Velocity VDOT-ASD-100 User manual

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VDOT-ASD-100
Aspirating Smoke Detector
User’s Manual

VDOT-ASD-100 Aspiration Detector Velocity Detection
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VDOT-ASD-100 Aspirating Smoke Detector User’s Manual V1
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Content&
Introduction*.................................................................................................................................*3*
Features*.........................................................................................................................................*3*
Specification*.................................................................................................................................*5*
Sampling*Pipework*Design*.....................................................................................................*8*
Considerations+............................................................................................................................................................+8+
Design+Guidelines+...................................................................................................................................................+11+
Installation*.................................................................................................................................*14*
Mechanical+Installation+........................................................................................................................................+14+
Electrical+Installation+............................................................................................................................................+16+
Front*Panel*.................................................................................................................................*21*
Control+.........................................................................................................................................................................+22+
Display+.........................................................................................................................................................................+22+
Parameter+Setup+......................................................................................................................................................+27+
Parameter*Functions*...............................................................................................................*29*
Commissioning*..........................................................................................................................*33*
Commissioning+Check+List+..................................................................................................................................+33+
Maintenance*...............................................................................................................................*35*

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Introduction*
VDOT-ASD-100 is aspirating smoke detectors
especially developed for small area very early
warning fire detection.
Most early warning fire detection products
were seeking very high sensitivity smoke
detection to protect a large area; while VDOT-
ASD-100 is aiming at protecting proper size of
area. In fact, because of the nature of the
aspirating smoke detection, the bigger the
detection area is the less sensitive the system
becomes. In order to provide very early
warning fire detection in a large area
application, the alarm threshold of the
detector must be set to very sensitive and is
closed to environment background smoke
level. This makes the system very easy to have
unwanted or false alarms.
The prefer detection zone size of VDOT-ASD-100 is only about one quarter to one half of that
of the popular product on market (typically 2000sqm); while it provides much better
performance of very early fire detection and better ability immune to false/unwanted
alarms.
Features*
VDOT-ASD-100 uses high power, short wavelength blue LED as the detection light source. It
is very sensitivity to small smoke particles generated during the incipient stage of a fire, at
which time remaining invisible to human eyes. The highest alarm sensitivity of ASD high
sensitivity smoke detector is 0.005%/m, which is 1000 times more sensitive than a
conventional point type smoke detector.
l Alarm&Sensitivity&Range:&0.005~20%/m&
l Four&Alarm&Levels&

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l Up&to&100m&Single&Pipe&Length*&(18&Sampling&Holes&Along&the&Pipe)&
l Up&to&25&Sampling&Holes*&(60m&Sampling&Pipe&Length)&
l 7&Relay&Outputs&
l 3&in&1&Control/Display/Programmer&Front&Panel&
l RS485&Network&
l Support&Modbus&RTU&Open&Protocol&
&
*Note: Maximum pipe length and maximum number of sampling holes cannot be achieved
at the same time. When maximum pipe length is the major design consideration, the
number of sampling holes must be reduced. On the other hand, when maximum number of
sampling holes is the major design consideration, the pipe length must be reduced.
*

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Specification*
Smoke Detection Principle
- Forward Light Scattering Mass Detection
Smoke Sensitivity
- Smoke Detection Range: 0.001~25%/m
- Alarm Sensitivity Range: 0.005~20%/m
Sampling Pipe
- Material: ABS/UPVC
- OD: 25mm
Maximum Pipe Length
- EN54-20 Class A: Maximum 40 holes totally
" Single Pipe
ü 100m (18 holes)
ü 60m (25 holes)
" Two Branch Pipes
ü 2x80m (2x15 holes)
" Four Branch Pipes
ü 4x 60m (4x10 Holes)
- EN54-20 Class B: Maximum 60 holes totally
" Two Branch Pipes
ü 2x60m (2x25 holes)
" Four Branch Pipes
ü 4x 60m (4x15 holes)
*Note ： Please refer to Velocity ASD Design manual for the relationship between pipe
length and the number of sampling holes.
The ASDFlow air sampling pipe network design tool can be used to calculate the
maximum transport time and sampling hole sensitivity.
&
Important Note:
Operation of the Detector beyond 12%/m obscuration is not allowed per the
National Fire Alarm Code (NFPA 72) guidelines.

