Carry Out Thermal Disinfection - Bosch ZSB 30-2 A Operating Instructions Manual

30 | Carry out thermal disinfection

5 Carry out thermal disinfection
To prevent the DHW becoming contaminated by bacteria such as
legionella, we recommend you pasteurise the system after longer
idle periods.
With some heating controllers, thermal disinfection
can be programmed for a fixed time; see heating
controller operating instructions.
Pasteurisation covers the DHW system including the draw-off
points. For solar DHW cylinders, the solar portion of the cylinder
is not covered.
DANGER: Risk of scalding!
Hot water can result in severe scalding.
B Carry out thermal disinfection only outside the
normal hours of use.
B The water in the tank will take a while to cool
down to the set hot water temperature as a
result of heat loss. Be aware that, after thermal
disinfection, the hot water may be hotter than
the set temperature.
B Turn off all hot water points.
B Warn occupants of risk of scalding.
B If the heating programmer has a DHW program, set the time
and DHW temperature accordingly.
B If there is a circulation pump, set it to run continuously.
6 720 644 144 (2010/09)