INSTALLATION AND MAINTENANCE … · Supply Current: 120 mA - 500 mA depending on fan speed ......

1 © System Sensor 2011 I56-2634-012ENPittway Tecnologica S.r.l, Via Caboto 19/3, 34147 Trieste, Italy

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INSTALLATION AND MAINTENANCE INSTRUCTIONSA300 SERIES ASPIRATED SMOKE DETECTOR

Important Note

Aspirating Smoke Detectors supplied and installed within theEU from June 2009 must conform to the EU ConstructionProducts Directive (89/106/EEC) and the related EuropeanStandard EN 54-20.

This unit has been tested and certified to ensure generalconformance to the above directive and standard, but strictadherence to this instruction guide is required to ensure thatthe installation meets these requirements in all respects.

The supplied labels must be completed by the installer wherenecessary and applied to the unit at the time of fitting the smokesensors. The labels contain the approved CPD CE mark as wellas stating the sensitivity of the detectors being fitted, and MUSTbe applied for the installation to be in full conformance.

Full details of the labeling requirements together with a table ofapproved detectors and required sensitivity information arefound in the appendicies.

SPECIFICATIONSNumber of Sensors: A310E:1 or 2 sensors. A320E: 2 sensors

(order separately, recommended: 7251 sensor).Internal Filtration: 2 stage dust particle filterFlow Monitoring: Thermal device, high and low thresholds.

10 element bar graph indication.Relay fault reporting

Relay Contact Ratings: 1 A @ 30VDCSupply Voltage: 24VDC (Nominal) 18-30VDC (12W min)Supply Current: 120 mA - 500 mA depending on fan speed

setting and supply voltage. Maximumcurrent 350mA @24VDC with no aspiratingpipe (See table 4 for typical currents/fanspeeds)

Maximum Pipe Length: 1 Chan - 100 metres2 Chan - 2 x 100 metresDependant on sensor type and application

IP rating: IP23 / IP65 optional with exhaust fitted

Operating Temperature: -10°C to 50°COperating Humidity: 10 to 95% RH (non-condensing)Fuse Type/Rating: ‘T’ European sub-miniature (TR5)

1.25 A Anti-surge

INTRODUCTION

There are many instances where aspirated smoke detectorsare specified, but where the very high sensitivity that is normallyinherent in these devices is an unnecessary expense. TheA300E Series Aspirated Smoke Detector provides the perfectsolution.

A300E Series aspirating smoke detectors are available insingle or dual channel formats giving a large monitored areausing sampling holes in the place of point detectors.

The A310E single channel unit has a single detection pipe, andmay be used with one smoke sensor, or two sensors which canbe configured for alarm coincidence at the panel to simulate a‘Double Knock’ type operation. (Note: Not included in VdSapproval).

The A320E unit is equipped with two detection pipe channelsand should be fitted with one sensor for each channel and canthus cover a greater area than the A310E.

A high performance aspirator and flow monitoring circuitensure a constant, monitored flow level which can be displayedon a 10 element bar graph with adjustments for high and lowflow thresholds.

The A300E Series units incorporate in-line air filters to removedust particles from the air samples.

A300E Series Aspirating smoke detectors provide closed loopsampling whereby the exhausted air can be completelyreturned to the sampled area making them particularly suitablefor prison cells.

A300E Series Aspirating smoke detectors use one or twostandard intelligent or conventional smoke sensors whichcommunicate their status directly with the control panel(Recommended: 7251 Laser Sensor). The A300E monitors itsown systems and uses relay contacts to signal system faults. Ifusing an intelligent fire system, these contacts should bemonitored using a separate monitor module to return the fault.

A300E Series smoke detectors are powered by an external24Vdc power supply.

With the use of an exhaust pipe, the system is IP65 rated,allowing its use in many harsh environments, and applicationswhere regular hosing is performed.

IMPORTANTIf your installation conforms to EN54-20, in order to becompliant it is necessary to add one of the over-labels(enclosed with the A300 unit) to the product label - asindicated in section 3.3 Over-Label Application.

0786

0786-CPD-20583

EN54-20 : 2006

Class A B & C

Aspirating Smoke Detectors

2D200-41-00 Pittway Tecnologica S.r.l, Via Caboto 19/3, 34147 Trieste, Italy

Pipe InstallationThis section provides a simple guide to pipe installation andshould contain all the information required for simpleinstallations based on standard configurations. More informationon achieving an EN54-20 compliant pipe installation can befound in Appendix 3: EN54-20 Certified Sensors.

Use appropriate pipe with sampling point holes drilled along itslength. The pipe run is terminated with an end cap that has ahole drilled in its centre.

The position of each individual sampling point should be inaccordance with the rules for the positioning of point sensors. Itis important to note that the concentration of smoke on anindividual sample point will be diluted by the clean air from theother sample points and the end cap hole.

Smoke tests should be performed before planning andinstalling the pipe network.

Pipe Specifications

For EN54-20 compliance, the pipe should be Red ABS to EN61386 (Crush 1, Impact 1, Temp 31) with a nominal outsidediameter of 25 mm or ¾” (internal diameter 21 mm). The samplepipe is normally supplied in 3 m lengths and is cut as requiredand joined by solvent welded sockets (permanent), or socketunions (removable).

The A300 inlet port is tapered to allow a push fit of the samplingpipe. The pipe should be cut squarely to ensure a good, airtightseal. Solvent adhesive should not be used for this joint.

Fixings

The means of fixing the pipe to the structure will depend on siteconditions. The normal methods are pipe clips, saddle clampsor even tie wraps. Fixing centres are typically 1.5m apart.

Holes

The sampling pipe is perforated with sampling holes at designspacing. These are typically 3mm and can either be pre-drilledor drilled in situ. Care should be taken to avoid swarf enteringthe pipe. It is always good practice to blow compressed airthrough the pipe after drilling to clear any debris before finalconnection to the equipment.

Figure 1: A300E Series Mounting Hole Centres

INSTALLATION

Note: This equipment must be installed by a qualified installerin accordance with all local and national regulations.

A300E Series InstallationThe front cover of the A300 will need to be removed to securethe unit permanently in place. This is done using the specialkey that is supplied, which fits into the screw hole in each cornerof the unit. Please keep the key in a safe place.

The A300E should be secured to a suitable surface through the4 corner fixing points as shown below using suitable fasteners,for example no.6 wood screws.

