product guide
optical detector
multisensor detector
heat detector
mounting bases
product guide
...conventional detectors from Apollo
orbis™ is a range of conventional detectors
Contact points for
which has been developed and tested to create
advantages for fire engineers and installers, as well as
owners and users of buildings.
enquiries and help
Orbis is an entirely new range with modern styling and
a completely revised mounting base. It is electrically
compatible with Apollo Series 60 and Series 65
ranges of conventional detector (see Technical Data).
Technical queries
techsales@apollo-fire.co.uk
Resources
(literature, photos)
marketing@apollo-fire.co.uk
Orbis is a demonstration of Apollo’s commitment to
the market for high quality conventional detectors for
use in small to medium size installations. In developing
this range Apollo has put ease of installation and
reliability in daily operation at the forefront of
considerations. The attractive and compact design
means that Orbis will blend in well with all
architectural styles.
Sales enquires
sales@apollo-fire.co.uk
Phone number for
all departments
+44 (0)23 9249 2412
Fax for all departments +44 (0)23 9249 2754
Website
www.apollo-fire.co.uk
Orbis is manufactured in Apollo’s factory near
Portsmouth, England
Orbis has been tested and approved to the following
standards:
EN 54–7: 2000
optical smoke detector
EN 54–7: 2000 & CEA 4021: 1999-06
multisensor smoke detector
EN 54–5: 2000
heat detector
Assessed to ISO 9001: 2000
Certificate number 010
Detectors have been declared as being compliant with the essential requirements of the
EMC Directive 98/336/EEC and the
Construction Products Directive 89/106/EEC
Information in this guide is given in good faith, but Apollo Fire
Detectors cannot be held responsible for any omissions or errors.
The company reserves the right to change specifications of
products at any time and without prior notice.
© Apollo Fire Detectors Limited 2004
2
index
Contact points for enquiries and help
Range of Products
Features of Orbis™
Choosing a detector: questions and answers
2
4
4
4
Orbis optical smoke detector
Where to use optical smoke detectors
How does the Orbis optical detector work?
Environmental performance
Technical Data
6
6
7
7
7
Orbis multisensor smoke detector
Where to use multisensor smoke detectors
How does the Orbis multisensor detector work?
Environmental performance
Technical Data
8
8
8
8
9
Orbis heat detector
Where to use heat detectors
Choosing the correct class of heat detector
How do Orbis heat detectors work?
Environmental performance
Technical Data
10
10
10
11
11
11
Orbis TimeSaver Base®
Installing Orbis
Fitting Orbis detector heads
Orbis Features—LED Status
12
12
13
13
Relay Base
14
Commissioning made easy
StartUp
What StartUp indicates
FasTest®
Smoke or Heat Testing
14
14
14
14
15
Maintenance and Servicing
DirtAlert
15
15
3
Range of Products
Orbis comprises an optical smoke detector, a
mutisensor smoke detector, heat detector types
A1R, A2S, BR, BS, CR and CS, a standard
electronics-free base, a diode base, a relay
base and a Sav-Wire base.
Choosing a detector:
questions and answers
The Orbis range does not include an ionisation
smoke detector. Are ionisation detectors redundant?
Features of Orbis ™
Ionisation detectors have been used for many years
as extremely reliable smoke detectors. They have
traditionally been recommended for use where the
fire risk is likely to include very small-particle smoke.
Orbis incorporates entirely new designs, both
mechanical and electronic. The aim has been
to increase the attractiveness of the detector, make
installation quicker, enhance the reliability of
detection and reduce the incidence of false
alarms. Orbis features:
Standards such as EN54 recommend both ionisation
and optical detectors as good general purpose smoke
detectors.
• modern styling
One reason why ionisation detectors have become less
popular is that they are more sensitive to phenomena
that cause false alarms than optical detectors.
• TimeSaver Base® designed for fast
installation and cable termination
Any other reasons?
Ionisation detectors use a tiny radioactive foil.
Although they are entirely safe to use, ionisation
detectors are subject to strict regulations concerning
transport, storage and disposal. Thus it is becoming
increasingly difficult to use ionisation detectors.
• a wide voltage and operating temperature
ranges
• StartUp™ for fast commissioning
• DustDefy™ housing which limits ingress
of dirt into detector
• new optical sensor for high reliability and
reduced false alarm incidence
Should I use optical detectors to detect smoke in all
applications?
