Linear Heat Detector

Linear Heat DetectorFCS-LWM-1

en Product Information

Linear Heat Detector Table of Contents | en 3

Bosch Sicherheitssysteme GmbH Product Information F.01U.028.513 | 2.0 | 2010.11

Table of Contents

1 Safety Instructions 4

2 Short Information 52.1 Short Description 52.2 Features 5

3 System Overview 63.1 Graphical Representation 63.2 Functions 73.3 Sensor Cable 7

4 Planning Notes 84.1 Types of Sensor Cable 84.2 Linear Installation 84.3 Area Installation 9

5 Installation 115.1 Installing the Detector Box 115.2 Cable End Connection 115.3 Intermediate Connections 125.4 Installation in Ex-zones 13

6 Connection 146.1 Control Unit and Fire Panel 146.2 Sensor Cable and Control Unit 146.3 Calibration 15

7 Maintenance 197.1 Inspection 197.2 Troubleshooting 20

8 Technical Data 218.1 Electrics 218.2 Mechanics 218.3 Resistivity: Sensor Cable (Black) 22

4 en | Safety Instructions Linear Heat Detector

F.01U.028.513 | 2.0 | 2010.11 Product Information Bosch Sicherheitssysteme GmbH

1 Safety InstructionsCAUTION! Product components can become damaged by electrostatic discharge.Wear a grounding wrist strap if you are working on the open PCB.

CAUTION! Do not connect the grounding drain wire to grounding clips 3–4, because connection to the grounding drain wire will raise a fault message to the BZ 500 and UEZ 2000 fire panels.

NOTICE! The FCS-LWM-1 Heat Detector is intended for use with the DIN EN 54-5:2000 response grades A1, A2, B, and C. See also Page 15.

NOTICE! The FCS-LWM-1 Heat Detector can be used in ex-zones 1, 2, 21, and 22. For notes on installation in Ex zones, see Page 13.

NOTICE! The maximum monitoring height is 7.5 m. For rooms with higher ceilings a special VdS authorization is required.

NOTICE! Have maintenance and installation work carried out regularly by trained, qualified personnel only. Bosch Security Systems recommends a functional and visual inspection once a year.

NOTICE! Unusable electronic devices may not be disposed of with the household garbage, but rather in accordance with the applicable regulations and directives (e.g. WEEE).

Linear Heat Detector Short Information | en 5


2 Short Information

2.1 Short DescriptionLWM-1 is a linear heat detector for detecting fire. It is especially suitable for use in constricted spaces and under extreme environmental conditions. LWM-1 comprises a detector box with control unit and a sensor cable with four copper wires. Its functionality is based on the change in resistance of an electrical conductor caused by a rise in temperature, with its response behavior approximating that of a thermal maximum detector. The sensor cable is available in 3 versions to suit different applications and environmental conditions:– Blue sensor cable– Black sensor cable with nylon coating– Black sensor cable with nylon coating and steel nettingThe blue sensor cable is the standard cable and can be used for monitoring applications in extremely dusty and humid conditions. This cable is not resistant to UV light and is therefore unsuitable for outdoor use. The black sensor cable with nylon coating exhibits increased stability in hostile chemical and biological environments and is intended for applications in which acidic, alkaline or solvent vapors occur. This cable is not suitable for outdoor use. Besides the aforementioned properties, the black sensor cable with nylon coating and steel netting also offers protection under mechanical stress.

2.2 Features– Installation under extreme environmental conditions such as those found in ex-zones 1,

2, 21, and 22 is possible– Suitable for DIN EN 54-5:2000 response grades A1, A2, B, and C– Resistant against mechanical and chemical influences, corrosion, humidity, and dust– Simple installation and start-up– Minimal maintenance costs through continual self-monitoring of the sensor cable– Configurable response temperature– Combined MAX/DIFF switch, can be configured to the grade required– Sensor cable length up to 300 m– Detects temperature overruns, even from long distances– Test switch for maintenance (simulates alarm and fault)

6 en | System Overview Linear Heat Detector


3 System Overview

3.1 Graphical Representation

Figure 3.1 Connection assignment

No. Designation Assignment1 PWR- Supply voltage2 IN+ Supply voltage3+4 Grounding clamps (not used)