Figure 2: Capillary Tube Sample Holes

End Cap

The end of the pipe should be terminated with an end cap,having a central hole to control air flow. If the end cap is notused, then practically no air will be drawn through the sideholes. Without a hole in the end cap the contributions from theside holes will tend to be very unbalanced.

For pipes with only a few sampling holes, the end cap holeusually is the same size as the sampling holes along the pipe.When there are more than five sampling holes, the end caphole may be larger than the remaining sampling holes alongthe pipe. See Appendix 3: EN54-20 Certified Sensors forapproved configurations.

Bends

Bends are either 45 or 90 degrees. For the 90-degree bends itis very important that slow radii are used and not a sharp elbow,as this will introduce unacceptable pressure losses, andsignificantly increase the response times from holes beyondthe bend.

T Pieces

A T joint can be used on pipes to produce 2 branches. It isrecommended that the total number of holes in a resulting pipesystem is no more than the number of holes estimated for asingle pipe design. For example, if a single 100M pipe canhave up to 18 holes, 2 branches can have up to 9 holes each. Itis important that the branches have a balanced design - that is,they should be approximately equal in length and number/sizeof holes). For further information, please see the maximum pipelength/hole size data in Table 6 and the T Piece example shownlater in the manual.

Exhaust

In most installations the exhaust should be left open, but thereare some circumstances when it may be necessary to connecta pipe to the exhaust port to divert the exhaust away from thelocation of the unit; For example to reduce noise, reduce risk ofinterference/deliberate obstruction, improved environmentalprotection etc.

Pipe of the same specification as the sample runs should beused and its length limited to a maximum of 10m to avoidsignificant reduction in the airflow. Care should be taken toposition the new exhaust outlet where it cannot be accidentallyor deliberately blocked.

A320E Installation

Where the two pipe A320E unit is used, it is important that theair flow through the two pipes is balanced otherwise theresponses of the two sensors may be affected.

Figure 3: Pipe Accessories

45° AND 90° PIPE BENDS

END CAP

2 42 m m

167

mm

184

mm

25 9 m m

To A300ECeiling

In standard configuration, with pipe hanging from ceiling, theholes will be placed underneath, so the smoke can easily riseup into the hole. Capillary tubes can also be used with the holesas in figure 2.


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A300E SERIES WIRING

WarningBefore working on the system, notify the proper authoritiesthat the system is undergoing maintenance and will betemporarily out of service. Ensure that all power is removedbefore opening the A300E unit.

Note: All wiring must be in accordance with local requirements

The A300E connections are accessed by removing the unitcover using the supplied key, and then CAREFULLY lifting thefront display panel away from the A300E housing. The ribboncable that connects the front display PCB to the main PCB maybe unplugged if necessary.

The main PCB (See figure 4) includes wiring terminal blocks forconnecting the 24V power supply to the A300E unit, accessingthe fault relay contacts for each channel and the optional loopconnections.

Power ConnectionThe A300E unit is designed to run from a nominal 24VDCsupply. The supply should be connected to the 2 way connectoron the main circuit board ensuring that the wires are correctlyorientated. It is recommended that the wires should be aminimum size of 16 x 0.25mm (18AWG), or larger if the supply isfurther than 5m from the system.

A ferrite core is provided for EMC compliance. This should befitted to the supply wiring as shown below.

The current drawn is dependent on the fan speed – see Table 4for details.

LOOP OR ZONE CONNECTIONS FROM FIREDETECTION CONTROL PANEL

Figure 4: A300E SERIES Terminal Layout

ASPIRATING SYSTEMCHANNEL 2 FAULTCONTACTS (A320E DUALCHANNEL UNIT ONLY)

NOCOMNC

NOCOMNC

EXTERNAL POWER SUPPLYTO ASPIRATING SYSTEM

ASPIRATING SYSTEM CHANNEL 1 FAULTCONTACTS (BOTH A310E AND A320E)

+24VDC0VDC

FUSE

LOOP IN (+)LOOP IN (-)LOOP OUT (+)LOOP OUT (-)

Sensor ConnectionThe loop terminals are linked via a ribbon cable to the +/-terminals mounted on the front display PCB, which facilitateconnection to the sensor bases if required. The necessarybases (standard base B501 type for 7251 sensors) should bemounted on the front display panel using the M4 screwsprovided, with short wires connecting to the +/- terminals ifused.

Loop wiring connections are made to either the pluggableterminal blocks or directly to sensor bases, both of which willaccept wire sizes from 1mm² to 2.5mm². For best results,screened cable should be used. Refer to the control panelinstructions for cable type limitations.

Once wiring has been completed, the A300E unit should be re-assembled in reverse order.

IMPORTANT

The glands on the top of the unit that provide entry for thecabling must to be sealed to ensure that the only air enteringthe unit is coming in through the sample pipes. all wiringmust pass through the cable seals provided and noadditional holes should be made. In order to pass a cablethrough a seal it is necessary to make a small hole in the centreof the seal with a pointed implement (e.g. small screwdriver)and then force the cable through the hole into the box. The smallhole will expand to accommodate any cable diameter from 4 to10mm and then provide an airtight seal.

Figure WF: How to Fit the Ferrite

NOCOMNC

NOCOMNC


T1 (-)

T1 (-)

T2 (+)

T2 (+)

B501

B501

T1 (-)

T1 (-)

T2 (+)

T2 (+)

B501

B501

(Wiring when base #2not fitted)

WIRING CONFIGURATION

The A310E and A320E may be wired in several different configurations, dependant on the application and information required.Typical configurations are shown below.

For the single channel A310E, either one or two sensors can be used (to simulate “double knock” type applications).

For the A320E dual channel system, sensor 1 monitors channel 1, and sensor 2 monitors channel 2.

See relevant sensor and module manuals for correct wiring to the device or base.

LOOP (+) INLOOP (-) INLOOP (+) OUTLOOP (-) OUT

Sensor Arrangement 1.See figure 5. Two analogue addressable sensors are wired through the aspirating unit. Loop connections are made to the terminalblock on the A300E main PCB.

Note: This configuration can increase the loop impedance by up to one Ohm. If this is likely to cause a problem, use SensorArrangement 2 below.

MAIN PCBDISPLAY PCB

Sensor Arrangement 2.See Figure 6. The analogue sensors are connected directly to the fire control panel on the loop. The loop wiring is made directly to thesensor bases.

