Purpose: Educational refrigeration trainer with parallel expansion valve configurations, fault diagnosis,
and data acquisition
Compressor: Not less than 1/2 HP,220 V/ 1 phase / 50 Hz, reciprocating.Refrigerant R-134a.R-22 and
anyotherHCFC.
Condenser: Air-cooled.Thefan motor rating declared.
Evaporator: Air-cooled, with an insulated observation chamber of intemal volume not less than 0.06 m3,
fitted with front and rear dampers.
ExpansionValves: Not less than TWO interchangeable expansiondevices,ofwhichone a
capillary tube. A third device (thermostatic or automatic) is desirable.
Solenoid Valves: Solenoid valve or valves appropriate to the circuit configuration offered, rated for the
refrigerant and the operatingpressure.The quantity,size and connection typedeclared.
Sight Glass: Welded or nut-fastened type
Fault Simulation: Not less than 6 fault scenarios,implemented by switch, valve or software, with fault
indication. Thescenarioslisted.
Control Panel: NFB 15A; magnetic switch DC24V/9A; thermal relay 9-12A; digital watt meter; timers;
push buttons; indicator lamps (R/G/Y/W)
Data Board:Measurement points shall cover,asa,compressor suction and discharge,
condenser inlet and outlet, expansion device inlet and outlet, evaporator outlet and ambient. The number,
Data Board:Measurementpointsshall cover, as a,compressor suction and discharge,
typeand location ofsensors declared. Interface:wirednetwork or USB interfaceto ahostPC.A
removable microcontroller module is desirable and non-mandatory.
Software: Mollier diagram; P-I diagram auto-draw, data save; network control; Windows 10/11
compatible
Tablet App: Remote monitoring via tablet app (Android/iOS)
.
