2.7.5 Return lift
If the hot water return is below the minimum return temperature, some of the hot water
outfeed will be mixed in.
CAUTION
Risk of dropping below dew point/condensation formation if operated without
return temperature control.
Condensation water forms an aggressive condensate when combined with
combustion residue, leading to damage to the boiler.
Take the following precautions:
❒ Regulations stipulate the use of a return temperature control.
➥ The minimum return temperature is 60 °C. We recommend fitting some
sort of control device (e.g. thermometer).
2.7.6 Combination with storage tank
You can find more detailed information about storage tank design in the boiler
assembly instructions.
NOTICE! See "Design Information" section in the assembly instructions S3 Turbo
2.7.7 Chimney connection/chimney system
EN 303-5 specifies that the entire flue gas system must be designed to prevent,
wherever possible, damage caused by seepage, insufficient feed pressure and
condensation. Please note in this respect that flue gas temperatures lower than 160K
above room temperature can occur in the permitted operating range of the boiler.
NOTICE! Please see the technical data contained in the assembly instructions for
further information about standards and regulations as well as the flue gas
temperatures when clean and the other flue gas values!
Safety
2
Design information
Operating Instructions S3 Turbo | B0610717_en 17
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