1. Alarmline Linear Heat Detection
Slide 1 - Linear Heat Detection Sales Overview
Opening title slide
This is a sales overview only, a technical training course is available.
Training presentation 2010

2. What is Linear Heat Detection?
Temperature Related Risk Protection
Data supplied by fire insurance companies indicates that most industrial fires are caused by
Friction heat & sparks
Overheating of equipment
Spontaneous combustion
Oil & oil fired equipment

3. What is Linear Heat Detection?
Cable-type Sensor
“Point of Risk” Detection Method
Detects Heat From Fire
Last stage of fire
Typically used where smoke, flame or other detectors are not an option

4. Linear Heat detection products
Alarmline digital: Fixed temperature detector.
Alarmline Analogue: Averaging heat detector
Slide 4 - What is Linear Heat Detection?
Bullet 1 - Continuous detection over the full length of the cable
Unaffected by extremes in temperature (-65oC to 238oC)
Suitable for internal and external applications
Provides an easy solution for awkward risks:
- Cable trays
- Conveyer belts
- Thatched roofs
- Historic buildings
- Car parks etc.
Bullet 2 - Analogue cable has 4 cores and will provide detection of hot spots or
changes in temperature over the whole cable length.
The alarm is operated by the average resistance of the cable
i.e. overall resistance of the cable length in an Alarm condition is the
same whether the whole cable reaches its alarm temperature or a short
section of the cable reaches a higher temperature i.e. a hot spot.
Bullet 3 - Digital cable has two cores and provides fixed temperature detection over a wide range of temperatures selected by the cable type.

5. Alarmline digital cable
Two core cable
Insulation designed to melt at a specific temperature
When cable melts two inner cores short circuit.
Monitoring equipment detects the short circuit and activates its alarm sequence
The section of cable that has melted must be replaced to return the cable to its normal state

6. Alarmline Digital Cable range
H8040N
Black nylon outer sheath
Max Ambient temperature 45oC
Alarm temperature 63-70oC (Nominal 67oC)
Suitable for internal and external applications
Slide 20 - Alarmline Digital cables
5 different temperature selections.
Bullet Also available with a nylon over sheath providing
chemical protection, can be used externally.
Cable colours:
Red/green degrees centigrade
Red/black degrees centigrade
Black degrees centigrade
Red degrees centigrade
White degrees centigrade

7. Alarmline Digital Cable range
H8045N
Red/black polythene braid with black nylon outer sheath
Max Ambient temperature 45oC
Alarm temperature 79-95oC (Nominal 87oC)
Suitable for internal and external applications

8. Alarmline Digital Cable range
H8028
Black PVC outer sheath
Max Ambient temperature 70oC
Alarm temperature oC (Nominal 105oC)
Suitable for internal and external applications. Excluding areas contaminated by chemical agents.

9. Alarmline Digital Cable range
H8069N
Red PVC outer sheath
Max Ambient temperature 105oC
Alarm temperature oC (Nominal 183oC)
Suitable for internal and external applications
Not suitable where exposed to long periods of direct sunlight

10. Alarmline Digital Cable range
H9650N
White Fluoropolymer outer sheath
Max Ambient temperature 200oC
Alarm temperature oC (Nominal 240oC)
Suitable for internal and external applications where high ambient temperatures or protection against chemical agents is required

11. Alarmline Digital Cable Construction
Conductor
Tinned copper covered steel
Insulation
Temperature sensitive thermoplastic or Fluoropolymer
Jacket
PVC, Nylon or Fluoropolymer

12. Monitoring Alarmline Digital cable
Any monitored input capable of monitoring a switch operation
Conventional detection zone
Sirius II conventional panel
FireBeta XT or XT+
Addressable zone monitor interface or switch monitor interface
Apollo ZMU or SMU
Hochiki CHQ-SZM, CHQ-DIM, CHQ-Z or CHQ-SIM

13. Connecting Alarmline digital cable to a monitored input
Detection zone or switch monitoring circuit + -
Interposing cable
Alarm resistor
End of Line monitoring resistor
Alarmline Digital sensor cable

14. Addressable vs. Conventional
ZONE A
ZONE B
ZONE C MP
To Conventional Panel
To Additional Zones
LHS
Hard-Wired System

15. Addressable vs. Conventional
ZONE A
ZONE B
ZONE C
Loop interface
Loop interface
Loop interface
LHS
Addressable loop
Addressable loop
MCP
MCP
MCP
Addressable System

16. Alarmline Analogue Cable
Multi-conductor cable containing insulators whose resistance varies proportionately to changes in temperature
Re-settable provided temperature does not exceed burn-off point of PVC coating
Flexible alarm level adjusted via controller
Allows testing without damaging cable