As stated, optical detectors have long been recommended
as good general purpose smoke detectors. Laboratory
tests have been carried out to compare the performance
of optical detectors in the standard test fires described
in the European standard EN54.
• new multisensor smoke detector for
detecting fast-burning fires
• algorithms for transient rejection
• chamber designed to inhibit dirt penetration
and thus reduce false alarms
The results of these tests are given in Fig 1. The graph
shows the acceptable response in terms of smoke
density which is given as ‘m’ on the y axis. Detectors
must respond before the end of test which is an ‘m’
‘=value of 2. The performance of Orbis detectors is
given as a solid line which shows how evenly the
optical detectors respond to the test fires.
• automatic drift compensation with
DirtAlert™ warning
• FasTest® which reduces the time taken to
test detectors
• optional flashing LED to indicate normal
operation
If detectors respond too quickly (the lower shaded
portion of the graph) they may be too sensitive and
hence likely to generate false alarms.
• SensAlert® which indicates that the detector
is not operating properly
If detectors respond too slowly (the upper shaded portion)
they are in danger of not changing to the alarm state
before the end of test.
Orbis features and part numbers vary according
to territory. Please refer to your price list or
distributor for individual part numbers.
An even response in the centre is the ideal response.
4
© Apollo Fire Detectors Limited 2004/JDR
2.00
Poor
1.50
Optical
density 1.00
(m value)
When would I use a multisensor?
Multisensor smoke detectors have a heat sensing element
which makes them more sensitive if a fire develops
heat as well as smoke. This speeds up the response of
the detector in certain fires where heat is generated
rapidly, for instance in test fire TF5, which is an open,
flaming liquid fire in which n-heptane is burned.
Acceptable
values
0.50
0.00
TF2
TF3
TF4
Too sensitive
TF5
Test Fires
Fig.1
Orbis Optical detector response to Test Fires
© Apollo Fire Detectors Limited 2004/JDR
Multisensor smoke detectors are recommended for
open flaming fire risks.
2.00
If there is any doubt as to whether an optical detector
or a multisensor smoke detector should be used it is
wise to fit a multisensor smoke detector.
Poor
1.50
Optical
density 1.00
(m value)
Where would there be a need to install heat detectors?
Heat detectors should be used if it is not possible to
use smoke detectors. This will be the case where
normal industrial processes produce substances which
could be mistaken for smoke by a smoke detector, eg,
flour mills, textile mills or loading bays with dieselengined vehicles.
Acceptable
values
0.50
Too sensitive
0.00
Orbis Optical
Orbis Multisensor
Test Fires
Fig.2
The type of substance encountered here would cause
frequent false alarms if smoke detectors were fitted, so
a heat detector is used instead.
How are heat detectors classified?
EN54 classifies heat detectors according to the ambient
temperature in which they will be working and
according to whether they may be tested as ‘static’
detectors (changing to alarm at a preset temperature)
or ‘rate-of-rise’ (changing to alarm at a preset increase
of temperature).
Heat detectors may also be marketed without either
classification; but then the detection characteristics
are unknown.
All Orbis heat detectors are tested and classified as
either static or rate-of-rise.
So what is the best way to choose a heat detector?
To make things easier we have produced a flow chart
which is shown on page 10.
5
Comparisons of response between Orbis Optical & Multisensor
Where to use optical smoke
detectors
Optical smoke detectors have always been recognised
as good detectors for general use. They are regarded
as particularly suitable for smouldering fires and
escape routes.
The performance of Orbis optical detectors is good in
black as well as in white smoke. In this respect Orbis
is different from traditional optical smoke detectors
which perform far better in white smoke than in black.
Orbis optical detectors are also designed to reduce
significantly the incidence of false alarms through
over-sensitivity to transient phenomena.
Orbis optical detectors are recommended for use as
general purpose smoke detectors for early warning of
fire in most areas.
optical smoke detector
orbis optical smoke detector
The sensing technology in the Orbis optical smoke
detector is significantly different in design from previous
optical detectors. A full description is given in the
section ‘How do orbis optical smoke detectors work?’
but the advantages of this system and its associated
algorithms are:
• improved sensitivity to black smoke
• compensation for slow changes in sensitivity
• extra confirmation of smoke before alarm signal
given
The algorithms are used to verify signals from the
sensing chamber, to filter out transients and to decide
when the detector should change to the alarm state.
