PIR for fan

[PKECS]

I have fitted and externa flush mounted PIR in a bathroom to switch 2 x 50w halogens and 1 x timer fan if i take the fan out the circuit it works fine if i leave it in the PIR just flickers on and off i think its proberly the electronics in the fan so im thinking will it make a difference if i put a standard fan in. Im sure you can switch a fan with a PIR.
Thanks in advance

 

[Wotsit]

PIR's are not generally designed for switching inductive loads, how about putting a relay in?

 

[pushrod]

I have fitted and externa flush mounted PIR in a bathroom to switch 2 x 50w halogens and 1 x timer fan if i take the fan out the circuit it works fine if i leave it in the PIR just flickers on and off i think its proberly the electronics in the fan so im thinking will it make a difference if i put a standard fan in. Im sure you can switch a fan with a PIR.
Thanks in advance

Think these can often have a switching capacity which will vary according to the device being switched . What is the power of the fan? Could be worth checking the technical spec of the PIR switch.

 

[Darkwood]

I have fitted and externa flush mounted PIR in a bathroom to switch 2 x 50w halogens and 1 x timer fan if i take the fan out the circuit it works fine if i leave it in the PIR just flickers on and off i think its proberly the electronics in the fan so im thinking will it make a difference if i put a standard fan in. Im sure you can switch a fan with a PIR.
Thanks in advance

Have you got a permanent supply to fan for timer board with a sw from the pir detector, also check the switching load the pir can handle also are the lights 12v or 230v.

 

[Romans99]

Fans do struggle On a PIR switched circuit.

Ive used PIR fan units so that the fan comes on without the need for the lights to be on.

Meaning you can go in there and take a dump in broad daylight without needing to put the lights on.

Xpelair DX100PIR Extractor Fan with PIR

 

[PKECS]

The PIR is rated at 2000w and my next step is to put a relay in but not really a nice touch trying things infront of a customer but i will give it ago thanks all

 

[The Truth]

The PIR is rated at 2000w and my next step is to put a relay in but not really a nice touch trying things infront of a customer but i will give it ago thanks all

right take a step back...

forget the relay idea..jesus talk about over complicating things.

firstly a 2kw PIR is MORE than man enough to switch your lights and piddly fan.

secondly the PIR has its own timer so you shoudnt use a fan with timer. They will conflict with eachother as you mention.

solution.

link out the timer module in the fan ( link between P live and SL ) so that only the PIR timer is controlling things. Now if it still clicks on and off repeatedly...its faulty so replace.

or

fit PIR fan or separate PIR exclusively for the fan

where should i send the bill?

 

[Romans99]

Yeah I agree.
PIR fan and then do whatever you want with the lights.

 

[PKECS]

Yer the only problem with that is i cant alter the wiring cause its a sealed ceiling and the feed goes through the PIR il try a normal fan cheers

 

[marksparky]

just link out feed and switch wire on the fan u already have first lad