5 SENSOR OR Orange sensor cable6 SENSOR WH White sensor cable7 SENSOR BL Blue sensor cable8 SENSOR RD Red sensor cable9 EXT. RESET External reset input10 EXT. RESET External reset input11 FAULT NO Fault relay, normally open12 FAULT CM Fault relay, contact made13 FAULT NC Fault relay, normally closed14 MAX ALARM NO MAX ALARM relay, normally open15 MAX ALARM CM MAX ALARM relay, contact made16 MAX ALARM NC MAX ALARM, normally closed17 DIFF ALARM NO DIFF ALARM relay, normally open18 DIFF ALARM CM DIFF ALARM relay, contact made19 DIFF ALARM NC DIFF ALARM relay, normally closed20+21 Unused --22 MAX+DIFF MAX ALARM or DIFF ALARM actuate

both relays23 ISOLATE Does not transmit fault or alarm

messages to fire panel when "ON"24 DIFF TIME Calibration switch – time span of

increase in temperature25 DIFF ALARM Calibration switch – response

temperature depending on DIFF TIME26 MAX ALARM Calibration switch – response

temperature

11

12

13

14

15

16

17

18

19

LWM 1

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

20212223

24

25

26

27

28

29

1

2

3

4

5

6

7

8

9

10

Linear Heat Detector System Overview | en 7


3.2 FunctionsThe control unit reports temperature differences by continuously monitoring the resistance in the sensor cable. If the temperature rises, the electrical resistance falls and the control unit outputs an alarm message depending on the set response temperature. The response temperature for the MAX ALARM is set using a 16-position switch. If the set response temperature is exceeded, an alarm message is output. The differential alarm threshold for the DIFFALARM is set in steps using two 16-position switches.– DIFF TIME – DIFF ALARMWith DIFF TIME, the time span of the increase in temperature is set. The longer this time span is, the higher the likelihood that an alarm will be triggered, i.e. a 30°C temperature change occurring within 10 s is more likely to trigger an alarm than the same temperature change occurring within 3 s.DIFF ALARM sets the temperature at which an alarm is to be triggered in dependence of DIFF TIME. If the selected DIFF ALARM switch position is higher, the alarm temperature will be higher too. This means that if the alarm temperature is set at 45°C and this temperature is exceeded within a defined time span (DIFF TIME), an alarm is triggered.Located on the control unit are four LEDs, which display the status. The green LED signals normal mode, the yellow LED a fault and the two red LEDs either MAX ALARM or DIFF ALARM.The control unit features three keys. The two test keys TEST FAULT and TEST ALARM can be used to test the system for fault or alarm. The RESET key restores the system to its original status.

3.3 Sensor CableThe four copper wires on the sensor cable are each surrounded by a color-coded (orange, white, red, blue) material with a negative temperature coefficient and encased in a thermally resistant external coating. Two copper wires (orange/white, red/blue) are connected to the bare end of the sensor cable to form two loops. The end of the sensor cable is then hermetically sealed. Both loops are continually monitored. In the event of an interruption or short circuit, the control unit outputs a fault message. If the temperature rises, the electrical resistance between the two loops changes. The control unit detects this change and triggers the alarm if the defined response temperature is exceeded. Both short, overheated sensor sections and longer sections with smaller temperature increases are detected. Destruction of the sensor results in a fault.

27 TEST FAULT System fault test (press button for 2 seconds – triggers after around 20 seconds)

28 TEST ALARM System test alarm29 RESET Restores the control unit to its original

status

No. Designation Assignment

8 en | Planning Notes Linear Heat Detector


4 Planning Notes

4.1 Types of Sensor CableThe FCS-LWM-1 Heat Detector can be used with three different types of cable:The standard blue cable is used if increased dust and/or humidity is expected in the monitoring zone. This cable is not suitable for outdoor use, because it is not UV-stable.The black sensor cable with nylon coating exhibits increased stability in hostile chemical and biological environments and is therefore intended for use in monitoring zones where acidic, alkaline or solvent vapors occur. Furthermore, this cable is UV-stable and is therefore suitable for outdoor use.The black sensor cable with steel netting is protected against mechanical influences (e.g. coal conveyor belts) and hostile chemical and biological environments.

4.2 Linear InstallationThis installation method is generally used to protect long drawn-out objects, which may take various forms:– Installation in immediate vicinity of conveyor belts– Installation in cable shafts

Conveyor Belts

Figure 4.1 Installation in immediate vicinity of conveyor belts

In this case, a sensor cable for monitoring products in transport is installed immediately above the conveyor belt. The distance between conveyor belt and sensor cable must not exceed 2 m. Two further sensor cables are installed to the left and right of the rollers to monitor products falling from the conveyor belt.