SENSOR #2

SENSOR #1

A300E ASPIRATING SYSTEM ENCLOSURE


MAIN PCBDISPLAYPCB

LOOP (+)LOOP (-)

LOOP (+)LOOP (-)

SENSOR#2

SENSOR#1

Figure 5: Wiring Configuration 1

Figure 6: Wiring Configuration 2


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T1 (-)

T1 (-)

T5 (+)

T5 (+)

B524IEFT-1

(Wiring when base #2not fitted)

T6 (+)

T6 (+)

T1 (-)

T1 (-)

T6 (+)

T5 (+)

T5 (+)

B524IEFT-1

T6 (+)

Using Isolator Bases

The A310E and A320E may be fitted with isolator bases (B524IEFT-1) if required. The basic configurations used on the previous pageare amended below.

Sensor Arrangement 1 with Isolator BasesSee figure 30. Analogue addressable sensors are wired through the aspirating unit. Loop connections are made to the terminal blockon the A300E main PCB.

Figure 30: Wiring Configuration 1 with Isolator Bases


DISPLAY PCB MAIN PCB

SENSOR#2

SENSOR#1

LOOP (+) INLOOP (-) INLOOP (+) OUT

LOOP (-) OUT

Sensor Arrangement 2 with Isolator Bases

See Figure 40. The analogue sensors are connected directly to the fire control panel on the loop. The loop wiring is made directly tothe sensor bases.

Figure 40: Wiring Configuration 2 with Isolator Bases


DISPLAY PCB MAIN PCB

SENSOR#2

SENSOR#1

LOOP (+)LOOP (-)

LOOP (+)

LOOP (-)


Fault Reporting

Fault monitoring of the A300E unit should be reported back to the panel using one of the suggested input module arrangements:

For the A310E, a single input M210E module can be used (see Figure 50).

For the A320E, a dual input M220E can be used if separate fault reporting for each channel is required (see Figure 50). Alternatively,an M210E module can be used if common fault reporting from both channels of the A320E is sufficient within the system (see Figure 60).

If the wiring and module must remain within the aspirating unit, an M503ME micro module can be used in place of the M210E.

47K R

47K R

47K

R

Figure 50: Suggested Wiring for A310E / A320E Using M210E / M220E Module


DISPLAYPCB

MAIN PCB

SENSOR #2

SENSOR #1

EXTERNAL PSU +24VEXTERNAL PSU 0V

M210E ORM220EINPUTMODULE

(A320E ANDM220E ONLY)

LOOP (+)LOOP (-)

LOOP (+)LOOP (-)

Figure 60: Suggested Wiring for A320E Using M210E Module (Common Fault Reporting)


MAIN PCBDISPLAYPCB EXTERNAL PSU +24V

EXTERNAL PSU 0V

SENSOR #2

SENSOR #1

LOOP (+)LOOP (-)

M210E INPUTMODULE

LOOP (+)LOOP (-)

Important Note

Ensure that the selected sensors have sufficient sensitivity for the application. See Appendix 1.3 for further details of how dilutionaffects sensor sensitivity.

If the installation is to be done in accordance with EN54-20, then the sensor must have been tested for use in the system. Please referto the list of approved detectors in Appendix 3: EN54-20 Certified sensors.


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OK HI LOOK HI LO

CODE 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9

OK HI LO

CODE 0 1 2 3 4 5 6 7 8 9

A310E ASPIRATING SYSTEM LAYOUT

Figure 7a: Display Functions A310E

POWER ON(IF FLASHING - VOLTAGE LOW)

GENERAL FAULT

AIRWAY INLET

NOT USED

NOT USED CODE ENTRY

AIRFLOW SPEEDBAR GRAPH

POSITION FORSECOND SENSORIF REQURIED

AIRFLOW INDICATOR:OK, HIGH. LOW

FAN FAULT

A320E ASPIRATING SYSTEM LAYOUT

Figure 7b: Display Functions - Dual Channel Version:

POWER, GENERAL FAULT, AND CODE ENTRY INDICATORS ARE COMMON TO BOTH CHANNELS.

UNLOCK

INSTALLSENSORHERE

INSTALL SECONDSENSOR HERE

AIRFLOW INDICATORS AND AIRFLOWSPEED BARGRAPH REFER TO THECHANNEL IN WHICH THEY ARE LOCATED.

AIRFLOW INDICATOR:OK, HIGH. LOW

UNLOCK

INSTALL FIRSTSENSOR HERE

GENERAL FAULT

NOT USED

NOT USED

POWER ON(IF FLASHING -VOLTAGE LOW)

AIRWAY INLETS

CODE ENTRY

FAN FAULT


ASPIRATING SYSTEM SET UP

Refer to figures 7a and 7b to identify LED indicators; figure 8shows the position of the buttons.

To enter the detector set-up mode, press and hold the<SELECT> and <CHANGE> keys simultaneously on the righthand side of the A300E housing until the Code Entry LED startsflashing.

Access Code

To access the set-up functions, an access code needs to beentered into the A300E.

To enter the code, press the <CHANGE> button repeatedly - theLEDs on the channel 2 (Right Side) Smoke Level / AirflowSpeed bar graph will illuminate in turn. Once the desirednumber LED is illuminated, press <SELECT>. Repeat for eachfigure in the code.

• The access code is 510

Warning: Ensure that this code is kept secure as itpermits access to the operation functions of the detector.

Once the third number has been entered, the unlock LED willilluminate, and will remain illuminated whilst the aspiratingsystem is in its set-up mode. The system will go straight into itsset up mode, starting from SET FAN SPEED.

At each stage, use the <CHANGE KEY> to select the desiredsetting. Once the correct value is set press the <SELECT> keymomentarily to accept the setting and step to the next function.Note that after the final step, momentarily pressing <SELECT>will wrap back to step one.

SELECT BUTTON

CHANGE BUTTON

Figure 8: User Functions

Table 1: A310E: Set-Up Procedure.

The current stage in the set-up is indicated by LED indicatorson the detector fascia as described in table 1.

To exit from setup at any point without calibrating the flow,press and hold the <SELECT> key. If no button is pressed forone minute, the detector will automatically exit the setup mode.

ASD

Step Mode Indication Function

1. Set Fan Speed “Power On” LED Flashes Sets aspirating system fan speed.

Press <CHANGE> to cycle through fan speed settings for 0 to 9 indicated on LED bar graphs. Fan speed will change as the settings cycle though.