All this combines to increase detection reliability and
reduce false alarms.
6
technical data
All data is supplied subject to change without notice.
Specifications are given at 23°C and 50% relative humidity
unless otherwise stated.
DETECTOR OPERATING
PRINCIPLES
How does the orbis optical
detector work?
Principle of detection:
Photo-electric detection of light
scattered by smoke particles
over a wide range of angles.
The optical arrangement
comprises an infra-red emitter
with a prism and a photo-diode
at 90° to the light beam with
a wide field of view. The
detector’s microprocessor
uses algorithms to process
the sensor readings.
Orbis operates on the well established light scatter
principle. The remarkable optical design of the Orbis
optical smoke detector allows it to respond to a wide
spectrum of fires.
The sensing chamber of the Orbis optical smoke
detector contains an optical sensor which measures
back-scattered light as well as the more usual forwardscattered light. Sensitivity to black smoke is greatly
improved.
Sampling frequency:
Once every 4 seconds
The detector is calibrated so that Orbis is highly reliable
in detecting fires but is much less likely to generate
false alarms than ionisation smoke detectors.
ELECTRICAL
Supply wiring:
2 wires, polarity sensitive
Maximum polarity reversal:
200ms
Power-up time:
<20 seconds
The sensing chamber has been designed to keep out
dust and other airborne contaminants.
Minimum ‘detector active’
voltage: 6V
Switch-on surge current at 24V:
120µA
Environmental performance
Orbis optical detectors operate over a broad range of
voltages at extremes of temperature. Thus the operating
voltage is 8.5V to 33V at –40° to +70°C, a unique
achievement for a conventional smoke detector.
Average quiescent current at
24V:
65µA
Alarm current:
At 12 volts
At 24 volts
20mA
40mA
Holding voltage:
5–33V
Minimum holding current:
8mA
Minimum voltage to light
alarm LED:
5V
Alarm reset time:
1 second
7
Material:
Detector and base moulded in
white polycarbonate.
Alarm Indicator:
Integral indicator with 360°
visibility (See Table 1 for
details of flash rate)
Dimensions and weight of
detector in base:
100mm diameter x 50mm
height, 135g
Environmental:
Operating and storage
temperature
–40°C to +70°C
(no condensation or icing)
Humidity:
0% to 98% relative humidity
(no condensation)
Wind speed:
Unaffected by wind
Atmospheric pressure:
Insensitive to pressure
Alarm load:
600Ω
Alarm reset voltage:
<1V
MECHANICAL
Dimensions and weight of
detector:
100mm diameter x 42mm
height, 75g
Supply voltage:
8.5—33V DC
The stability of the detector–high reliability, low false
alarm rate–is further increased by the use of algorithms
to decide when the detector should change to the
alarm state. This removes the likelihood of a detector
producing an alarm as a result of smoke from smoking
materials or from another non-fire source.
Remote output (–R)
characteristic:
1.2kΩ connected to negative
supply
IP rating to EN 60529: 1992*:
23D
Electromagnetic Compatibility:
The detector meets the
requirements of BS EN 50 081-1
for emissions and BS EN50 130-4
for susceptibility.
marked
*The IP rating is not a
requirement of EN 54 since
smoke detectors have to be
open in order to function.
An IP rating is therefore not
as significant as with other
electrical products.
Where to use multisensor
smoke detectors
Multisensor smoke detectors are recognised as good
detectors for general use but are additionally more
sensitive to fast burning, flaming fires–including liquid
fires–than optical detectors.
They can be readily used instead of optical smoke
detectors but should be used as the detector of choice
for areas where the fire risk is likely to include heat at
an early stage in the development of the fire.
As with Orbis optical smoke detectors the increased
reliability of detection is combined with high immunity
to false alarms.
multisensor smoke detector
orbis multisensor smoke detector
The multisensor smoke detector is a thermally
enhanced smoke detector and as such will not give an
alarm from heat alone. It is a development of the Orbis
optical detector described in the previous chapter and
goes further in its capabilities of fire detection.
How does the orbis
multisensor detector work?
