SR2016 Electrical Faults in Full Air Conditioning Systems Vocational Training Equipment Refrigeration Laboratory Equipment

Learning Objectives / Experiments

– electrical design and operation of full conditioning

systems

– reading and understanding electrical circuit

diagrams

– design and operation of electrical components in

an air conditioning system

* start-up capacitor

* start-up relay

* operating capacitor

* overheat protection

* Heinemann circuit breaker

* solenoid valve

* defrost timer

* float switch

* thermostat

* hygrostat

* frost protection monitor

– fault finding in electrical components

* in idle state

* under mains voltage

Specification

[1] experimental unit from the practical series for the training of mechatronics engineers for refrigeration

[2] simulation of the electrical circuit of a complex conditioning system with humidifier and heat pump function for heating, cooling and humidifying

[3] real control circuits with electrical components, simulated load circuits

[4] electrical simulation of compressor, 2 fans (room air, outer air), 4-way reversing valve, auxiliary heating

[5] humidifier with hygrostat, solenoid valve and float switch (pump simulated)

[6] hot gas defrosting by switching the 4-way reversing valve

[7] operating states of the simulated components indicated via lamps in the circuit diagram

[8] circuit diagram depicted on the front panel

[9] identification of 30 faults: multimeter measures voltages or resistances at the lab jacks

Technical Data

Thermostat to switch between heating/cooling

– measuring range: 1…60°C

Electrical compressor components

– start-up relay

– start-up capacitor

– operating capacitor

– overheat protection

– 2 pressure switches

Electrical components of room air fan

– start-up capacitor

– Heinemann circuit breaker

Humidifier components

– hygrostat: measuring range 30…100% r.h.

– float switch

– solenoid valve

– Heinemann circuit breaker

Defrosting components

– frost protection monitor: -10…12°C

– timer: switching time 10…60min

Circuit breaker for auxiliary heating

Dimensions and Weight

LxWxH: 1050x400x860mm

Weight: approx. 48kg

Required for Operation

230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase