, Ammeter
– Thermometer
● Safety features
– Safety pressure switch
– Main breaker switch
– Compressor breaker switch
● Evaporator
– Air Cooled Type
– Water Source Type

Scope of Delivery Operating instructions, Student experiment book, Teacher’s answer book.