1 Sensor cable2 Fastening the sensor cable pads

1

2

Linear Heat Detector Planning Notes | en 9


Cable Shaft

Figure 4.2 Installation in cable shaft

The sensor cable is installed at a distance of approx. 15 to 20 cm above the cable platforms. This means that if the monitored cables overheat, the heat will be effectively transferred to the sensor cable.

4.3 Area InstallationRoom monitoring makes use of the area installation method.Typical applications include:– Composting plants– Waste deposit sites– Special applications, e.g. underground garages (in the event that point-type detectors

cannot be used due to climatic conditions)

Figure 4.3 Installing cables on room ceilings

When the sensor cable is installed on room ceilings, distance x must not exceed 6 m. If a shorter distance is selected, the distance between the sensor cable and the wall must always

1 Sensor cable2 Distance between sensor cable and cable

platform

2

1

1 Sensor cable

x0,5x 0,5x

0,5x

0,5x

xx x

1

10 en | Planning Notes Linear Heat Detector


be between 0.5 m and 1.5 m. The sensor cable is fastened to the ceiling at 0.5 m intervals, the minimum distance to the ceiling being 1 cm. The ceiling height of the room to be protected must be no more than 7.5 m.

Installation on Ceiling Joists

Figure 4.4 Installation on ceilings with joists

As a rule, ceiling joists with a height of ≥ 20 cm are calculated as walls, i.e. the distance from sensor cable to joist must be between 1.5 m und 3 m. With ceiling panels measuring less than 3 m in width, it may be difficult to respect these distances. In these cases, therefore, care must be taken to ensure that the sensor cable is installed in the centre of the ceiling panel.

For joists with a height of between 20 cm and 80 cm and where the total ceiling area is a

maximum of 18 m2, the sensor cable must be a minimum of 10 m in length. For joists with a

height of between 20 cm and 80 cm and a total area of between 18 m2 and 36 m2 the sensor cable is split over the two ceiling panels, so that a cable measuring at least 10 m is installed on each ceiling panel.

1 Sensor cable2 Joist3 Front view4 Plan view

18 m2 < A < 36 m2

1

2

2

20 cm < u < 80 cm

h l1 ≥ 10 m l2 ≥ 10 m

3 4

NOTICE! For optimal safety it is recommended in this case that a sensor cable of a length of at least 10 m is installed in both ceiling panels.

Linear Heat Detector Installation | en 11


5 Installation

5.1 Installing the Detector Box

5.2 Cable End Connection

Figure 5.1 Cable End Connection

Sensor cable ends A and B:1. Strip both cable ends by 15 mm.2. Now strip the four wires by approx. 10 mm on every side. Remove the coatings from the

orange and red wires.

LWM 1

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

9 c

m

19 cm12 c

m

20 cm

CAUTION! Installation at temperatures below 0 °C can cause the cable jacket to break. For this reason, install the cable at temperatures above 0 °C and respect the minimum bending radius of 2.5 cm.

CAUTION! Do not heat the sensor cable at selected points using a hot air blower. The cable has thermal conductive properties that can be lost if it is physically deformed.

NOTICE! Intermediate connectors and end connectors are available from Bosch Security Systems.

1 Soldered connections2 Small heat-shrinkable tubes3 White heat-shrinkable tube4 Black end cap

1 2 3

4A B

12 en | Installation Linear Heat Detector


Sensor cable end A:3. Attach the four wires from cable end A to the control unit according to the colors of

terminals 5–8 (Figure 3.1, Page 6).Sensor cable end B:4. Twist the white and orange wires together and solder.5. Twist the blue and red wires together and solder.6. Insulate the soldered connections with the small heat-shrinkable tubes and shrink on.7. Push the white heat-shrinkable tube and then the black end cap over all four wire ends

and shrink again.

