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CRA 542

AIR HANDLING UNIT

Teaching suggested applications*

-          Identification of the components of an air handling unit dual-flow and a chilled water production unit.

-          Commissioning and operating control of a plant.

-          Measurement of the operating parameters (air temperature, air humidity, air speed, differential pressure).

-          Study of heat exchange and transformation of air (electric heating coil, chilled water cooling coil, humidifier).

-          Drawing of air cycle on a psychrometric diagram.

-          Drawing of the characteristic curves of the air blower (pressure according to flow rate)

-          Air filter maintenance (measurement of pressure losses, replacement  operation of the filter)

-          Maintenance of the droplet separator (removal, cleaning, mounting)

-          Maintenance of the air blowing unit (removal of the belt, fitting a new belt, adjustment of alignment and of the tension)

Description

The CRA542 bench allows the study of an industrial air handling unit dual-flow type (two fans). It includes the classical elements of a network of air treatment, namely: filters, a cooling coil, humidifier, electrical heating coil, an air blower, exhaust blower and mixing dampers.

Students will initially identify the components of the plant and the direction of airflow.

They will then turn on the system under the conditions prescribed by the teacher (cooling mode or heating mode).

When the operating mode is established, they should measure the operating parameters (temperature, humidity, air flow rate) with portable devices provided.

The following work is to analyze the measurements by drawing the air cycle on a psychrometric chart and calculating powers exchanged.

The air handling bench is also made to perform maintenance operations:

-verification that the filters are clean (with differential pressure measurement) and replacement operation

-verification of the air blower operation (measuring the manometric height generated based on speed)

-cleaning droplets separator (with disassembly and reassembly operation)

-replacement of the air blower belt with disassembly operation, reassembly and adjustment of alignment and of the tension

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

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

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*Teaching suggested applications



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