Press <SELECT> once desired speed is selected to set speed and cycle to next mode

2. Set Bar Graph Sensitivity

“OK” LED Flashes Press <CHANGE> to set air flow sensitivity as indicated on bar graph.

Press <SELECT> once desired sensitivity is selected to accept and cycle to next mode

3. Set High air flow limit

“Hi” LED flashes Press <CHANGE> to set upper air flow limit as indicated on bar graph.

Press <SELECT> once desired high air flow limit is selected to accept and cycle to next mode

4. Set Low air flow limit

“Lo” LED flashes Press <CHANGE> to set lower air flow limit as indicated on bar graph.

Press <SELECT> once desired low air flow limit is selected to accept and cycle to next mode

5. Set Flow Delay ‘Hi/Lo Flow’ LED’s both flash

Press <CHANGE> to set required delay on Bar Graph (see Table 7)

Press <SELECT> once the desired Flow Delay is selected to accept and cycle to next mode

6. Calibrate Flow Sensors

Fan Fault LED flashes

then

Power On and Fan Fault Flash

Once the Fan Fault LED is illuminated, press and hold the <CHANGE> key until all LEDs are extinguished and the fan stops. After a few seconds, the “Power On”, “Fan Fault” and “Unlock” LEDs start flashing. The fan remains off to calibrate zero flow. After a few seconds, the fan turns on to calibrate normal flow. On completion of calibration, the unit exits the setup mode, and the airflow is displayed.

NoteShould any change be made to the pipework, or any fanadjustment made, then it is necessary to re-calibrate the fansensors as in step 5 of table 1, or step 8 of table 2, as relevant.

Bar Graph Displays

Once the set-up mode has been exited, the current airflowlevels are displayed on the cumulative bar graph display; theHigh and Low flow limits are also shown.

SET-UP NOTES

The Fan Speed, Flow Limits and Flow Sensitivity need to be setfor each installation prior to Flow Calibration and

testing. It is not possible to provide the settings for all possibleinstallations but the following guidelines should assist in thecommissioning of the unit.

NoteSetup functions are displayed sequentially as in tables 1 and 2.


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Fan Speed

The Fan Speed should be set as high as possible to achieve thefastest transport time from the sampling point to the sensors,this is especially important for longer pipe lengths and forinstallations that must conform to the requirements of EN54-20.There is, however, a balance to be achieved betweenperformance and the unit’s power requirements, and referenceshould be made to the current consumption figures in thespecifications prior to setting this value. Fan speeds of 3 andbelow should not be used for standard configurations.

Flow Sensitivity

This setting determines the responsiveness of the system inreporting blocked sampling points or broken pipes.

The default flow sensitivity value of 9 will configure the unit todeclare a flow fault whenever there has been a change involumetric airflow of ± 20% from the calibrated reading for atleast the duration of the ‘out of fault’ flow delay (see below). Formost installations, especially if compliance with EN54-20 isrequired, the default setting should be used.

Table 2: A320E: Set-Up Procedure.

In certain circumstances, such as rapid changes in ambient airpressures due to air handling units, doors opening/closing etc.the default setting may appear to be too sensitive. As a first step,under these conditions, the flow delay setting should beincreased to allow time for the air pressures to stabilise after thetemporary event (see below).

Only under extreme environmental conditions or non standardpipe configurations should decreasing the flow sensitivity beconsidered.

Flow Delay

An increase/decrease in flow above/below the FLOW HIGH/FLOW LOW limits will result in a FLOW FAULT after a delay ofapproximately 15s. Once the flow is returned to a normal level,the fault condition will be cleared within about 2s. These are thefactory set default values.

In environments where the sampled airflow may be affected bysudden temperature/pressure changes or there is a risk ofphysical interference with the sampling point (e.g. prison cellapplications), it may be necessary to increase the delaybetween the flow going out of limits and signalling a FLOWFAULT condition. Delay values of up to 270s before signalling afault are available when setting up the detector.

Step Mode Indication Function

1. Set Fan Speed “Power On” LED Flashes Sets aspirating system fan speed.

Press <CHANGE> to cycle through fan speed settings for 0 to 9 indicated on LED bar graphs. Fan speed will change as the settings cycle though.

Press <SELECT> once desired speed is selected to set speed and cycle to next mode

2. Set Channel 1 Bar Graph Sensitivity

Channel 1 “OK” LED Flashes

Press <CHANGE> to set air flow sensitivity as indicated on Channel 1 bar graph.


3. Set Channel 2 Bar Graph Sensitivity

Channel 2 “OK” LED Flashes

Press <CHANGE> to set air flow sensitivity as indicated on Channel 2 bar graph.


4. Set Channel 1 High air flow limit

Channel 1 “Hi” LED flashes Press <CHANGE> to set upper air flow limit as indicated on Channel 1 bar graph.


5. Set Channel 1 Low air flow limit

Channel 1 “Lo” LED flashes

Press <CHANGE> to set lower air flow limit as indicated on Channel 1 bar graph.


6. Set Channel 2 High air flow limit

Channel 2 “Hi” LED flashes Press <CHANGE> to set upper air flow limit as indicated on Channel 2 bar graph.


7. Set Channel 2 Low air flow limit

Channel 2 “Lo” LED flashes

Press <CHANGE> to set lower air flow limit as indicated on Channel 2 bar graph.


8. Set Flow Delay ‘Hi/Lo Flow’ LED’s both flash

Press <CHANGE> to set required delay on Bar Graph (see Table 7). Note that both channels will have the same setting.

Press <SELECT> once the desired Flow Delay is selected to accept and cycle to next mode

9. Calibrate Flow Sensors

Fan Fault LED flashes

then

Power On and Fan Fault Flash

Once the Fan Fault LED is illuminated, press and hold the <CHANGE> key until all LEDs are extinguished and the fan stops. After a few seconds, the “Power On”, “Fan Fault” and “Unlock” LEDs start flashing. The fan remains off to calibrate zero flow. After a few seconds, the fan turns on to calibrate normal flow. On completion of calibration, the unit exits the setup mode, and the airflow is displayed.