The optical sensor is identical to the one in the Orbis
optical detector. Its sensitivity is, however, influenced
by a heat sensing element which makes the detector
more responsive to fast-burning, flaming fires.
It should be noted that the detector is a smoke detector.
Although Orbis multsensor relies on both smoke and
heat sensors it is not possible to switch from smoke
detection to heat detection.
Environmental performance
The environmental performance of the multisensor
detector is the same as that of the Orbis optical smoke
detector.
8
technical data
All data is supplied subject to change without notice.
Specifications are given at 23°C and 50% relative humidity
unless otherwise stated.
DETECTOR & OPERATING
PRINCIPLES
Principle of detection:
Photo-electric detection of light
scattered by smoke particles
over a wide range of angles.
The optical arrangement
comprises an infra-red emitter
with a prism and a photo-diode
at 90° to the light beam with a
wide field of view. The detector’s
microprocessor uses algorithms
to process the sensor readings.
Heat sensing element which
increases the sensitivity of the
detector as the temperature
rises.
Sampling frequency:
Once every 4 seconds
Supply voltage:
8.5—33V DC
Supply wiring:
2 wires, polarity sensitive
Maximum polarity reversal:
200ms
Power-up time:
<20 seconds
Minimum ‘detector active’
voltage: 6V
Switch-on surge current at 24V:
120µA
Average quiescent current at
24V:
65µA
20mA
40mA
Remote output (–R)
characteristic:
1.2kΩ connected to negative
supply
MECHANICAL
Material:
Detector and base moulded in
white polycarbonate.
Dimensions and weight of
detector:
100mm diameter x 50mm
height, 80g
Dimensions and weight of
detector in base:
100mm diameter x 60mm
height, 140g
Environmental:
Operating and storage
temperature
–40°C to +70°C
(no condensation or icing)
Humidity:
0% to 98% relative humidity
(no condensation)
Wind speed:
Unaffected by wind
Atmospheric pressure:
Insensitive to pressure
Alarm load:
600Ω
IP rating to EN 60529: 1992*:
23D
Holding voltage:
5–33V
Electromagnetic Compatibility:
The detector meets the
requirements of BS EN 50 081-1
for emissions and BS EN50 130-4
for susceptibility.
marked
Minimum holding current:
8mA
Minimum voltage to light
alarm LED:
5V
Alarm reset voltage:
<1V
9
Maximum polarity reversal:
200ms
Alarm Indicator:
Integral indicator with 360°
visibility (See Table 1)
ELECTRICAL
Alarm current:
At 12 volts
At 24 volts
Alarm reset time:
1 second
*The IP rating is not a
requirement of EN 54 since
smoke detectors have to be
open in order to function.
An IP rating is therefore not
as significant as with other
electrical products.
Where to use heat detectors
Heat detectors are used in applications where smoke
detectors are unsuitable. Smoke detectors are used
wherever possible since smoke detection provides
earlier warning of fire than heat detection. There are,
however, limits to the application of smoke detectors
and these are described in the section ‘Choosing a
detector’ on page 4.
Heat detectors should be used if there is a danger of
nuisance alarms from smoke detectors.
orbis heat detector
The Orbis range incorporates six heat detector classes
to suit a wide variety of operating conditions in which
smoke detectors are unsuitable.
heat detector
The European standard EN54-5:2000 classifies heat
detectors according to the highest ambient temperature
in which they can safely be used without risk of false
alarm. The classes are identified by the letters A to G.
(Class A is subdivided into A1 and A2.) In addition to
the basic classification, detectors may be identified by
a suffix to show that they are rate-of-rise (suffix R) or
fixed temperature (suffix S) types.
All heat detectors in the Orbis range are tested as static
or rate-of-rise detectors and are classified as A1R,
A2S, BR, BS, CR and CS.
Choosing the correct class of
heat detector
Heat detectors have a wide range of response
characteristics and the choice of the right type for a
particular application may not always seem straightforward. It is helpful to understand the way that heat
detectors are classified as explained earlier and to
memorise a simple rule: use the most sensitive heat
detector available consistent with avoiding false alarms.
© Apollo Fire Detectors Limited 2004/JDR
Fig.3
Choosing a heat detector
In the case of heat detectors it may be necessary to
take an heuristic approach, ie, trial and error, until the
best solution for a particular site has been found. The
flowchart (Fig. 3) will assist in choosing the right class
of heat detector.
