Raychem HWAT-ECO Mode D'emploi page 26

Fig. 9
Permitted pipe / insulation combinations
Pipe sizes
15 mm 20 mm 25 mm 32 mm 40 mm 50 mm 100 mm
Insulation
9 mm
13 mm
20 mm
25 mm
30 mm
40 mm
50 mm
60 mm
70 mm
80 mm
90 mm
100 mm
Installation using plastic pipes.
When using plastic pipes, the general installation principles for heat-tracing
of plastic pipes should be respected (i.e. using Aluminium tape ATE-180 as
installation method). If correctly installed, the temperature behaviour will be
comparable with metal piping. Deviations of temperature can be compen-
sated for by using the 'Power Correction Factor'.
Special applications
If special applications are wanted, heat loss calculations must be performed
to predict achievable temperatures. Contact your local Tyco Thermal
Controls supplier for assistance and advice.
5.3 Legionella prevention by temperature shock
The growth of legionella pneumophila is dependent on temperature:
HWAT-R and HWAT-ECO offer the possibility of increasing the water temper-
ature by fully powering the HWAT-R. The increased water temperature ena-
bles decontamination (measures anti-scalding are essential). Most legionella
pneumophila bacteria are killed at 60°C over a period of 30 minutes.
Warning: The selected pipework material should be able to resist the
decontamination temperature.
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