Table 7: Flow Delay Settings

BARGRAPH LED FLOW INTO FAULT DELAY FLOW OUT OF FAULT DELAY(Seconds) (Seconds)

0* 15 2

1 30 18

2 60 18

3 90 18

4 120 18

5 150 18

6 180 18

7 210 18

8 240 18

9 270 18

*Factory default setting Note: all timings are approximate


Table 4: A300E Current Consumption

Table 5: Problem Solving

Fan Speed Current mABargraph Value

0 110

1 120

2 130

3 150

4 170

5 190

6 220

7 235

8 265

9 300

Pipe Balancing for Two Pipe SystemsWhere two pipe systems are being used (as in the dual channelsystems examples on the following pages), the pipes should bebalanced - that is of equal length and having equal size andnumber of holes.

The use of additional bends, as described earlier in the Bendssection, will have a minimal effect on performance (responsetime).

Note: Please see the table in Appendix 3: EN54-20 Certifiedsensors for EN54-20 hole and pipe length limits for certifiedsensors.

TESTING

Testing should only be carried out by qualified personnel.Before undertaking any testing ensure that the properauthorities have been informed, and if necessary, that theunit has been isolated from the fire control panel to preventunwanted alarms.

Sensor Testing

With the unit powered up and the top cover removedthe sensors can be tested for functionality using methodsdescribed by the manufacturer (for example aerosol spray ormagnet test).

System Testing

Alarm: The installed system must be checked with the topcover securely fitted. As a minimum, smoke should beintroduced to the furthest sampling point from the A300E unit oneach branch of the pipe. The choice of smoke source isdependant on the installation but in all cases the smoke mustbe present for the duration of the test – aerosol sprays for pointdetectors DO NOT work on aspirated systems.

If it is possible to get close to the sampling point then a basic,functional check can be carried out with smoke matches orlighted taper etc. But for measurable performance tests thenrefer to Appendix A of the FIA Code of Practice for AspiratingSystems to select the appropriate test for the installation.

Fault: Simulate a fault on the A300E unit (for example, removethe power) and check that a fault is signalled at the fire panel.

MAINTAINANCE

With normal use, the filter elements will eventually becomecontaminated with dust particles, impeding airflow. It isrecommended that it be changed every six months.

To change the filter:

1. Unscrew the top cover2. Lift out the foam filter elements from its housing3. Fit a new filter kit so that it lies flush with the top of its housing4. Replace the top cover5. Test the unit as described above.

IMPORTANTTo ensure maximum efficiency and longevity of the filter, whenfitting the replacement filter element kit, the Coarse filter needsto be fitted first into the pipe.

ACCESSORIES

The following accessories are available to order:

Model Number Product

02-FL53 Black Course (20 ppi) Replacement Filter Element (x10)02-FL53W White Course (20 ppi) Replacement Filter Element (x10)02-FL56 Black (45 ppi) Replacement Filter Element (x10)02-FL56W White (45 ppi) Replacement Filter Element (x10)

20-LA0015 Replacement Key to Open Detector.

Problem Possible Solutions

Power light flashing. Ensure supply to external powerconnector within limits.

No lights on display. Ensure supply leads correctlyFan not running orientated. Ensure that FUSE

correctly seated in socket and fusenot blown.

No lights on display. Ensure ribbon cable fully seated intoFan running OK. main & display boards.

Flow HI/LO light on Ensure sampling pipes correctlyinstalled, lid fitted and box fully sealed.Ensure filters not blocked.Ensure flow calibration procedure hasbeen carried out

Flow reading on Bargraph Decrease Flow sensitivity settingdisplay moves erratically. and re-calibrate air flows

Flow reading on Increase Flow sensitivity settingBargraph unresponsive and re-calibrate air flowsto broken/blocked pipes

Sensor(s) unresponsive Ensure sampling pipe installed correctlyto smoke tests and undamaged. Ensure that holes

and pipe length do not exceed limitsfor detector. Ensure thatrecommended test method is used.


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Example 2: With Bends :

# Not including 6mm end cap hole

ASPIRATING SYSTEM CONFIGURATION

Set out below are some examples of maximum length pipeconfigurations that can be used with an A300 unit fitted with the7251 sensor. It should be possible to adapt these examples forshorter pipe run systems; however some specific applicationswill have specific considerations that must be taken intoaccount, and local standards may also apply.

The default size for sample holes is 3mm, and the end hole is6mm. Ensure that no hole is less than 100mm from a bend or ‘T’piece

Appendicies 3.1 and 3.2 shows the maximum allowable pipelengths for EN54-20 compliance. In the examples shownbelow, which fulfill the requirements of the 3.1 and 3.2 tables forClass C Only, the fire alarm threshold, set at the control panel,should be at the 7251 laser sensor sensitivity level 1 (mostsensitive).

For short to mid range application, it is recommended that thefan speed for the A300E is kept at a default setting of 5 (this willbe suitable in many circumstances). The primary effect ofchanging the fan speed will be to increase or decrease thetransport time.

Default settings are programmed into the detector for the highand low flow limits. It should not normally be necessary tochange these settings.

Table 6 displays recommended pipe lengths when using ‘T’pieces.

NOTEIf using a sensor other than the 7251 Laser, see Appendicies3.1 and 3.2 for details of pipe lengths and holes.

Table 6: A300E Series ‘T’ Piece Installation Limits

The following figures apply to System Sensor A310E / A320Edetectors fitted with 7251 sensors

All pipes are Metric 25mm or Imperial 3/4” (27.6mm). All sampleholes are 3mm, with 6mm end hole.

A310E Single Channel System

Example 1:

AspiratingSmoke

Detector

25mm Pipe Diameter with 3mm Sampling Holes

Height FromGround 1.5 m

Riser Height1.0 m

Ceiling Height2.5 m

Pipe Length(Including Riser

and Bends)100 m

First Hole 4.0 m from Riser

6mm End Hole

46.5m

42.5m

10m

Top View

(9 Holes)

(8 Holes)

AspiratingSmoke

Detector



6mm End Hole

Riser Height1.0 m

Ceiling Height2.5 m

Pipe Length(Including Riser)

100 m


Pipe No. Hole Fan AlarmLength of 3mm Spacing Speed Level(m) Holes (m)

100 18 5.3 9 1


100 17 5.25 9 1

DETECTOR A310E A320E

SENSITIVITY ALARM LEVEL 1 1(set at the panel)

FAN SPEED 9 9

SINGLE ‘T’ (2 PIPES) PER INLET -Max Length (Per Pipe) Metres 100 50Max Number of Holes (Per Pipe) 9# 6#


A320E Dual Channel System

Example 1:

Example 2: With Bends :

Using T Pieces

Note 1: It is important that the airflow through the 2 branches is balanced,so each branch will need to be of a similar length and number of holes.

