● Fully Operational small scale coldroom
● Multiple circuit, incorporating secondary controls
● Push button selection of built in faults
● Push button selection of Refrigeration circuit
● Optional Student Tool Kit, Test and Service Equipment and Maintenance and Student Practice Package
● Two year Warranty.
Introduction
The Advanced Training Unit 805 is a fully operational, small scale coldroom, which enables the student to relate all test results, system faults and adjustments directly to situations encountered in service and maintenance.
It is a multiple circuit unit, incorporating important secondary controls, is constructed entirely from standard commercial components and will give the student invaluable experience in fault diagnosis, system adjustment and replacement of faulty components.
Components include:
Electric Defrost System
Evaporator Pressure Regulation
Crankcase Protection
Capacity Regulation
Variable Coldroom Heat Load
The push-button Switches Enable:
Selection of simple or more complex refrigeration circuit.
2. Comparison of controls.
3. A clear demonstration of the correct use of internal and externally equalised thermostatic expansion valves.
4. Selection of built in faults.
Description
Model 805 is one of a range of trainers designed to provide practical training in the fields of Refrigeration and Air Conditioning.
Each trainer has been carefully designed to provide instruction in specific topic areas that trainees are required to study as part of most Refrigeration and Air Conditioning courses.
The unit is mounted on a steel frame with stainless steel panels and comprises a semi hermetic type compressor with air cooled condenser and forced air evaporator with electric defrost inside an insulated cabinet with hinged lid.
A variety of different controls can be selected and the operation with each type of control studied.
All the controls and the high and low pressure switches are adjustable by the student to enable advanced studies in the control of vapour compression refrigeration equipment.
A standard Student Tool Kit, Test and Service Equipment Package and Maintenance and Student Practice Package are available as optional items.
Further details available on request.
Specification
DETAILED
The unit is mounted on a steel framework, with stainless steel base and back panels and incorporates:-
Semi-hermetic condensing unit, with fan cooled condenser and receiver. Forced-air evaporator, with electric defrost, mounted in insulated box with hinged lid. Heat load – variable 75 to 600 watts.
Pressure gauge.
2 Compound gauges.
High-pressure control and low pressure control
Thermostat.
Oil separator.
Heat exchanger
2 Liquid line driers
3 Thermostatic expansion valves.
Evaporator pressure regulator.
Crankcase pressure regulator.
Capacity Regulator.
7 Solenoid valves.
3 Handwheel valves.
Refrigerant R134a.
6 Sight glasses
Electrical
ON/OFF switch with indicator light.
7 Push button switches to control refrigerant flow path and to select in-built faults.
Separate push-button to switch:
Condenser Fan Motor
Evaporator fan motor
Coldroom heat load
Overload protector
Contactor
Earth leakage protector
De-frost timer
Operating Manual
A comprehensive operating manual includes:
Notes on theory and principles
Instructor’s guide notes
Student test papers and sample answers
Electrical wiring diagram.