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VDOT-ASD-100 Aspirating Smoke Detector User’s Manual V1
Alarm Levels and Time Delay
- Alert (0~60 sec.)
- Action (0~60 sec.)
- Fire-1 (0~60 sec.)
- Fire-2 (0~60 sec.)
Environment Smoke Learning
- 24hours, 365days Non-Stop Smoke Background Level Learning
Flow Detection
- Detection Principle: Heat Mass Detection
- Pipe Flow Normalize to 100%
- Flow High and Flow Low Fault
- Adjustable Flow Detection Sensitivity
- Adjustable Flow Fault Threshold
Relay Output
- 7 Relays on Termination Board (Configurable)
- Rating: 2A@30 VDC
General Purpose Inputs
- 4xGPIs (Configurable)
- GPI Functions: RESET/ISOLATE/SILENCE/TEST/MAINS FAULT/BATT. FAULT/POWER
FAULT/SENSITIVITY MODE 1/SENSITIVITY MODE 2/SCAN/UDI-1/UDI-2/UDI-4/UDI-5
*Note: UDI, User Defined Input
Communication
- RS-485 Network
- Maximum number of devices on Network: 250
- Built in repeater
- Maximum cable length between two adjacent devices: 1.2km
- Support Modbus RTU open protocol
Control
- <Reset>, <Isolate>, <Silence> & <Test> buttons
Display

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VDOT-ASD-100 Aspirating Smoke Detector User’s Manual V1
- 20 segment smoke level bargraph
- 6-digits Numerical LEDs Display
" Real Time Smoke Level
" Real Time Airflow Level
" Device Address
" Active Event & Codes
- 4 Fire Alarm Indicators
" Alert, Action, Fire 1, Fire 2
- 4 Fault Indicators
" Detector, Airflow, System, Auxiliary
- Isolated indicator
- Beeper
Programmer
" Access Password Controlled
" Bargraph and 6-digits 7-Numerical LEDs display the function.
" <Func.> <ï><ð> <+> <-> <↵> buttons to change settings.
Event Logs
- Number of Events: 25000
- Event Type: Alarm/Fault/Operation/Smoke/Flow/Auxiliary Gas Sensors
Operating Conditions
- Ambient Temperature: 0~40 ℃
- Sampling Air Temperature: -20~60 ℃
- Humidity: 10~95% RH Non-Condensing
Power
- 24 ±4.8 Vdc
- 175～320mA (Aspirators setting from 1 to 10）
Dimension
- Length=216mm
- Width=201mm
- Height=92mm
Weight
- Net Weight：2.5kg

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*
Sampling*Pipework*Design*
Aspirating system design is inherently simple. It is often possible to achieve good system
performance with very simple installations. There are however a few rules, which must be
adhered to, and these rules are equally applicable to all aspirating systems. The information
contained in this manual is intended as an overview only. For further information please see
the complete Velocity ASD Design Manual.
Considerations
o Primary'Detection'Sampling'Systems'
Are usually arranged to monitor the flow of air movement by the use of pipework and air
sampling points mounted directly in the airflow. This type of system is usually regarded as
supplementary to other forms of detection due to its limited response capability once the
air movement ceases.
In such a system when monitoring a single point of supply or extract, its system sensitivity
may be directly related as equal to the sensitivity of the central detector due to the
cumulative effect. In the case of a system monitoring more than one point of supply /
extract then the system sensitivity will only be determined in discussions with the
manufacturer or his representative.
Always locate the sampling points in a position to which smoke may reasonably be expected
to travel. This may sound obvious, but, for example, do not expect ceiling mounted sampling
points to operate satisfactorily if air flow prevents the cool smoke from an incipient fire from
reaching ceiling level. In this instance it is usually better to locate the sampling pipes directly
in the airflow (for example in an air conditioning unit air intake). There is no substitute for
carrying out smoke tests prior to installation of pipes to indicate suitable sampling point
location.
o Secondary'Detection'Sampling'Systems'
Are arranged such that the air sampling points are sited and spaced as if they are point type
smoke detectors. They can be positioned to satisfy NFPA 72, NFPA 76, BS 5839-1, BS 6266

