DraftMax Basic Spare Parts FAQs
Straight answers to the questions people ask most when finding and fitting spare parts for a downdraft extraction table.
How do I identify the right spare part for my downdraft table?
Start with the data plate on the table or its control cabinet. It gives the model, serial number, voltage, phase and frequency, and these decide which electrical parts and which motor or fan wheel fit.
Then look at the part itself. Electrical parts usually carry a reference or rating printed on them, and the wiring diagram and parts list in the manual show how each item is described. If you cannot match a part with confidence, send the data plate details and a photo to our team before you buy.
Can I fit electrical spare parts myself?
Only a competent person should work on the electrical parts of a table. That means someone with the training to isolate the supply safely, prove it is dead, work on the control circuit and test the unit afterwards. If your workplace has a maintenance electrician, they are the right person.
Always isolate the table at its main switch and lock it off before opening any cover. Follow the wiring diagram in the manual, and have the unit checked before it goes back into use.
What does a thermal relay do and how should it be set?
A thermal relay protects the motor. If the motor draws too much current for too long, for example because the fan is jammed or a phase has dropped out, the relay trips and stops it before the windings overheat.
It has an adjustable current range, and the setting should match the full-load current shown on the motor data plate. Setting it too high removes the protection, and too low causes nuisance tripping. Always choose a relay whose range covers the motor's rating, and leave the setting to a competent person.
What is the difference between normally open and normally closed switching elements?
A switching element is the contact block behind a push button. A normally open element completes the circuit only when the button is pressed, which is the usual arrangement for a start function. A normally closed element breaks the circuit when pressed, which is the usual arrangement for a stop function.
If you fit the wrong type, the button will do the opposite of what its label says. Check the existing element before you replace it, and test the stop function carefully.