5.3 Intermediate ConnectionsTo connect and seal the ends of two sensor-cable sections, create an intermediate connection, as follows:

Figure 5.2

1. Strip the two sensor cable ends by approx. 50 mm. Do not damage the insulation around the four wires in the process.

2. Sensor cable end A: shorten the red and blue wires to 15 mm.3. Sensor cable end B: shorten the orange and white wires to 15 mm.4. Remove approx. 8 mm of insulation from all wire ends.5. Push the white heat-shrinkable tube over sensor cable end A.6. Push the black heat-shrinkable tube over sensor cable end B.Sensor cable end A:7. Push a small heat-shrinkable tube over the orange wire and one over the white.Sensor cable end B: 8. Push a small heat-shrinkable tube over the red wire and one over the blue.9. Twist the wire at sensor cable end A with the wire at sensor cable end B and solder. Only

solder together wires of the same color.10. Push the small heat-shrinkable tube over the soldered connection and shrink on.11. Push the white heat-shrinkable tube over all connections and shrink on.12. Now push the black heat-shrinkable tube over all connections and shrink again.

1 White heat-shrinkable tube2 Sensor cable A3 Small heat-shrinkable tube4 Sensor cable B5 Black heat-shrinkable tube

1 2 3 4 5

Linear Heat Detector Installation | en 13


5.4 Installation in Ex-zonesThe FCS-LWM-1 Heat Detector is designed to monitor ex-zones 1, 2, 21, and 22. With this type of installation, safety barriers must be installed between the sensor cables and the control unit (e.g. MTL 7761 AC from Neuss Measurement Technology) to ensure the safety of the system itself. It is necessary to have two safety barriers per sensor cable. The safety barriers must be situated in a separate housing outside of the Ex-area and close to the control unit.

14 en | Connection Linear Heat Detector


6 Connection

6.1 Control Unit and Fire PanelTo override alarm and fault messages from the fire panel, connect the control unit via potential-free contacts 11–19. Remember that in normal mode, the fault relay is active and the contact between 11 and 12 is therefore closed.

Resetting the Control UnitTo reset the control unit, proceed as follows:– Interrupt the power supply for 6 seconds.– Push the RESET key (see Figure 3.1, Page 6).– Switch on a reset relay as shown in the following.

Figure 6.1 A reset relay connection

6.2 Sensor Cable and Control UnitAttach the four wires on the sensor cable to terminals 5–8 (see Figure 3.1, Page 6) of the control unit.If you cannot attach the sensor cable to the control unit itself, use a further four-wire fire detector cable (2 x 2 x 0.8).– Attach the sensor cable (total length = max. 300 m) to a connection box (min. protection

class IP 65) that is also located in the hazard area.– Now connect the fire detector cable (total length = max. 500 m) to the control unit. The sensor cable can be split into different sections using the connection boxes and fire detector cables, as described below.

NOTICE! To connect just one alarm contact, the dip switch 22 (MAX + DIFF) must be set to ON (see Figure 3.1, Page 6). When MAX ALARM or DIFF ALARM is triggered, both relays are activated and both alarms are transmitted to the control panel.

1 External resistance 3.6 kΩ2 Integrated resistance 8.2 kΩ3 Max. cable length = 500 m4 Connection 9 (EXT. RESET)5 Connection 10 (EXT. RESET)

4

5

1 2

3

Linear Heat Detector Connection | en 15


Figure 6.2 Attaching using connection boxes

6.3 Calibration

Calibration Switch Positions

Table 6.1 Calibration switch positions

Setting the Response Temperature (MAX ALARM)The MAX ALARM calibration switch sets the response temperature at which an alarm is to be triggered. The alarm temperature is 10°C to 12°C above the maximum ambient temperature.

1 FCS-LWM-12 Fire detector cable (max. 500 m)3 Connection box4 Sensor cable (max. 300 m)

LWM 1

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

1 2 3 4

ON

EC

E

1

2 2

3 3 3

4 4

NOTICE! On delivery, the MAX ALARM and DIFF TIME calibration switches are set to the 0 default position, and the DIFF Alarm calibration switch to position 15. Switch position 0 causes a fault indication once the control unit is connected.

1 2 3 4 Switch positionOFF OFF OFF OFF 0ON OFF OFF OFF 1OFF ON OFF OFF 2ON ON OFF OFF 3OFF OFF ON OFF 4ON OFF ON OFF 5OFF ON ON OFF 6ON ON ON OFF 7OFF OFF OFF ON 8ON OFF OFF ON 9OFF ON OFF ON 10ON ON OFF ON 11OFF OFF ON ON 12ON OFF ON ON 13OFF ON ON ON 14ON ON ON ON 15



Table 6.2 Typical application-specific ambient temperatures

The table below shows the positions of the MAX ALARM calibration switch depending on ambient temperature and cable length:

Table 6.3 MAX ALARM Setting Depending on Temperature

Use the following nomogram (see Figure 6.3, Page 17) to identify settings that deviate from the standard in Table 6.1, Page 15. Procedure:1. Mark the cable length on scale "D".

