AIR HANDLING UNIT – CRA542

AIR HANDLING UNIT - CRA542

AIR HANDLING UNIT – CRA542

Teaching Experimental Applications (View Data Sheet (pdf))

  • 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)

Technical Details (View Specification (docx))

Heating coil for fresh air simulation

-Electric coil with safety thermostat

-Three power stages: 2.5KW or 7.5KW or 5KW

Mixing air dampers between the fresh air and the recycled air -system of three dampers (fresh air, mixed air, exhaust air)

-manual adjustment of the position

-dampers linked by a hinge linkage

Air filters

-system consisting of two filters (opacimetric and gravimetric)

-the filters are removable

Measurement points for pressure losses of the filters (connection points of the portable device supplied)

Chilled water production unit supplying the cooling coil consisting of:

– chilled water production unit of 9KW inverter and reversible

– Solated buffer tank, volume 25L

-Float flow meter (160-1600L /h) and two thermometers (0-60°C)

-Graduated control valve for the flow rate -a filling valve and manometer (0-6 bars)

-Two manometers on the refrigerant circuit with double scale pressure/temperature

Humidified with adjustable flow rate 0-100%

-steam production: 5kg /h

– automatic filling and drain

Steam injector made of stainless steel with condensate drainage.

Air washer nozzle with the flow rate control valve and float flowmeter (1.2-12L /h)

Water supply comprising a stop valve, a 25μ filter and a pressure manometer (0-6 bars)

Droplet separator made of stainless steel, removable

Heating coil for air handling -electric coil with safety thermostat -power adjustable from 0 to 100%  (0 to 6.5KW)

Supply air blower

– motor and blower coupling by pulley-belt system

– motor with power 1.1KW mounted on a plate with tensioner

-centrifugal blower (70mmH2O-2900m3 /h)

Return air blower

– direct coupling between motor and blower

– variable speed motor with power 0.75KW -centrifugal blower

Electrical box of the installation:

The machine should have an electrical box compliant with European standards.

Contains at least:

-General power disconnect

– 30mA differential circuit breaker

-the necessary circuit breakers and relay circuitry for the operation

-the pushbuttons and indicator lights necessary for the operation

-Emergency stop button

–Speed controller for air supply fan -two dimmers for the handling coil

– Ammeter and voltmeter for measurement of the supply to the water chiller.

-Three potentiometers graduated from 0 to 100% for the control of:

Air blower ,  humidifier and  handling heating coil

-Four positions commutator for the selection of the power of fresh air coil (2.5KW, 7.5KW or 5KW

Instrumentation provided:

The machine  should come with the following portable instruments: -a portable digital anemometer -a portable digital thermo-hygrometer -a portable digital thermometer with two wire thermocouple probes -a digital differential pressure manometer Each unit is supplied in a briefcase with instructions for its use.

Dimensions: (LxWxH mm):

Air handling unit :  3595 x 960 x 1650 (2110 with the chimney)

Child water production unit : 2100x500x1670

weight (Kg):

Air handling unit : 390

Child water production unit : 260

Documentations

  • User Manual
  • Pedagogical manual
  • Technical documentation of the components
  • Lab exercises
  • Certificate of conformity CE

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