Instruction Leaflet
EI 170/171 Strobe and Vibration Smoke Alarm System, for the deaf and hard of hearing.
(or EI 156 - optical)
(With rechargeable battery
for one week standby)
the Institute of Electrical Engineers (UK). Failure to install this
system correctly may expose the user to shock or fire hazards.
This leaflet describes the installation of the EI 170 and EI
171 Systems.
Important: Read all instructions before installing. This leaflet must be left with the end user after installation.
N.B. If the system is not being used for some time the Control Panel power switch must be in the off position. This will
prevent the battery from being totally depleted and possibly
Do not turn on until it is fully wired.
Control Panel
The Control Panel should be permanently fixed to the wall
using the screws and plastic plugs enclosed. The screws
should be spaced 114 mm (4.5 in) vertically apart. The top
screw will be 27 mm (1.1 in) below the top surface of the control panel when installed. The screws (large heads) should be
screwed into the wall leaving a gap of approximately 4 mm
(0.15 in) under the head. Fit the keyhole slots on the back of
the control panel over the screw heads and slide the panel
down vertically into position.
The mains adaptor can be plugged into a socket. The socket
must not be used for any other equipment and it must always
be switched on.
It is preferable to permanently wire the unit into a mains junction box. Wire according to the following instructions.
Warning: First remove the power to the circuit at the distribution board. If you are in any doubt about how to do this, get
help from a qualified electrician.
The systems consist of:EI 170 System
EI 171 System
EI 151 Mains Smoke
Alarm (ionisation)
EI 173 Control Panel
(with built-in strobe)
EI 174 Vibration Pad
EI 172 Pattress (for
Smoke Alarm interface)
EI 156 Mains Smoke
Alarm (optical)
EI 173 Control Panel
(with built-in strobe)
EI 174 Vibration Pad
EI 172 Pattress (for
Smoke Alarm interface)
Connecting to mains junction box.
The mains lead wires are colour coded as follows:
1. Location & Installation
The Control Panel should normally be fixed such that the internal strobe light can be seen from the bed and the vibration
pad can be placed under the mattress or pillow. It has to be
powered from the mains (230 VAC) so a suitable power point
or junction box must be available to which it can be permanently connected. The Smoke Alarm must be located as described in the Smoke Alarm instructions supplied. Cable (10
m) is supplied to connect between the Control Panel and the
EI 172 Pattress for the smoke alarm. This can be extended up
to 50 m (20 ohms max.) with suitable low voltage cable if required. The smoke alarm supplied with the system may be interconnected with other EI mains powered smoke alarms up
to a maximum of 12 smoke alarms in total. Many dwellings require more than one smoke alarm for minimum protection.
See the smoke alarm instruction leaflet for detailed advise on,
interconnection, maintenance etc.
Warning: This mains operated system should be installed
and interconnnected by a qualified electrician in accordance
with the Regulations for Electrical Installations published by
brown: live
blue: neutral
The wire which is coloured blue must be connected to the terminal/wire which is marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the
terminal/wire which is marked with the letter L or coloured red.
The apparatus is not to be earthed, so no connection is to be
made to terminals or wires marked with the letter E, the symbol
or coloured green or green and yellow.
Bring the low voltage wiring to where the smoke alarm is to
be located. Route all wires neatly and securely along the walls
and ceilings.
Note: Turning off the power switch on the Control Panel
does not switch off the apparatus from the supply mains. The
switch removes the AC and battery power from the Control
Panel, but the mains transformer remains connected to the
supply mains.
Figure 2
Vibration Pad
Plug the vibration pad into its locking socket on the control
panel. Place the vibration pad under the pillow or mattress. It
is important that the person in the bed can feel the vibration check it is sufficient to wake a person by lying on the bed and
pressing the test button on the control panel - see also “Testing your system”. Some mattresses may not transmit sufficient vibration, and in these cases it should be fitted under the
pillow. Note: During testing, or in an actual alarm situation,
the pad pulses on and off for greater effect on sleepers.
Mains Smoke Alarm Interface Pattress EI 172
The pattress is used to mount the smoke alarm in its location,
to connect it to the mains and interconnect wires, and to connect it to the wires from the EI 173 control panel. (The connections from the non-isolated mains powered smoke alarms, to
the low voltage control panel wires are through an optoisolator in the EI 172 for electrical safety).
8. Push the plug on to the pins in the rear of the Smoke Alarm
and slide on to the mounting plate.