10
technical data
All data is supplied subject to change without notice.
Specifications are given at 23°C and 50% relative humidity
unless otherwise stated.
If the fire detection system is being designed to comply
with BS 5839–1: 2002 heat detectors should be
installed at heights of less than 12 metres with the
exception of class A1 detectors, which can be
installed at heights up to 13.5 metres.
DETECTION OPERATING
PRINCIPLES
MECHANICAL
Principle of detection:
Measurement of heat by means
of a thermistor.
Material:
Detector and base moulded in
white polycarbonate.
Sampling frequency:
Once every 4 seconds
Alarm Indicator:
Integral indicator with 360°
visibility (See Table 1 for
details of flash rate)
ELECTRICAL
How do orbis heat detectors
work?
Orbis heat detectors have an open-web casing which
allows air to flow freely across a thermistor which
measures the air temperature every 2 seconds. A
microprocessor stores the temperatures and compares
them with pre-set values to determine whether a fixed
upper limit–the alarm level–has been reached.
In the case of rate-of-rise detectors the microprocessor
uses algorithms to determine how fast the temperature
is increasing.
Static heat detectors respond only when a fixed
temperature has been reached. Rate-of-rise detectors
also have a fixed upper limit but they also measure the
rate of increase in temperature. A fire might thus be
detected at an earlier stage than with a static detector
so that a rate-of-rise detector is to be preferred to a
static heat detector unless sharp increases of heat are
part of the normal environment in the area protected
by the heat detector.
Environmental performance
The environmental performance is similar to that of
the Orbis optical smoke detector but it should be
noted that heat detectors are designed to work at
particular ambient temperatures (see Fig 3).
Supply voltage:
8.5—33V DC
Supply wiring:
2 wires, polarity sensitive
Maximum polarity reversal:
200ms
Power-up time:
<20 seconds
Minimum ‘detector active’
voltage: 6V
Switch-on surge current at 24V:
120µA
Average quiescent current at
24V:
65µA
Alarm current:
At 12 volts
At 24 volts
20mA
40mA
Dimensions and weight of
detector in base:
100mm diameter x 50mm
height, 130g
Environmental:
Operating and storage
temperature
–40°C to +70°C
(no condensation or icing)
Humidity:
0% to 98% relative humidity
(no condensation)
Wind speed:
Unaffected by wind
Atmospheric pressure:
Insensitive to pressure
Alarm load:
600Ω
IP rating to EN 60529: 1992*:
23D
Holding voltage:
5–33V
Electromagnetic Compatibility:
The detector meets the
requirements of BS EN 50 081-1
for emissions and BS EN50 130-4
for susceptibility.
marked
Minimum holding current:
8mA
Minimum voltage to light
alarm LED:
5V
Alarm reset voltage:
<1V
Alarm reset time:
1 second
Remote output (–R)
characteristic:
1.2kΩ connected to negative
supply
11
Dimensions and weight of
detector:
100mm diameter x 42mm
height, 70g
*The IP rating is not a
requirement of EN 54 since
heat detectors have to be open
in order to function. An IP
rating is therefore not as
significant as with other
electrical products
installing orbis
Orbis has been designed to make installation fast and
simple. Fig 4 shows the TimeSaver mounting base as
it is seen from the installer’s point of view.
The E-Z fit fixing holes are shaped to allow a simple
three-step mounting procedure:
• Fit two screws to the mounting box or surface
• Place the Orbis base over the screws and slide
home
• Tighten the screws
The base offers two fixing centres at 51 and 60mm.
A guide on the base interior indicates the length of
cable to be stripped. Five terminals are provided for
the cables, four being grouped together for ease of
termination.
TimeSaver Base®
The terminals are:
•
•
•
•
•
positive IN
positive OUT
negative IN and OUT (common terminal)
remote LED negative connection
functional earth (screen)
The terminal screws are captive screws and will not
fall out of the terminals. The base is supplied with the
screws unscrewed in order to avoid unnecessary work
for the installer.
The end-of-line resistor or active device should be
connected between the OUT+ and COM– terminals.