Application Max. ambient temperatureUnderground installation (excluding road tunnels), underground garage

40 °C

Installation on concrete ceilings and thermally non-conductive materials above ground, out of direct sunlight

45 °C

Installation on insulated steel roof or metal container, out of direct sunlight

50 °C

Installation on non-insulated steel roof or in direct sunlight 60 °CRoad tunnel 50 °C

Switch position Max. ambient temperature [°C] Length of the sensor cable in m4 30 1006 35 1008 40 1009 45 10011 50 10012 55 10013 60 100

6 30 1507 35 1509 40 15010 45 15012 50 15013 55 15014 60 150

6 30 2009 35 20010 40 20011 45 20012 50 20013 55 200

7 30 2509 35 25010 40 25012 45 25013 50 25014 55 250

8 30 3009 35 30011 40 30012 45 30013 50 30014 55 300

Linear Heat Detector Connection | en 17


2. Mark the maximum ambient temperature on scale "B".3. Draw a line through the two marker points up to scale "A".4. Read-off the switch position from scale "A" and take the detailed setting from Table 6.1,

Page 15. Odd values are always rounded up.

Figure 6.3 Nomogram

Setting the Response Temperature Dependent on Time (DIFF ALARM/DIFF TIME)DIFF ALARM features two 16-position switches that can be adjusted separately:– DIFF TIME– DIFF ALARMDIFF TIME sets the time span within which the ambient temperature changes. DIFF ALARM sets the temperature at which an alarm is to be triggered in dependence of DIFF TIME.See Table 6.1, Page 15 for DIFF ALARM and DIFF TIME calibration switch positions.FCS-LWM-1 can be used as a grade A1, A2, B, and C heat detector. The response grades are defined according to DIN EN 54-5:2000 as follows:

A Switch position for MAX ALARMB Max. ambient temperature (°C)C Static response temperature (°C)

= Equates to the temperature at which a detector will sound an alarm if it is exposed to an extremely low temperature rate-of-rise.

As a general rule, a temperature rate-of-rise of approx. 0.2 K min–1 is calculated for measuring this temperature.

D Sensor cable length

Class Typical application temperature

Maximum application temperature*

Minimal static response temperature

Maximum static response temperature

A1 25 °C 50 °C 54 °C 65 °CA2 25 °C 50 °C 54 °C 70 °CB 40 °C 65 °C 69 °C 85 °C

A B|C D

25

30

35

40

45

50

55

60

65

7075808590

35

40

45

5055

60

65

70

75

808590

95100105110115120

130140150

1

2

3

4

5

678

9

10

11

12

13

14

15

300250

200

150

1009080706050

40

30

25

20

15

1098765

4

3

2,5

2

1,5

1



The table below shows the positions for the different DIFF TIME and DIFF ALARM calibration switch grades.

Table 6.4 Grade settings (notation: DIFF TIME switch/DIFF ALARM switch = 5/4)

The table below contains recommendations for special applications:

Table 6.5 Application-specific settings for the DIFF ALARM

C 55 °C 80 °C 84 °C 100 °C* The maximum application temperature according to DIN EN 54-5 differs from the maximum ambient temperature defined for the FCS-LWM-1 in Figure 6.3, Page 17. The maximum application temperature is a temperature that can only be applied for short periods of time and is 4 °C below the minimum static response temperature. The maximum ambient temperature for the FCS-LWM-1 is a temperature 10–12 °C below the minimum static response temperature, and can be applied for long periods of time.

Grade A1 Grade A2 Grade B Grade C5/5 (blue cable) 5/8 5/9 6/135/4 (black cable) - - -

Application DIFF TIME

DIFF ALARM

response grade

Underground installation (no road tunnels), underground garage

5 5 A1 (blue cable only)5 4 A1 (black cable only)5 8 A25 9 B

Installation on concrete ceilings and other thermally non-conductive material above ground, out of direct sunlight

5 5 A1 (blue cable only)5 4 A1 (black cable only)5 8 A25 9 B6 13 C

Installation on insulated steel roof or metal container, out of direct sunlight

5 5 A1 (blue cable only)5 4 A1 (black cable only)5 8 A25 9 B6 13 C

Installation on non-insulated steel roof or in direct sunlight

5 9 B6 13 C

Road tunnel 5 5 A1 (blue cable only)5 4 A1 (black cable only)5 8 A25 9 B6 13 C

Class Typical application temperature

Maximum application temperature*

Minimal static response temperature

Maximum static response temperature

NOTICE! If a false alarm is triggered by the DIFF ALARM, proceed as follows:– Shorten the sensor cable for each control unit, but do not shorten to less than the

minimum length of 10 m.– Reduce the response grade with the help of the DIFF TIME/DIFF ALARM DIP switch (e.g.

from A1 to A2).

