MAN2901-3
Analogue Duct Sampling Unit Item Number: 214-0051
Installation guide
1
Description
The Ampac Duct Sampling Unit is designed to monitor
levels of smoke in air ducts operating in air speeds of
0.5 to 20 meters per second.
The Duct Smoke Detector installation kit consists of;
➢ Enclosure, cover, divider and seal.
➢ Sampling and exhaust pipes, red bung, mounting
template, screws and test probe.
Positioning the Duct Smoke Detector
To minimise the impact of air turbulence and
stratification on performance a duct smoke detector
should be located as far as possible downstream from
any obstruction (i.e., deflector plates, elbows, dampers,
etc). In all situations confirmation of airflow velocity and
pressure differential between pipes are within
specifications is required.
Operational Considerations
If installing the detector in the return side of the air
duct, locate it where it will not be diluted with outside
air.
If possible, install duct smoke detectors upstream of air
humidifiers and downstream of dehumidifiers.
To minimise false alarms avoid mounting the detector
in areas of extremes of temperatures, of high humidity
or those containing gases or high amounts of dust.
KNOCKOUTS TOP AND RIGHT HAND SIDE
SAMPLING PIPE
TRANSPARENT COVER
XP95 DETECTOR
ENCLOSURE
MOUNTING
HOLE
DIRECTION
OF AIR
FLOW IN
RELATION TO
INTAKE HOLES
Analogue Duct Sampling Unit
Nominal Sensitivity: 7%
Operating Voltage: 17-28VDC
Differential Pressure: 0.7Pa @1m/sec Duct Velocity
Approved to: AS1603-13
Item Number: 214-0051
Refer to Installation
Guide MAN2901
N1236
TO TEST: INSERT PROBE
ATTACHED TO SMOKE CAN HERE
- RELEASE SMOKE
Figure 1: Duct Sampling Unit
Installation
Observe anti-static precautions at all times
1. Locate the mounting template and follow the
instructions on the template.
2. Remove cover, determine how the cabling will be
bought into the enclosure and remove the
appropriate knockout/s.
3. If the sampling pipe is longer than 560mm it must
be supported on both sides of the duct. If
necessary cut the pipe so it protrudes slightly
through a hole cut at right angles to the pipe in the
opposite wall of the duct. The pipe must then be
closed of with the small red bung provided.
4. Insert the 2 pipes into the enclosure by pushing the
pipe up against the spring loaded clips and turning
it away from the clip whist ensuring to align the
sampling holes to the airflow and locate the tab on
the pipe in one of the indents.
5. Remove the template from the duct and mount the
enclosure to it using the 2 screws supplied.
6. Set the XPERT address, terminate the cabling,
ensure the FACP is appropriately programmed,
push down on the tamper switch and test. If the
tamper switch is not depressed a fault should be
indicated by the FACP. Replace the cover.
INLET PIPE HOLES
FACE AIRFLOW
INSERT RED BUNG EXHAUST PIPE INSTALLED DOWNSTREAM
OF AIRFLOW DO NOT INSTALL BUNG HERE
DUCT WIDTH AIRFLOW DIRECTION
90 DEG
DETECTOR
ENCLOSURE
SUPPORT HOLE FOR PIPES LONGER THAN 560mm
MOUNTING HOLE
MOUNTING HOLE
DIVIDER
Figure 2: Detector Duct Installation
ENCLOSURE
DIVIDER
DETECTOR
LED
SPRING LOADED
PIPE RETAINING
CLIP
SAMPLING
ENTRY PIPE
EXHAUST
PIPE
SPRING
LOADED PIPE
RETAINING
CLIP
CHAMBER
SEAL
ENCLOSURE
MOUNTING
HOLE
COVER MOUNTING HOLE
8
7
6
5
4
3
2
1
SW 1
B/W
GW
G
B
+
-
+
-
ANALOGUE / ADDRESSABLE
DETECTOR WIRING
- R
+ R
L2
L2
L1
L1
SCREEN
SCREEN
FACP
TAMPER SWITCH
REMOTE LED
Figure 3: Cutaway View of the Enclosure, Terminal Block & Wiring Diagram
MAN2901-3
Analogue Duct Sampling Unit Item Number: 214-0051
Installation guide
2
Sampling tubes
The duct smoke detector is designed to operate in
ducts with a width of between 300mm and 3 metres.
An inlet tube of 360mm, suitable for duct widths up to
560mm, is supplied as standard. This tube needs to be
attached only to the duct detector housing.
Longer inlet tubes for wider ducts may be ordered
separately:
Type
Item Number
150 to 750mm
214-0060
750—1500mm
214-0061
1500—3000mm
214-0062
Tubes in duct widths above 560mm should be long
enough to reach from one side of the duct to the other
and it may be necessary to use a tube that is too long
and cut it to slightly more than the duct width. Since
the tube needs to be supported on both sides a hole
should be cut in the opposite wall of the air duct to
allow the tube to protrude slightly and sealed of. The
tube must be closed with the small red bung provided.
The exhaust tube does not need to extend across the
duct and is therefore supplied at a fixed length
Before investigating individual units for faults, it is
important to check the system wiring is fault free. Earth
faults on data loops may cause communication errors.
Fault Finding
Problem
Possible Cause
Fault on control
panel
Incorrect wiring
Detector not fitted
Duct detector housing cover
incorrectly fitted
Incorrect address (XP95/Discovery
only)
Incorrect detector type
(XP95/Discovery only)
Constant alarm
Smoke present in duct
Contaminated detector
Detector does not
alarm under test
Sampling tubes fitted incorrectly
Detector baffle not fitted
Duct detector housing cover
incorrectly seated
Sampling tube (air in) incorrectly
sealed
Duct detector housing incorrectly
seated on duct
Compatible Fire Alarm Control Panel & Detector
FACP: FireFinder
Detector: XP95 - Item Number 201-0003
Base: – Item Number 201-0004
Note: Unit is approved to: AS1603-13
MAN2901-3
Analogue Duct Sampling Unit Item Number: 214-0051
Installation guide
3
XPERT Card Addressing
Select the desired address and remove the pips indicated in black. Remove pips with a small screwdriver.
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126: Expanded View
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