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and local fire code requirements when the calculated relative sensitivity per air sampling
hole equates to a point detector. See Relative Sensitivity below.
o Maximum'Permissible'Transport'Time'
The time taken for a system to transport a sample from a protected area should not exceed
120 seconds (2 minutes). Transport times in excess of this must be the subject of a variation.
Shorter maximum transport times may be desirable in certain applications and should be
specified as part of the risk assessment. For example, Class A ASD systems are generally
designed with transport times of less than 60 seconds.
Maximum transport time can be directly affected by the installed sample pipe design, see
the following Figures. The 4-branch design will provide the shortest transport time.
Single branch system

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Two branch system
Four branch system

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o Balance'
Balance is generally expressed as a percentage. If all the sample points have the same
amount of air entering each sample hole then this is invariably described as a system with
100% balance.
o Relative'sensitivity'
The relative sensitivity of each air-sampling hole (assuming that all sampling points have
been calculated for an equivalent sensitivity i.e. 100% balance) can be calculated as a simple
function of the detector sensitivity and the number of sample points. For example, a 0.1%
high sensitivity detection device connected to pipe-work containing 40 equivalent air
sampling points can be regarded as a 4%/m system which can be considered as a Class C
sensitivity system. Unless otherwise stated in a approval documentation a figure of better
than 5%/m sensitivity per hole may be applied.
Design Guidelines
l The ideal diameter of sampling pipes is OD: 25mm / ID: 21mm. Other sizes will often
work but will provide different response times.
l Maximum pipework limitation
The limitation of each pipe inlet of VDOT-ASD-100 when the aspirator speed set to 10 is
100m pipe length with up to 18 holes alone the pipe (maximum pipe length) or 60m
pipe length with up to 25 holes along the pipe (maximum holes) under the requirement
of 120s maximum transport time.
- It is not possible to maximize the pipe length and the number of sampling points
at the same time. To maximize the pipe length, the number of sampling holes
must be reduced. On the other hand, to maximize the number of the sampling
holes on the pipe, the pipe length must be reduced.
l Ideally, if the total length of sampling pipe is greater than 50 meters, then branch pipes
should be used. When using branched sampling pipes, care should be taken to achieve
a reasonable degree of balance (say within 10% of airflow) to ensure even suction from
the pipes.
l Sampling pipes must have capped ends. The end cap should be drilled with a sampling
hole normally between 4 or 6mm diameter and free from burrs.
l Sampling holes should normally be 2-4mm diameter or as calculated by ASDFlow and
free from burrs.

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l This guide holds true for average sampling pipe lengths, but if using long pipes (typically
more than 60 meters total), performance may be improved by making the sampling
holes near the ends slightly larger than those nearer the detector.
l Although by no means essential, it must be recommended that if in doubt, ASDFlow be
used to ensure that transit times, balance of suction and individual sampling point
sensitivity are within desired limits.
l System Sensitivity: The recommended maximum number of sampling holes on the
pipework to achieve desired relative sampling hole sensitivity is as follows
- Class A: 40 holes
- Class B: 60 holes
l In Consideration of both maximum pipework and system sensitivity, the
recommendation of pipe length and number of holes to achieve different sensitivity of
VDOT-ASD-100 are
- EN54-20 Class A: Maximum 40 holes totally
" Single Pipe
ü 100m (18 holes)
ü 60m (25 holes)
" Two Branch Pipes
ü 2x80m (2x15 holes)
" Four Branch Pipes
ü 4x 60m (4x10 Holes)
- EN54-20 Class B: Maximum 60 holes totally
" Two Branch Pipes
ü 2x60m (2x25 holes)
" Four Branch Pipes
ü 4x 60m (4x15 holes)
Typical sampling hole size = 2mm
Typical End Cap size = 4~8mm
Single Pipe