Note 2: Using more than one T piece on each channel has not beentested and therefore cannot be recommended.

Example 1: 1 Channel

AspiratingSmoke

Detector

Pipe Length (Including Riser and Bends) 2 x 100 m

Ceiling Height2.5 m


Riser Height1.0 m


6mm End Hole

Top View

5 m

5 m

4 m

First Hole 9 m from Riser

Pipe Length to Bend 94 m

Example 2: 2 Channel

AspiratingSmoke

Detector

6mm End Hole

Pipe Length(Including Riser)

2 x 100 m

Ceiling Height2.5 m


Riser Height1.0 m




2 x 100 2 x 18 5.3 9 1


2 x 100 2 x 18 5 9 1

AspiratingSmoke

Detector

6mm End Hole

Pipe Lengths(Including Riser)

Up to 100 m

Ceiling Height2.5 m


Riser Height1.0 m

25mm Pipe Diameter with 3mm Sampling Holes - 1 Channel with T-Piece

5 m


6mm End Hole


1 x 2 2 x 9 10.5 9 1x 100


2 x 2 2 x 2 5 9 1x 50 x 6

AspiratingSmoke

Detector

6mm End Hole

Pipe Lengthsfrom bend

34 m

Ceiling Height2.5 m


Riser Height1.0 m

25mm Pipe Diameter with 3mm Sampling Holes - 2 Channel with 2 T-Pieces

10 m


6mmEnd Hole

Top View

5 m

4 m from bend to first hole

Distance BetweenPipes 10 m



10 m

5 m

4 m from bend to first hole

Pipe Lengthsfrom bend

34 m


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APPENDICESDetailed here is information to assist in the set-up of the air-samplingsystem, including:1. Basic Principals of Aspirating Systems

2. Guide to Available Pipe Parts

The pipe network is just as important as the detector itself in providinga means of obtaining a reliable and continuous sample of air to bemonitored.The pipework for air-sampling systems can vary greatly depending onthe particular application. The following are guidelines that can beapplied to any wide-bore systems. Please remember that these aregeneral guidelines only. For each specific installation the localstandards and codes of practice should be adhered to. Guidance onthe design of systems is given in BS 5839, BS 6266 and/or FIA Code ofPractice for Aspirating Detection Systems.

1. Basic Principals

Figure 1.3.1 Smoke Dilution

Figure 1.1 Pipe System Operation

1.1 Smoke TestsIMPORTANT

It is strongly recommended that, before designing the pipe-worksystem, smoke tests be undertaken in order to show thepatterns of air movement within the areas to be protected. This isparticularly important in rooms with air-handling equipment. Inall cases the aim must be to place the sampling pipes at theposition the smoke is most likely to reach.

Smoke boxes or smoke matches can be used to establish airmovement within the protected area, from which the best place tolocate the pipes can be discovered, as well as where to place thesampling holes in the pipe.

If air handling equipment is present in the environment, considerationmust be given to all the variable settings that are available (forexample, if it is switched on or off, or if an air conditioning unit has adirectional wave facility).

1.2 Response TimesThis is the transport time taken from when a sample enters a pipe towhen the detector unit enters alarm mode.

Response times should be within reasonable limits. The simplestmethod of achieving this is to keep pipe lengths to a minimum. This maynot always be possible but in the following example the benefits ofusing more than one pipe in short lengths is demonstrated (this is beingused as a general example only, for any specific installation a propercalculation will need to be made - This would include the length of thepiping, height of the room,the frequency and size of the sampling holesetc).

In Figure 1.2.1, a room has a single sampling pipe that providesdetection for the whole room:

Aspirating Unit containing detector

and fan

Fan draws air down pipe system for

detector to sample smoke plume rises and enters pipe system through

sampling point holes

Figure 1.2.1 Single Sampling Pipe

In Figure 1.2.2, the same room has a two channel sensor, allowing twosampling pipes:

Figure 1.2.2 Two Sampling Pipes

The system gives the same coverage as it would with one pipe, but theresponse time is quicker. The principal shown here is also relevantwhen considering the dilution rate. Please see the following section fordetails on this.

1.3 DilutionThe response time example does not only show the benefit of shorterpipes on response times. Dilution is also kept to a minimum by reducingthe length of the pipes. As the name suggests, dilution is the processof lessening the concentration of smoke particles as the sample isdrawn towards the detector.

For example, if there is a sampling pipe measuring 50 metres and Ithas sampling holes every 5 metres, giving 10 sampling holes includingthe end cap. It can be assumed in this simplified case that the samplingholes let in approximately the same amount of air as each other.

A smoke source of 2% obscuration/metre is introduced at the far endof the pipe. No other smoke is entering any of the other sampling holes.As the smoke passes each hole, it is added to with clean air. When thesample reaches the detector it is now at 0.2% obscuration/metre or 1/10th of its starting density. Therefore if the first alarm threshold is set at0.2% obs/m, the smoke outside the hole must exceed 2% obs/m tosound the alarm.

It is the case, therefore, that the longer the pipe and the greater thenumber of sampling holes, the more susceptible the system will be todilution. It is wise to work on a worst case principle in these situations.In actuality the calculation of dilution is not as straightforward as aboveand more factors are involved. Each system will have differentcharacteristics meaning precise calculation is extremely complicated.Issues that will affect the dilution rate include size and number of holes,T-pieces and elbow joints in the pipe system, diameter of the pipe itself,and outside elements such as air temperature, pressure and humidity etc.

Let us say that the response time for smoke that Entered the very end of the pipe was 34 seconds

Smoke Enters Here

Smoke Enters Here

With two pipes feeding into a 2 channel detector, the pipe length is approximately halved, and so is the response time to 18 seconds


As seen in the previous section on response times, shorter pipe runsminimise dilution. In Table 1.3.1 there is a rough guide to varying dilutionrates for wide-bore systems - IMPORTANT: The differentcharacteristics of each installation must also be taken into accountwhen assessing the dilution rate. many factors can affect this, aspreviously discussed.

Table 1.3.1 General Dilution Rates for Wide-Bore Systems

1.4 Pipe Construction and Sampling HolesSingle channel System Sensor aspirating detectors have a maximumpipe length of 100 metres.

