Trainer for fault simulation on refrigerant and electric circuit

ECC-F/EV

This trainer was designed for fault simulation on the refrigerating and electric circuits of a positive temperature refrigeration plant charged with fluid R134a.

Training program

Plant commissioning
Investigate the concepts at the base of a refrigerating plant
Perform electrical and/or fluidic measurements on a plant for calculating power and efficiency and for tracing refrigeration cycles
Work on different technologies of expansion device
Parallel operation of evaporators
Monitoring a plant and determining the cause of the simulated faults

Technical specifications

Steel structure painted and treated in oven and mounted on wheels
Refrigerating unit consisting of:
- Commercial semi-hermetic compressor with cooling power of 1.100 W (condensation: +45°C, evaporation: -10°C)
- Dryer filter
- Sight glass
- Liquid receiver
- Valve for fluid recovery
- Liquid separator
- Evaporating pressure regulator
- Shut-off valves
- Condenser fan speed pressostatic variator (HP)
- Compressor control pressure switch (LP)
- Combined safety pressure switch (HP / LP)
- Liquid-vapour heat exchanger at the common output of the two evaporators
- Oil separator
Forced convection air cooled condenser with fan electric power of 75 W at the air flow rate of 0,35 m3 /s with variable speed controlled by pressostatic speed variator
Forced convection air evaporator (500 W cooling power) placed in the open air, fed by solenoid valve (manually controlled) and thermostatic expansion valve
Forced convection air evaporator (500 W cooling power) installed in a sealed and visible room (to allow the trainer to operate with two temperature levels and to control the correct fans operation), with defrosting timer and fed by solenoid valve (controlled by electronic thermostat) and four different expansion devices (manually selectable, without components dismounting or use of tools):
- Capillary tube
- Automatic valve
- Thermostatic valve with internal equalizer
- Thermostatic valve with external equalizer
24VAC control circuit
Electric panel consisting of:
- thermomagnetic
- earth leakage control button
- contactors
- thermal relays
- relays
- state lamps of evaporators, compressor, defrosting heater and of safety pressure switch intervention – run button
Emergency push button
Electric fault simulator operating with keyboard and microprocessor enabling the teacher to introduce anomalies and to assess the troubleshooting attempts carried out by students
The instrumentation mounted on the trainer allows:
to measure the pressure of the refrigerant fluid with pressure gauge:
- -at compressor inlet and outlet
- – at the inlet of the evaporator (placed in the open air) / outlet of the expansion device
- – at the inlet of the evaporator (placed in the hermetic room) / outlet of the expansion devices
- – at the outlet of the evaporator (placed in the open air)
- – at the outlet of the evaporator (placed in the hermetic room)
to measure the refrigerant fluid flow rate at the evaporators inlet
to measure the refrigerant fluid temperature using a thermometer with a probe to be applied along the hydraulic circuit of the installation
The equipment simulates the following faults:
On the cooling circuit:
- fault due to low refrigerant charge
- fault due to too high refrigerant charge
- dryer filter clogged
- malfunction of the expansion devices
- malfunction of the evaporating pressure regulator
- solenoid valves leakage
On the condenser and evaporators circuits:
- crust in the condenser
- crust in one evaporator
On the electrical circuits:
- compressor motor overcurrent
- cut-off of one phase of the compressor motor
- stop of a fan of one of the evaporators
- cut-off of two phases of the compressor motor
- compressor motor overheating
- faulty defrosting heater
On the control circuit:
- Faulty coil of the solenoid valves
- Faulty safety double pressure switch
- Faulty defrost timer
- Faulty control thermostat
- Faulty Pump Down pressure switch
- Faulty pressostatic fan speed variator

Power supply	400 Vac 50 Hz three-phase - 2000 VA
Weight	203 kg
Dimensions	180 x 80 x 180 mm

Supply with

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Tender specifications

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export@elettronicaveneta.com
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Trainer for fault simulation on refrigerant and electric circuit

ECC-F/EV

Download

Download PDF

Tender specifications

Any question?