Switching non timer extraction fan

[sparky1508]

Hi,

Can't seem to find anything in the regs but I have been asked to fit an extractor fan in a small cupboard containing some IT equipment which gets quite warm and it's just to dissipate heat out of the cupboard. My question is, as it's a fan without run on timer I am using T&E to power it and just wondering of its ok to use a standard 10 amp one way switch to isolate. Just wondering if I need to wire it so to isolate both line and neutral or whether it's ok to just isolate the line conductor as I don't seem to be able to source a double pole switch under 20 amps.

Thanks

 

[richy3333]

Looks good. What is the problem with using a stat and airflow?

Sorry, nothing. Everything that has been said I support. The unit is not designed to do what the customer wants i.e. its and intermittent fan. Also wiring a fan to a stat would be good as well as ensuring there is airflow into the cupboard.

Hope that clarifies what I was trying to say?

 

[sparky1508]

Yeh just trying to find a fan that is built for the job.

 

[sparky1508]

What about one of these 2

 

[richy3333]

Let your wholesaler do that and you can get on with work that pays.

 

[sparky1508]

Let your wholesaler do that and you can get on with work that pays.

Is that normal?

 

[Dave OCD]

Make sure you wire the stat to make rather than break on temperature rise - the opposite to a central heating thermostat.

 

[davesparks]

Is that normal?

Hell yes, get your wholesaler to do the legwork in sourcing what you need!

This is why you spend time developing a good working relationship with your local wholesaler, and of course buy them plenty of beer at Christmas time!

 

[mydigitalhome]

Suggest double check manufacturer instructions as often fan timer over run 3A and basic fan have found some are saying 1A fuse.

 

[Rpa07]

Make sure you wire the stat to make rather than break on temperature rise - the opposite to a central heating thermostat.

What stat would you recommend for this job - I need to do the same thing in my attic room, have wired ready but don't know much about thermostats. The changeover contacts - are they possible to reverse to make not break on all stats. Thanks


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[sparky1508]

What stat would you recommend for this job - I need to do the same thing in my attic room, have wired ready but don't know much about thermostats. The changeover contacts - are they possible to reverse to make not break on all stats. Thanks


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This is the one I've been looking at.

Not sure how good it is but downloaded the data sheet and it shows how to wire it for both heating and cooling.
Hope that helps.

 

[Rpa07]

Thanks sparky1508 - the changeover contacts is the relevant bit.


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