Auto-On timer switch

 Hi All,
I am looking for a "auto-on" timer switch for bathroom fan
I wann to have the fan running constantly and only shutoff
when override, but it will turn back on after eg, 5 , or 10 minutes

there is not preset off time, I wanna to be able to turn it off at any time
and it will turn back on automatically.most timer nowaday are auto-off.

any suggestion is appreciated

thank you

 

One simple solution would be to use a "delay on make" timer. You'd be
able to turn the fan off and immediately back on, but it wouldn't
start again until the delay time expires. There are hundreds of
models, the most common and inexpensive are probably the fixed-time
types used in HVAC applications. About $10. This should get you
started
http://search.ebay.com/delay-on-make_W0QQfrppZ50QQfsopZ1QQmaxrecordsreturnedZ300

Wayne

 I can't think of anything off the top of my head that is
homeowner-oriented (cheap and easy to install).  Have you looked at
places like http://www.graingers.com  to see if they have any
spring-wound timers with NC contacts?

My approach to this problem would be to install a small 120VAC coiled
relay.  Hook the fan to the NC contacts and let a cheap spring-wound
timer control power to the coil.  Set the timer, energize the relay
coil and the contacts open, stopping the fan.  A simple under-$20
solution but you would have to wire it all up.

John




John De Armond
See my website for my current email address
http://www.neon-john.com
Cleveland, Occupied TN
All great things are simple and many can be expressed in single words:
Freedom, Justice, Honor, Duty, Mercy, Hope.  -Churchill

 Chris wrote:

simple , use a Pneumatic time lag sw ,wire the fan live to com and fan
to nc contacts , these are normally used for out side lights and stair
wells etc... but for the inverse function . please bare in mind that
these may not be suitable for mounting in a bath room and may have to be
located out of the room as per local reg's .
when I googled " Pneumatic time lag switch " google came up with the
first page of uk listings so these may be a uk only part ?
all of this may or may not be of help depending were you live .
just wandering , why do you need to operate the fan like that ?
Samuel c .

 

http://www.intermatic.com/Default.asp?action=subcat&sid –&cidS&did=5
you need SPDT such as FD32H
Use the normally closed contacts that oped during the timing.
Bill Kaszeta
Photovoltaic Resources Int'l
Tempe  Arizona  USA
bill@pvri-removethis.biz