Dual channel aspirating detectors have a maximum pipe length of 100metres for each channel. Wherever possible, the pipe lengths for eachchannel need to be kept to broadly similar lengths (for example, ifchannel 1 has a pipe length of 30 m, channel 2 should be approximatelythe same length). Failure to do this can result in slow response times,thereby negating some of the early warning ability of the system.

System Sensor recommends that ABS piping be used due to itsstrength and heat resistant properties. The pipe sections should beglued together using a suitable ABS glue to avoid separation or leaks.If a section of pipe is likely to need to be disconnected for some reasonin the future, removable unions should be used instead.

Important: Never glue pipes into the aspirating detector unit itself.

Sampling holes should be 3mm in diameter. The end of the pipe shouldbe capped and have a hole of 6mm in diameter.

Important: Elbows and bends in the pipe system can affect theflow of air/smoke through the pipes and should only be usedwhen necessary.

Capillary SamplingShort lengths of small diameter flexible pipe may be spurred off fromthe main wide-bore pipe. This pipe should have an internal diameter ofno less than 7mm and can be of lengths up to 2 metres. For this asampling point assembly should be used (an example is shown below).

Capillary tubes can be used to provide concealed sampling points. Ifthe sampling points need to be as unobtrusive as possible, thecapillary allows the point to be placed flush to the surface. These aremost commonly used when the main wide-bore pipe runs through aceiling void, with capillary sample pipes placed through the falseceiling.

Note 1: It is recommended to avoid running lengths of pipe withboth standard sampling holes and capillary sampling points onthem as this can unbalance the airflow and slow the responsetime from the capillary points.

Note 2: Though British Standard BS 5839-1 states that theremust be a minimum of 25mm between the ceiling and thesampling point of a detector, because the aspirating systemactually draws air through the sampling points (holes in thepipework in this case), it can be possible to mount the samplingpoints flush with the ceiling providing this will not bedetrimental to the effectiveness of the system to detect fire (see1.1 Smoke Tests).

1.5 The Design ProcessWhen designing the actual sampling pipe network there are manyfactors that need to be considered. The site must be carefullysurveyed and as much information as possible should be gathered.

1.5.1 RequirementsThe first consideration is to precisely ascertain the requirements of theinstallation. Once these have been decided, the type of situation can belooked at.

1.5.2 ActivitiesThe types of activities that take place within the space are veryimportant. A public area of a particular shape could well have differentsystem requirements to a warehouse of a similar shape.

Other information such as the expected hours of operation, whetherthe area is manned or unmanned and whether any pollution or dirty airis present should also be taken into account.

1.5.3 Physical CharacteristicsOnce the general installation type has been considered, the physicalcharacteristics of the space should be looked at.

· Is it a room, void, cabinet or enclosure?

· Are there any floor or ceiling voids and, if so, how are theydivided, are there any ducts, what are these used for and arethere any services already present?

· What are the exact measurements of the space?

· What materials have been used and are there any areas wherethe network has to avoid?

· Are there any existing fire protection systems and where arethey situated?

1.5.4 Environmental ConditionsThe environment within the space can have a very significant bearingon which sampling method should be used to protect it. As alreadymentioned, the smoke tests are vital in gathering this information. Thiscan tell you the patterns of air movement, the rate of circulation andwhether the airflow is static at any point. Other considerations include:

· If fresh air is introduced, at what rate and in what quantity?

· Is a reference detector necessary due to pollution?

· What is the temperature and relative humidity and are theseconstant or variable?

· Are there any activities that may produce smoke, dust, steamor flames and how often does this occur?

1.5.5 Risk AssessmentWith any installation it is likely that some areas require more protectionthan others. This could be because of expensive equipment or aparticularly vulnerable area such as a store for flammable materials.These more susceptible areas must be considered along with anystructural hazards such as synthetic materials and foams or soft woodpartitioning.

1.5.6 Potential SitesThere are also factors to consider when deciding where to position thedetector unit itself. The main aim when positioning the unit is to try toensure a balanced system. This means that the pipes should be kept atsimilar lengths. It is also important to try and keep response times anddilution to a minimum.The unit requires a power supply and access will be required formaintenance. There may also be aesthetic reasons why a particularposition is not suitable.

1.5.7 Exhaust PipeThe exhaust pipe on the bottom of the aspirating detector unit can havepiping added should it be required, for example if the air passingthrough the detector needs to be returned to its source. Extra pipingcan also be used to reduce the noise of the fan if needed.


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2. Guide to Available Pipe PartsSystem Sensor offers the following pipe parts:

Metric 25mm Pipe Options

Model Number Product Description

02-0001-25 Large Bore Red Pipe 3m Length, 25mm

02-1001-25 Straight Union Large Bore 25mm

02-1002-25 90 deg. Bend Large Bore 25mm

02-1003-25 45 deg. Elbow Large Bore 25mm

02-1005-25 Removable Union Large Bore 25mm

02-1007-25 T-Piece 25mm

02-1006-25 End Cap for Large Bore 25mm

VSP-850-G Filter Unit 25mm With Filter Element(for Harsh environment)

VSP-855-4 Replacement Filter Element

02-1008-15 Flush Capilary Sampling Point (T Piece & 1.5mCapillary Tube) For use with false ceilings

02-1016-15 Raised Capilary Sampling Point (T Piece & 1.5mCapillary Tube) For use with false ceilings

02-WT-01 Water trap

02-1009-00 Sampling Point Label (Roll of 100)

02-1110-00 Closed Pipe Clip (25mm)

02-1014-08 Stud clip 8mm - black 1002-1014-10 Stud clip 10mm - black 10

02-1015-30 Channel clip 8mm - black 1002-1015-41 Channel clip 10mm - black 10

02-1013-25 Wall anchor clip - black 10


3. EN54-20 Certified SensorsThe recommended sensor for use with the A300 units is the7251, however, the following sensors have beenindependently tested and certified for use in the A300 unit andare suitable for EN54-20 approved Class A, B or C installations,or Class C installations. The following sections will show therequirements for compliance in each category.

IMPORTANTIf your installation conforms to EN54-20, In order to becompliant it is necessary to add one of the enclosed over-labelsto the product label for the A300 unit - as indicated in section 3.3Over-Label Application.

3.1 Class A, B and C EN54-20 Certified SensorsThe following sensors are suitable for Class A, B and Cinstallations:• System Sensor 7251 (also known as Pinnacle)• Notifier FSL-7251E (also known as View)The Class A, B, C over-label should be applied as shown inSection 3.3 Over-Label Application below. The maximumnumber of holes for these sensors is printed on the over-label.