If it is required that all detectors be fitted with their LEDs
facing the same direction the bases must be fitted to the
ceiling observing the marking on the exterior which
indicates the position of the LED.
The bases may be connected as shown in Fig 5 where
remote LEDs, if required, are connected to the associated
base.
Fig 6 shows how to connect one remote LED to more
than one base so that an alarm in any of the detectors
connected will switch the remote LED.
In many installations
bases with diodes are
specified in order that
an active end-of-line
device may be fitted.
Diode bases are
marked ‘OD’.
12
© Apollo Fire Detectors Limited 2004/JDR
© Apollo Fire Detectors Limited 2004/JDR
Snip along marked lines and
remove this part to lock the
detector to the base
Terminal 4, Screen
(Functional Earth)
+
fitting orbis detector heads
U
LE
T
When the bases have been installed and the system
wiring tested, the detector circuits can be populated.
D
O
OUT +
—
LED —
COM —
IN +
Two methods are suggested:
IN +
IN & OUT —
Direction of LED indicated by
mark on outside of moulding
COM
D
—
IN
COM
+
—
—
IN
COM
+
—
D
IN
+
LE
T
T
T
+
+
+
4
4
1
1
1
2
Screen
(Functional
Earth)
—
—
D
LE
OU
LE
OU
From
control
panel
TimeSaverBase®
2
3
4
Fig.4
© Apollo Fire Detectors Limited 2004/JDR
OU
1. Apply power and fit the detectors one by one,
starting at the base nearest the panel and working
towards the end of the circuit. As each detector is
powered up it will enter ‘StartUp’ and flash red (see
next page for a full description of this feature). If
the LED does not flash, check the wiring polarity
on the base and ensure there is power across IN+
and COM–. If the LED is flashing yellow the detector
is not operating correctly and may require maintenance
or replacing (see DirtAlert and SensAlert® below
and the section ‘Maintenance and servicing’ on
page 15).
3
2
3
© Apollo Fire Detectors Limited 2004/JDR
—
IN
COM
+
—
D
—
IN
D
+
4
2
3
2
Feature
Description of Feature
Red LED Status
Yellow LED Status
StartUp
Confirms that the detectors are wired in the
correct polarity
Flashes
once per second
No Flash
FasTest®
Maintenance procedure, takes just 4 seconds to functionally
test and confirm detectors are functioning correctly
Flashes
once per second
No Flash
DirtAlert™
Shows that the drift compensation
limit has been reached
No Flash
Flashes once per second in
StartUp (Stops flashing
when StartUp finishes)
SensAlert®
Indicates that the sensor is not
operating correctly
No Flash
Flashes every 4 seconds
(Flashes once per second in
StartUp)
Normal Operation
At the end of StartUp and FasTest
(without flashing LED as standard)
No Flash
No Flash
Flashing LED
Version
Detector’s red LED flashes in normal
operation (at the end of FasTest)
Flashes every
4 seconds
No Flash
13
3
© Apollo Fire Detectors Limited 2004/JDR
3 bases wired with a common LED
orbis features: LED status
Table 1
+
1
3
IN
+
Fig.6
2
—
—
LE
T
OU
T
OU
1
1
Screen
(Functional
Earth)
COM
+
—
LE
4
COM
D
LE
+
From
control
panel
Base wiring diagram
4
Fig.5
T
OU
2. Fit all detectors to the circuit, apply power and
check detectors by observing the LED status of each
device. The StartUp feature lasts for 4 minutes so it
may be necessary to reset or de-power the circuit to
allow all detectors to be observed. The LED status is
the same as method 1.
Commmissioning
made easy
Relay Base
The relay base incorporates a single-pole voltage-free
changeover contact for switching ancillary equipment.
The maximum contact rating is 30V 1A.
Orbis has been designed with a number of features that
make commissioning easier and that save time.
StartUp
When Orbis detectors are powered up they automatically
enter a phase known as StartUp and in which they stay
for 4 minutes. After this they revert to normal operation.
If the detector is reset, ie, if power is disconnected for
one second or longer, the detector will always enter
StartUp for the first four minutes after power has been
restored. The detector LED flashes red once a second to
indicate that it is in StartUp.
When the detector changes to the alarm state, the
relay is energised, causing the contact to change state.
The contact will remain in this condition until the
detector is reset.