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Typical VDOT-ASD-100 Pipework Configurations
*
Two-Branch Pipe
Four-Branch Pipe

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Installation*
Note: It is recommended that the installation is carried out by suitably experienced and
trained personnel.
Mechanical Installation
Dimensions
l The mounting holes in each corner are used to mount the device on the wall. It is
recommended the device is 1.5m above the floor. The device location should be
considered for easy access and suitable for the temperature and humidity
operating condition mentioned in the specification.

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l Ensure that when the detector is fitted to the wall there is enough space on the
right-hand side to allow the opening of the front panel.
Cable entries are also provided on the side and bottom. It should be noticed that some
cable entries are non-cut through holes, a punch using a screwdriver and hammer or a
proper tool are needed to open the entry holes.
Sampling&pipes&
Sampling pipes should be made from a non-hazardous material and should be clearly
identified. Typical sampling pipes used in air sampling systems are ABS/uPVC pipes with
25mm OD. The pipes should be marked with air sampling or aspirating smoke detection pipe
to identify its usage. Red pipe is recommended for it is a fire alarm system.
In some cases, high temperature or corrosion is a concern, metal or other materials suitable
materials for that environment can be used.
When drilling holes in the sample pipes, or cutting off lengths of pipe, ensure that all swarf
and debris is removed from the pipe.

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Electrical Installation
Above picture is the internal view of the VDOT-ASD-100. All the electrical connections should
be made to the removable connectors on the termination board or the relay board if it
equipped.
Cables&
Power cable should be 2.0mm2-2C of sufficient current carrying capacity.
Control cable should be 0.75mm2 strands cable.
RS485 network should be 24AWG twisted pair shielded cable.
High%Sensitivity%Smoke%Detector
Flow%Sensor
Aspirator
Termination%Board
Filter

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Terminal&Connections&
Termination Board
o Power'Supply'Connections'
Two 24Vdc power terminals on the termination board. One must be connected to a
24±20% (19.6~28.8) DC Power Supply. The device may be powered by any EN54-4
compliant monitored 24DC power supply of sufficient capacity.
&
Important Note:
The required 24Vdc primary power and 24 hour standby power for the Detector must be
obtained locally from a means suitable for NFPA 72 applications.

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o Relay'Connections'
There are 7 configurable relays on the termination board.
l Isolated (NO/NC)
l Fault (NO/NC)
l Alert (NO)
l Action (NO)
l Fire-1 (NO)
l Fire-2 (NO)
l Aux (NO)
Note: NO=Normally Open NC=Normally Closed Com=Common
The relay rating is 2A@30Vdc. If load connected is more than the relay rating, a transfer
relay suitable for the rating should be used.
Every relay has its indicator (LED) on board to indicate it’s on/off status. It’s easy for the
user to know the relay status and to trouble shoot if the connected device doesn’t go
out properly.
All relays are configurable to one of the following functions: Alert, Action, Fire 1, Fire 2,
Fault, Isolate, and Auxiliary. The relay output function printed on the termination board
is the factory default setting. Users can change the relay function using front panel
display or the Management computer Software to change the setting. However, the
second relay, which circuit is designed to normally closed to give a trouble signal when
the device is powered off. Care should be taken for the relay’s NO or NC connection
when changing relay functions.
o GPI,'General'Purpose'Input'
There are eight General Purpose Input terminals on VDOT-ASD-100 termination board.
Those inputs are designed to monitor the status of the connected devices. The connected
devices monitored by the GPI can be just a button, a fault relay from the power supply, or
even alarm relay from other detector. Short circuit the pair of the input pins makes ASD to
activate associated function defined in the GPI settings. There are 16 possible functions falls
in the following categories:

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l Device Control: Reset, Isolate, Silence, Test, Scan,
The GPI terminal can be connected to a remote button, a control/output module of the
fire alarm system, or a PLC so those control function can be performed remotely, or by
other systems.
l Power Fault Monitoring: Mains Fault, Battery Fault, Power Fault
It is sometimes required by local code that the fault status of the mains and/or battery
condition of the detector’s power supply should be monitored. In this case, the ASD
detection device will signal a fault when the connected relay of power supply is
activated. The ASD fault condition can then be monitored by a fire alarm system when
its fault relay is connected the fire alarm system input module.
l Sensitivity Change: Sensitivity Mode 1, Sensitivity Mode 2
In some applications, the detection area environment background smoke level is
different in a day. For example, in work hours the background smoke level is usually
higher than the non-working hours. Sometimes, outside pollutants go into the
detection area can generate false alarm. There are needs to decrease the sensitivity to
prevent the false alarm or increase the sensitivity to provide better protection in a daily
basis or in certain situations. In this case, the GPI can be connected to a button, a timer,
a PLC or even a relay output of other ASD detector sensing the pollutant level from
outside, so that that sensitivity adjustment can be made manually or locally.
l User Defined Device Monitoring: UDI-1, UDI-2, UDI-3, UDI-4, UDI-5
The UDI, User Defined Input is usually used to monitor the status (relay) of other detection
device, like gas sensors, temperature sensors, or other aspirating smoke detectors.
The GPI-1 on the VDOT-ASD-100 termination board is a monitored contact with a 10KΩ
terminal resistor connected at the factory. When the GPI-1 is used, the terminal resistor
needs to be moved to the end of the line. When the line connected to the GPI-1 is shorted,
the device reports a GPI-1 alarm; when the line connected to the GPI-1 is open, the device
reports a GPI-1 fault.
The GPI-2 on the VDOT-ASD-100 terminal board is an active input with monitoring contact,

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VDOT-ASD-100 Aspirating Smoke Detector User’s Manual V1
and is disabled by default. To enable the GPI-2, mount both the P1 and P2 jumper selection
to 2/3 PIN and set the corresponding GPI function. When the external active input is
disconnected for less than 3 seconds, the corresponding GPI-2 function is activated, and
when the GPI-2 connection line is disconnected or open for more than 6 seconds, the GPI-2
fault is reported.
'
o RS-485'
'
l Two RS-485 Terminals
l Built in RS-485 repeater, the cable length can be extended to next device for
another 1.2km.
l RS-485 Network can be configured in closed loop for better communication
reliability. The communication can switch direction to communicate with devices
behind the failure point when there’s device failure, line break or line short circuit.
l Computer Management System (a computer software) can monitor all devices on
network.
l SCADA/HMI/PLC systems capable of Modbus RTU open protocol can communicate
with ASD devices.
VDOT-NET64 Velocity Aspirating Network Configuration
D+
D-
S
D+
D-
S
D+
D-
S
D+
D-
S
偵測主機
D+
D-
S
D+
D-
S
D+
D-
S
D+
D-
S
偵測主機 偵測主機 偵測主機
D+
D-
S
D+
D-
S
D+
D-
S
D+
D-
S
偵測主機
D+
D-
S
D+
D-
S
D+
D-
S
D+
D-
S
偵測主機 偵測主機 偵測主機
AVA 通訊網路RS-485 連線架構
AVA 最大不超過250元件
24AWG-2P 單/雙隔離網接地線
ASD-Device
24AWG Twisted Paired
Screened Cable
Closed Loop Con
ASD-Device
ASD-Device
ASD-Device
ASD-Device
ASD-Device
ASD-Device
ASD-Device
Maximum 250 devices
on one network