17. Alarmline Analogue Cable range
Standard blue (K82017)
Non-corrosive atmospheres
Mechanical damage unlikely
Nylon extruded (K82021)
Chemical protection
Bronze braided (K82078)
Mechanical protection
Stainless Steel braided over nylon extruded cable (K98166)
Mechanical and Chemical protection
Slide 11 - Alarmline Analogue LHD cables
Bullet 1 - Interior applications where cable is unlikely to be subjected to extreme conditions or mechanical damage.
Bullet 2 - For applications where resistance against chemicals is
required, or external applications providing protection against the elements.
Bullet 3 - Applications where mechanical protection is required, escalators, conveyor belts etc.
Bullet 4 - Applications which require mechanical and chemical protection generally offshore applications.
Note: Addition of the braidings and extrusions does not affect the performance of the cable.

18. AlarmLine Analogue cable construction
4 conductor 0-46 mm dia copper cable
Two conductors for heat sensing
Two enameled conductors for continuity
Twisted at 30 turns per foot to cancel potentially high voltage inductance
Continuity monitoring
Resistance (Temperature sensing)
Continuity monitoring
IMPORTANT! Always ensure the varnish coating is removed from the Orange and Red wires before termination.

19. Monitoring Alarmline Analogue cable
Requires purpose built interface
LHD4 Controller
2 wire connection
Fire and Fault relay (energised)
Fire and Fault relay (de-energised)
LWM-1 Controller

20. Alarmline LHD 4 Controller
Polycarbonate enclosure IP55
LED status indications
Test switch
Alarm level adjusted via moveable link
Open circuit and closed circuit fault monitoring
Allows quick system adjustments without cable or hardware change
Maximum 1000m detection cable
Can only be reset by removing the power

21. Alarmline LHD4 internal connections
Power supply output
24v output to power additional controllers
Remote Fire LED output
24vdc output
Fault contact terminals
Used to provide fault monitoring when powered from a conventional detection circuit
Sensor cable terminals
3 - Orange wire
4 - White wire
5 - Red wire
6 - Blue wire
Important! Always remove varnish coating from Orange and Red wires before terminating
Relay outputs
Rated 2 30vdc
Fire relay – Common, N/O, N/C terminals
Fault relay - Common. N/O, N/C terminals
Energised or de- energised options
Supply terminals
Supply voltage 8 to 30vdc
Current rating:
Without relays QI – 180µA AI – 70mA
With relays QI – 20mA AI – 85mA

22. Interfacing LHD4 to a two wire detection zone
LHD controllers are powered direct from the zone
Maximum three control units powered from a single zone

23. Alarmline Analogue - Conventional system
Standard 2
core cable
Kidde
Control
Panel
Junction
Box
2 Wire
Interface
Module
Hazard
AlarmLine Sensor
Standard 4
core cable
Max (1,000 m)

24. Alarmline Analogue – Addressable fire system
Smoke
Det
Heat
Det
MCP
MCP
Addressable Loop
~1000 Meters
Max 127 Loop
devices
Loop
I/F
Loop
I/F
Loop
I/F
LHD
LHD
LHD
AlarmLine Analogue Sensor
24v PSU
240vac

25. Alarmline Analogue - Nomogram
Calculates alarm link setting based on
Max ambient temp or
Specific Alarm temp
Calculates ‘HOT SPOT’ temp
Calculates maximum possible alarm temperature for a fixed cable length

26. How to set the Alarm thresholds
Use the Nomogram provided in the Alarmline Analogue manual
Step 1 - Select the length of
cable i.e.100m (D)
Step 2 - Select the Max Ambient Temperature where an alarm must not be given (B) 45oC
Step 3 - Draw a line through the two points continuing through the switch setting line (A)
Step 4 - Set the controller to link position 6
The above provides us with a configuration of:
Max Ambient temperature 45oC
Alarm temperature 57oC

27. How to calculate a ‘HOT SPOT’ temperature
A ‘HOT SPOT’ is where only a small section of the cable length is subjected to heat.
This section will have to reach a higher temperature before an alarm is activated
To calculate the hot spot draw a line from the switch setting across to the hot spot length
Example
10 meter length = Alarm temp 84oC
1 meter length = Alarm temp 120oC

28. Using the Nomogram as a design tool
The Nomogram can provide assistance in determining zone sizes for larger areas
If we draw a line from the cable length column across to our maximum link setting we can determine the maximum possible ambient temperature for that cable length
If the calculated max ambient temp is below the actual ambient temp then it may be necessary to reduce the system into smaller cable lengths
Example:
Cable length 1000m gives a maximum possible ambient for the cable of 41oC and maximum alarm temp 48oC
Cable length 500m gives a maximum possible ambient for the cable of 48oC and maximum alarm temp 62oC