Linear Heat Detector Maintenance | en 19


7 MaintenanceIn Germany, maintenance and inspection work on security systems is governed by the regulations in DIN VDE 0883, which refer to the maintenance intervals specified by the manufacturer. Bosch Security Systems recommends a functional and visual inspection once a year.

7.1 InspectionFunctional TestVisually inspect the sensor cable and run a function test using the test switches on the control unit at regular intervals. It is not necessary to trigger an alarm by heating the sensor cable, because the thermal conductive properties of the cable are inherent in the system. These properties can only be lost if the cable is physically deformed.

Test switches 27 and 28 (Figure 3.1, Page 6) can be used to simulate faults and alarms. Test switch 27 (TEST FAULT) can be used to simulate faults and test switch 28 (TEST ALARM) to simulate alarms. The corresponding key must be pressed for at least 2 s.To run an LED test, both test switches must be pressed simultaneously for at least 2 s. The message is triggered within 20 s of the test switch being pressed. If configuration switch 23 (ISOLATE) is set to "ON", alarms are not transmitted to the fire panel. However, pressing switch 23 triggers a fault message at the fire panel.

Proof TestIn the configuration below, FCS-LWM-1 exhibits a response behavior in accordance with DIN EN 54-5:2000. The DIFF TIME/ALARM and MAX ALARM settings specified in the document are based on the results of this type test.

Table 7.1 Configuration in accordance with EN 54-5:2000

CAUTION! Do not heat the cable at selected points using a hot air blower. The cable has thermal conductive properties that can be lost if it is physically deformed.

Cable type Heated sensor cable length

Sensor cable length at room temperature

DIFF TIME

DIFF ALARM

MAX ALARM

Class

Blue sensor cable2.799.330.836

10 m 290 m 5 5 5 A15 8 6 A25 9 9 B

Black sensor cable with nylon coating2.799.330.837

10 m 290 m 5 4 5 A15 8 6 A25 9 9 B6 13 12 C

Black sensor cable with steel netting2.799.330.838

10 m 290 m 5 9 8 B

20 en | Maintenance Linear Heat Detector


7.2 Troubleshooting

Table 7.2 Potential error sources

Fault indicator Cause Solution

Yellow fault LED flashing

Sensor cable defective Measure the resistance of the sensor cable. When functioning correctly, the resistance of a loop (white + orange, blue + red) must be less than 100 Ω. If this is higher, it must be reduced. The resistance between the two loops (blue + white) is typically within the MΩ range at 20 °C.

Protective coating on the red and orange sensor line not removed.

Scratch off the red and orange coating from the wire and re-solder the loop.

Cable end connection on sensor defective

Re-solder the connection.

Calibration switch for MAX ALARM at "0"

When the factory default settings are active, the MAX ALARM switches are set to 0. This setting will lead to an error message during operation. Turn on the switch correctly in accordance with Table 6.3, Page 16.

DIP switch 23 for ISOLATE set to "ON"

Set DIP switch 23 for ISOLATE to "OFF".

EXT. RESET input not correctly closed

Connect the EXT. RESET input with 8.2 kΩ resistance.

Green "power" LED will not light up

Inadequate power supply and/or positive and negative poles reversed.

Use the measuring device to check for the presence of a voltage of 10 to 30 V between terminals 1 (PWR–) and 2 (IN+).

Fire panel indicates a fault and LWM-1 does not or vice versa

Switch fault Fault relay if control unit is active in normal mode. The terminal resistor of the fire panel line must be inserted between pins C and NO of the fault relay.

LWM-1 displays alarm and the fire panel does not

DIP switch 23 for ISOLATE set to "ON"

Set DIP switch 23 for ISOLATE to "OFF".

Switch fault Set DIP switch 22 for "MAX + DIFF" to "ON," and connect the fire panel line to one of the two alarm relays.

