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Teaching suggested applications*

-         Identification of components of a negative refrigerating system

-         Piping and wiring exercises

-         Leak testing of the circuit

-         The refrigerating fluid load (requires tooling and fluid not supplied)

-         Commissioning and setting (expansion valve, pressure switches  ...)

-         Study of the basic concept of a refrigeration system running with R448A.

-         The system with industrial rendering

The kit comes with the main components attached to the support. The wiring and piping are not realized. (See photo above)

Description

The negative refrigeration building kit allows to train students in the realization of a negative refrigerating system. The system includes all the standard components such as compressor, condenser, expansion valve, evaporator, tanks, pressure switches.

The kit comes complete with the main components attached to the support. Students can work on identifying the components, the shaping of refrigerant piping, the wiring of the cabinet, leak testing, the refrigerant load (requires the tooling not supplied with the bench), commissioning , adjusting and verifying the proper operation.

The kit is intended to be assembled with the cold rooms type CHB100 of DIDATEC brand.

The robust design of this equipment makes it perfectly suited for use in schools.

Its structure in anodized aluminum on wheels gives it great strength as well as great flexibility of integration into your premises. The manufacturing of this equipment meets European machine directive

1.A hermetic compressor

Refrigerant: R448A

Condensing temperature + 32°C

Evaporation temperature -25 ° C

Maximum pressure: 32 bars

Power: 706W (-25°C / 32°C)

Equipped with two service valves

2. Air condenser

forced convection

3. receiver

Vertical made of steel

Volume: 1.5L

4. Refrigerant recovery valve

5. Filter drier

Solid cartridge drier Ø1 /4 "

Sight glass Ø1 /4 "

6. Solenoid valve

Normally closed

Straight passage Ø1 /4 "

Thermostatic expansion valve

Internal pressure equalization with calibrated orifice (-40°C /+ 10°C)

8. Evaporator

Forced convection

Evaporation temperature -25°C

Power: 730W for dT = 7K

Electrical defrost

9. A suction line accumulator. 

Vertical made of steel

Volume: 1.5L

10. Control and safety system

High pressure gauge -1 à 30bars

Low pressure gauge -1 à 10bars

High pressure switch control

Low pressure switch control

HLP combined safety pressure switch

The electrical cabinet of the system includes:

-an electrical cabinet made of steel with a 230VAC plug to connect the accessories.

-the standard safety elements (main switch, emergency stop button, GFCI, connection to earth and white light)

-a circuit breaker for each element

-the relays for the main components of the system (evaporator, electro valve, compressor, condenser, defrost heater)

-lights for each component

-a refrigeration temperature controller with 2 probes to manage all the components (defrost, ventilation…)

Characteristics of the frame :

-the frame is made of anodized aluminum  and screwed profiles

-it is set up on 4 wheels diameter 100mm.

• Power supply: 230 Vac – 50 Hz –10A
• Power supply Type: 1 phase(s) + Neutral + Earth.