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Mobile Fume Extractors
Extraction Arms & Fans
Plymovent Extraction Fans
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Plymovent Plastic Tube Arms
Plymovent Extraction Arm Accessories
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Control Equipment
FlexHood
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Extraction Arm Spare Parts
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Plymovent Fan Spares
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Plymovent Filters
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Easy Solutions For Source Extraction
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Straight answers to the questions people ask most when choosing and fitting spare parts for mobile extraction fan units.
Check the data plate for the unit type and electrical details, and use the manual or parts diagram. Note the voltage, frequency and number of phases, because motors and switches are made for specific supplies.Photographs of the unit, its plate and the old part help our team match the right spare.
A motor protection switch combines a manual on-off switch with overload protection for the motor. It trips if the motor draws too much current, protecting it from damage.If the switch is faulty, damaged or keeps tripping for no reason, it may need replacing. A tripping switch can also point to a motor, wiring or blockage fault, so investigate the cause first.
The switch must have a current range that covers the motor's rated current, which is on the motor plate. The switch is then adjusted to the motor's rated current.A range that is too high gives poor protection, and one too low trips unnecessarily. Have a competent electrician select and set it.
Common causes are an overloaded or blocked fan, a failing motor or bearings, a damaged wheel rubbing the housing, low or unbalanced supply, or a fault in the protection switch itself.Isolate the unit and check for blockages and damage. Have an electrician investigate rather than simply resetting repeatedly or turning up the setting.
Match power, voltage, phases, frequency and mounting to the original. A single-phase motor cannot replace a three-phase one directly, and a different power rating changes the airflow and load on the fan.Check the data plate on the old motor. Fit the sealing parts supplied, and have the electrical work carried out by a competent person.
Motor speed, and so airflow and motor loading, depends on the supply frequency. Motors and fan parts are often made in versions for 50 Hz or 60 Hz supplies, and UK mains is 50 Hz.Using a part made for a different frequency can change performance and put extra load on the motor. Check the frequency on the data plate of your own unit and its motor, and make sure any replacement is marked for the same supply before you order or fit it.