Interconnecting Smoke Alarms
A maximum of 12 EI 150/ 151/ 153/ 154/ 155/ 156
Smoke/Heat Alarms may be interconnected to one EI 172
unit. When one alarm senses fire all interconnected units will
sound and the control panel will turn on the strobe light and vibration pad (See Smoke Alarm instruction leaflet for further
details on interconnection wiring).
Warning: Do not connect to any other type of Smoke Alarm.
Doing this may damage the alarms and could result in a shock
or fire damage.
Note 1: An alarm with battery back-up (i.e. EI 151/154/156)
will continue to operate during mains failure and will be able to
signal the control panel if they sense fire.
The control panel also has battery back-up, so that it too will
operate during mains failure.
Figure 1
1. Choose the mounting position following the siting instructions in the Smoke Alarm leaflet. Remove the power from the
circuit you plan to use. The HMSO Building Regulations state
that self-contained Smoke Alarms should be permanently
wired to a separately fused circuit at the distribution board.
2. Where the incoming mains and interconnect wires are on
the surface of the ceiling or wall the appropriately sized ducting/conduit must be chosen to mate with the unit.
3. The low voltage wiring from the control panel must not be
run in the same conduit as the mains/interconnect wires.
4. Using a sharp knife remove material from the appropriate
knockouts making sure that there is no gap, either where
mated with the ducting/conduit or with the low voltage wires.
There are five knockouts, four on the sides and one on the
5. Screw the pattress to the surface using the two screws
and plastic plugs supplied.
6. Figure 1 shows the connections. Connect the incoming
live, neutral, and interconnect (from other smoke alarms if
present) to the pre-wired connector block. If an earth wire is
present connect it to the fourth terminal as shown. The Smoke
Alarm connector plug is already wired to the pattress. Connect
the red wire (remove the small piece of insulating tape first)
from the control panel to the terminal marked “R” and the yellow wire to the terminal marked “Y”. The black and blue wires
from the control panel are not used. They should both be connected to the spare terminal for extra strain relief.
7. Bring the connector plug out through the rectangular hole
in the mounting plate, line up the latch with its recess and then
screw the mounting plate on to the box as shown in figure 2
with the screws provided.
2. Testing your System
After Installation
1. Turn on the AC mains power to the smoke alarm circuit.
Check the continuous green light is visible on the smoke alarm
cover. The red light behind the test button will flash every 40
2. Plug in the control panel mains adaptor (or turn on the AC
mains if it is connected to a junction box). Slide the power
switch on the side of the unit to the “on” position. Check the
continuous green light on the control panel cover is visible.
3. Press the test button on the smoke alarm. The smoke
alarm should sound and the red light behind the button will
flash every second. After about 4 seconds the control panel
will start flashing the strobe light and the vibration pad will turn
on. Two people may be needed for this test. Interconnected
smoke alarms (where present) should also be tested in similar
4. Press the control panel test button. Check the vibration
pad is on and that the strobe is flashing.
Daily & Weekly Testing
We recommend that you test your system weekly by pressing all the smoke alarm test buttons and checking that the vibration pad and strobe light are operating. Also check at the
same time that the green power lights are visible on both the
smoke alarm(s) and the control panel.
Check daily that the vibration pad is in its correct position by
pressing the test button on the control panel.
Periodic Testing of Rechargeable Battery
The rechargeable battery takes about 20 hours to charge
from the control panel when it is first powered up. The panel
then maintains it in the fully charged state by continuous
trickle charge. In the event of a mains failure the battery will
power the system in standby for a week followed by at least 4
minutes alarm. When the mains fails, the green light is extinguished and the red light flashes rapidly on the control panel to
indicate it is on battery power. If the battery is starting to be
fully depleted the red light will go off to indicate the control
panel is totally unpowered. The battery will last 5 years in normal use provided it is not exposed to extremes of temperature
for prolonged periods, or fully discharged/charged a large
number of times.
We recommend that the functioning of the rechargeable
battery is checked at least yearly as follows:
(i) Ensure the control panel has been mains powered for at
least the previous 20 hours for the battery to charge.
(ii) Turn off the mains power to the control panel by unplugging it or switching off the circuit at the distribution board.
