PDF for Purex Digital Fume Extraction Machines: 200, 200i, 200i-HP, 300i, 400, 400i, 400i PVC, 800, 800i, 800i PVC, 1500i, 2000i, 5000i
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DIGITAL CONTROL PANEL
Switching the machine ON/OFF
To switch the machine ON press the central button on the keypad. The central button will illuminate (green) and the motor run indicator on the graphic display will rotate. Pressing the central button again will switch the machine OFF, extinguish the green light and the motor run indicator on the graphic display will stop rotating.
Adjusting the airflow rate:
To adjust the airflow rate press the UP and DOwN buttons together. Both buttons will then begin to flash (red). To increase the airflow rate press the UP button, to decrease the airflow rate press the DOwN button. The target airflow measurement is shown on the graphic display together with the actual airflow being achieved by the fume extractor. Once the target value has been set, do not touch any other buttons. After a few seconds the buttons will cease to flash and the set value will be stored.
What airflow rate to set?
For most applications a good starting point is a flow rate of 50% of the machines maximum capability. Check the fumes are being removed by site observation and appropriate measurement. Then increase or decrease the flow rate as appropriate. Please note that setting the flow level unnecessarily high may reduce filter life.
Fully automatic operation
The airflow rate is the only parameter that needs to be set by the operator. The Purex machine will automatically maintain the airflow level you have set without any further intervention required.
Graphic Display
The graphic display shows the operating status of the machine in one easy glance.
Filter Fault Indicators Note
Some machines use a single combined particle / chemical filter while others employ separate chemical and particle filters. Therefore the machine icons and filter positions (see 5,6,7) may vary depending on the type of machine you have.
Filter Status (1,2,3)
Purex Digital machines warn the operator if the chemical filter is saturated or the particle filter is blocked. Sensors are also used to warn the operator if particles or gas are passing through the machine into the workplace due to a missing, damaged or incorrectly fitted filter.
When gas or particles are sensed or the filter is nearly saturated/blocked, the machine will warn the operator with an audible chime and the keypad will flash (red).
At this point the appropriate filter icon (see 5,6,7) will flash to show which filters may need attention. See Changing Filters Section.
Exhaust Temperature (4)
When the machine temperature rises above a preset limit the machine will warn the operator with an audible chime every 20 seconds and the keypad will flash (red) every 10 seconds. This feature allows the operator time to identify the problem. If the problem continues then the machine will chime and the keypad will flash (red) every 1 second. See problem solving section.
Motor Run Indicator (8)
This icon will rotate when the motor is running.
Target Airflow / Actual Airflow (9,10)
The operator can set the target airflow to the level they require, although in most cases this will be factory preset at the correct level. The Purex machine will automatically raise or lower the motor speed as required until the actual airflow rate equals the target airflow rate.
Positioning the machine
The machine should be as near to the process as possible with space allowed for the following access: • Internal maintenance • Control panel, replacing filters • Exhaust air + cooling air, electrical connections, hose connection Once in position, lock the two front castors by depressing the foot levers (if present).
Hose connection
Incorrect connection or layout of hose can cause poor airflow, blockages and potentially dangerous build up of fume. Use the shortest length of hose possible and keep bends to a minimum. Your supplier can advise you of appropriate diameters and layouts of hose for your particular application. • It is best practice to use the connection kit supplied. • Do not reduce the diameter of the pipe / hose too much. The use of small diameter pipe / hose or nozzles can reduce the performance of fume extraction systems and so should be avoided • If a special connection kit or attachment is required please contact Purex or your local agent. Ensure all connections are properly sealed and that there are no kinks in the hose. Once secured in position, connect the hose/s to the inlet/s on the machine either by pushing the hose onto the inlet or by using the connections supplied
Electrical Connection
Various connection methods are available to order. Prior to connecting the power supply, ensure that the voltage, frequency and power requirements are correct as shown on the label attached to the cabinet rear ( Note - These are MAX values). It is important that the local supply is protected by a circuit breaker of the correct rating, and the cabling and plug type used are similarly rated. Ensure plug is accessible as a disconnect device or use a similar method of isolation. Purex recommend the use of a dedicated supply to their single phase units. • In the case of single phase equipment a 13A fused spur is recommended. • All units should be protected by a 16A Type C circuit breaker in the customer’s circuit. • Purex International do not recommend the use of RCDs but where their use is mandatory, single phase units (up to and inc 1500i) require a 300mA RCD type A and 3 phase units (2000i & 5000i) require a 300mA RCD Type B. • Machines up to and including the 600 model are supplied with a power cable and plug attached according to your order. • Machines from 800 model upwards are supplied with a fixed power cable without a plug. These machines should be hard wired into the electrical supply by a qualified electrician following local regulations and practices.
Warning status - is an audible chime every 20 seconds and the keypad flashing (red) every 10 seconds. This stage allows the operator time to identify the problem and take appropriate action e.g. acquire a replacement filter.
Alarm status - is an audible chime and the keypad flashing (red) every 1 second. At this point the problem should be identified and remedial action taken immediately.
Filters - Some machines use a single combined HEPA / Chemical filter while others employ separate HEPA and chemical filters. Therefore the machine icons may vary depending on the type of machine you have.
