Re: Smoke & gas detectors

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

Nigel -

'sounds good ...

incidentally, do you use a particular supplier for all your electrical
supplies -  cable, conduit, boxes & fittings & electronics ... one
that
you would recommend ?

Chris




Nigel Giddings wrote:

> Chris,
>
> As with all Fire Systems they have battery backup, in this case 2 x
12v
> 2.1AH sealed lead acid batteries. I think this gives autonomy for 3
> days... The panel even checks the batteries and gives a fault
condition
> if they are not charging properly...
>
> I have to say I am impressed with it as a bit of kit.
>
> Nigel
>
> -----Original Message-----
> From: Chris Hunter [mailto:cjhunter@xxxxxxx]
> Sent: 09 April 2006 11:16
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Smoke & gas detectors
>
> Nigel -
>
> Interesting ... I couldn't work out if there was a back-up power
> arrangent in case of power-cuts ... although I imagine the generator
> cocers that, in your case !   Actually, that's a thought ... what will
> happen when the generator powers-up ... the short delay, the variable
&
> perhaps noisy voltage ... will the Rafiki be OK ?
>
> Chris
>
>
>
> Nigel Giddings wrote:
>
> > Chris,
> >
> > My last visit from the BCO ended up with him asking for smoke
> detectors
> > in the following rooms; Kitchen, Dining Room (Open Fire), Living
Room
> > (Open Fire), Study, Hall, Master Bed dressing room. As you
probably
> know
> > these need to be mains operated and linked...
> >
> > Having looked at the options and deciding I wanted to add a few
more
> > detectors in the Basement (inc Node 0) and Loft (Node 3 and
storage),
> I
> > thought it would make sense to go for a 'system' rather than the
more
> > normal self contained units looped together with 3 core and
earth.
> >
> > I have gone for the Rafiki Twinflex system
> >
> > http://www.rafikiprotection.com/twinflex.html
> >
> > It has a central control panel with dry contacts for fault, zone
1
> > alarm, and zone 2 alarm. You can add remote repeater panels and
link
> > several panels together (they do a 4 and 8 zone version as well).
Each
> > zone can support upto 32 sensors (heat and or smoke by DIL
switch)
> which
> > have sounders built in...
> >
> > One feature I particularly like is the 'Evacuate' signal. EG if
Zone 2
> > has an alarm (in my case 1st Floor / Loft) Zone 2 will give a
constant
> > alarm and Zone 1 will give an intermittent 'evacuate' alarm, so
if
> > people are in the basement they know to get out and that the fire
is
> on
> > the 1st floor or in the loft...
> >
> > For those who want more HA stuff it also does what it calls
'class
> > change'. You may remember from school the Pips at the end of a
Class
> > Period... The panel has an input to allow this to be triggered.
Could
> be
> > used as a movement indication if linked to PIRs, but I'm sure
this
> would
> > drive you mad eventually...
> >
> > As far as I know no Gas detectors are available but these could
be
> > interfaced via the dry contacts to trigger a zone.
> >
> > Wiring is simple as it is only two cores per zone (some sort of
data
> > bus). To meet British Standards it needs to be wired with FP200,
and
> > though this is expensive it is very easy to use. It looks like
Pyro
> but
> > no special tools required.
> >
> > A picture here, not the most useful
> >
> > http://photos.corbenic.co.uk/photos/photo236.html
> >
> > One thing to bear in mind is that you should use the approved P
clips
> > and or Stainless Steel cable ties...
> >
> > HTH
> >
> > Nigel
> >
> > -----Original Message-----
> > From: Chris Hunter [mailto:cjhunter@xxxxxxx]
> > Sent: 09 April 2006 01:02
> > To: ukha_d@xxxxxxx
> > Subject: [ukha_d] Smoke & gas detectors
> >
> >
> > 'am looking for sensors to go with HA, and Googling brings up far
more
> > makes & models than I'd expected ... with prices anywhere
from below
> > 5GPB to over 90GPB ... some battery, some mains, some both, some
> > low-voltage, some smoke & gas in one ... etc.   I need some
that work
> > well & reliably & offer zero-volts ralay contacts &
look good or at
> > least acceptable.   Can anyone recommend particuar ones, please -
> 90GBP
> > seems OTT to me, and 5GBP seems NVM !
> >
> > Chris