Check that the green light goes off and the red light starts to
(iii) Press the control panel test button for 20 seconds and
check the strobe flashes brightly and that the pad vibrates
strongly. Check that the red light continues to flash while the
test button is pressed. (Cover the strobe light with card to stop
this dazzling you while looking for the red light). This red light
flashing indicates that the battery is satisfactory. If the red light
goes off, or if the strobe is weak, or if the vibration is weak, the
battery will need to be replaced. Contact the nearest address
in this leaflet for advice about getting a replacement.
3. Troubleshooting
If the units fail any of the tests after installation outlined
above, the system has probably been incorrectly wired and/or
all units are not connected. Check all wiring carefully. If the
green power lights on the smoke alarm and/or the control
panel are not on, check the wiring to the mains and that the
mains is not off (e.g. due to a tripped circuit breaker or fuse).
Check the power switch on the control panel is on.
The control panel monitors the wiring to the vibration pad
and the smoke alarm pattress for faults.
(i) If the vibration pad is removed or if its wiring is open circuit, the control panel will flash the strobe.
(ii) If the wiring to the smoke alarm pattress is disconnected,
open circuited or short circuited, the control panel will turn on
the vibration pad and the strobe light.
There are no user serviceable parts in this unit. If it is though
to be defective, it must be returned to the manufacturer for repair or replacement (see “Product Guarantee” section).
4. Accessories and other Features
Control Panel “Aux. Output”
The auxiliary output turns on when the control panel is in
alarm and can supply up to 200 mA at 12 Volts (range 10 to 14
Volts). (Note: the positive terminal is the pin next to the
“Clock Input” socket). An Auxiliary Strobe EI 178 is available
and is supplied with 10 m of cable and a suitable plug. It can be
located, for example, where it is readily seen during the day
(e.g. downstairs hallway). An extra Vibration Pad EI 174 is
available with 2 m of cable and a plug for connecting it to the
auxiliary socket.
Control Panel “Clock Input” socket
A suitable alarm clock (with a 5 to 24 Volts AC or DC output electrically isolated from the mains supply) can be connected
to this input socket with a 3.5 mm mono jack plug. When the
alarm clock triggers, the vibration pad turns on to wake the
person, but the internal strobe or auxiliary output do not turn
on.This lets the user know it is a wake-up call and not a fire.
Therefore the user needs only one vibration pad under their
pillow or mattress.
Triggering Control Panel into Alarm Externally
A manual fire alarm switch (e.g. a glass break type) can be
used to get the control panel to turn on the vibration pad and
strobe light. This is done by connecting the red and yellow
wires, from the control panel, together, with the switch (or
volt-free relay isolated contacts). The wires from the switch
can be connected into the circuit at the pattress terminals.
Note: This does not cause the smoke alarm to sound.
Adding an EI 158 Smoke Alarm Pattress with relay
to the system
The EI 158CS/158P Pattress is used where volt-free relay
contacts are required to signal to other equipment when one of
the smoke alarms sense fire. For example the relay can be
used to signal to a warden call system, or to turn on lights.
If there are more than two smoke alarms in the system the
first smoke alarm can be mounted on the opto-isolator pattress EI 172 as described above. The second smoke alarm, interconnected to the first, can be mounted on the relay pattress
EI 158CS / EI 158CSR or EI 158P / EI 158PR. When any
smoke alarm senses fire the EI 172 pattress will signal the
control panel into alarm and the EI 158 pattress will switch its
relay contacts. Note: If both an EI 172 and an EI 158 are being
used only 6 smoke alarms may be interconnected together on
the system.
Power Requirements
The typical currents at 230 VAC are
· Standby 10 mA
· Alarm
50 mA
5. Product Guarantee
Ei Electronics guarantees this system for one year from the
date of purchase against any defects that are due to faulty materials or workmanship. This guarantee only applies to normal
conditions of use and service, and does not include damage
resulting from accident, neglect, misuse, unauthorised dismantling, or contamination howsoever caused. This guarantee excludes incidental and consequential damage. If this
system should become defective within the guarantee period,
it must be returned to the nearest address in this leaflet. It must
be carefully packaged with the power switch on the control
panel in the off position, and with the problem clearly stated
along with proof of the date of purchase. We shall at our discretion repair or replace the unit. Do not interfere with the system or attempt to tamper with it. This will invalidate the
guarantee, but more importantly may expose the user to
shock or fire hazards.
This guarantee is in addition to your statutory rights as a consumer.
Manufactured by Ei Electronics.
Shannon, Co. Clare Ireland.
© 2001
P/N B12206