Legionella Prevention By Temperature Shock - Raychem HWAT-ECO Handbuch

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-trac-
ing of plastic pipes should be respected (i.e. using Aluminium tape ATE-
180 as installation method). If correctly installed, the temperature behav-
iour will be comparable with metal piping. Deviations of temperature can
be compensated for by using the 'Power Correction Factor'.
Special applications
If special applications are wanted, heat loss calculations must be per-
formed 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 tem-
perature by fully powering the HWAT-R. The increased water temperature
enables decontamination (measures anti-scalding are essential). Most
legionella pneumophila bacteria are killed at 60°C over a period of 30 min-
utes.
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