Sensitivity and Maximum Holes per Class

1 - For Class C figures add 1 x 6 mm end cap hole2 - Class B figures Include a 4 mm end cap hole3 - Class A figures Include a 4 mm end cap hole

The table shows the limits that should not be exceeded for thethree sensitivity classes. Figures are based upon the AspiratingSystem Configurations displayed earlier in the manual.

Note: Any changes to the standard configuration or settingsshown above should be verified using the System Sensor pipemodeling software (available from your supplier).

3.2 Class C EN54-20 Certified SensorsThe sensor in the table below is suitable for Class Cinstallations only. The Class C over-label provided with theA300 devices should be applied as indicated in section 3.3Over-Label Application, with the maximum number of holeswritten in the white box provided.The table shows the limits that should not be exceeded if theinstallation is to conform to Class C requirements. All figuresare based on a fan speed of 9.

System Sensor 2251EM Tested and Certified Class C Sensor

A. Using standard sensitivity alarm levelB. Using high sensitivity pre-alarm level

3.3 Over-Label ApplicationThe over-label for the Class A, B and C or Class C complianceshould be applied on top of the main side label as shown in theillustration below. The bottom and side edges of the over-labelshould be aligned with the bottom and side edges of the mainlabel on the detector housing.

Detector side view showing the position of the over-label onthe main side label

ASD

Main Label(Already Fitted)

Over-LabelPlacement

Sampling Hole Maximum Number Max PipeLimits per Pipe of Holes per Pipe Length (m)

per Pipe

1 x 8 mm End Hole 1 50

2 x 5 mm Holes 1 + 1 End Hole 50

A

B

Maximum Number of Holes Max PipeSensitivity per Class, per Pipe Length (m)Settings Class C1 Class B2 Class A3 per Pipe

3mm holes 4mm holes 4mm holes

1 18 6 3 100

2 9 3 1 100

3 4 1 N/A 100

4 1 N/A N/A 100

5 or above N/A N/A N/A N/A


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4. Unusual ApplicationsIn these different and variable situations, it is vital to perform smoketests to establish the air movements.

4.1 Freezer roomsFreezer rooms often introduce extra difficulties into the design of asystem. The air temperatures at which the room operates must betaken into account.If the aspirating pipe network is inside the cold room the following pointsshould be noted:1) The pipes should be suspended (or attached) further away than

usual from the ceiling or wall as these may contract and expandwith large changes in air temperature.

2) Sampling holes should be drilled on the side of the pipes tominimise the risk of blockage owing to ice formation.

3) Vertical pipes running into the room from outside, and areas wherecondensation could collect, must be avoided.

Figure 4.1: Typical Freezer Room Example

Temperature changes may cause expansion or contraction in theaspirating pipe. ABS pipe has a linear coefficient of expansion ofaround 10-4/°C and large temperature changes can have a significanteffect. These changes typically occur as the system is run tooperational temperature. So the air can easily vary from +18°C atinstallation to -35°C in operation, representing a 53°C differential. Thisdrop applied to a 50m pipe run gives an expected end to end pipemovement of 265mm. If the design of the system gives no allowancefor such variation in the pipe length, it is advisable to incorporate one ormore simple ‘U’ bends to act as an expansion/contraction point asshown:

HeaterElement

Pipe Falls TowardsHeater

SealStand-Off

300mm Minimum

Holes Drilled in Side of Pipe

AspiratingDetector Insulate From Wall

Air Return

Freezer Room

WaterTrap

Aspirating Detector and Associated EquipmentLocated Outside Freezer Room

Seal

4.2: Cold StoresCold stores are similar to the freezer rooms with one major difference,the temperature. The temperature in a cold store is a lot less than afreezer and is typically just at or above 0°C.The pipes should be kept out of the immediate airflow from a chiller unit,if used, as its air is often significantly colder than the room itself in orderto maintain the correct temperature.In a cold room application it is not usually necessary to use a heaterelement but only a water trap to remove condensation.

4.3: High buildingsTypical examples: Atria; CathedralsWhen designing a system to fit in a very large and high room such asan atrium or high level warehouse, it is important to consider thevarious possibilities. A simple atrium design is shown below, utilisingtwo pipes. The smoke cloud is shown as an example of how astratification layer prevents the pipes at the top of the building fromdetecting smoke particles. The height at which the smoke forms a layervaries depending on temperature and therefore a vertical samplingpipe is used to cover this. There may be no stratification layer at all if theair in the room is at a particular temperature, especially if smokeventilation is needed.

Figure 4.3: Typical Atrium Example

Sampling Pipes

Sam

plin

g H

oles

AspiratingDetector

Smoke Stratification Layer

Figure 4.4.1: High Roof Example 1Pipes Running Across the Width of the Roofline

AspiratingDetector

Maximum 10m BetweenPipes at the Roof

Pipes Run the Width of the Building (across the Roofline)

4.4: Supermarkets and Storage AreasSupermarkets and storage areas require a high level of protection dueto the possible number of people using the space at certain times of theday and/or due to the value of the goods present.There are two ways of applying the pipe network. The exact structureof the roof is likely to determine the better or most appropriate solution.The pictures below assume a simple room layout.In one alternative the pipes will follow the contour of the roof. To complywith UK code of practice BS5839:1, pipes will be placed at a maximumdistance of 10m from each other and sampling holes will also be sitedat a maximum of 10m from each other, with the hole serving the apexno more than 600mm away from the roof.


Figure 4.4.2: High Roof Example 2Pipes Running Parallel to the Roofline

Max.10m

Max.10m

Pipes Run the Length of the Building (Parallel to the Roofline)

Aspirating Detectors

The second alternative shows the pipes running in parallel along theroof. Again to comply with UK requirements the pipes should be amaximum distance of 10m apart, sample holes in each pipe will be 10mfrom each other and the pipe serving the apex should not be furtherthan 600mm from the top of the roof.

4.5: WarehousesWarehouses can be considered to be similar to supermarkets exceptthe same problems that can occur with high buildings need to be takeninto account as well. Vertical sampling points may be needed and thepipe lengths should be considered carefully to ensure reasonableresponse times.

INSTALLATION AND MAINTENANCE … · Supply Current: 120 mA - 500 mA depending on fan speed ......

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