COM
—
IN
COM
+
—
—
IN
+
—
D
T
T
OU
LE
OU
D
LE
2
3
2
N/C N/O
RELAY
CONTROLLED
DEVICE
What StartUp indicates
StartUp is used to check that the positive and negative
cables are connected in the correct polarity and that
power has been applied to the detector. If this is the
case, the LED will flash red once a second.
3
Screen
(Functional
Earth)
COM —
To next
detector
4
4
1
1
+
From
control
panel
+
+
_
Screen
(Functional
Earth)
COM —
StartUp will not check whether the IN+ and OUT+
connections have been transposed. This is not a problem
if standard bases are used as the detector will operate
normally.
N/C N/O
RELAY
CONTROLLED
DEVICE
© Apollo Fire Detectors Limited 2004/JDR
Fig.7
If, however, diode bases are used and a detector is
removed from a base with transposed positive
connections none of the detectors beyond this point
will operate.
TimeSaver relay base wiring connections
FasTest ®
Orbis detectors incorporate a test facility known as
FasTest®.
In normal operation Orbis smoke detectors do not
change to the alarm state at the first sensing of smoke.
If they did, they could be too sensitive and cause false
alarms. Algorithms determine the point at which the
detector changes to alarm.
This could slow down routine maintenance during
which detectors are tested by means of smoke or a
smoke-simulating substance.
In order to avoid such a problem Orbis detectors have
FasTest, a facility which is automatically available during
StartUp and which modifies algorithms so that testing is
possible within 4 seconds.
14
The problem of testing is even more acute in the case of
heat detectors as they absorb a great deal of heat during
testing. Orbis heat detectors also incorporate FasTest®.
In the case of heat detectors a fast test is defined as a
sample which recognises a rise of 10°C within one
minute. Since sampling takes place every 2 seconds an
Orbis heat detector will respond within about 4
seconds.
Smoke or Heat Testing
Smoke or heat testing Orbis detectors is aided by the
FasTest® feature. A detector will react rapidly to the correct
stimulus if applied within 4 minutes after power up.
Choose the appropriate test function on the control
panel and reset the detector circuit. This should place
the detectors into FasTest®. Apply smoke or heat as
appropriate and the detector should enter the alarm
state within 4 seconds. The panel may sound the alarm
and reset the zone automatically (refer to control panel’s
instructions). If not, silence the alarm and reset the
panel. Repeat the procedure as necessary.
Note that the multisensor detector will respond to either
smoke or heat while in FasTest®. It will not respond to
heat only in normal operating mode.
maintenance and
servicing
Detectors should be checked regularly at the intervals
indicated by the locally applicable code of practice.
Apollo recommends that detectors be checked at least
once a year.
One of the features of Orbis is FasTest® which makes it
possible to carry out a functional test, using smoke or
heat, within about four seconds. See page 14 for details.
If detectors appear not to be functioning correctly they
should be returned to Apollo for testing.
If detectors are externally dirty they can be cleaned
carefully with a damp cloth using a small amount of
industrial alcohol.
DirtAlert™
Orbis detectors have drift compensation to compensate
for changes caused by the environment. The most usual
change is contamination.
If the detector is dirty to the point where it can no
longer compensate, its LED will flash yellow while it
is in StartUp. Maintenance checks should therefore
include removing a detector from its base and
re-inserting it or pressing reset on the panel to initate
StartUp.
A flashing yellow LED is not a sign that the detector
needs to be replaced immediately. The decision to
replace should be taken by the service engineer, taking
the environment of the detector into account. If the
detector is not replaced it will evenually cause false
alarms.
When deciding how long to leave the detector on site in
such a case, the following rule of thumb may be used:
installation time + 25%
For example, if a detector had been installed for four
years when the LED flashed yellow, it could be left in
place for up to 12 months.
Dirty detectors can be returned to Apollo for cleaning and
recalibration
15
PP2147/2004/Issue 1
© Apollo Fire Detectors Ltd 2003 - 2004
Assessed to ISO 9001: 2000
Certificate number 010
36 Brookside Road, Havant, Hampshire PO9 1JR, England. Tel: +44 (0)23 9249 2412. Fax: +44 (0)23 9249 2754.
Email: sales@apollo-fire.co.uk Website: www.apollo-fire.co.uk
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