Programmable Temperature Sensing (Resettable) FAQ's
Yes. In certain applications it may be desirable or necessary to use non-sensing leader cable between a ProReact Analogue control unit and the detection cable. This may be required if the expected ambient temperature range, or other environmental conditions, where the Analogue LHD cable is to be used is greater than the maximum ambient temperature range for the control unit.
The maximum length of leader cable that can be used per ProReact Analogue LHD system is 250 metres. Thermocable can manufacture and supply leader cable that is compatible with its ProReact Analogue LHD cable. Please contact us or refer to the installation manual if you require further information.
Please contact us directly and we can provide this free of charge.
UL approval has been granted for two versions of control unit. One is a self-contained unit or, for finer control, a version requiring a laptop prevents uninvited system access via a software programme.
Cable zone lengths can vary from 30 metres to 500 metres in length.
Please find below the list of components certified according to UL521:
- ProReact Analogue LHD cable – PVC
- ProReact Analogue LHD Cable – Nylon
- ProReact Analogue Control Unit – Self-Programmable inc. EOL unit
- ProReact Analogue Control Unit – Laptop-Programmable inc. EOL unit
Thermocable recommends against installing its ProReact Analogue linear heat detection cable across varying ambient environments as this can interfere with the operation of the system. We recommend that multiple ProReact Analogue LHD systems are used in this instance (one for each different environment) or a digital linear heat detection system is installed as it would not be affected by varying ambient temperatures.
We also insist that the detection cable or end of line unit do not come into contact with any material that acts as a heat sink. A silicone sleeve (C1283) should be used to support the detection cable to a fixing clip to avoid heat transfer and end of line units should not be installed directly onto metal objects.
System designers and/or installers should ensure that the detection cable is spaced at less than or equal to the maximum approved spacing in the relevant or local building regulations or fire safety standards.
Thermocable’s analogue linear heat detection cable and end of line units can continuously operate in temperatures as low as -40⁰C. The control or interface units typically have a minimum ambient operating temperature of 0⁰C.
In order to minimise false alarms and ensure your ProReact Analogue LHD system responds as expected, it is very important to make sure that the chosen control unit setting for selecting the alarm temperature is suitable for use given the typical and maximum application temperatures that are likely to be expected during normal operation in the installed environment.
Please refer to the installation manual for further information on typical and maximum application temperatures.
Yes, all Thermocable’s control or interface units require a 24V power supply.
No, a control or interface unit must sit between the analogue linear heat detection cable and a fire panel or addressable loop.
Analogue linear heat detection systems identify fires or overheat conditions by continuously measuring changes in electrical resistance along the detection cable. An alarm is triggered once the resistance along the cable falls below a set threshold.
Yes this is possible, but some considerations must be made. Please contact us for any queries on extending a zone or replacing a section of ProReact EN Analogue sensor cable within an existing zone.
ProReact EN Analogue sensor cable is comprised of four inner core wires.
Yes. For Class A1I / A2I, 54⁰C and 64⁰C alarm settings, the rate-of-rise alarm is activated when 2 to 5% of the sensor cable is heated at more than 15⁰C per minute for more than 3 minutes.
Both the ProReact EN Analogue sensor cable and the ProReact EN Analogue Composite Control (PACC) unit can be tested independently. Please refer to the installation manual and the sensor cable testing instruction manual for more information.
The installation manual and data sheet are available in English, German, Polish and French. Further languages may be available on request.
Yes, with the use of intrinsically safe barriers. Please refer to the hazardous area installation guide for more information.
Thermocable recommends that the cable is fixed in place using a clip every 0.5 metres – 1 metre (ideally 0.5 metres to avoid any sagging).
Please contact us directly for a copy of the software.
All ProReact EN Analogue sensor cable is manufactured on-site at Thermocable’s factory in Bradford, West Yorkshire. The standard reel lengths available are 100 metres, 250 metres and 500 metres. Non-standard reels can be supplied at a surcharge if required.
Up to 500 metres of Thermocable’s ProReact EN Analogue sensor cable can be connected to a ProReact EN Analogue Composite Control (PACC) unit.
For nearly all installations, the mandatory minimum zone length is 30 metres. However, the minimum zone length is increased to 50 metres for the Class AI1 / AI2 alarm setting.
