Installing extractor fan in bathroom xpelair cf20tx

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Rudie

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Hi I am installing a fan but the wiring isn’t well documented on the instructions. I have wiring as per photo1 on the isolation switch on the outside but on the fan itself, there is a L, N and T. When I isolate/turn off the switch, no power comes in. When I turn it on, there is power to the black and brown wires. So really doesn’t matter where I wire these to the fan - L or T?
Unless the electrician has wired the switch wrong?

Thanks in advance.
 

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Rudie said:
. So really doesn’t matter where I wire these to the fan - L or T?
Unless the electrician has wired the switch wrong?
Click to expand...
The T connection should be controlled by another switch - usually the light switch..

Does the fan not come on when the light is switched on?.
 
Hi, it’s a humidistat mainly for the shower so not fussed about it coming on when the light is turned on, want it to come on when the humidity is high.
 
Rudie said:
Hi, it’s a humidistat mainly for the shower so not fussed about it coming on when the light is turned on, want it to come on when the humidity is high.
Click to expand...
It would come on with the humidistat even if it were switched by the light switch.

If you don't want it to come on with the light then your thinking about the wiring is correct.
 
This came in the pack too- not sure if I need this?
 

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Humidistat fans can be very poor , you need the fan to extract long before any moisture build up , unless perfectly sited the room will be full of moisture and wetting the walls before than fan can compensate , it also needs to be more powerful to compensate for the delayed start .
 
foxhole said:
Humidistat fans can be very poor , you need the fan to extract long before any moisture build up , unless perfectly sited the room will be full of moisture and wetting the walls before than fan can compensate , it also needs to be more powerful to compensate for the delayed start .
Click to expand...
I've found the envirovent ones work very well when set to the most 'sensitive' setting
 
foxhole said:
Very difficult to place them in the ideal position.
Click to expand...
Yes i can imagine... mine is in zone 2 (which is ok as they are ip45 rated), so steam from a shower sets it off very quicky
 
We found the outside humidity (raining) set the fan going as the fan was on an outside wall so short duct. Increased the humidity setting but then it didn't come on quickly enough during shower.
So we just use the timer mode.
 

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