● Shows Clearly the Basic Principles of the Vapour Compression Refrigeration Cycle
● Introduces the Concepts of Change of State, Saturated Liquid, Saturated Vapour and Superheated Vapour
● Optional Student Tool Kit, Test and Service Equipment and Maintenance and Student Practice Package.
● Instruction Manual Contains Course Notes, Instruction Notes and Student Example Worksheets
● Demonstrates Common Faults and Effects on the System
● Two year Warranty.
Introduction
Students who are new to refrigeration may find some important concepts difficult to understand, for example,
Latent heat
Pressure/temperature relationship
A liquid can boil at sub-zero temperatures
Saturation temperature
Superheat
Sub-cooling
With its transparent evaporator, the Model 801 is designed to promote a clear understanding of these concepts, and to support the teaching of:
The basic principles of heat transfer
The Vapour compression refrigeration cycle
Function and application of different flow controls
Description
Model 801 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 an open type compressor with air cooled condenser and clear plastic evaporator.
A variety of different flow controls can be selected and the operation with each type of control studied, including liquid return to the compressor.
All the flow controls and the high and low pressure switches are adjustable by the student to enable basic studies in the control of vapour compression refrigeration.
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.
Air-cooled condensing unit with open type twin cylinder reciprocating compressor. Transparent plastic evaporator, clearly showing change of state of refrigerant from liquid to vapour phase
Refrigerant flow control options, selected by use of hand wheel valves as follows:
Automatic Expansion Valve
Thermostatic Expansion Valve, Internally equalised.
Capillary with Separate Filter Drier
Liquid/suction heat exchanger Liquid line filter drier and sight glass HP/LP switches
Compound and pressure gauges Suction and discharge service valves fitted Liquid line hand wheel valve fitted for easy manual pump down of system Refrigerant R134a
An electrical control box is mounted on the back panel and includes indicators/warning lamp, on/off contactor and overload, as well as residual current device for protection against earth leakage.
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.
