CRJ Self Regulating Pipe Freeze Protection Cables, Pipe freeze & gutter protection by BN Thermic

CRJ

Self Regulating Water Pipe Freeze Protection Cable

• Prevents water from freezing in metal and plastic pipes
• Avoids the cost and inconvenience of burst pipes
• Self regulating technology and recommended thermostatic control ensures lowest possible running costs

Typical Applications

• Stables
• Sprinkler systems

Features

• Self regulating technology ensures that cable output will decrease as ambient temperature increases
• Can be cut to length, terminated, T jointed and spiced on site using the BN Thermic’s termination and splice kits
• Can be double wrapped to protect valves, flanges etc. without risk of creating hot spots
• Fully moisture proof with full length earth braid

Controlling CRJ Self Regulating Pipe Freeze Protection cable

Although the cable’s self regulating technology ensures that cable output will decrease as ambient temperature increases, thermostatic control is still recommended. A master frost thermostat will prevent the low level of electricity consumption that would otherwise occur when the ambient temperature was above freezing point.

BN Thermic offers a choice of two frost thermostats: FST-IN and FST-EX. The FST-EX should be selected for outdoor applications or where a tamperproof device is preferred. Both thermostats have a switching capacity of 10A. Larger loads can be switched via a suitably rated contactor.

Specification

Notes on Selection and Installation

• Use the following tables to select the correct output and length of cable required for your application. You will notice that in most instances a straight run of cable will suffice. The table also indicates the thickness of the insulation which should cover both pipe and cable.
• A CRJ-T1 termination kit will be required per circuit with one CRJ-S splice kit required for every splice or T
• Secure the cable to the pipe at 200mm intervals using PF-T fixing tape
• Plastic pipes should be wrapped in AL50 aluminium tape before installing the cable
• Maximum circuit lengths are as follows:
  CRJ-10: 205m
  CRJ-25: 126m
• BN Thermic PF-L warning labels should be applied to the outside of the insulation

CRJ Selection Table 1

(minimum ambient temperature -20°C)

CRJ Selection Table 2

(minimum ambient temperature -20°C)

Breaker Selection for CRJ Self Regulating Cable

Use type C breaker

Thermostats

FST thermostats can switch up to 116m of CRJ-10 and up to 60m of CRJ-25. Longer lengths can be switched via a suitably rated contactor. 

Product information downloads

• Download a PDF specification for easy printing
• Download a PDF of our instruction sheet