Linear Heat Detector Technical Data | en 21


8 Technical DataApproval

8.1 ElectricsControl Unit

8.2 MechanicsControl Unit

Sensor Cable

VdS approval G 205066

Voltage 10 to 30 V DCStandby current consumption Max. 25 mA (with 24 V)Current consumption with DIFF ALARM or MAX ALARM Max. 25 mA (with 24 V)Current consumption with fault Max. 15 mA (with 24 V)Switch-on current < 100 mA (with 24 V)

Housing material/color ABS/gray, similar to RAL 7035Overall dimensions (H x W x D) 120 x 200 x 80 mmWeight approx. 550 gDisplay – Green LED: power, continuously lit

– Red LED: ALARM DIFF, continuously lit– Red LED: ALARM MAX, continuously lit– Yellow LED: fault, flashing light

Test keys 2 x for simulating alarm, fault and LED testProtection category IP 65Temperature range -20 °C to +50 °C

Designation Standard cable (blue)

+Nylon coating (black)

+ Steel netting (black)

Order number 2.799.330.836 2.799.330.837 2.799.330.838Exterior diameter 3.15 mm 4.8 mm 5.8 mmWeight (200 m) 3.2 kg 4.7 kg 9.7 kgMinimum tensile strength (N)

100 100 + 1000

Length of sensor cable

max. 300 m

Wire diameter 0.46 mmInsulation thickness 0.34 mmCoating thickness 0.25 mmWire material – White + blue wires: copper

– Orange + red wires: copper with polyester coatingInsulation – White + blue wires: specially doped NTC polymers

– Orange + red wires: non-conductive polymersWire colors 1 = orange, 2 = white, 3 = red, 4 = blueResistance to temperature

All: < 100 °C — unlimited, < 150 °C — 350 h, < 175 °C — 25 hStandard blue cable (2.799.330.836) > -5 °C = unlimitedBlack cable with nylon or steel (2.799.330.837 or 2.799.330.838) > -60 °C = unlimited

22 en | Technical Data Linear Heat Detector


8.3 Resistivity: Sensor Cable (Black)

NOTICE! The table below showing resistivity levels is based on the nylon-coated sensor cable (black) in liquid at a temperature of 20°C. This data relates to results from tests performed under ideal laboratory conditions. However, no liability is accepted for malfunctions occurring through interaction.

Concentration ResistanceInorganic alkalisSodium hydroxide, caustic potash up to 50% GoodAmmonium hydroxide concentrated GoodAmmonia liquid/gas GoodInorganic acidsHydrochloric acid, sulfuric acid up to 10% GoodPhosphoric acid up to 50% GoodNitric acid All concentr. PoorChromic acid 10% PoorSulfur trioxide 10% LimitedInorganic substancesWater, sea water, oxygen, hydrogen, fertilizer, other saline solutions

Good

Hydrogen peroxide up to 20% GoodDiluted bleach LimitedOzone up to 10% LimitedFluorine, chlorine, bromine PoorPotassium permanganate 5% PoorOrganic alkalisUrea GoodDiethanolamine 20% GoodAminobenzene, pyridine Pure LimitedHydrocarbonsMethane, propane, butane, acetylene, benzene, toluene, xylene, styrene, cyclohexane, naphthaline, freon 12, freon 22, hexane

Good

AlcoholsMethanol, ethanol, butanol, glycerine, glycol GoodBenzyl alcohol LimitedAldehydes and ketonesAcetone, acetaldehyde, cyclohexanone, methylethylketone, methylisobuthylketone, benzaldehyde

Good

Halogenated solventsMethylbromide, methylchloride, trichlorethylene, perchlorethylene

Good

Tetrachlorocarbon, trichlorethane PoorOther organic substancesSalts, esters, ethers, tetrahydrofurane, ethylenoxide, carbon disulphide, furfurylalcohol, diacetone-alcohol, glucose dimethylformamide

Good

Phenols, ethylenchlorhydrine Poor

Linear Heat Detector Technical Data | en 23


Various substancesCoking plant gas, oils, fats, beer, wine, fruit juices, regular gasoline, premium gasoline, kerosene, mineral oil, milk, mustard, liquid soap, vinegar, peanut oil

Good

Concentration Resistance

24 en | Technical Data Linear Heat Detector


Bosch Sicherheitssysteme GmbHWerner-von-Siemens-Ring 1085630GrasbrunnGermanywww.boschsecurity.com© Bosch Sicherheitssysteme GmbH, 2010

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