Diagram to wire a humidistat extractor

[manw]

I have an extractor in the bathroom that is wired to come on when the light comes on. It also has an isolator switch.

I would like to rewire the extractor to take advantage of the humidity sensor independently of the light switch but the box and instructions are gone and I cant find them anywhere online

The unit is the IsTok brand and I cant find the model number.


Can someone point my in the right direction? thanks!

 

[Taylortwocities]

Three questions:

1. Make and model of the fan
2. How do you want the fan to work? For example: come on when the light is on but also to operate if the humidity is high?
3. Does the existing fan run on for a period after the light is switched off?

 

[EFLImpudence]

Do you mean an integral or stand-alone humidity sensor and

do you mean not to come on with the light any more?

 

[manw]

Three questions:

1. Make and model of the fan
2. How do you want the fan to work? For example: come on when the light is on but also to operate if the humidity is high?
3. Does the existing fan run on for a period after the light is switched off?

1. IsTok, cant find the model number
2. Only to switch on when the humidity is high
3. No, but that would make sense if it did.

 

[AndyPRK]

Does the existing fan have 3 wire and an earth?

 

[Taylortwocities]

Surely there's a label inside the thing?