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Lights & Fans

whjohnson
Looking for pitfalls based upon direct experience here.

Bathroom inline timer fan on lighting cct comprising of 6 x GU10s fitted with LED lamps, no problem so far.

Customer has requested that a dimmer switch be fitted since the lamps are too bright - Six 5W warm white lamps.

I say 'Not a good idea, since the electronics in the LED dimmer switch could conflict with the electronics in the timer element of the fan motor.

Either way, damage could result, not to mention the extra cost of swapping out essentially new LED lamps for dimmible ones.

So, what happens when we fit a varilight dimmer switch to a cct comprising of 6 IP rated LED GU10s and a manrose 100mm inline timed fan in the loft above?

Am suspecting that the fan motor windings wouldn't be too happy either.

I have suggested instead, that we drop the lamp wattage down to say 3.5W rather than fit an expensive dimmer switch.
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    It might be OK provided the L to the fan is "undimmed" and only the SL (timer trigger) is via the dimmer - although I can't say I've ever tried it.


    There again the waveform chopping by the dimmer might cause interference with the timer electronics just by proximity, whether the fan is wired though the dimmer or not.


    I certainly agree that lowering the lamp wattage seems like a much more 'elegant' solution though.


       - Andy.
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  • 0
    It might be OK provided the L to the fan is "undimmed" and only the SL (timer trigger) is via the dimmer - although I can't say I've ever tried it.


    There again the waveform chopping by the dimmer might cause interference with the timer electronics just by proximity, whether the fan is wired though the dimmer or not.


    I certainly agree that lowering the lamp wattage seems like a much more 'elegant' solution though.


       - Andy.
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