Arnold Rak 18.0 m Heating Cable / HK-18,0 Data Sheet

 
 
 
 
 
 
 
 

 
 

(type HK-2,5-F to HK-25,0-F) 

 
Pipe heating systems can be installed on practically any pipe in order to protect them against frost or 
to maintain the required temperature of hot water pipes (e.g. provision of drinking water for animals 
outdoors and in stables). 
 
The completely pre-assembled and directly applicable heating cable contains a thermostat which 
ensures the energy-saving control of the heating cable. The thermostat automatically turns on (at app. 
+5º C) so that freeze-up can be excluded.

 

 
Installation notes: 
First, place the thermostat with the flat side at the coldest point on the bottom of the pipe and attach it 
with self-adhesive aluminium foil making sure that it has the largest possible contact area with the 
pipe. 
Depending on the required heating performance, the heating cable is installed below the pipe. 
Alternatively, the heating cable can be wound around the pipe (minimum distance between loops 10 
cm). Make sure that the entire heating cable is attached to the pipe. Shortening the heating cable is 
not permitted.

 

The heating cable is glued to the pipe with self-adhesive aluminium foil at regular intervals to ensure a 
continuous contact of heating cable and pipe and to eliminate the possibility of the heating cable being 
pushed into the pipe insulation material. 

 

For plastic pipes, the pipe should subsequently be wrapped with self-adhesive aluminium foil in order 
to achieve a better heat transfer. 

 

Before attaching the pipe insulation material, a visual inspection for damages should be conducted. 
The pipe insulation must then be fixed with commercially available insulation material (min. R-value 
0.035 W/mK). This is absolutely necessary in order to achieve the required frost protection and 
reduces power consumption.

 

Finally, the heating cable must be connected to a power outlet (230 V) protected with max. 6 A. 

 

Identification labels should be attached to the pipe insulation material at regular intervals (4 m) 
indicating that the pipe is heated.  Operation of the heating cable in conjunction with a residual current 
circuit breaker is recommended.

 

 
 

Application: Seeding and nursing of plants 
 

Electric heating cables provide an effective germination aid and accelerate growth by heating the soil, 

especially in cold frames. 
The heating cable is laid out on the ground in meanders according to the given conditions. Spacers 
can be used to maintain the desired distances. Installation in a screed layer is sensible.

 

The embedding depth of the heating cable primarily depends on the plant structure. The plants’ roots 
should not come into contact with the heating cable.

 

To prevent damage to the heating cable by gardening tools, a steel reinforcing matt can be placed 
over the heating cable. Additionally, a notice warning that the beds are heated can be attached.