29. Alarmline LWM-1 Controller
Approved to EN54 Part 5 when used with K82017, K82021 and K98166
Maximum cable length 300m
Can be configured for fixed temperature (Max Alarm) or rate of rise (Diff Alarm)
LED status indications
Internal pushbutton controls
Test (Fault)
Test (Alarm)
Reset
Relay outputs
Diff Alarm
Max Alarm
Remote reset facility
Requires 24vdc supply, Max current 25mA
ABS enclosure, IP65

30. LWM-1 Controller - Internal controls
Configuration switches
4 DIL switches used for configuring the controller to the application
RESET
Momentary pushbutton performs a fault condition soft reset when pressed for a minimum of 2 secs
TEST – Fire
Momentary pushbutton simulates an alarm condition when pressed for a minimum of 2 secs
TEST – Fault
Momentary pushbutton simulates a short circuit cable fault when pressed for a minimum of 2 secs

31. Alarmline LWM-1 Configuration switches
Diff and Max alarm combined
In the ‘ON’ position if either the Max- or Diff-Alarm is triggered both alarm relays will be activated. The corresponding alarm-LEDs will be activated on their individual alarms.
Default position is ‘ON’
Isolate
In the ‘ON’ position this prevents the alarm relays from activating in an alarm condition.
The Fault relay will operate and the Fault LED will illuminate constantly
DIFF TIME
The ‘DIFF TIME’ is the time window for rate of rise detection.
The shorter the time interval the less sensitive the system response is.
MAX ALARM
The MAX ALARM switch sets the fixed alarm temperature value.
This value is set using the Nomogram.
DIFF ALARM
The DIFF ALARM switch changes the temperature range for a rate of rise alarm.
The higher the value chosen the higher the possible temperature

32. DIFF TIME and DIFF Alarm settings
LWM-1-System can be configured to operate as a heat detector of the classes A1, A2, B and C. The adjustments are given depending on sensitivity class and the length of the installed sensor cable.
Classification
DIFF TIME switch setting
DIFF ALARM switch setting
Comments A1 5
Standard blue cable only 4
Nylon coated cable only A2 8 B 9 C 6 13

33. Application specific – Sensitivity settings
DIFF TIME
Switch setting
DIFF ALARM
Sensitivity class
Underground Installation (no road tunnels) 5 4 8
A1 (Blue cable only)
A1 (Nylon cable only) A2
Installation on concrete ceilings and other non-heat conducting materials above ground, not exposed to direct solar radiation 6 9 13 B C
Installation on insulated metal ceiling or metal container not exposed to direct solar radiation
Installation on un-insulated metal ceiling or if exposed to direct solar radiation
Road tunnel

34. Configuring MAX ALARM setting
The MAX ALARM setting is calculated using the Nomogram.
A 100m length of cable to give a fixed alarm temperature of 55oC would be set switch setting 8.
A 1 metre HOT SPOT on switch setting 8 would alarm at 115oC
MAX ALARM switch setting
Max ambient temp oC
Specified alarm temp oC
Cable length (m)

35. Alarmline Linear Heat Detection
Installation and commissioning

36. Installation recommendations Alarmline cable
Installation of the cable will depend greatly upon the application
Cable should be supported every metre
1 Clip either side of a bend
Minimum bend radius
Digital cable 50mm (Cold store 100mm)
Analogue cable 10mm (Cold store store 100mm)
Interposing cable
Analogue
LHD4 – 2Km Max
LWM-1 – 500m Max
When using metal clips cable must be insulated from the clip using a neoprene sleeve

37. Standard fixing clip types
Channel bracket
Pipe bracket
‘T’ Clip
Edge clip
‘V’ Clip
‘L’ bracket
Distance piece

38. Jointing and terminating Analogue cable
K82024 In-line Jointing kit
K82023 End of line termination kit

39. Installation in intrinsically safe areas
Suitable for use in Class 1, Div 1, Groups A, B, C, D classified areas
Detection cable must be wired through IS barriers before connecting to the control unit
Approved IS barriers
Analogue cable MTL7761ac, 2 x barriers per cable
Digital cable MTL5061, 1 x barrier per cable
Ex approved junction boxes must be used when terminating and joining cables.

