Study Of Components And Breakdowns Of Refrigerating Installations

Study Of Components And Breakdowns Of Refrigerating Installations

• A large printed synoptic panel reproducing the circuits as a whole.
• A refrigerating circuit equipped with a compressor.
• A system to introduce breakdowns, equipped with lights, switches and controls.
• Variable current and voltage circuits.
• A data collection system equipped with corresponding instruments

Teaching objectives

• This unit enables the study and analysis of the following topics.
• Faults on the compressor valve.
• Faults on the oil separator.
• Faults due to excessive coolant.
• Faults due to lack of coolant.
• Total blockage of coolant going to the evaporator.
• Broken regulator.
• Obstructed dehydrator.
• Condensation pressure too high.
• Suction pressure too high.
• Suction pressure too low.
• Electric motor phase cut off.
• Both motor phases cut off.
• Defective refrigerating thermostat.
• Defective freezing thermostat.
• Defective trip coil.
• Defective thermal protection of compressor.
• Defective run capacitor.
• Techniques for mounting/dismounting and connecting the different components.
• Quality control of components.

Technical specifications

• A compressor
• Condenser, fluid indicator, filters, evaporator with thermal load, thermostatic valve, oil separator
• Set of electrical instruments, all class 1.5, comprising: 1 voltmeter, 1 ammeter, 1 wattmeter, 1 COS(Φ) meter, 1 ohmmeter, 1 capacitance meter.
• Flowmeter for coolants.
• Electronic thermometers with PTC sensors.
• Pressure gauges.
• Voltage variator.
• Current variator.
• Fixed voltage cables.
• Complete set of components for running a training programme, comprising thermostats, pressure switches, time delay relays, thermal and capacity protection systems.
• switches for introducing breakdowns in the installation. Breakdowns in the hydraulic part are introduced by activating control valves, while electrical breakdowns are introduced by activating relays.
• Manual of theory and experiments

Services required

• Electricity supply: 230 V - 50 Hz single phase

Dimensions and weight

• 1800 x 800 x 1800 mm – 167 kg