Frequently Asked Questions

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.

The low smoke zero halogen outer coat maintains flexibility at low temperatures and enables the detection cable to operate continuously in temperatures as low as -60⁰C. The maximum ambient operating temperature is determined by the alarm temperature and can be found in the installation manual.

The low smoke zero halogen outer coat has good resistance against ammonia, copper nitrate, hydrofluoric acid and acetic acid.

Please contact us if you have a question on the chemical compatibility of this material.

Thermocable’s ProReact Plus Digital LHD cable is both UL and ULC approved. This approval covers both the low smoke zero halogen outer coat and the optional stainless steel outer braid.

Low smoke zero halogen cables are being increasingly specified and used in environments where smoke and harmful emissions released in the event of a fire could endanger human life. ProReact Plus Digital LHD cable is a low smoke zero halogen, UV stable and hydrocarbon resistant alternative to traditional digital linear heat detection cable.

The low smoke zero halogen outer coat has good resistance against ammonia, copper nitrate, hydrofluoric acid and acetic acid.

Please contact us if you have a question on the chemical compatibility of this material.

This detection cable is available in 100 metre, 200 metre or 500 metre reel lengths as standard. Non-standard lengths can be supplied but will incur a small surcharge. Please note that the maximum available reel length is 500 metres per spool.