Recommended Smoke Alarms

[juwi_uk]

Hi,

I\'m using Ei161 and Ei166 (whether you use the ionisation or optical types depends on where you are using.  I\'m using mine in the hallways so dont know if it matters that much  as they both do much the same sensitivity-wise in this mode?  Mix and match is probably a good choice though.  Cant really advise beyond that as I\'m no fire alarm consultant!.  No different to buying at B&Q and trying to decide which is best.

I then use Ei128R relays.  I use one upstairs and 1 downstairs connected to individual zone inputs. The idea is I have redundancy and if one breaks the other will still work.  Because the alarms are linked by 3-core and earth cable they all go off at the same time anyway so you can probably do with just one relay.

Regards

Julian

[bryanajones]

so the Ei161 you\'ve used is a 240v 5A volt free relay too? (not really sure what volt free means?)

[juwi_uk]

Nor me.

You have to but the ei161 and the ei128R and one sits on top of the other.   There are no relays in the ei161.

Julian

 

 

[slychiu]

Volt-free (or \"dry\") contacts means that the relay contacts do not have any voltage.

The relay contacts can be connected to a Comfort Input which expects an open/close contact.

These mains operated heat and smoke detectors operate as standalone devices to sound when they detect smoke or heat but in order to connect to an alarm system, you need to have the relay base which provides a volt-free contact