Specifications

SMOKE & HEAT ALARMS
Frequently Asked Questions
7
All of the Ei alarms are designed for ceiling mounting and will under
most circumstances perform better if sited in this position. If it really is
not practical to mount them on the ceiling, a Smoke Alarm can be
wall mounted with the top edge 15-30cm from the ceiling. Ensure
that it is 30cm away from any corner or obstruction which may
impede the movement of smoke to the alarm. Do not wall mount
heat alarms.
We recommend that under normal circumstances Smoke and Heat
Alarms should only be interconnected within the confines of a single
family dwelling. If they are connected between different units, there
may be excessive nuisance alarms and it can be difficult to locate
and silence the unit causing the alarm. However, there is no
technical reason why up to 20 alarms cannot be interconnected in
a single system that encompasses a number of individual dwellings
- such as may be required in an HMO, for instance. In circumstances
such as these, a very high level of system design, management and
maintenance is necessary to reduce the level of nuisance alarm.
The minimum requirement should be to install a System Remote
Control Switch Ei1529RC on each floor of the property. By pressing
the locate switch, all alarms in the system are silenced, for a period
of approx. 8 - 10 minutes, except for the unit initiating the alarm
state. This allows time to rectify the problem before the system is
automatically reinstated to full working order.
There are a number of options available for using a relay with Ei
Smoke and Heat Alarms. All the relays have volt-free output
contacts rated at up to 240V and have both Normally Open and
Normally Closed connections. There are relay options available for
use with mains operated devices such as bells, sounders and door
closers. In addition, there are relays available with a battery back-up
for use with devices that will operate even in the event of a mains
failure, such as Warden Call Systems. The relay can be mounted
under an alarm, or can be remotely sited using the optional cover
for electrical safety.
Technically it can be used but if the system has to comply to BS
5839: Pt 1 it may not meet all the requirements. For example, it is not
possible to silence the sounder in the smoke alarm from the control
panel. Many regulatory bodies now recognise that a dual system
(smoke/heat alarms in the individual occupancies and a Pt.1 system
in the communal areas) in HMOs can be an extremely effective
means of reducing the incidence of false alarms. In this instance,
subject to approval, it could be an advantage to have this link.
20. Can I fit the
Smoke or Heat
Alarm on
the wall?
21. How many
Smoke and
Heat Alarms
can I link
together?
22. Can I use a
relay to signal
other devices?
23. Can I use the
relay to
connect
to a 24 Volt Fire
Alarm System?