40. Commissioning Alarmline Digital system
Visual examination
Add an extra piece of sensor cable to the end of the installed sensor cable to assist with testing
Apply sufficient heat to trigger an alarm condition
Heat oven or heat gun can be used
Simulate an open circuit fault by disconnecting one core of the sensor cable
In hazardous areas alarm can be simulated by placing a short circuit across the sensor cable
Record the results

41. Commissioning of Alarmline Analogue cable
Visual examination of sensor cable
Check wiring connections
Check alarm settings using Nomogram
Simulate alarm and fault using test switch
Simulate open and circuit fault on sensor cable
Apply heat to a 1 metre section of the cable using the heat oven and ensure the system alarms at the correct temperature (check Nomogram)
Record the results

42. Fault finding digital cable
Control panel indicates sensor cable fault
Check wiring connections
Ensure correct value end of line monitoring resistor is fitted
Control panel indicates sensor cable fire
Ensure fire condition does not exist
Check the cable for damage i.e. short circuit
Check alarm resistor is located correctly in the circuit
Check end of line resistor is correct value
Cable activated but panel displays fault not fire
Check alarm resistor is in circuit
Check cable isn’t damaged i.e. open circuit
Cable open circuit but no fault on panel
Check end of line is correctly located at end of sensor cable

43. Fault finding Alarmline Analogue system – LHD4
LHD4 unit indicates fault
Check the sensor cable connections
Check the sensor cable for damage
Check that varnish has been removed from the orange and red cores at both ends of the sensor cable
Check alarm link setting
Heat applied to sensor cable but alarm not activated
Check cable for damage
Ensure sufficient heat applied
LHD4 showing no faults but fault indicated at main fire panel
Check whether fault relay is energised or de-energised version and check fault relay wiring
LHD4 showing no fire but fire indicated at main fire panel
Check wiring of fire relay

44. Fault finding Alarmline Analogue system – LWM-1
LWM-1 indicates fault
Check the sensor cable connections
Check the sensor cable for damage
Check that varnish has been removed from the orange and red cores at both ends of the sensor cable
Check Max Alarm switch
Check Isolate switch
Check external reset wiring and monitoring resistor
Heat applied to sensor cable but alarm not activated
Check alarm switch settings
Check cable for damage
Ensure sufficient heat applied
LHD4 showing no faults but fault indicated at main fire panel
Check fault relay wiring
LHD4 showing no fire but fire indicated at main fire panel
Check fire relay wiring

45. Alarmline Linear Heat detection
Design and application guidelines

46. Advantages of Alarmline Linear Heat Detection
Unaffected by environmental conditions
Installation at point of risk
No maintenance required
Suitable for hazardous areas

47. Protection of cable trays and risers
Cable installed close to risk to detect a cable overheat
A single cable can cover a cable tray 600m wide
Cable positioned max 200mm above cable tray
Sensor cable run underneath lowest cable tray to detect rubbish fires
‘V’ clips, L brackets distance pieces may be required

48. Escalator protection
Main risk is overheat due to friction, or build up of rubbish under escalator
Protects drive motor, roller bearings, dust collection trays and truss rollers
Recommended analogue cable with bronze or stainless steel braiding
Edge clips are generally most suitable

49. Conveyor belts Main risks overheat on bearings due to friction
Cable installed close to point of risk
If possible consider cable above and below the conveyor
To provide best coverage cable should be run down both sides of conveyor
Recommended bronze or stainless steel braided analogue cable
Edge clips likely most suitable

50. (of specified temperature)
Road tunnels 10 2 . 5
Main risk vehicle fire
Consider splitting tunnel into smaller detection zones
Sensor cables run down both sides of tunnel, consider sensor cable down centre of tunnel To
Control
Panel
Junction
Box
Detection Cable
(of specified temperature)
‘T’ Clips likely most suitable
Consider Nylon coated sensor cable for environmental protection

51. Car parks Risk vehicle fire Consider size of detection zones
Consider spacing of cable runs
Cable fixed to ceiling
‘T’ Clips likely most suitable
Control Interface
Unit
(Analogue)
Junction Box
(Digital) 9m
typical

52. Storage areas – general area protection
Sensor cable at high level
Consider sensor cable sensitivity
Fixing clips possibly ‘T’ or edge clips
Same design limitations as point type heat detectors
Maximum spacing between cable runs 10.3m
Maximum installation height 9m

53. Storage area in-rack protection
Improves the response time of the system
Where highly flammable or high value equipment is stored
Ensure cable positioned where it won’t be damaged
Edge clips possibly most suitable
Consider running cable at various levels

54. Floating Roof Storage Tanks
Main risk overheat due to friction, fuel fire
Consider possible hazardous environment
Sensor cable installed around rim seal
Fixing arrangement will depend upon rim seal design
Requires cable reeler
Ex junction boxes
Consider detection around bund areas also
Nylon coated sensor cable

55. Floating roof tank schematic

56. Other applications Boilers Control cubicles Engine bay protection
Silos and driers
Thatched roofs
Paint spray booths
Rolling stock
Transformers
And many more