RE: Alarm contacts in PVC windows

[Jean-Stéfane Bergeron <j.s.bergeron@xxxxxxx>]

Here is my experience -

When we built our house about 5 years ago, virtually all windows are
PVC
slider in a frame. I mounted the switch/sensor part of the contact in
the fixed frame "sill" about 9 inches from the corner. I then
placed two
"low profile" magnets in the frame of the double glazed window
using a
jig.

The magnet is only about 1/2" long and fit within the frame of the
window without getting too close to the glass assembly. I used a jig so
I could make sure I did not drill too deeply in the frame so as not to
break the seal of the double glazed glass assembly. It also ensured
that
the magnets would always be in the right location (this is important as
the smaller magnets have a lower "gap" tolerance).

As an added bonus, using two magnets allows me to alarm the window when
it is closed or partially opened (6") for ventilation. Anyone
opening
the window further would trigger the alarm.

The key here is to contact the manufacturer of the windows and make
sure
you know how much space there is between the outside of the frame and
the seal of the glass assembly. This took a bit of work but in my case
they finally gave me some drawings so I could figure it out. Gave
myself
some room for error (there's mostly) and built a jig. It worked very
well.

If you want more info, let me know. Hope this helps.

-----Original Message-----
From: Des Gibbons [mailto:des@xxxxxxx] 
Sent: January 20, 2003 9:15
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Alarm contacts in PVC windows


Hi Pankaj,

I am really wondering if there are special contacts, ie low profile
ones
etc. I suppose I really should look at alarm suppliers sites to see
what
would suit the job best.

Any advice appreciated at this stage :)

Cheers, Des.

> -----Original Message-----
> From: Pankaj Dhokia [mailto:pankaj@xxxxxxx]
> Sent: Monday, January 20, 2003 14:02
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Alarm contacts in PVC windows
>
>
> > Has anyone any experience of fitting flush mount (not surface
> mount) alarm
> > contacts in uPVC double glazing frames?
> >
> > I would rather do this, but most of the double glazing companies
> > have no idea.
>
> My dad has his own double glazing company. What seems to be the 
> problem or what advice would you like? I'm sure it can be done, but
> prolly at manufacturing
> stage to feed the wires through.
>
> http://www.automatedhome.co.uk
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